Wed, 27 Aug 2014 08:19:12 -0400
8046598: Scalable Native memory tracking development
Summary: Enhance scalability of native memory tracking
Reviewed-by: coleenp, ctornqvi, gtriantafill
1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
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/orderAccess.inline.hpp"
55 #include "runtime/os.hpp"
56 #include "runtime/perfData.hpp"
57 #include "runtime/reflection.hpp"
58 #include "runtime/vframe.hpp"
59 #include "runtime/vm_operations.hpp"
60 #include "services/attachListener.hpp"
61 #include "services/management.hpp"
62 #include "services/threadService.hpp"
63 #include "trace/tracing.hpp"
64 #include "utilities/copy.hpp"
65 #include "utilities/defaultStream.hpp"
66 #include "utilities/dtrace.hpp"
67 #include "utilities/events.hpp"
68 #include "utilities/histogram.hpp"
69 #include "utilities/top.hpp"
70 #include "utilities/utf8.hpp"
71 #ifdef TARGET_OS_FAMILY_linux
72 # include "jvm_linux.h"
73 #endif
74 #ifdef TARGET_OS_FAMILY_solaris
75 # include "jvm_solaris.h"
76 #endif
77 #ifdef TARGET_OS_FAMILY_windows
78 # include "jvm_windows.h"
79 #endif
80 #ifdef TARGET_OS_FAMILY_aix
81 # include "jvm_aix.h"
82 #endif
83 #ifdef TARGET_OS_FAMILY_bsd
84 # include "jvm_bsd.h"
85 #endif
87 #include <errno.h>
89 #ifndef USDT2
90 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long);
91 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int);
92 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield);
93 #endif /* !USDT2 */
95 /*
96 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
97 such ctors and calls MUST NOT come between an oop declaration/init and its
98 usage because if objects are move this may cause various memory stomps, bus
99 errors and segfaults. Here is a cookbook for causing so called "naked oop
100 failures":
102 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
103 JVMWrapper("JVM_GetClassDeclaredFields");
105 // Object address to be held directly in mirror & not visible to GC
106 oop mirror = JNIHandles::resolve_non_null(ofClass);
108 // If this ctor can hit a safepoint, moving objects around, then
109 ComplexConstructor foo;
111 // Boom! mirror may point to JUNK instead of the intended object
112 (some dereference of mirror)
114 // Here's another call that may block for GC, making mirror stale
115 MutexLocker ml(some_lock);
117 // And here's an initializer that can result in a stale oop
118 // all in one step.
119 oop o = call_that_can_throw_exception(TRAPS);
122 The solution is to keep the oop declaration BELOW the ctor or function
123 call that might cause a GC, do another resolve to reassign the oop, or
124 consider use of a Handle instead of an oop so there is immunity from object
125 motion. But note that the "QUICK" entries below do not have a handlemark
126 and thus can only support use of handles passed in.
127 */
129 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
130 ResourceMark rm;
131 int line_number = -1;
132 const char * source_file = NULL;
133 const char * trace = "explicit";
134 InstanceKlass* caller = NULL;
135 JavaThread* jthread = JavaThread::current();
136 if (jthread->has_last_Java_frame()) {
137 vframeStream vfst(jthread);
139 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
140 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
141 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
142 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
143 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
145 Method* last_caller = NULL;
147 while (!vfst.at_end()) {
148 Method* m = vfst.method();
149 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
150 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
151 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
152 break;
153 }
154 last_caller = m;
155 vfst.next();
156 }
157 // if this is called from Class.forName0 and that is called from Class.forName,
158 // then print the caller of Class.forName. If this is Class.loadClass, then print
159 // that caller, otherwise keep quiet since this should be picked up elsewhere.
160 bool found_it = false;
161 if (!vfst.at_end() &&
162 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
163 vfst.method()->name() == vmSymbols::forName0_name()) {
164 vfst.next();
165 if (!vfst.at_end() &&
166 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
167 vfst.method()->name() == vmSymbols::forName_name()) {
168 vfst.next();
169 found_it = true;
170 }
171 } else if (last_caller != NULL &&
172 last_caller->method_holder()->name() ==
173 vmSymbols::java_lang_ClassLoader() &&
174 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
175 last_caller->name() == vmSymbols::loadClass_name())) {
176 found_it = true;
177 } else if (!vfst.at_end()) {
178 if (vfst.method()->is_native()) {
179 // JNI call
180 found_it = true;
181 }
182 }
183 if (found_it && !vfst.at_end()) {
184 // found the caller
185 caller = vfst.method()->method_holder();
186 line_number = vfst.method()->line_number_from_bci(vfst.bci());
187 if (line_number == -1) {
188 // show method name if it's a native method
189 trace = vfst.method()->name_and_sig_as_C_string();
190 }
191 Symbol* s = caller->source_file_name();
192 if (s != NULL) {
193 source_file = s->as_C_string();
194 }
195 }
196 }
197 if (caller != NULL) {
198 if (to_class != caller) {
199 const char * from = caller->external_name();
200 const char * to = to_class->external_name();
201 // print in a single call to reduce interleaving between threads
202 if (source_file != NULL) {
203 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
204 } else {
205 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
206 }
207 }
208 }
209 }
211 void trace_class_resolution(Klass* to_class) {
212 EXCEPTION_MARK;
213 trace_class_resolution_impl(to_class, THREAD);
214 if (HAS_PENDING_EXCEPTION) {
215 CLEAR_PENDING_EXCEPTION;
216 }
217 }
219 // Wrapper to trace JVM functions
221 #ifdef ASSERT
222 class JVMTraceWrapper : public StackObj {
223 public:
224 JVMTraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) {
225 if (TraceJVMCalls) {
226 va_list ap;
227 va_start(ap, format);
228 tty->print("JVM ");
229 tty->vprint_cr(format, ap);
230 va_end(ap);
231 }
232 }
233 };
235 Histogram* JVMHistogram;
236 volatile jint JVMHistogram_lock = 0;
238 class JVMHistogramElement : public HistogramElement {
239 public:
240 JVMHistogramElement(const char* name);
241 };
243 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
244 _name = elementName;
245 uintx count = 0;
247 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
248 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
249 count +=1;
250 if ( (WarnOnStalledSpinLock > 0)
251 && (count % WarnOnStalledSpinLock == 0)) {
252 warning("JVMHistogram_lock seems to be stalled");
253 }
254 }
255 }
257 if(JVMHistogram == NULL)
258 JVMHistogram = new Histogram("JVM Call Counts",100);
260 JVMHistogram->add_element(this);
261 Atomic::dec(&JVMHistogram_lock);
262 }
264 #define JVMCountWrapper(arg) \
265 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
266 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
268 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
269 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
270 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
271 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
272 #else
273 #define JVMWrapper(arg1)
274 #define JVMWrapper2(arg1, arg2)
275 #define JVMWrapper3(arg1, arg2, arg3)
276 #define JVMWrapper4(arg1, arg2, arg3, arg4)
277 #endif
280 // Interface version /////////////////////////////////////////////////////////////////////
283 JVM_LEAF(jint, JVM_GetInterfaceVersion())
284 return JVM_INTERFACE_VERSION;
285 JVM_END
288 // java.lang.System //////////////////////////////////////////////////////////////////////
291 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
292 JVMWrapper("JVM_CurrentTimeMillis");
293 return os::javaTimeMillis();
294 JVM_END
296 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
297 JVMWrapper("JVM_NanoTime");
298 return os::javaTimeNanos();
299 JVM_END
302 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
303 jobject dst, jint dst_pos, jint length))
304 JVMWrapper("JVM_ArrayCopy");
305 // Check if we have null pointers
306 if (src == NULL || dst == NULL) {
307 THROW(vmSymbols::java_lang_NullPointerException());
308 }
309 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
310 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
311 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
312 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
313 // Do copy
314 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
315 JVM_END
318 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
319 JavaValue r(T_OBJECT);
320 // public synchronized Object put(Object key, Object value);
321 HandleMark hm(THREAD);
322 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
323 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
324 JavaCalls::call_virtual(&r,
325 props,
326 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
327 vmSymbols::put_name(),
328 vmSymbols::object_object_object_signature(),
329 key_str,
330 value_str,
331 THREAD);
332 }
335 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
338 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
339 JVMWrapper("JVM_InitProperties");
340 ResourceMark rm;
342 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
344 // System property list includes both user set via -D option and
345 // jvm system specific properties.
346 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
347 PUTPROP(props, p->key(), p->value());
348 }
350 // Convert the -XX:MaxDirectMemorySize= command line flag
351 // to the sun.nio.MaxDirectMemorySize property.
352 // Do this after setting user properties to prevent people
353 // from setting the value with a -D option, as requested.
354 {
355 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
356 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
357 } else {
358 char as_chars[256];
359 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize);
360 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
361 }
362 }
364 // JVM monitoring and management support
365 // Add the sun.management.compiler property for the compiler's name
366 {
367 #undef CSIZE
368 #if defined(_LP64) || defined(_WIN64)
369 #define CSIZE "64-Bit "
370 #else
371 #define CSIZE
372 #endif // 64bit
374 #ifdef TIERED
375 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
376 #else
377 #if defined(COMPILER1)
378 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
379 #elif defined(COMPILER2)
380 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
381 #else
382 const char* compiler_name = "";
383 #endif // compilers
384 #endif // TIERED
386 if (*compiler_name != '\0' &&
387 (Arguments::mode() != Arguments::_int)) {
388 PUTPROP(props, "sun.management.compiler", compiler_name);
389 }
390 }
392 return properties;
393 JVM_END
396 /*
397 * Return the temporary directory that the VM uses for the attach
398 * and perf data files.
399 *
400 * It is important that this directory is well-known and the
401 * same for all VM instances. It cannot be affected by configuration
402 * variables such as java.io.tmpdir.
403 */
404 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
405 JVMWrapper("JVM_GetTemporaryDirectory");
406 HandleMark hm(THREAD);
407 const char* temp_dir = os::get_temp_directory();
408 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
409 return (jstring) JNIHandles::make_local(env, h());
410 JVM_END
413 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
415 extern volatile jint vm_created;
417 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
418 if (vm_created != 0 && (code == 0)) {
419 // The VM is about to exit. We call back into Java to check whether finalizers should be run
420 Universe::run_finalizers_on_exit();
421 }
422 before_exit(thread);
423 vm_exit(code);
424 JVM_END
427 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
428 before_exit(thread);
429 vm_exit(code);
430 JVM_END
433 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
434 register_on_exit_function(func);
435 JVM_END
438 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
439 JVMWrapper("JVM_GC");
440 if (!DisableExplicitGC) {
441 Universe::heap()->collect(GCCause::_java_lang_system_gc);
442 }
443 JVM_END
446 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
447 JVMWrapper("JVM_MaxObjectInspectionAge");
448 return Universe::heap()->millis_since_last_gc();
449 JVM_END
452 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
453 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
454 JVM_END
457 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
458 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
459 JVM_END
461 static inline jlong convert_size_t_to_jlong(size_t val) {
462 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
463 NOT_LP64 (return (jlong)val;)
464 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
465 }
467 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
468 JVMWrapper("JVM_TotalMemory");
469 size_t n = Universe::heap()->capacity();
470 return convert_size_t_to_jlong(n);
471 JVM_END
474 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
475 JVMWrapper("JVM_FreeMemory");
476 CollectedHeap* ch = Universe::heap();
477 size_t n;
478 {
479 MutexLocker x(Heap_lock);
480 n = ch->capacity() - ch->used();
481 }
482 return convert_size_t_to_jlong(n);
483 JVM_END
486 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
487 JVMWrapper("JVM_MaxMemory");
488 size_t n = Universe::heap()->max_capacity();
489 return convert_size_t_to_jlong(n);
490 JVM_END
493 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
494 JVMWrapper("JVM_ActiveProcessorCount");
495 return os::active_processor_count();
496 JVM_END
500 // java.lang.Throwable //////////////////////////////////////////////////////
503 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
504 JVMWrapper("JVM_FillInStackTrace");
505 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
506 java_lang_Throwable::fill_in_stack_trace(exception);
507 JVM_END
510 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
511 JVMWrapper("JVM_GetStackTraceDepth");
512 oop exception = JNIHandles::resolve(throwable);
513 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
514 JVM_END
517 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
518 JVMWrapper("JVM_GetStackTraceElement");
519 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
520 oop exception = JNIHandles::resolve(throwable);
521 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
522 return JNIHandles::make_local(env, element);
523 JVM_END
526 // java.lang.Object ///////////////////////////////////////////////
529 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
530 JVMWrapper("JVM_IHashCode");
531 // as implemented in the classic virtual machine; return 0 if object is NULL
532 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
533 JVM_END
536 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
537 JVMWrapper("JVM_MonitorWait");
538 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
539 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
540 if (JvmtiExport::should_post_monitor_wait()) {
541 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
543 // The current thread already owns the monitor and it has not yet
544 // been added to the wait queue so the current thread cannot be
545 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
546 // event handler cannot accidentally consume an unpark() meant for
547 // the ParkEvent associated with this ObjectMonitor.
548 }
549 ObjectSynchronizer::wait(obj, ms, CHECK);
550 JVM_END
553 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
554 JVMWrapper("JVM_MonitorNotify");
555 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
556 ObjectSynchronizer::notify(obj, CHECK);
557 JVM_END
560 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
561 JVMWrapper("JVM_MonitorNotifyAll");
562 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
563 ObjectSynchronizer::notifyall(obj, CHECK);
564 JVM_END
567 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
568 JVMWrapper("JVM_Clone");
569 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
570 const KlassHandle klass (THREAD, obj->klass());
571 JvmtiVMObjectAllocEventCollector oam;
573 #ifdef ASSERT
574 // Just checking that the cloneable flag is set correct
575 if (obj->is_array()) {
576 guarantee(klass->is_cloneable(), "all arrays are cloneable");
577 } else {
578 guarantee(obj->is_instance(), "should be instanceOop");
579 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
580 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
581 }
582 #endif
584 // Check if class of obj supports the Cloneable interface.
585 // All arrays are considered to be cloneable (See JLS 20.1.5)
586 if (!klass->is_cloneable()) {
587 ResourceMark rm(THREAD);
588 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
589 }
591 // Make shallow object copy
592 const int size = obj->size();
593 oop new_obj = NULL;
594 if (obj->is_array()) {
595 const int length = ((arrayOop)obj())->length();
596 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
597 } else {
598 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
599 }
600 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
601 // is modifying a reference field in the clonee, a non-oop-atomic copy might
602 // be suspended in the middle of copying the pointer and end up with parts
603 // of two different pointers in the field. Subsequent dereferences will crash.
604 // 4846409: an oop-copy of objects with long or double fields or arrays of same
605 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
606 // of oops. We know objects are aligned on a minimum of an jlong boundary.
607 // The same is true of StubRoutines::object_copy and the various oop_copy
608 // variants, and of the code generated by the inline_native_clone intrinsic.
609 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
610 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
611 (size_t)align_object_size(size) / HeapWordsPerLong);
612 // Clear the header
613 new_obj->init_mark();
615 // Store check (mark entire object and let gc sort it out)
616 BarrierSet* bs = Universe::heap()->barrier_set();
617 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
618 bs->write_region(MemRegion((HeapWord*)new_obj, size));
620 // Caution: this involves a java upcall, so the clone should be
621 // "gc-robust" by this stage.
622 if (klass->has_finalizer()) {
623 assert(obj->is_instance(), "should be instanceOop");
624 new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
625 }
627 return JNIHandles::make_local(env, oop(new_obj));
628 JVM_END
630 // java.lang.Compiler ////////////////////////////////////////////////////
632 // The initial cuts of the HotSpot VM will not support JITs, and all existing
633 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
634 // functions are all silently ignored unless JVM warnings are printed.
636 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
637 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
638 JVM_END
641 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
642 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
643 return JNI_FALSE;
644 JVM_END
647 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
648 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
649 return JNI_FALSE;
650 JVM_END
653 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
654 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
655 return JNI_FALSE;
656 JVM_END
659 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
660 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
661 return NULL;
662 JVM_END
665 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
666 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
667 JVM_END
670 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
671 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
672 JVM_END
676 // Error message support //////////////////////////////////////////////////////
678 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
679 JVMWrapper("JVM_GetLastErrorString");
680 return (jint)os::lasterror(buf, len);
681 JVM_END
684 // java.io.File ///////////////////////////////////////////////////////////////
686 JVM_LEAF(char*, JVM_NativePath(char* path))
687 JVMWrapper2("JVM_NativePath (%s)", path);
688 return os::native_path(path);
689 JVM_END
692 // Misc. class handling ///////////////////////////////////////////////////////////
695 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
696 JVMWrapper("JVM_GetCallerClass");
698 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or
699 // sun.reflect.Reflection.getCallerClass with a depth parameter is provided
700 // temporarily for existing code to use until a replacement API is defined.
701 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) {
702 Klass* k = thread->security_get_caller_class(depth);
703 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
704 }
706 // Getting the class of the caller frame.
707 //
708 // The call stack at this point looks something like this:
709 //
710 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
711 // [1] [ @CallerSensitive API.method ]
712 // [.] [ (skipped intermediate frames) ]
713 // [n] [ caller ]
714 vframeStream vfst(thread);
715 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
716 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
717 Method* m = vfst.method();
718 assert(m != NULL, "sanity");
719 switch (n) {
720 case 0:
721 // This must only be called from Reflection.getCallerClass
722 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
723 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
724 }
725 // fall-through
726 case 1:
727 // Frame 0 and 1 must be caller sensitive.
728 if (!m->caller_sensitive()) {
729 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
730 }
731 break;
732 default:
733 if (!m->is_ignored_by_security_stack_walk()) {
734 // We have reached the desired frame; return the holder class.
735 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
736 }
737 break;
738 }
739 }
740 return NULL;
741 JVM_END
744 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
745 JVMWrapper("JVM_FindPrimitiveClass");
746 oop mirror = NULL;
747 BasicType t = name2type(utf);
748 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
749 mirror = Universe::java_mirror(t);
750 }
751 if (mirror == NULL) {
752 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
753 } else {
754 return (jclass) JNIHandles::make_local(env, mirror);
755 }
756 JVM_END
759 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
760 JVMWrapper("JVM_ResolveClass");
761 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
762 JVM_END
765 // Returns a class loaded by the bootstrap class loader; or null
766 // if not found. ClassNotFoundException is not thrown.
767 //
768 // Rationale behind JVM_FindClassFromBootLoader
769 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
770 // b> because of (a) java.dll has a direct dependecy on the unexported
771 // private symbol "_JVM_FindClassFromClassLoader@20".
772 // c> the launcher cannot use the private symbol as it dynamically opens
773 // the entry point, so if something changes, the launcher will fail
774 // unexpectedly at runtime, it is safest for the launcher to dlopen a
775 // stable exported interface.
776 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
777 // signature to change from _JVM_FindClassFromClassLoader@20 to
778 // JVM_FindClassFromClassLoader and will not be backward compatible
779 // with older JDKs.
780 // Thus a public/stable exported entry point is the right solution,
781 // public here means public in linker semantics, and is exported only
782 // to the JDK, and is not intended to be a public API.
784 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
785 const char* name))
786 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
788 // Java libraries should ensure that name is never null...
789 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
790 // It's impossible to create this class; the name cannot fit
791 // into the constant pool.
792 return NULL;
793 }
795 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
796 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
797 if (k == NULL) {
798 return NULL;
799 }
801 if (TraceClassResolution) {
802 trace_class_resolution(k);
803 }
804 return (jclass) JNIHandles::make_local(env, k->java_mirror());
805 JVM_END
807 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
808 jboolean init, jobject loader,
809 jboolean throwError))
810 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
811 throwError ? "error" : "exception");
812 // Java libraries should ensure that name is never null...
813 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
814 // It's impossible to create this class; the name cannot fit
815 // into the constant pool.
816 if (throwError) {
817 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
818 } else {
819 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
820 }
821 }
822 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
823 Handle h_loader(THREAD, JNIHandles::resolve(loader));
824 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
825 Handle(), throwError, THREAD);
827 if (TraceClassResolution && result != NULL) {
828 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
829 }
830 return result;
831 JVM_END
834 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
835 jboolean init, jclass from))
836 JVMWrapper2("JVM_FindClassFromClass %s", name);
837 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
838 // It's impossible to create this class; the name cannot fit
839 // into the constant pool.
840 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
841 }
842 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
843 oop from_class_oop = JNIHandles::resolve(from);
844 Klass* from_class = (from_class_oop == NULL)
845 ? (Klass*)NULL
846 : java_lang_Class::as_Klass(from_class_oop);
847 oop class_loader = NULL;
848 oop protection_domain = NULL;
849 if (from_class != NULL) {
850 class_loader = from_class->class_loader();
851 protection_domain = from_class->protection_domain();
852 }
853 Handle h_loader(THREAD, class_loader);
854 Handle h_prot (THREAD, protection_domain);
855 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
856 h_prot, true, thread);
858 if (TraceClassResolution && result != NULL) {
859 // this function is generally only used for class loading during verification.
860 ResourceMark rm;
861 oop from_mirror = JNIHandles::resolve_non_null(from);
862 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
863 const char * from_name = from_class->external_name();
865 oop mirror = JNIHandles::resolve_non_null(result);
866 Klass* to_class = java_lang_Class::as_Klass(mirror);
867 const char * to = to_class->external_name();
868 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
869 }
871 return result;
872 JVM_END
874 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
875 if (loader.is_null()) {
876 return;
877 }
879 // check whether the current caller thread holds the lock or not.
880 // If not, increment the corresponding counter
881 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
882 ObjectSynchronizer::owner_self) {
883 counter->inc();
884 }
885 }
887 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
888 // and JVM_DefineClassWithSourceCond()
889 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
890 jobject loader, const jbyte *buf,
891 jsize len, jobject pd, const char *source,
892 jboolean verify, TRAPS) {
893 if (source == NULL) source = "__JVM_DefineClass__";
895 assert(THREAD->is_Java_thread(), "must be a JavaThread");
896 JavaThread* jt = (JavaThread*) THREAD;
898 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
899 ClassLoader::perf_define_appclass_selftime(),
900 ClassLoader::perf_define_appclasses(),
901 jt->get_thread_stat()->perf_recursion_counts_addr(),
902 jt->get_thread_stat()->perf_timers_addr(),
903 PerfClassTraceTime::DEFINE_CLASS);
905 if (UsePerfData) {
906 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
907 }
909 // Since exceptions can be thrown, class initialization can take place
910 // if name is NULL no check for class name in .class stream has to be made.
911 TempNewSymbol class_name = NULL;
912 if (name != NULL) {
913 const int str_len = (int)strlen(name);
914 if (str_len > Symbol::max_length()) {
915 // It's impossible to create this class; the name cannot fit
916 // into the constant pool.
917 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
918 }
919 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
920 }
922 ResourceMark rm(THREAD);
923 ClassFileStream st((u1*) buf, len, (char *)source);
924 Handle class_loader (THREAD, JNIHandles::resolve(loader));
925 if (UsePerfData) {
926 is_lock_held_by_thread(class_loader,
927 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
928 THREAD);
929 }
930 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
931 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
932 protection_domain, &st,
933 verify != 0,
934 CHECK_NULL);
936 if (TraceClassResolution && k != NULL) {
937 trace_class_resolution(k);
938 }
940 return (jclass) JNIHandles::make_local(env, k->java_mirror());
941 }
944 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
945 JVMWrapper2("JVM_DefineClass %s", name);
947 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
948 JVM_END
951 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
952 JVMWrapper2("JVM_DefineClassWithSource %s", name);
954 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
955 JVM_END
957 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
958 jobject loader, const jbyte *buf,
959 jsize len, jobject pd,
960 const char *source, jboolean verify))
961 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
963 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
964 JVM_END
966 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
967 JVMWrapper("JVM_FindLoadedClass");
968 ResourceMark rm(THREAD);
970 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
971 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
973 const char* str = java_lang_String::as_utf8_string(string());
974 // Sanity check, don't expect null
975 if (str == NULL) return NULL;
977 const int str_len = (int)strlen(str);
978 if (str_len > Symbol::max_length()) {
979 // It's impossible to create this class; the name cannot fit
980 // into the constant pool.
981 return NULL;
982 }
983 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
985 // Security Note:
986 // The Java level wrapper will perform the necessary security check allowing
987 // us to pass the NULL as the initiating class loader.
988 Handle h_loader(THREAD, JNIHandles::resolve(loader));
989 if (UsePerfData) {
990 is_lock_held_by_thread(h_loader,
991 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
992 THREAD);
993 }
995 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
996 h_loader,
997 Handle(),
998 CHECK_NULL);
1000 return (k == NULL) ? NULL :
1001 (jclass) JNIHandles::make_local(env, k->java_mirror());
1002 JVM_END
1005 // Reflection support //////////////////////////////////////////////////////////////////////////////
1007 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
1008 assert (cls != NULL, "illegal class");
1009 JVMWrapper("JVM_GetClassName");
1010 JvmtiVMObjectAllocEventCollector oam;
1011 ResourceMark rm(THREAD);
1012 const char* name;
1013 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1014 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
1015 } else {
1016 // Consider caching interned string in Klass
1017 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1018 assert(k->is_klass(), "just checking");
1019 name = k->external_name();
1020 }
1021 oop result = StringTable::intern((char*) name, CHECK_NULL);
1022 return (jstring) JNIHandles::make_local(env, result);
1023 JVM_END
1026 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1027 JVMWrapper("JVM_GetClassInterfaces");
1028 JvmtiVMObjectAllocEventCollector oam;
1029 oop mirror = JNIHandles::resolve_non_null(cls);
1031 // Special handling for primitive objects
1032 if (java_lang_Class::is_primitive(mirror)) {
1033 // Primitive objects does not have any interfaces
1034 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1035 return (jobjectArray) JNIHandles::make_local(env, r);
1036 }
1038 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
1039 // Figure size of result array
1040 int size;
1041 if (klass->oop_is_instance()) {
1042 size = InstanceKlass::cast(klass())->local_interfaces()->length();
1043 } else {
1044 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
1045 size = 2;
1046 }
1048 // Allocate result array
1049 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1050 objArrayHandle result (THREAD, r);
1051 // Fill in result
1052 if (klass->oop_is_instance()) {
1053 // Regular instance klass, fill in all local interfaces
1054 for (int index = 0; index < size; index++) {
1055 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
1056 result->obj_at_put(index, k->java_mirror());
1057 }
1058 } else {
1059 // All arrays implement java.lang.Cloneable and java.io.Serializable
1060 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1061 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1062 }
1063 return (jobjectArray) JNIHandles::make_local(env, result());
1064 JVM_END
1067 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
1068 JVMWrapper("JVM_GetClassLoader");
1069 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1070 return NULL;
1071 }
1072 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1073 oop loader = k->class_loader();
1074 return JNIHandles::make_local(env, loader);
1075 JVM_END
1078 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1079 JVMWrapper("JVM_IsInterface");
1080 oop mirror = JNIHandles::resolve_non_null(cls);
1081 if (java_lang_Class::is_primitive(mirror)) {
1082 return JNI_FALSE;
1083 }
1084 Klass* k = java_lang_Class::as_Klass(mirror);
1085 jboolean result = k->is_interface();
1086 assert(!result || k->oop_is_instance(),
1087 "all interfaces are instance types");
1088 // The compiler intrinsic for isInterface tests the
1089 // Klass::_access_flags bits in the same way.
1090 return result;
1091 JVM_END
1094 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1095 JVMWrapper("JVM_GetClassSigners");
1096 JvmtiVMObjectAllocEventCollector oam;
1097 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1098 // There are no signers for primitive types
1099 return NULL;
1100 }
1102 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1104 // If there are no signers set in the class, or if the class
1105 // is an array, return NULL.
1106 if (signers == NULL) return NULL;
1108 // copy of the signers array
1109 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1110 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1111 for (int index = 0; index < signers->length(); index++) {
1112 signers_copy->obj_at_put(index, signers->obj_at(index));
1113 }
1115 // return the copy
1116 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1117 JVM_END
1120 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1121 JVMWrapper("JVM_SetClassSigners");
1122 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1123 // This call is ignored for primitive types and arrays.
1124 // Signers are only set once, ClassLoader.java, and thus shouldn't
1125 // be called with an array. Only the bootstrap loader creates arrays.
1126 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1127 if (k->oop_is_instance()) {
1128 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1129 }
1130 }
1131 JVM_END
1134 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1135 JVMWrapper("JVM_GetProtectionDomain");
1136 if (JNIHandles::resolve(cls) == NULL) {
1137 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1138 }
1140 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1141 // Primitive types does not have a protection domain.
1142 return NULL;
1143 }
1145 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1146 return (jobject) JNIHandles::make_local(env, pd);
1147 JVM_END
1150 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1151 // If there is a security manager and protection domain, check the access
1152 // in the protection domain, otherwise it is authorized.
1153 if (java_lang_System::has_security_manager()) {
1155 // For bootstrapping, if pd implies method isn't in the JDK, allow
1156 // this context to revert to older behavior.
1157 // In this case the isAuthorized field in AccessControlContext is also not
1158 // present.
1159 if (Universe::protection_domain_implies_method() == NULL) {
1160 return true;
1161 }
1163 // Whitelist certain access control contexts
1164 if (java_security_AccessControlContext::is_authorized(context)) {
1165 return true;
1166 }
1168 oop prot = klass->protection_domain();
1169 if (prot != NULL) {
1170 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1171 // in the new wrapper.
1172 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1173 Handle h_prot(THREAD, prot);
1174 JavaValue result(T_BOOLEAN);
1175 JavaCallArguments args(h_prot);
1176 JavaCalls::call(&result, m, &args, CHECK_false);
1177 return (result.get_jboolean() != 0);
1178 }
1179 }
1180 return true;
1181 }
1183 // Create an AccessControlContext with a protection domain with null codesource
1184 // and null permissions - which gives no permissions.
1185 oop create_dummy_access_control_context(TRAPS) {
1186 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass());
1187 // new ProtectionDomain(null,null);
1188 oop null_protection_domain = pd_klass->allocate_instance(CHECK_NULL);
1189 Handle null_pd(THREAD, null_protection_domain);
1191 // new ProtectionDomain[] {pd};
1192 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1193 context->obj_at_put(0, null_pd());
1195 // new AccessControlContext(new ProtectionDomain[] {pd})
1196 objArrayHandle h_context(THREAD, context);
1197 oop result = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1198 return result;
1199 }
1201 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1202 JVMWrapper("JVM_DoPrivileged");
1204 if (action == NULL) {
1205 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1206 }
1208 // Compute the frame initiating the do privileged operation and setup the privileged stack
1209 vframeStream vfst(thread);
1210 vfst.security_get_caller_frame(1);
1212 if (vfst.at_end()) {
1213 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1214 }
1216 Method* method = vfst.method();
1217 instanceKlassHandle klass (THREAD, method->method_holder());
1219 // Check that action object understands "Object run()"
1220 Handle h_context;
1221 if (context != NULL) {
1222 h_context = Handle(THREAD, JNIHandles::resolve(context));
1223 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1224 if (!authorized) {
1225 // Create an unprivileged access control object and call it's run function
1226 // instead.
1227 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1228 h_context = Handle(THREAD, noprivs);
1229 }
1230 }
1232 // Check that action object understands "Object run()"
1233 Handle object (THREAD, JNIHandles::resolve(action));
1235 // get run() method
1236 Method* m_oop = object->klass()->uncached_lookup_method(
1237 vmSymbols::run_method_name(),
1238 vmSymbols::void_object_signature(),
1239 Klass::normal);
1240 methodHandle m (THREAD, m_oop);
1241 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1242 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1243 }
1245 // Stack allocated list of privileged stack elements
1246 PrivilegedElement pi;
1247 if (!vfst.at_end()) {
1248 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1249 thread->set_privileged_stack_top(&pi);
1250 }
1253 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1254 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1255 Handle pending_exception;
1256 JavaValue result(T_OBJECT);
1257 JavaCallArguments args(object);
1258 JavaCalls::call(&result, m, &args, THREAD);
1260 // done with action, remove ourselves from the list
1261 if (!vfst.at_end()) {
1262 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1263 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1264 }
1266 if (HAS_PENDING_EXCEPTION) {
1267 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1268 CLEAR_PENDING_EXCEPTION;
1270 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1271 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1272 // Throw a java.security.PrivilegedActionException(Exception e) exception
1273 JavaCallArguments args(pending_exception);
1274 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1275 vmSymbols::exception_void_signature(),
1276 &args);
1277 }
1278 }
1280 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1281 return JNIHandles::make_local(env, (oop) result.get_jobject());
1282 JVM_END
1285 // Returns the inherited_access_control_context field of the running thread.
1286 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1287 JVMWrapper("JVM_GetInheritedAccessControlContext");
1288 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1289 return JNIHandles::make_local(env, result);
1290 JVM_END
1292 class RegisterArrayForGC {
1293 private:
1294 JavaThread *_thread;
1295 public:
1296 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1297 _thread = thread;
1298 _thread->register_array_for_gc(array);
1299 }
1301 ~RegisterArrayForGC() {
1302 _thread->register_array_for_gc(NULL);
1303 }
1304 };
1307 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1308 JVMWrapper("JVM_GetStackAccessControlContext");
1309 if (!UsePrivilegedStack) return NULL;
1311 ResourceMark rm(THREAD);
1312 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1313 JvmtiVMObjectAllocEventCollector oam;
1315 // count the protection domains on the execution stack. We collapse
1316 // duplicate consecutive protection domains into a single one, as
1317 // well as stopping when we hit a privileged frame.
1319 // Use vframeStream to iterate through Java frames
1320 vframeStream vfst(thread);
1322 oop previous_protection_domain = NULL;
1323 Handle privileged_context(thread, NULL);
1324 bool is_privileged = false;
1325 oop protection_domain = NULL;
1327 for(; !vfst.at_end(); vfst.next()) {
1328 // get method of frame
1329 Method* method = vfst.method();
1330 intptr_t* frame_id = vfst.frame_id();
1332 // check the privileged frames to see if we have a match
1333 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1334 // this frame is privileged
1335 is_privileged = true;
1336 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1337 protection_domain = thread->privileged_stack_top()->protection_domain();
1338 } else {
1339 protection_domain = method->method_holder()->protection_domain();
1340 }
1342 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1343 local_array->push(protection_domain);
1344 previous_protection_domain = protection_domain;
1345 }
1347 if (is_privileged) break;
1348 }
1351 // either all the domains on the stack were system domains, or
1352 // we had a privileged system domain
1353 if (local_array->is_empty()) {
1354 if (is_privileged && privileged_context.is_null()) return NULL;
1356 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1357 return JNIHandles::make_local(env, result);
1358 }
1360 // the resource area must be registered in case of a gc
1361 RegisterArrayForGC ragc(thread, local_array);
1362 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1363 local_array->length(), CHECK_NULL);
1364 objArrayHandle h_context(thread, context);
1365 for (int index = 0; index < local_array->length(); index++) {
1366 h_context->obj_at_put(index, local_array->at(index));
1367 }
1369 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1371 return JNIHandles::make_local(env, result);
1372 JVM_END
1375 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1376 JVMWrapper("JVM_IsArrayClass");
1377 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1378 return (k != NULL) && k->oop_is_array() ? true : false;
1379 JVM_END
1382 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1383 JVMWrapper("JVM_IsPrimitiveClass");
1384 oop mirror = JNIHandles::resolve_non_null(cls);
1385 return (jboolean) java_lang_Class::is_primitive(mirror);
1386 JVM_END
1389 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1390 JVMWrapper("JVM_GetComponentType");
1391 oop mirror = JNIHandles::resolve_non_null(cls);
1392 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1393 return (jclass) JNIHandles::make_local(env, result);
1394 JVM_END
1397 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1398 JVMWrapper("JVM_GetClassModifiers");
1399 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1400 // Primitive type
1401 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1402 }
1404 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1405 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1406 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1407 return k->modifier_flags();
1408 JVM_END
1411 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1413 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1414 JvmtiVMObjectAllocEventCollector oam;
1415 // ofClass is a reference to a java_lang_Class object. The mirror object
1416 // of an InstanceKlass
1418 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1419 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1420 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1421 return (jobjectArray)JNIHandles::make_local(env, result);
1422 }
1424 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1425 InnerClassesIterator iter(k);
1427 if (iter.length() == 0) {
1428 // Neither an inner nor outer class
1429 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1430 return (jobjectArray)JNIHandles::make_local(env, result);
1431 }
1433 // find inner class info
1434 constantPoolHandle cp(thread, k->constants());
1435 int length = iter.length();
1437 // Allocate temp. result array
1438 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1439 objArrayHandle result (THREAD, r);
1440 int members = 0;
1442 for (; !iter.done(); iter.next()) {
1443 int ioff = iter.inner_class_info_index();
1444 int ooff = iter.outer_class_info_index();
1446 if (ioff != 0 && ooff != 0) {
1447 // Check to see if the name matches the class we're looking for
1448 // before attempting to find the class.
1449 if (cp->klass_name_at_matches(k, ooff)) {
1450 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1451 if (outer_klass == k()) {
1452 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1453 instanceKlassHandle inner_klass (THREAD, ik);
1455 // Throws an exception if outer klass has not declared k as
1456 // an inner klass
1457 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1459 result->obj_at_put(members, inner_klass->java_mirror());
1460 members++;
1461 }
1462 }
1463 }
1464 }
1466 if (members != length) {
1467 // Return array of right length
1468 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1469 for(int i = 0; i < members; i++) {
1470 res->obj_at_put(i, result->obj_at(i));
1471 }
1472 return (jobjectArray)JNIHandles::make_local(env, res);
1473 }
1475 return (jobjectArray)JNIHandles::make_local(env, result());
1476 JVM_END
1479 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1480 {
1481 // ofClass is a reference to a java_lang_Class object.
1482 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1483 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1484 return NULL;
1485 }
1487 bool inner_is_member = false;
1488 Klass* outer_klass
1489 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1490 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1491 if (outer_klass == NULL) return NULL; // already a top-level class
1492 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1493 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1494 }
1495 JVM_END
1497 // should be in InstanceKlass.cpp, but is here for historical reasons
1498 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1499 bool* inner_is_member,
1500 TRAPS) {
1501 Thread* thread = THREAD;
1502 InnerClassesIterator iter(k);
1503 if (iter.length() == 0) {
1504 // No inner class info => no declaring class
1505 return NULL;
1506 }
1508 constantPoolHandle i_cp(thread, k->constants());
1510 bool found = false;
1511 Klass* ok;
1512 instanceKlassHandle outer_klass;
1513 *inner_is_member = false;
1515 // Find inner_klass attribute
1516 for (; !iter.done() && !found; iter.next()) {
1517 int ioff = iter.inner_class_info_index();
1518 int ooff = iter.outer_class_info_index();
1519 int noff = iter.inner_name_index();
1520 if (ioff != 0) {
1521 // Check to see if the name matches the class we're looking for
1522 // before attempting to find the class.
1523 if (i_cp->klass_name_at_matches(k, ioff)) {
1524 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1525 found = (k() == inner_klass);
1526 if (found && ooff != 0) {
1527 ok = i_cp->klass_at(ooff, CHECK_NULL);
1528 outer_klass = instanceKlassHandle(thread, ok);
1529 *inner_is_member = true;
1530 }
1531 }
1532 }
1533 }
1535 if (found && outer_klass.is_null()) {
1536 // It may be anonymous; try for that.
1537 int encl_method_class_idx = k->enclosing_method_class_index();
1538 if (encl_method_class_idx != 0) {
1539 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1540 outer_klass = instanceKlassHandle(thread, ok);
1541 *inner_is_member = false;
1542 }
1543 }
1545 // If no inner class attribute found for this class.
1546 if (outer_klass.is_null()) return NULL;
1548 // Throws an exception if outer klass has not declared k as an inner klass
1549 // We need evidence that each klass knows about the other, or else
1550 // the system could allow a spoof of an inner class to gain access rights.
1551 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1552 return outer_klass();
1553 }
1555 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1556 assert (cls != NULL, "illegal class");
1557 JVMWrapper("JVM_GetClassSignature");
1558 JvmtiVMObjectAllocEventCollector oam;
1559 ResourceMark rm(THREAD);
1560 // Return null for arrays and primatives
1561 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1562 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1563 if (k->oop_is_instance()) {
1564 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1565 if (sym == NULL) return NULL;
1566 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1567 return (jstring) JNIHandles::make_local(env, str());
1568 }
1569 }
1570 return NULL;
1571 JVM_END
1574 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1575 assert (cls != NULL, "illegal class");
1576 JVMWrapper("JVM_GetClassAnnotations");
1578 // Return null for arrays and primitives
1579 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1580 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1581 if (k->oop_is_instance()) {
1582 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1583 return (jbyteArray) JNIHandles::make_local(env, a);
1584 }
1585 }
1586 return NULL;
1587 JVM_END
1590 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1591 // some of this code was adapted from from jni_FromReflectedField
1593 oop reflected = JNIHandles::resolve_non_null(field);
1594 oop mirror = java_lang_reflect_Field::clazz(reflected);
1595 Klass* k = java_lang_Class::as_Klass(mirror);
1596 int slot = java_lang_reflect_Field::slot(reflected);
1597 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1599 KlassHandle kh(THREAD, k);
1600 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1602 if (modifiers & JVM_ACC_STATIC) {
1603 // for static fields we only look in the current class
1604 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1605 assert(false, "cannot find static field");
1606 return false;
1607 }
1608 } else {
1609 // for instance fields we start with the current class and work
1610 // our way up through the superclass chain
1611 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1612 assert(false, "cannot find instance field");
1613 return false;
1614 }
1615 }
1616 return true;
1617 }
1619 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1620 // field is a handle to a java.lang.reflect.Field object
1621 assert(field != NULL, "illegal field");
1622 JVMWrapper("JVM_GetFieldAnnotations");
1624 fieldDescriptor fd;
1625 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1626 if (!gotFd) {
1627 return NULL;
1628 }
1630 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1631 JVM_END
1634 static Method* jvm_get_method_common(jobject method) {
1635 // some of this code was adapted from from jni_FromReflectedMethod
1637 oop reflected = JNIHandles::resolve_non_null(method);
1638 oop mirror = NULL;
1639 int slot = 0;
1641 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1642 mirror = java_lang_reflect_Constructor::clazz(reflected);
1643 slot = java_lang_reflect_Constructor::slot(reflected);
1644 } else {
1645 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1646 "wrong type");
1647 mirror = java_lang_reflect_Method::clazz(reflected);
1648 slot = java_lang_reflect_Method::slot(reflected);
1649 }
1650 Klass* k = java_lang_Class::as_Klass(mirror);
1652 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1653 assert(m != NULL, "cannot find method");
1654 return m; // caller has to deal with NULL in product mode
1655 }
1658 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1659 JVMWrapper("JVM_GetMethodAnnotations");
1661 // method is a handle to a java.lang.reflect.Method object
1662 Method* m = jvm_get_method_common(method);
1663 if (m == NULL) {
1664 return NULL;
1665 }
1667 return (jbyteArray) JNIHandles::make_local(env,
1668 Annotations::make_java_array(m->annotations(), THREAD));
1669 JVM_END
1672 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1673 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1675 // method is a handle to a java.lang.reflect.Method object
1676 Method* m = jvm_get_method_common(method);
1677 if (m == NULL) {
1678 return NULL;
1679 }
1681 return (jbyteArray) JNIHandles::make_local(env,
1682 Annotations::make_java_array(m->annotation_default(), THREAD));
1683 JVM_END
1686 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1687 JVMWrapper("JVM_GetMethodParameterAnnotations");
1689 // method is a handle to a java.lang.reflect.Method object
1690 Method* m = jvm_get_method_common(method);
1691 if (m == NULL) {
1692 return NULL;
1693 }
1695 return (jbyteArray) JNIHandles::make_local(env,
1696 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1697 JVM_END
1699 /* Type use annotations support (JDK 1.8) */
1701 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1702 assert (cls != NULL, "illegal class");
1703 JVMWrapper("JVM_GetClassTypeAnnotations");
1704 ResourceMark rm(THREAD);
1705 // Return null for arrays and primitives
1706 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1707 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1708 if (k->oop_is_instance()) {
1709 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1710 if (type_annotations != NULL) {
1711 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1712 return (jbyteArray) JNIHandles::make_local(env, a);
1713 }
1714 }
1715 }
1716 return NULL;
1717 JVM_END
1719 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1720 assert (method != NULL, "illegal method");
1721 JVMWrapper("JVM_GetMethodTypeAnnotations");
1723 // method is a handle to a java.lang.reflect.Method object
1724 Method* m = jvm_get_method_common(method);
1725 if (m == NULL) {
1726 return NULL;
1727 }
1729 AnnotationArray* type_annotations = m->type_annotations();
1730 if (type_annotations != NULL) {
1731 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1732 return (jbyteArray) JNIHandles::make_local(env, a);
1733 }
1735 return NULL;
1736 JVM_END
1738 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1739 assert (field != NULL, "illegal field");
1740 JVMWrapper("JVM_GetFieldTypeAnnotations");
1742 fieldDescriptor fd;
1743 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1744 if (!gotFd) {
1745 return NULL;
1746 }
1748 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1749 JVM_END
1751 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1752 if (!cp->is_within_bounds(index)) {
1753 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1754 }
1755 }
1757 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1758 {
1759 JVMWrapper("JVM_GetMethodParameters");
1760 // method is a handle to a java.lang.reflect.Method object
1761 Method* method_ptr = jvm_get_method_common(method);
1762 methodHandle mh (THREAD, method_ptr);
1763 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1764 const int num_params = mh->method_parameters_length();
1766 if (0 != num_params) {
1767 // make sure all the symbols are properly formatted
1768 for (int i = 0; i < num_params; i++) {
1769 MethodParametersElement* params = mh->method_parameters_start();
1770 int index = params[i].name_cp_index;
1771 bounds_check(mh->constants(), index, CHECK_NULL);
1773 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1774 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1775 "Wrong type at constant pool index");
1776 }
1778 }
1780 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1781 objArrayHandle result (THREAD, result_oop);
1783 for (int i = 0; i < num_params; i++) {
1784 MethodParametersElement* params = mh->method_parameters_start();
1785 // For a 0 index, give a NULL symbol
1786 Symbol* sym = 0 != params[i].name_cp_index ?
1787 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1788 int flags = params[i].flags;
1789 oop param = Reflection::new_parameter(reflected_method, i, sym,
1790 flags, CHECK_NULL);
1791 result->obj_at_put(i, param);
1792 }
1793 return (jobjectArray)JNIHandles::make_local(env, result());
1794 } else {
1795 return (jobjectArray)NULL;
1796 }
1797 }
1798 JVM_END
1800 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1802 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1803 {
1804 JVMWrapper("JVM_GetClassDeclaredFields");
1805 JvmtiVMObjectAllocEventCollector oam;
1807 // Exclude primitive types and array types
1808 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1809 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1810 // Return empty array
1811 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1812 return (jobjectArray) JNIHandles::make_local(env, res);
1813 }
1815 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1816 constantPoolHandle cp(THREAD, k->constants());
1818 // Ensure class is linked
1819 k->link_class(CHECK_NULL);
1821 // 4496456 We need to filter out java.lang.Throwable.backtrace
1822 bool skip_backtrace = false;
1824 // Allocate result
1825 int num_fields;
1827 if (publicOnly) {
1828 num_fields = 0;
1829 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1830 if (fs.access_flags().is_public()) ++num_fields;
1831 }
1832 } else {
1833 num_fields = k->java_fields_count();
1835 if (k() == SystemDictionary::Throwable_klass()) {
1836 num_fields--;
1837 skip_backtrace = true;
1838 }
1839 }
1841 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1842 objArrayHandle result (THREAD, r);
1844 int out_idx = 0;
1845 fieldDescriptor fd;
1846 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1847 if (skip_backtrace) {
1848 // 4496456 skip java.lang.Throwable.backtrace
1849 int offset = fs.offset();
1850 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1851 }
1853 if (!publicOnly || fs.access_flags().is_public()) {
1854 fd.reinitialize(k(), fs.index());
1855 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1856 result->obj_at_put(out_idx, field);
1857 ++out_idx;
1858 }
1859 }
1860 assert(out_idx == num_fields, "just checking");
1861 return (jobjectArray) JNIHandles::make_local(env, result());
1862 }
1863 JVM_END
1865 static bool select_method(methodHandle method, bool want_constructor) {
1866 if (want_constructor) {
1867 return (method->is_initializer() && !method->is_static());
1868 } else {
1869 return (!method->is_initializer() && !method->is_overpass());
1870 }
1871 }
1873 static jobjectArray get_class_declared_methods_helper(
1874 JNIEnv *env,
1875 jclass ofClass, jboolean publicOnly,
1876 bool want_constructor,
1877 Klass* klass, TRAPS) {
1879 JvmtiVMObjectAllocEventCollector oam;
1881 // Exclude primitive types and array types
1882 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1883 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1884 // Return empty array
1885 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1886 return (jobjectArray) JNIHandles::make_local(env, res);
1887 }
1889 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1891 // Ensure class is linked
1892 k->link_class(CHECK_NULL);
1894 Array<Method*>* methods = k->methods();
1895 int methods_length = methods->length();
1897 // Save original method_idnum in case of redefinition, which can change
1898 // the idnum of obsolete methods. The new method will have the same idnum
1899 // but if we refresh the methods array, the counts will be wrong.
1900 ResourceMark rm(THREAD);
1901 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1902 int num_methods = 0;
1904 for (int i = 0; i < methods_length; i++) {
1905 methodHandle method(THREAD, methods->at(i));
1906 if (select_method(method, want_constructor)) {
1907 if (!publicOnly || method->is_public()) {
1908 idnums->push(method->method_idnum());
1909 ++num_methods;
1910 }
1911 }
1912 }
1914 // Allocate result
1915 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1916 objArrayHandle result (THREAD, r);
1918 // Now just put the methods that we selected above, but go by their idnum
1919 // in case of redefinition. The methods can be redefined at any safepoint,
1920 // so above when allocating the oop array and below when creating reflect
1921 // objects.
1922 for (int i = 0; i < num_methods; i++) {
1923 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1924 if (method.is_null()) {
1925 // Method may have been deleted and seems this API can handle null
1926 // Otherwise should probably put a method that throws NSME
1927 result->obj_at_put(i, NULL);
1928 } else {
1929 oop m;
1930 if (want_constructor) {
1931 m = Reflection::new_constructor(method, CHECK_NULL);
1932 } else {
1933 m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1934 }
1935 result->obj_at_put(i, m);
1936 }
1937 }
1939 return (jobjectArray) JNIHandles::make_local(env, result());
1940 }
1942 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1943 {
1944 JVMWrapper("JVM_GetClassDeclaredMethods");
1945 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1946 /*want_constructor*/ false,
1947 SystemDictionary::reflect_Method_klass(), THREAD);
1948 }
1949 JVM_END
1951 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1952 {
1953 JVMWrapper("JVM_GetClassDeclaredConstructors");
1954 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1955 /*want_constructor*/ true,
1956 SystemDictionary::reflect_Constructor_klass(), THREAD);
1957 }
1958 JVM_END
1960 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1961 {
1962 JVMWrapper("JVM_GetClassAccessFlags");
1963 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1964 // Primitive type
1965 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1966 }
1968 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1969 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1970 }
1971 JVM_END
1974 // Constant pool access //////////////////////////////////////////////////////////
1976 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1977 {
1978 JVMWrapper("JVM_GetClassConstantPool");
1979 JvmtiVMObjectAllocEventCollector oam;
1981 // Return null for primitives and arrays
1982 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1983 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1984 if (k->oop_is_instance()) {
1985 instanceKlassHandle k_h(THREAD, k);
1986 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1987 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1988 return JNIHandles::make_local(jcp());
1989 }
1990 }
1991 return NULL;
1992 }
1993 JVM_END
1996 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1997 {
1998 JVMWrapper("JVM_ConstantPoolGetSize");
1999 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2000 return cp->length();
2001 }
2002 JVM_END
2005 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2006 {
2007 JVMWrapper("JVM_ConstantPoolGetClassAt");
2008 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2009 bounds_check(cp, index, CHECK_NULL);
2010 constantTag tag = cp->tag_at(index);
2011 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2012 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2013 }
2014 Klass* k = cp->klass_at(index, CHECK_NULL);
2015 return (jclass) JNIHandles::make_local(k->java_mirror());
2016 }
2017 JVM_END
2019 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2020 {
2021 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
2022 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2023 bounds_check(cp, index, CHECK_NULL);
2024 constantTag tag = cp->tag_at(index);
2025 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2026 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2027 }
2028 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2029 if (k == NULL) return NULL;
2030 return (jclass) JNIHandles::make_local(k->java_mirror());
2031 }
2032 JVM_END
2034 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2035 constantTag tag = cp->tag_at(index);
2036 if (!tag.is_method() && !tag.is_interface_method()) {
2037 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2038 }
2039 int klass_ref = cp->uncached_klass_ref_index_at(index);
2040 Klass* k_o;
2041 if (force_resolution) {
2042 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2043 } else {
2044 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2045 if (k_o == NULL) return NULL;
2046 }
2047 instanceKlassHandle k(THREAD, k_o);
2048 Symbol* name = cp->uncached_name_ref_at(index);
2049 Symbol* sig = cp->uncached_signature_ref_at(index);
2050 methodHandle m (THREAD, k->find_method(name, sig));
2051 if (m.is_null()) {
2052 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2053 }
2054 oop method;
2055 if (!m->is_initializer() || m->is_static()) {
2056 method = Reflection::new_method(m, true, true, CHECK_NULL);
2057 } else {
2058 method = Reflection::new_constructor(m, CHECK_NULL);
2059 }
2060 return JNIHandles::make_local(method);
2061 }
2063 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2064 {
2065 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2066 JvmtiVMObjectAllocEventCollector oam;
2067 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2068 bounds_check(cp, index, CHECK_NULL);
2069 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2070 return res;
2071 }
2072 JVM_END
2074 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2075 {
2076 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2077 JvmtiVMObjectAllocEventCollector oam;
2078 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2079 bounds_check(cp, index, CHECK_NULL);
2080 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2081 return res;
2082 }
2083 JVM_END
2085 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2086 constantTag tag = cp->tag_at(index);
2087 if (!tag.is_field()) {
2088 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2089 }
2090 int klass_ref = cp->uncached_klass_ref_index_at(index);
2091 Klass* k_o;
2092 if (force_resolution) {
2093 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2094 } else {
2095 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2096 if (k_o == NULL) return NULL;
2097 }
2098 instanceKlassHandle k(THREAD, k_o);
2099 Symbol* name = cp->uncached_name_ref_at(index);
2100 Symbol* sig = cp->uncached_signature_ref_at(index);
2101 fieldDescriptor fd;
2102 Klass* target_klass = k->find_field(name, sig, &fd);
2103 if (target_klass == NULL) {
2104 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2105 }
2106 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
2107 return JNIHandles::make_local(field);
2108 }
2110 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2111 {
2112 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2113 JvmtiVMObjectAllocEventCollector oam;
2114 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2115 bounds_check(cp, index, CHECK_NULL);
2116 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2117 return res;
2118 }
2119 JVM_END
2121 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2122 {
2123 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2124 JvmtiVMObjectAllocEventCollector oam;
2125 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2126 bounds_check(cp, index, CHECK_NULL);
2127 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2128 return res;
2129 }
2130 JVM_END
2132 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2133 {
2134 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2135 JvmtiVMObjectAllocEventCollector oam;
2136 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2137 bounds_check(cp, index, CHECK_NULL);
2138 constantTag tag = cp->tag_at(index);
2139 if (!tag.is_field_or_method()) {
2140 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2141 }
2142 int klass_ref = cp->uncached_klass_ref_index_at(index);
2143 Symbol* klass_name = cp->klass_name_at(klass_ref);
2144 Symbol* member_name = cp->uncached_name_ref_at(index);
2145 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2146 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2147 objArrayHandle dest(THREAD, dest_o);
2148 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2149 dest->obj_at_put(0, str());
2150 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2151 dest->obj_at_put(1, str());
2152 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2153 dest->obj_at_put(2, str());
2154 return (jobjectArray) JNIHandles::make_local(dest());
2155 }
2156 JVM_END
2158 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2159 {
2160 JVMWrapper("JVM_ConstantPoolGetIntAt");
2161 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2162 bounds_check(cp, index, CHECK_0);
2163 constantTag tag = cp->tag_at(index);
2164 if (!tag.is_int()) {
2165 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2166 }
2167 return cp->int_at(index);
2168 }
2169 JVM_END
2171 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2172 {
2173 JVMWrapper("JVM_ConstantPoolGetLongAt");
2174 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2175 bounds_check(cp, index, CHECK_(0L));
2176 constantTag tag = cp->tag_at(index);
2177 if (!tag.is_long()) {
2178 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2179 }
2180 return cp->long_at(index);
2181 }
2182 JVM_END
2184 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2185 {
2186 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2187 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2188 bounds_check(cp, index, CHECK_(0.0f));
2189 constantTag tag = cp->tag_at(index);
2190 if (!tag.is_float()) {
2191 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2192 }
2193 return cp->float_at(index);
2194 }
2195 JVM_END
2197 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2198 {
2199 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2200 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2201 bounds_check(cp, index, CHECK_(0.0));
2202 constantTag tag = cp->tag_at(index);
2203 if (!tag.is_double()) {
2204 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2205 }
2206 return cp->double_at(index);
2207 }
2208 JVM_END
2210 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2211 {
2212 JVMWrapper("JVM_ConstantPoolGetStringAt");
2213 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2214 bounds_check(cp, index, CHECK_NULL);
2215 constantTag tag = cp->tag_at(index);
2216 if (!tag.is_string()) {
2217 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2218 }
2219 oop str = cp->string_at(index, CHECK_NULL);
2220 return (jstring) JNIHandles::make_local(str);
2221 }
2222 JVM_END
2224 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2225 {
2226 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2227 JvmtiVMObjectAllocEventCollector oam;
2228 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2229 bounds_check(cp, index, CHECK_NULL);
2230 constantTag tag = cp->tag_at(index);
2231 if (!tag.is_symbol()) {
2232 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2233 }
2234 Symbol* sym = cp->symbol_at(index);
2235 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2236 return (jstring) JNIHandles::make_local(str());
2237 }
2238 JVM_END
2241 // Assertion support. //////////////////////////////////////////////////////////
2243 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2244 JVMWrapper("JVM_DesiredAssertionStatus");
2245 assert(cls != NULL, "bad class");
2247 oop r = JNIHandles::resolve(cls);
2248 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2249 if (java_lang_Class::is_primitive(r)) return false;
2251 Klass* k = java_lang_Class::as_Klass(r);
2252 assert(k->oop_is_instance(), "must be an instance klass");
2253 if (! k->oop_is_instance()) return false;
2255 ResourceMark rm(THREAD);
2256 const char* name = k->name()->as_C_string();
2257 bool system_class = k->class_loader() == NULL;
2258 return JavaAssertions::enabled(name, system_class);
2260 JVM_END
2263 // Return a new AssertionStatusDirectives object with the fields filled in with
2264 // command-line assertion arguments (i.e., -ea, -da).
2265 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2266 JVMWrapper("JVM_AssertionStatusDirectives");
2267 JvmtiVMObjectAllocEventCollector oam;
2268 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2269 return JNIHandles::make_local(env, asd);
2270 JVM_END
2272 // Verification ////////////////////////////////////////////////////////////////////////////////
2274 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2276 // RedefineClasses support: bug 6214132 caused verification to fail.
2277 // All functions from this section should call the jvmtiThreadSate function:
2278 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2279 // The function returns a Klass* of the _scratch_class if the verifier
2280 // was invoked in the middle of the class redefinition.
2281 // Otherwise it returns its argument value which is the _the_class Klass*.
2282 // Please, refer to the description in the jvmtiThreadSate.hpp.
2284 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2285 JVMWrapper("JVM_GetClassNameUTF");
2286 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2287 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2288 return k->name()->as_utf8();
2289 JVM_END
2292 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2293 JVMWrapper("JVM_GetClassCPTypes");
2294 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2295 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2296 // types will have length zero if this is not an InstanceKlass
2297 // (length is determined by call to JVM_GetClassCPEntriesCount)
2298 if (k->oop_is_instance()) {
2299 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2300 for (int index = cp->length() - 1; index >= 0; index--) {
2301 constantTag tag = cp->tag_at(index);
2302 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2303 }
2304 }
2305 JVM_END
2308 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2309 JVMWrapper("JVM_GetClassCPEntriesCount");
2310 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2311 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2312 if (!k->oop_is_instance())
2313 return 0;
2314 return InstanceKlass::cast(k)->constants()->length();
2315 JVM_END
2318 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2319 JVMWrapper("JVM_GetClassFieldsCount");
2320 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2321 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2322 if (!k->oop_is_instance())
2323 return 0;
2324 return InstanceKlass::cast(k)->java_fields_count();
2325 JVM_END
2328 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2329 JVMWrapper("JVM_GetClassMethodsCount");
2330 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2331 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2332 if (!k->oop_is_instance())
2333 return 0;
2334 return InstanceKlass::cast(k)->methods()->length();
2335 JVM_END
2338 // The following methods, used for the verifier, are never called with
2339 // array klasses, so a direct cast to InstanceKlass is safe.
2340 // Typically, these methods are called in a loop with bounds determined
2341 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2342 // zero for arrays.
2343 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2344 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2345 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2346 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2347 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2348 int length = method->checked_exceptions_length();
2349 if (length > 0) {
2350 CheckedExceptionElement* table= method->checked_exceptions_start();
2351 for (int i = 0; i < length; i++) {
2352 exceptions[i] = table[i].class_cp_index;
2353 }
2354 }
2355 JVM_END
2358 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2359 JVMWrapper("JVM_GetMethodIxExceptionsCount");
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->checked_exceptions_length();
2364 JVM_END
2367 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2368 JVMWrapper("JVM_GetMethodIxByteCode");
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 memcpy(code, method->code_base(), method->code_size());
2373 JVM_END
2376 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2377 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2378 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2379 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2380 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2381 return method->code_size();
2382 JVM_END
2385 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2386 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2387 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2388 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2389 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2390 ExceptionTable extable(method);
2391 entry->start_pc = extable.start_pc(entry_index);
2392 entry->end_pc = extable.end_pc(entry_index);
2393 entry->handler_pc = extable.handler_pc(entry_index);
2394 entry->catchType = extable.catch_type_index(entry_index);
2395 JVM_END
2398 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2399 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2400 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2401 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2402 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2403 return method->exception_table_length();
2404 JVM_END
2407 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2408 JVMWrapper("JVM_GetMethodIxModifiers");
2409 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2410 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2411 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2412 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2413 JVM_END
2416 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2417 JVMWrapper("JVM_GetFieldIxModifiers");
2418 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2419 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2420 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2421 JVM_END
2424 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2425 JVMWrapper("JVM_GetMethodIxLocalsCount");
2426 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2427 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2428 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2429 return method->max_locals();
2430 JVM_END
2433 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2434 JVMWrapper("JVM_GetMethodIxArgsSize");
2435 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2436 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2437 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2438 return method->size_of_parameters();
2439 JVM_END
2442 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2443 JVMWrapper("JVM_GetMethodIxMaxStack");
2444 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2445 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2446 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2447 return method->verifier_max_stack();
2448 JVM_END
2451 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2452 JVMWrapper("JVM_IsConstructorIx");
2453 ResourceMark rm(THREAD);
2454 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2455 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2456 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2457 return method->name() == vmSymbols::object_initializer_name();
2458 JVM_END
2461 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2462 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2463 ResourceMark rm(THREAD);
2464 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2465 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2466 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2467 return method->is_overpass();
2468 JVM_END
2470 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2471 JVMWrapper("JVM_GetMethodIxIxUTF");
2472 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2473 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2474 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2475 return method->name()->as_utf8();
2476 JVM_END
2479 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2480 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2481 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2482 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2483 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2484 return method->signature()->as_utf8();
2485 JVM_END
2487 /**
2488 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2489 * read entries in the constant pool. Since the old verifier always
2490 * works on a copy of the code, it will not see any rewriting that
2491 * may possibly occur in the middle of verification. So it is important
2492 * that nothing it calls tries to use the cpCache instead of the raw
2493 * constant pool, so we must use cp->uncached_x methods when appropriate.
2494 */
2495 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2496 JVMWrapper("JVM_GetCPFieldNameUTF");
2497 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2498 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2499 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2500 switch (cp->tag_at(cp_index).value()) {
2501 case JVM_CONSTANT_Fieldref:
2502 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2503 default:
2504 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2505 }
2506 ShouldNotReachHere();
2507 return NULL;
2508 JVM_END
2511 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2512 JVMWrapper("JVM_GetCPMethodNameUTF");
2513 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2514 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2515 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2516 switch (cp->tag_at(cp_index).value()) {
2517 case JVM_CONSTANT_InterfaceMethodref:
2518 case JVM_CONSTANT_Methodref:
2519 case JVM_CONSTANT_NameAndType: // for invokedynamic
2520 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2521 default:
2522 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2523 }
2524 ShouldNotReachHere();
2525 return NULL;
2526 JVM_END
2529 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2530 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2531 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2532 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2533 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2534 switch (cp->tag_at(cp_index).value()) {
2535 case JVM_CONSTANT_InterfaceMethodref:
2536 case JVM_CONSTANT_Methodref:
2537 case JVM_CONSTANT_NameAndType: // for invokedynamic
2538 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2539 default:
2540 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2541 }
2542 ShouldNotReachHere();
2543 return NULL;
2544 JVM_END
2547 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2548 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2549 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2550 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2551 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2552 switch (cp->tag_at(cp_index).value()) {
2553 case JVM_CONSTANT_Fieldref:
2554 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2555 default:
2556 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2557 }
2558 ShouldNotReachHere();
2559 return NULL;
2560 JVM_END
2563 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2564 JVMWrapper("JVM_GetCPClassNameUTF");
2565 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2566 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2567 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2568 Symbol* classname = cp->klass_name_at(cp_index);
2569 return classname->as_utf8();
2570 JVM_END
2573 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2574 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2575 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2576 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2577 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2578 switch (cp->tag_at(cp_index).value()) {
2579 case JVM_CONSTANT_Fieldref: {
2580 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2581 Symbol* classname = cp->klass_name_at(class_index);
2582 return classname->as_utf8();
2583 }
2584 default:
2585 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2586 }
2587 ShouldNotReachHere();
2588 return NULL;
2589 JVM_END
2592 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2593 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2594 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2595 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2596 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2597 switch (cp->tag_at(cp_index).value()) {
2598 case JVM_CONSTANT_Methodref:
2599 case JVM_CONSTANT_InterfaceMethodref: {
2600 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2601 Symbol* classname = cp->klass_name_at(class_index);
2602 return classname->as_utf8();
2603 }
2604 default:
2605 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2606 }
2607 ShouldNotReachHere();
2608 return NULL;
2609 JVM_END
2612 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2613 JVMWrapper("JVM_GetCPFieldModifiers");
2614 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2615 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2616 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2617 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2618 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2619 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2620 switch (cp->tag_at(cp_index).value()) {
2621 case JVM_CONSTANT_Fieldref: {
2622 Symbol* name = cp->uncached_name_ref_at(cp_index);
2623 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2624 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2625 if (fs.name() == name && fs.signature() == signature) {
2626 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2627 }
2628 }
2629 return -1;
2630 }
2631 default:
2632 fatal("JVM_GetCPFieldModifiers: illegal constant");
2633 }
2634 ShouldNotReachHere();
2635 return 0;
2636 JVM_END
2639 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2640 JVMWrapper("JVM_GetCPMethodModifiers");
2641 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2642 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2643 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2644 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2645 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2646 switch (cp->tag_at(cp_index).value()) {
2647 case JVM_CONSTANT_Methodref:
2648 case JVM_CONSTANT_InterfaceMethodref: {
2649 Symbol* name = cp->uncached_name_ref_at(cp_index);
2650 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2651 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2652 int methods_count = methods->length();
2653 for (int i = 0; i < methods_count; i++) {
2654 Method* method = methods->at(i);
2655 if (method->name() == name && method->signature() == signature) {
2656 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2657 }
2658 }
2659 return -1;
2660 }
2661 default:
2662 fatal("JVM_GetCPMethodModifiers: illegal constant");
2663 }
2664 ShouldNotReachHere();
2665 return 0;
2666 JVM_END
2669 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2671 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2672 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2673 JVM_END
2676 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2677 JVMWrapper("JVM_IsSameClassPackage");
2678 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2679 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2680 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2681 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2682 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2683 JVM_END
2686 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2688 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2689 JVMWrapper2("JVM_Open (%s)", fname);
2691 //%note jvm_r6
2692 int result = os::open(fname, flags, mode);
2693 if (result >= 0) {
2694 return result;
2695 } else {
2696 switch(errno) {
2697 case EEXIST:
2698 return JVM_EEXIST;
2699 default:
2700 return -1;
2701 }
2702 }
2703 JVM_END
2706 JVM_LEAF(jint, JVM_Close(jint fd))
2707 JVMWrapper2("JVM_Close (0x%x)", fd);
2708 //%note jvm_r6
2709 return os::close(fd);
2710 JVM_END
2713 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2714 JVMWrapper2("JVM_Read (0x%x)", fd);
2716 //%note jvm_r6
2717 return (jint)os::restartable_read(fd, buf, nbytes);
2718 JVM_END
2721 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2722 JVMWrapper2("JVM_Write (0x%x)", fd);
2724 //%note jvm_r6
2725 return (jint)os::write(fd, buf, nbytes);
2726 JVM_END
2729 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2730 JVMWrapper2("JVM_Available (0x%x)", fd);
2731 //%note jvm_r6
2732 return os::available(fd, pbytes);
2733 JVM_END
2736 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2737 JVMWrapper4("JVM_Lseek (0x%x, " INT64_FORMAT ", %d)", fd, (int64_t) offset, whence);
2738 //%note jvm_r6
2739 return os::lseek(fd, offset, whence);
2740 JVM_END
2743 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2744 JVMWrapper3("JVM_SetLength (0x%x, " INT64_FORMAT ")", fd, (int64_t) length);
2745 return os::ftruncate(fd, length);
2746 JVM_END
2749 JVM_LEAF(jint, JVM_Sync(jint fd))
2750 JVMWrapper2("JVM_Sync (0x%x)", fd);
2751 //%note jvm_r6
2752 return os::fsync(fd);
2753 JVM_END
2756 // Printing support //////////////////////////////////////////////////
2757 extern "C" {
2759 ATTRIBUTE_PRINTF(3, 0)
2760 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2761 // see bug 4399518, 4417214
2762 if ((intptr_t)count <= 0) return -1;
2763 return vsnprintf(str, count, fmt, args);
2764 }
2766 ATTRIBUTE_PRINTF(3, 0)
2767 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2768 va_list args;
2769 int len;
2770 va_start(args, fmt);
2771 len = jio_vsnprintf(str, count, fmt, args);
2772 va_end(args);
2773 return len;
2774 }
2776 ATTRIBUTE_PRINTF(2,3)
2777 int jio_fprintf(FILE* f, const char *fmt, ...) {
2778 int len;
2779 va_list args;
2780 va_start(args, fmt);
2781 len = jio_vfprintf(f, fmt, args);
2782 va_end(args);
2783 return len;
2784 }
2786 ATTRIBUTE_PRINTF(2, 0)
2787 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2788 if (Arguments::vfprintf_hook() != NULL) {
2789 return Arguments::vfprintf_hook()(f, fmt, args);
2790 } else {
2791 return vfprintf(f, fmt, args);
2792 }
2793 }
2795 ATTRIBUTE_PRINTF(1, 2)
2796 JNIEXPORT int jio_printf(const char *fmt, ...) {
2797 int len;
2798 va_list args;
2799 va_start(args, fmt);
2800 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2801 va_end(args);
2802 return len;
2803 }
2806 // HotSpot specific jio method
2807 void jio_print(const char* s) {
2808 // Try to make this function as atomic as possible.
2809 if (Arguments::vfprintf_hook() != NULL) {
2810 jio_fprintf(defaultStream::output_stream(), "%s", s);
2811 } else {
2812 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2813 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2814 }
2815 }
2817 } // Extern C
2819 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2821 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2822 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2823 // OSThread objects. The exception to this rule is when the target object is the thread
2824 // doing the operation, in which case we know that the thread won't exit until the
2825 // operation is done (all exits being voluntary). There are a few cases where it is
2826 // rather silly to do operations on yourself, like resuming yourself or asking whether
2827 // you are alive. While these can still happen, they are not subject to deadlocks if
2828 // the lock is held while the operation occurs (this is not the case for suspend, for
2829 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2830 // implementation is local to this file, we always lock Threads_lock for that one.
2832 static void thread_entry(JavaThread* thread, TRAPS) {
2833 HandleMark hm(THREAD);
2834 Handle obj(THREAD, thread->threadObj());
2835 JavaValue result(T_VOID);
2836 JavaCalls::call_virtual(&result,
2837 obj,
2838 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2839 vmSymbols::run_method_name(),
2840 vmSymbols::void_method_signature(),
2841 THREAD);
2842 }
2845 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2846 JVMWrapper("JVM_StartThread");
2847 JavaThread *native_thread = NULL;
2849 // We cannot hold the Threads_lock when we throw an exception,
2850 // due to rank ordering issues. Example: we might need to grab the
2851 // Heap_lock while we construct the exception.
2852 bool throw_illegal_thread_state = false;
2854 // We must release the Threads_lock before we can post a jvmti event
2855 // in Thread::start.
2856 {
2857 // Ensure that the C++ Thread and OSThread structures aren't freed before
2858 // we operate.
2859 MutexLocker mu(Threads_lock);
2861 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2862 // re-starting an already started thread, so we should usually find
2863 // that the JavaThread is null. However for a JNI attached thread
2864 // there is a small window between the Thread object being created
2865 // (with its JavaThread set) and the update to its threadStatus, so we
2866 // have to check for this
2867 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2868 throw_illegal_thread_state = true;
2869 } else {
2870 // We could also check the stillborn flag to see if this thread was already stopped, but
2871 // for historical reasons we let the thread detect that itself when it starts running
2873 jlong size =
2874 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2875 // Allocate the C++ Thread structure and create the native thread. The
2876 // stack size retrieved from java is signed, but the constructor takes
2877 // size_t (an unsigned type), so avoid passing negative values which would
2878 // result in really large stacks.
2879 size_t sz = size > 0 ? (size_t) size : 0;
2880 native_thread = new JavaThread(&thread_entry, sz);
2882 // At this point it may be possible that no osthread was created for the
2883 // JavaThread due to lack of memory. Check for this situation and throw
2884 // an exception if necessary. Eventually we may want to change this so
2885 // that we only grab the lock if the thread was created successfully -
2886 // then we can also do this check and throw the exception in the
2887 // JavaThread constructor.
2888 if (native_thread->osthread() != NULL) {
2889 // Note: the current thread is not being used within "prepare".
2890 native_thread->prepare(jthread);
2891 }
2892 }
2893 }
2895 if (throw_illegal_thread_state) {
2896 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2897 }
2899 assert(native_thread != NULL, "Starting null thread?");
2901 if (native_thread->osthread() == NULL) {
2902 // No one should hold a reference to the 'native_thread'.
2903 delete native_thread;
2904 if (JvmtiExport::should_post_resource_exhausted()) {
2905 JvmtiExport::post_resource_exhausted(
2906 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2907 "unable to create new native thread");
2908 }
2909 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2910 "unable to create new native thread");
2911 }
2913 Thread::start(native_thread);
2915 JVM_END
2917 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2918 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2919 // but is thought to be reliable and simple. In the case, where the receiver is the
2920 // same thread as the sender, no safepoint is needed.
2921 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2922 JVMWrapper("JVM_StopThread");
2924 oop java_throwable = JNIHandles::resolve(throwable);
2925 if (java_throwable == NULL) {
2926 THROW(vmSymbols::java_lang_NullPointerException());
2927 }
2928 oop java_thread = JNIHandles::resolve_non_null(jthread);
2929 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2930 Events::log_exception(JavaThread::current(),
2931 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2932 p2i(receiver), p2i((address)java_thread), p2i(throwable));
2933 // First check if thread is alive
2934 if (receiver != NULL) {
2935 // Check if exception is getting thrown at self (use oop equality, since the
2936 // target object might exit)
2937 if (java_thread == thread->threadObj()) {
2938 THROW_OOP(java_throwable);
2939 } else {
2940 // Enques a VM_Operation to stop all threads and then deliver the exception...
2941 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2942 }
2943 }
2944 else {
2945 // Either:
2946 // - target thread has not been started before being stopped, or
2947 // - target thread already terminated
2948 // We could read the threadStatus to determine which case it is
2949 // but that is overkill as it doesn't matter. We must set the
2950 // stillborn flag for the first case, and if the thread has already
2951 // exited setting this flag has no affect
2952 java_lang_Thread::set_stillborn(java_thread);
2953 }
2954 JVM_END
2957 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2958 JVMWrapper("JVM_IsThreadAlive");
2960 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2961 return java_lang_Thread::is_alive(thread_oop);
2962 JVM_END
2965 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2966 JVMWrapper("JVM_SuspendThread");
2967 oop java_thread = JNIHandles::resolve_non_null(jthread);
2968 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2970 if (receiver != NULL) {
2971 // thread has run and has not exited (still on threads list)
2973 {
2974 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2975 if (receiver->is_external_suspend()) {
2976 // Don't allow nested external suspend requests. We can't return
2977 // an error from this interface so just ignore the problem.
2978 return;
2979 }
2980 if (receiver->is_exiting()) { // thread is in the process of exiting
2981 return;
2982 }
2983 receiver->set_external_suspend();
2984 }
2986 // java_suspend() will catch threads in the process of exiting
2987 // and will ignore them.
2988 receiver->java_suspend();
2990 // It would be nice to have the following assertion in all the
2991 // time, but it is possible for a racing resume request to have
2992 // resumed this thread right after we suspended it. Temporarily
2993 // enable this assertion if you are chasing a different kind of
2994 // bug.
2995 //
2996 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2997 // receiver->is_being_ext_suspended(), "thread is not suspended");
2998 }
2999 JVM_END
3002 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
3003 JVMWrapper("JVM_ResumeThread");
3004 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
3005 // We need to *always* get the threads lock here, since this operation cannot be allowed during
3006 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
3007 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
3008 // looks at it.
3009 MutexLocker ml(Threads_lock);
3010 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3011 if (thr != NULL) {
3012 // the thread has run and is not in the process of exiting
3013 thr->java_resume();
3014 }
3015 JVM_END
3018 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3019 JVMWrapper("JVM_SetThreadPriority");
3020 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3021 MutexLocker ml(Threads_lock);
3022 oop java_thread = JNIHandles::resolve_non_null(jthread);
3023 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3024 JavaThread* thr = java_lang_Thread::thread(java_thread);
3025 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
3026 Thread::set_priority(thr, (ThreadPriority)prio);
3027 }
3028 JVM_END
3031 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3032 JVMWrapper("JVM_Yield");
3033 if (os::dont_yield()) return;
3034 #ifndef USDT2
3035 HS_DTRACE_PROBE0(hotspot, thread__yield);
3036 #else /* USDT2 */
3037 HOTSPOT_THREAD_YIELD();
3038 #endif /* USDT2 */
3039 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
3040 // Critical for similar threading behaviour
3041 if (ConvertYieldToSleep) {
3042 os::sleep(thread, MinSleepInterval, false);
3043 } else {
3044 os::yield();
3045 }
3046 JVM_END
3049 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3050 JVMWrapper("JVM_Sleep");
3052 if (millis < 0) {
3053 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3054 }
3056 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3057 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3058 }
3060 // Save current thread state and restore it at the end of this block.
3061 // And set new thread state to SLEEPING.
3062 JavaThreadSleepState jtss(thread);
3064 #ifndef USDT2
3065 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
3066 #else /* USDT2 */
3067 HOTSPOT_THREAD_SLEEP_BEGIN(
3068 millis);
3069 #endif /* USDT2 */
3071 EventThreadSleep event;
3073 if (millis == 0) {
3074 // When ConvertSleepToYield is on, this matches the classic VM implementation of
3075 // JVM_Sleep. Critical for similar threading behaviour (Win32)
3076 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3077 // for SOLARIS
3078 if (ConvertSleepToYield) {
3079 os::yield();
3080 } else {
3081 ThreadState old_state = thread->osthread()->get_state();
3082 thread->osthread()->set_state(SLEEPING);
3083 os::sleep(thread, MinSleepInterval, false);
3084 thread->osthread()->set_state(old_state);
3085 }
3086 } else {
3087 ThreadState old_state = thread->osthread()->get_state();
3088 thread->osthread()->set_state(SLEEPING);
3089 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3090 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3091 // us while we were sleeping. We do not overwrite those.
3092 if (!HAS_PENDING_EXCEPTION) {
3093 if (event.should_commit()) {
3094 event.set_time(millis);
3095 event.commit();
3096 }
3097 #ifndef USDT2
3098 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
3099 #else /* USDT2 */
3100 HOTSPOT_THREAD_SLEEP_END(
3101 1);
3102 #endif /* USDT2 */
3103 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3104 // to properly restore the thread state. That's likely wrong.
3105 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3106 }
3107 }
3108 thread->osthread()->set_state(old_state);
3109 }
3110 if (event.should_commit()) {
3111 event.set_time(millis);
3112 event.commit();
3113 }
3114 #ifndef USDT2
3115 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
3116 #else /* USDT2 */
3117 HOTSPOT_THREAD_SLEEP_END(
3118 0);
3119 #endif /* USDT2 */
3120 JVM_END
3122 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3123 JVMWrapper("JVM_CurrentThread");
3124 oop jthread = thread->threadObj();
3125 assert (thread != NULL, "no current thread!");
3126 return JNIHandles::make_local(env, jthread);
3127 JVM_END
3130 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3131 JVMWrapper("JVM_CountStackFrames");
3133 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3134 oop java_thread = JNIHandles::resolve_non_null(jthread);
3135 bool throw_illegal_thread_state = false;
3136 int count = 0;
3138 {
3139 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3140 // We need to re-resolve the java_thread, since a GC might have happened during the
3141 // acquire of the lock
3142 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3144 if (thr == NULL) {
3145 // do nothing
3146 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3147 // Check whether this java thread has been suspended already. If not, throws
3148 // IllegalThreadStateException. We defer to throw that exception until
3149 // Threads_lock is released since loading exception class has to leave VM.
3150 // The correct way to test a thread is actually suspended is
3151 // wait_for_ext_suspend_completion(), but we can't call that while holding
3152 // the Threads_lock. The above tests are sufficient for our purposes
3153 // provided the walkability of the stack is stable - which it isn't
3154 // 100% but close enough for most practical purposes.
3155 throw_illegal_thread_state = true;
3156 } else {
3157 // Count all java activation, i.e., number of vframes
3158 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3159 // Native frames are not counted
3160 if (!vfst.method()->is_native()) count++;
3161 }
3162 }
3163 }
3165 if (throw_illegal_thread_state) {
3166 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3167 "this thread is not suspended");
3168 }
3169 return count;
3170 JVM_END
3172 // Consider: A better way to implement JVM_Interrupt() is to acquire
3173 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3174 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3175 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3176 // outside the critical section. Threads_lock is hot so we want to minimize
3177 // the hold-time. A cleaner interface would be to decompose interrupt into
3178 // two steps. The 1st phase, performed under Threads_lock, would return
3179 // a closure that'd be invoked after Threads_lock was dropped.
3180 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3181 // admit spurious wakeups.
3183 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3184 JVMWrapper("JVM_Interrupt");
3186 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3187 oop java_thread = JNIHandles::resolve_non_null(jthread);
3188 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3189 // We need to re-resolve the java_thread, since a GC might have happened during the
3190 // acquire of the lock
3191 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3192 if (thr != NULL) {
3193 Thread::interrupt(thr);
3194 }
3195 JVM_END
3198 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3199 JVMWrapper("JVM_IsInterrupted");
3201 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3202 oop java_thread = JNIHandles::resolve_non_null(jthread);
3203 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3204 // We need to re-resolve the java_thread, since a GC might have happened during the
3205 // acquire of the lock
3206 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3207 if (thr == NULL) {
3208 return JNI_FALSE;
3209 } else {
3210 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3211 }
3212 JVM_END
3215 // Return true iff the current thread has locked the object passed in
3217 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3218 JVMWrapper("JVM_HoldsLock");
3219 assert(THREAD->is_Java_thread(), "sanity check");
3220 if (obj == NULL) {
3221 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3222 }
3223 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3224 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3225 JVM_END
3228 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3229 JVMWrapper("JVM_DumpAllStacks");
3230 VM_PrintThreads op;
3231 VMThread::execute(&op);
3232 if (JvmtiExport::should_post_data_dump()) {
3233 JvmtiExport::post_data_dump();
3234 }
3235 JVM_END
3237 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3238 JVMWrapper("JVM_SetNativeThreadName");
3239 ResourceMark rm(THREAD);
3240 oop java_thread = JNIHandles::resolve_non_null(jthread);
3241 JavaThread* thr = java_lang_Thread::thread(java_thread);
3242 // Thread naming only supported for the current thread, doesn't work for
3243 // target threads.
3244 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3245 // we don't set the name of an attached thread to avoid stepping
3246 // on other programs
3247 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3248 os::set_native_thread_name(thread_name);
3249 }
3250 JVM_END
3252 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3254 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3255 assert(jthread->is_Java_thread(), "must be a Java thread");
3256 if (jthread->privileged_stack_top() == NULL) return false;
3257 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3258 oop loader = jthread->privileged_stack_top()->class_loader();
3259 if (loader == NULL) return true;
3260 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3261 if (trusted) return true;
3262 }
3263 return false;
3264 }
3266 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3267 JVMWrapper("JVM_CurrentLoadedClass");
3268 ResourceMark rm(THREAD);
3270 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3271 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3272 bool trusted = is_trusted_frame(thread, &vfst);
3273 if (trusted) return NULL;
3275 Method* m = vfst.method();
3276 if (!m->is_native()) {
3277 InstanceKlass* holder = m->method_holder();
3278 oop loader = holder->class_loader();
3279 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3280 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3281 }
3282 }
3283 }
3284 return NULL;
3285 JVM_END
3288 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3289 JVMWrapper("JVM_CurrentClassLoader");
3290 ResourceMark rm(THREAD);
3292 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3294 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3295 bool trusted = is_trusted_frame(thread, &vfst);
3296 if (trusted) return NULL;
3298 Method* m = vfst.method();
3299 if (!m->is_native()) {
3300 InstanceKlass* holder = m->method_holder();
3301 assert(holder->is_klass(), "just checking");
3302 oop loader = holder->class_loader();
3303 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3304 return JNIHandles::make_local(env, loader);
3305 }
3306 }
3307 }
3308 return NULL;
3309 JVM_END
3312 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3313 JVMWrapper("JVM_GetClassContext");
3314 ResourceMark rm(THREAD);
3315 JvmtiVMObjectAllocEventCollector oam;
3316 vframeStream vfst(thread);
3318 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3319 // This must only be called from SecurityManager.getClassContext
3320 Method* m = vfst.method();
3321 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3322 m->name() == vmSymbols::getClassContext_name() &&
3323 m->signature() == vmSymbols::void_class_array_signature())) {
3324 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3325 }
3326 }
3328 // Collect method holders
3329 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3330 for (; !vfst.at_end(); vfst.security_next()) {
3331 Method* m = vfst.method();
3332 // Native frames are not returned
3333 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3334 Klass* holder = m->method_holder();
3335 assert(holder->is_klass(), "just checking");
3336 klass_array->append(holder);
3337 }
3338 }
3340 // Create result array of type [Ljava/lang/Class;
3341 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3342 // Fill in mirrors corresponding to method holders
3343 for (int i = 0; i < klass_array->length(); i++) {
3344 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3345 }
3347 return (jobjectArray) JNIHandles::make_local(env, result);
3348 JVM_END
3351 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3352 JVMWrapper("JVM_ClassDepth");
3353 ResourceMark rm(THREAD);
3354 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3355 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3357 const char* str = java_lang_String::as_utf8_string(class_name_str());
3358 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3359 if (class_name_sym == NULL) {
3360 return -1;
3361 }
3363 int depth = 0;
3365 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3366 if (!vfst.method()->is_native()) {
3367 InstanceKlass* holder = vfst.method()->method_holder();
3368 assert(holder->is_klass(), "just checking");
3369 if (holder->name() == class_name_sym) {
3370 return depth;
3371 }
3372 depth++;
3373 }
3374 }
3375 return -1;
3376 JVM_END
3379 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3380 JVMWrapper("JVM_ClassLoaderDepth");
3381 ResourceMark rm(THREAD);
3382 int depth = 0;
3383 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3384 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3385 bool trusted = is_trusted_frame(thread, &vfst);
3386 if (trusted) return -1;
3388 Method* m = vfst.method();
3389 if (!m->is_native()) {
3390 InstanceKlass* holder = m->method_holder();
3391 assert(holder->is_klass(), "just checking");
3392 oop loader = holder->class_loader();
3393 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3394 return depth;
3395 }
3396 depth++;
3397 }
3398 }
3399 return -1;
3400 JVM_END
3403 // java.lang.Package ////////////////////////////////////////////////////////////////
3406 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3407 JVMWrapper("JVM_GetSystemPackage");
3408 ResourceMark rm(THREAD);
3409 JvmtiVMObjectAllocEventCollector oam;
3410 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3411 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3412 return (jstring) JNIHandles::make_local(result);
3413 JVM_END
3416 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3417 JVMWrapper("JVM_GetSystemPackages");
3418 JvmtiVMObjectAllocEventCollector oam;
3419 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3420 return (jobjectArray) JNIHandles::make_local(result);
3421 JVM_END
3424 // ObjectInputStream ///////////////////////////////////////////////////////////////
3426 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3427 if (current_class == NULL) {
3428 return true;
3429 }
3430 if ((current_class == field_class) || access.is_public()) {
3431 return true;
3432 }
3434 if (access.is_protected()) {
3435 // See if current_class is a subclass of field_class
3436 if (current_class->is_subclass_of(field_class)) {
3437 return true;
3438 }
3439 }
3441 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3442 }
3445 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3446 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3447 JVMWrapper("JVM_AllocateNewObject");
3448 JvmtiVMObjectAllocEventCollector oam;
3449 // Receiver is not used
3450 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3451 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3453 // Cannot instantiate primitive types
3454 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3455 ResourceMark rm(THREAD);
3456 THROW_0(vmSymbols::java_lang_InvalidClassException());
3457 }
3459 // Arrays not allowed here, must use JVM_AllocateNewArray
3460 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3461 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3462 ResourceMark rm(THREAD);
3463 THROW_0(vmSymbols::java_lang_InvalidClassException());
3464 }
3466 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3467 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3469 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3471 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3472 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3474 // Make sure klass is initialized, since we are about to instantiate one of them.
3475 curr_klass->initialize(CHECK_NULL);
3477 methodHandle m (THREAD,
3478 init_klass->find_method(vmSymbols::object_initializer_name(),
3479 vmSymbols::void_method_signature()));
3480 if (m.is_null()) {
3481 ResourceMark rm(THREAD);
3482 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3483 Method::name_and_sig_as_C_string(init_klass(),
3484 vmSymbols::object_initializer_name(),
3485 vmSymbols::void_method_signature()));
3486 }
3488 if (curr_klass == init_klass && !m->is_public()) {
3489 // Calling the constructor for class 'curr_klass'.
3490 // Only allow calls to a public no-arg constructor.
3491 // This path corresponds to creating an Externalizable object.
3492 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3493 }
3495 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3496 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3497 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3498 }
3500 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3501 // Call constructor m. This might call a constructor higher up in the hierachy
3502 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3504 return JNIHandles::make_local(obj());
3505 JVM_END
3508 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3509 JVMWrapper("JVM_AllocateNewArray");
3510 JvmtiVMObjectAllocEventCollector oam;
3511 oop mirror = JNIHandles::resolve_non_null(currClass);
3513 if (java_lang_Class::is_primitive(mirror)) {
3514 THROW_0(vmSymbols::java_lang_InvalidClassException());
3515 }
3516 Klass* k = java_lang_Class::as_Klass(mirror);
3517 oop result;
3519 if (k->oop_is_typeArray()) {
3520 // typeArray
3521 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3522 } else if (k->oop_is_objArray()) {
3523 // objArray
3524 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3525 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3526 result = oak->allocate(length, CHECK_NULL);
3527 } else {
3528 THROW_0(vmSymbols::java_lang_InvalidClassException());
3529 }
3530 return JNIHandles::make_local(env, result);
3531 JVM_END
3534 // Return the first non-null class loader up the execution stack, or null
3535 // if only code from the null class loader is on the stack.
3537 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3538 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3539 // UseNewReflection
3540 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3541 oop loader = vfst.method()->method_holder()->class_loader();
3542 if (loader != NULL) {
3543 return JNIHandles::make_local(env, loader);
3544 }
3545 }
3546 return NULL;
3547 JVM_END
3550 // Load a class relative to the most recent class on the stack with a non-null
3551 // classloader.
3552 // This function has been deprecated and should not be considered part of the
3553 // specified JVM interface.
3555 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3556 jclass currClass, jstring currClassName))
3557 JVMWrapper("JVM_LoadClass0");
3558 // Receiver is not used
3559 ResourceMark rm(THREAD);
3561 // Class name argument is not guaranteed to be in internal format
3562 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3563 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3565 const char* str = java_lang_String::as_utf8_string(string());
3567 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3568 // It's impossible to create this class; the name cannot fit
3569 // into the constant pool.
3570 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3571 }
3573 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3574 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3575 // Find the most recent class on the stack with a non-null classloader
3576 oop loader = NULL;
3577 oop protection_domain = NULL;
3578 if (curr_klass.is_null()) {
3579 for (vframeStream vfst(thread);
3580 !vfst.at_end() && loader == NULL;
3581 vfst.next()) {
3582 if (!vfst.method()->is_native()) {
3583 InstanceKlass* holder = vfst.method()->method_holder();
3584 loader = holder->class_loader();
3585 protection_domain = holder->protection_domain();
3586 }
3587 }
3588 } else {
3589 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3590 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3591 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3592 }
3593 Handle h_loader(THREAD, loader);
3594 Handle h_prot (THREAD, protection_domain);
3595 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3596 false, thread);
3597 if (TraceClassResolution && result != NULL) {
3598 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3599 }
3600 return result;
3601 JVM_END
3604 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3607 // resolve array handle and check arguments
3608 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3609 if (arr == NULL) {
3610 THROW_0(vmSymbols::java_lang_NullPointerException());
3611 }
3612 oop a = JNIHandles::resolve_non_null(arr);
3613 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3614 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3615 }
3616 return arrayOop(a);
3617 }
3620 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3621 JVMWrapper("JVM_GetArrayLength");
3622 arrayOop a = check_array(env, arr, false, CHECK_0);
3623 return a->length();
3624 JVM_END
3627 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3628 JVMWrapper("JVM_Array_Get");
3629 JvmtiVMObjectAllocEventCollector oam;
3630 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3631 jvalue value;
3632 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3633 oop box = Reflection::box(&value, type, CHECK_NULL);
3634 return JNIHandles::make_local(env, box);
3635 JVM_END
3638 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3639 JVMWrapper("JVM_GetPrimitiveArrayElement");
3640 jvalue value;
3641 value.i = 0; // to initialize value before getting used in CHECK
3642 arrayOop a = check_array(env, arr, true, CHECK_(value));
3643 assert(a->is_typeArray(), "just checking");
3644 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3645 BasicType wide_type = (BasicType) wCode;
3646 if (type != wide_type) {
3647 Reflection::widen(&value, type, wide_type, CHECK_(value));
3648 }
3649 return value;
3650 JVM_END
3653 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3654 JVMWrapper("JVM_SetArrayElement");
3655 arrayOop a = check_array(env, arr, false, CHECK);
3656 oop box = JNIHandles::resolve(val);
3657 jvalue value;
3658 value.i = 0; // to initialize value before getting used in CHECK
3659 BasicType value_type;
3660 if (a->is_objArray()) {
3661 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3662 value_type = Reflection::unbox_for_regular_object(box, &value);
3663 } else {
3664 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3665 }
3666 Reflection::array_set(&value, a, index, value_type, CHECK);
3667 JVM_END
3670 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3671 JVMWrapper("JVM_SetPrimitiveArrayElement");
3672 arrayOop a = check_array(env, arr, true, CHECK);
3673 assert(a->is_typeArray(), "just checking");
3674 BasicType value_type = (BasicType) vCode;
3675 Reflection::array_set(&v, a, index, value_type, CHECK);
3676 JVM_END
3679 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3680 JVMWrapper("JVM_NewArray");
3681 JvmtiVMObjectAllocEventCollector oam;
3682 oop element_mirror = JNIHandles::resolve(eltClass);
3683 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3684 return JNIHandles::make_local(env, result);
3685 JVM_END
3688 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3689 JVMWrapper("JVM_NewMultiArray");
3690 JvmtiVMObjectAllocEventCollector oam;
3691 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3692 oop element_mirror = JNIHandles::resolve(eltClass);
3693 assert(dim_array->is_typeArray(), "just checking");
3694 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3695 return JNIHandles::make_local(env, result);
3696 JVM_END
3699 // Networking library support ////////////////////////////////////////////////////////////////////
3701 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3702 JVMWrapper("JVM_InitializeSocketLibrary");
3703 return 0;
3704 JVM_END
3707 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3708 JVMWrapper("JVM_Socket");
3709 return os::socket(domain, type, protocol);
3710 JVM_END
3713 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3714 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3715 //%note jvm_r6
3716 return os::socket_close(fd);
3717 JVM_END
3720 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3721 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3722 //%note jvm_r6
3723 return os::socket_shutdown(fd, howto);
3724 JVM_END
3727 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3728 JVMWrapper2("JVM_Recv (0x%x)", fd);
3729 //%note jvm_r6
3730 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3731 JVM_END
3734 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3735 JVMWrapper2("JVM_Send (0x%x)", fd);
3736 //%note jvm_r6
3737 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3738 JVM_END
3741 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3742 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3743 //%note jvm_r6
3744 return os::timeout(fd, timeout);
3745 JVM_END
3748 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3749 JVMWrapper2("JVM_Listen (0x%x)", fd);
3750 //%note jvm_r6
3751 return os::listen(fd, count);
3752 JVM_END
3755 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3756 JVMWrapper2("JVM_Connect (0x%x)", fd);
3757 //%note jvm_r6
3758 return os::connect(fd, him, (socklen_t)len);
3759 JVM_END
3762 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3763 JVMWrapper2("JVM_Bind (0x%x)", fd);
3764 //%note jvm_r6
3765 return os::bind(fd, him, (socklen_t)len);
3766 JVM_END
3769 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3770 JVMWrapper2("JVM_Accept (0x%x)", fd);
3771 //%note jvm_r6
3772 socklen_t socklen = (socklen_t)(*len);
3773 jint result = os::accept(fd, him, &socklen);
3774 *len = (jint)socklen;
3775 return result;
3776 JVM_END
3779 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3780 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3781 //%note jvm_r6
3782 socklen_t socklen = (socklen_t)(*fromlen);
3783 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3784 *fromlen = (int)socklen;
3785 return result;
3786 JVM_END
3789 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3790 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3791 //%note jvm_r6
3792 socklen_t socklen = (socklen_t)(*len);
3793 jint result = os::get_sock_name(fd, him, &socklen);
3794 *len = (int)socklen;
3795 return result;
3796 JVM_END
3799 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3800 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3801 //%note jvm_r6
3802 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3803 JVM_END
3806 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3807 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3808 //%note jvm_r6
3809 return os::socket_available(fd, pbytes);
3810 JVM_END
3813 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3814 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3815 //%note jvm_r6
3816 socklen_t socklen = (socklen_t)(*optlen);
3817 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3818 *optlen = (int)socklen;
3819 return result;
3820 JVM_END
3823 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3824 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3825 //%note jvm_r6
3826 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3827 JVM_END
3830 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3831 JVMWrapper("JVM_GetHostName");
3832 return os::get_host_name(name, namelen);
3833 JVM_END
3836 // Library support ///////////////////////////////////////////////////////////////////////////
3838 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3839 //%note jvm_ct
3840 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3841 char ebuf[1024];
3842 void *load_result;
3843 {
3844 ThreadToNativeFromVM ttnfvm(thread);
3845 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3846 }
3847 if (load_result == NULL) {
3848 char msg[1024];
3849 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3850 // Since 'ebuf' may contain a string encoded using
3851 // platform encoding scheme, we need to pass
3852 // Exceptions::unsafe_to_utf8 to the new_exception method
3853 // as the last argument. See bug 6367357.
3854 Handle h_exception =
3855 Exceptions::new_exception(thread,
3856 vmSymbols::java_lang_UnsatisfiedLinkError(),
3857 msg, Exceptions::unsafe_to_utf8);
3859 THROW_HANDLE_0(h_exception);
3860 }
3861 return load_result;
3862 JVM_END
3865 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3866 JVMWrapper("JVM_UnloadLibrary");
3867 os::dll_unload(handle);
3868 JVM_END
3871 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3872 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3873 return os::dll_lookup(handle, name);
3874 JVM_END
3877 // Floating point support ////////////////////////////////////////////////////////////////////
3879 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3880 JVMWrapper("JVM_IsNaN");
3881 return g_isnan(a);
3882 JVM_END
3885 // JNI version ///////////////////////////////////////////////////////////////////////////////
3887 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3888 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3889 return Threads::is_supported_jni_version_including_1_1(version);
3890 JVM_END
3893 // String support ///////////////////////////////////////////////////////////////////////////
3895 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3896 JVMWrapper("JVM_InternString");
3897 JvmtiVMObjectAllocEventCollector oam;
3898 if (str == NULL) return NULL;
3899 oop string = JNIHandles::resolve_non_null(str);
3900 oop result = StringTable::intern(string, CHECK_NULL);
3901 return (jstring) JNIHandles::make_local(env, result);
3902 JVM_END
3905 // Raw monitor support //////////////////////////////////////////////////////////////////////
3907 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3908 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3909 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3910 // that only works with java threads.
3913 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3914 VM_Exit::block_if_vm_exited();
3915 JVMWrapper("JVM_RawMonitorCreate");
3916 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3917 }
3920 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3921 VM_Exit::block_if_vm_exited();
3922 JVMWrapper("JVM_RawMonitorDestroy");
3923 delete ((Mutex*) mon);
3924 }
3927 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3928 VM_Exit::block_if_vm_exited();
3929 JVMWrapper("JVM_RawMonitorEnter");
3930 ((Mutex*) mon)->jvm_raw_lock();
3931 return 0;
3932 }
3935 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3936 VM_Exit::block_if_vm_exited();
3937 JVMWrapper("JVM_RawMonitorExit");
3938 ((Mutex*) mon)->jvm_raw_unlock();
3939 }
3942 // Support for Serialization
3944 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3945 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3946 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3947 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3949 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3950 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3951 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3952 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3955 void initialize_converter_functions() {
3956 if (JDK_Version::is_gte_jdk14x_version()) {
3957 // These functions only exist for compatibility with 1.3.1 and earlier
3958 return;
3959 }
3961 // called from universe_post_init()
3962 assert(
3963 int_bits_to_float_fn == NULL &&
3964 long_bits_to_double_fn == NULL &&
3965 float_to_int_bits_fn == NULL &&
3966 double_to_long_bits_fn == NULL ,
3967 "initialization done twice"
3968 );
3969 // initialize
3970 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3971 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3972 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3973 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3974 // verify
3975 assert(
3976 int_bits_to_float_fn != NULL &&
3977 long_bits_to_double_fn != NULL &&
3978 float_to_int_bits_fn != NULL &&
3979 double_to_long_bits_fn != NULL ,
3980 "initialization failed"
3981 );
3982 }
3986 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3988 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
3989 // Security Note:
3990 // The Java level wrapper will perform the necessary security check allowing
3991 // us to pass the NULL as the initiating class loader.
3992 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3994 KlassHandle klass_handle(THREAD, klass);
3995 // Check if we should initialize the class
3996 if (init && klass_handle->oop_is_instance()) {
3997 klass_handle->initialize(CHECK_NULL);
3998 }
3999 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4000 }
4003 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4005 #ifndef PRODUCT
4007 extern "C" {
4008 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4009 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4010 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4011 }
4013 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4014 JVMWrapper("JVM_AccessBoolVMFlag");
4015 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, Flag::INTERNAL);
4016 JVM_END
4018 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4019 JVMWrapper("JVM_AccessVMIntFlag");
4020 intx v;
4021 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, Flag::INTERNAL);
4022 *value = (jint)v;
4023 return result;
4024 JVM_END
4027 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4028 JVMWrapper("JVM_VMBreakPoint");
4029 oop the_obj = JNIHandles::resolve(obj);
4030 BREAKPOINT;
4031 JVM_END
4034 #endif
4037 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4039 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4040 JVMWrapper("JVM_InvokeMethod");
4041 Handle method_handle;
4042 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4043 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4044 Handle receiver(THREAD, JNIHandles::resolve(obj));
4045 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4046 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4047 jobject res = JNIHandles::make_local(env, result);
4048 if (JvmtiExport::should_post_vm_object_alloc()) {
4049 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4050 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4051 if (java_lang_Class::is_primitive(ret_type)) {
4052 // Only for primitive type vm allocates memory for java object.
4053 // See box() method.
4054 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4055 }
4056 }
4057 return res;
4058 } else {
4059 THROW_0(vmSymbols::java_lang_StackOverflowError());
4060 }
4061 JVM_END
4064 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4065 JVMWrapper("JVM_NewInstanceFromConstructor");
4066 oop constructor_mirror = JNIHandles::resolve(c);
4067 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4068 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4069 jobject res = JNIHandles::make_local(env, result);
4070 if (JvmtiExport::should_post_vm_object_alloc()) {
4071 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4072 }
4073 return res;
4074 JVM_END
4076 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4078 JVM_LEAF(jboolean, JVM_SupportsCX8())
4079 JVMWrapper("JVM_SupportsCX8");
4080 return VM_Version::supports_cx8();
4081 JVM_END
4084 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4085 JVMWrapper("JVM_CX8Field");
4086 jlong res;
4087 oop o = JNIHandles::resolve(obj);
4088 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4089 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4091 assert(VM_Version::supports_cx8(), "cx8 not supported");
4092 res = Atomic::cmpxchg(newVal, addr, oldVal);
4094 return res == oldVal;
4095 JVM_END
4097 // DTrace ///////////////////////////////////////////////////////////////////
4099 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4100 JVMWrapper("JVM_DTraceGetVersion");
4101 return (jint)JVM_TRACING_DTRACE_VERSION;
4102 JVM_END
4104 JVM_ENTRY(jlong,JVM_DTraceActivate(
4105 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4106 JVM_DTraceProvider* providers))
4107 JVMWrapper("JVM_DTraceActivate");
4108 return DTraceJSDT::activate(
4109 version, module_name, providers_count, providers, CHECK_0);
4110 JVM_END
4112 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4113 JVMWrapper("JVM_DTraceIsProbeEnabled");
4114 return DTraceJSDT::is_probe_enabled(method);
4115 JVM_END
4117 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4118 JVMWrapper("JVM_DTraceDispose");
4119 DTraceJSDT::dispose(handle);
4120 JVM_END
4122 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4123 JVMWrapper("JVM_DTraceIsSupported");
4124 return DTraceJSDT::is_supported();
4125 JVM_END
4127 // Returns an array of all live Thread objects (VM internal JavaThreads,
4128 // jvmti agent threads, and JNI attaching threads are skipped)
4129 // See CR 6404306 regarding JNI attaching threads
4130 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4131 ResourceMark rm(THREAD);
4132 ThreadsListEnumerator tle(THREAD, false, false);
4133 JvmtiVMObjectAllocEventCollector oam;
4135 int num_threads = tle.num_threads();
4136 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4137 objArrayHandle threads_ah(THREAD, r);
4139 for (int i = 0; i < num_threads; i++) {
4140 Handle h = tle.get_threadObj(i);
4141 threads_ah->obj_at_put(i, h());
4142 }
4144 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4145 JVM_END
4148 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4149 // Return StackTraceElement[][], each element is the stack trace of a thread in
4150 // the corresponding entry in the given threads array
4151 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4152 JVMWrapper("JVM_DumpThreads");
4153 JvmtiVMObjectAllocEventCollector oam;
4155 // Check if threads is null
4156 if (threads == NULL) {
4157 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4158 }
4160 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4161 objArrayHandle ah(THREAD, a);
4162 int num_threads = ah->length();
4163 // check if threads is non-empty array
4164 if (num_threads == 0) {
4165 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4166 }
4168 // check if threads is not an array of objects of Thread class
4169 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4170 if (k != SystemDictionary::Thread_klass()) {
4171 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4172 }
4174 ResourceMark rm(THREAD);
4176 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4177 for (int i = 0; i < num_threads; i++) {
4178 oop thread_obj = ah->obj_at(i);
4179 instanceHandle h(THREAD, (instanceOop) thread_obj);
4180 thread_handle_array->append(h);
4181 }
4183 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4184 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4186 JVM_END
4188 // JVM monitoring and management support
4189 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4190 return Management::get_jmm_interface(version);
4191 JVM_END
4193 // com.sun.tools.attach.VirtualMachine agent properties support
4194 //
4195 // Initialize the agent properties with the properties maintained in the VM
4196 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4197 JVMWrapper("JVM_InitAgentProperties");
4198 ResourceMark rm;
4200 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4202 PUTPROP(props, "sun.java.command", Arguments::java_command());
4203 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4204 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4205 return properties;
4206 JVM_END
4208 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4209 {
4210 JVMWrapper("JVM_GetEnclosingMethodInfo");
4211 JvmtiVMObjectAllocEventCollector oam;
4213 if (ofClass == NULL) {
4214 return NULL;
4215 }
4216 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4217 // Special handling for primitive objects
4218 if (java_lang_Class::is_primitive(mirror())) {
4219 return NULL;
4220 }
4221 Klass* k = java_lang_Class::as_Klass(mirror());
4222 if (!k->oop_is_instance()) {
4223 return NULL;
4224 }
4225 instanceKlassHandle ik_h(THREAD, k);
4226 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4227 if (encl_method_class_idx == 0) {
4228 return NULL;
4229 }
4230 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4231 objArrayHandle dest(THREAD, dest_o);
4232 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4233 dest->obj_at_put(0, enc_k->java_mirror());
4234 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4235 if (encl_method_method_idx != 0) {
4236 Symbol* sym = ik_h->constants()->symbol_at(
4237 extract_low_short_from_int(
4238 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4239 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4240 dest->obj_at_put(1, str());
4241 sym = ik_h->constants()->symbol_at(
4242 extract_high_short_from_int(
4243 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4244 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4245 dest->obj_at_put(2, str());
4246 }
4247 return (jobjectArray) JNIHandles::make_local(dest());
4248 }
4249 JVM_END
4251 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4252 jint javaThreadState))
4253 {
4254 // If new thread states are added in future JDK and VM versions,
4255 // this should check if the JDK version is compatible with thread
4256 // states supported by the VM. Return NULL if not compatible.
4257 //
4258 // This function must map the VM java_lang_Thread::ThreadStatus
4259 // to the Java thread state that the JDK supports.
4260 //
4262 typeArrayHandle values_h;
4263 switch (javaThreadState) {
4264 case JAVA_THREAD_STATE_NEW : {
4265 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4266 values_h = typeArrayHandle(THREAD, r);
4267 values_h->int_at_put(0, java_lang_Thread::NEW);
4268 break;
4269 }
4270 case JAVA_THREAD_STATE_RUNNABLE : {
4271 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4272 values_h = typeArrayHandle(THREAD, r);
4273 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4274 break;
4275 }
4276 case JAVA_THREAD_STATE_BLOCKED : {
4277 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4278 values_h = typeArrayHandle(THREAD, r);
4279 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4280 break;
4281 }
4282 case JAVA_THREAD_STATE_WAITING : {
4283 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4284 values_h = typeArrayHandle(THREAD, r);
4285 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4286 values_h->int_at_put(1, java_lang_Thread::PARKED);
4287 break;
4288 }
4289 case JAVA_THREAD_STATE_TIMED_WAITING : {
4290 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4291 values_h = typeArrayHandle(THREAD, r);
4292 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4293 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4294 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4295 break;
4296 }
4297 case JAVA_THREAD_STATE_TERMINATED : {
4298 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4299 values_h = typeArrayHandle(THREAD, r);
4300 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4301 break;
4302 }
4303 default:
4304 // Unknown state - probably incompatible JDK version
4305 return NULL;
4306 }
4308 return (jintArray) JNIHandles::make_local(env, values_h());
4309 }
4310 JVM_END
4313 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4314 jint javaThreadState,
4315 jintArray values))
4316 {
4317 // If new thread states are added in future JDK and VM versions,
4318 // this should check if the JDK version is compatible with thread
4319 // states supported by the VM. Return NULL if not compatible.
4320 //
4321 // This function must map the VM java_lang_Thread::ThreadStatus
4322 // to the Java thread state that the JDK supports.
4323 //
4325 ResourceMark rm;
4327 // Check if threads is null
4328 if (values == NULL) {
4329 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4330 }
4332 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4333 typeArrayHandle values_h(THREAD, v);
4335 objArrayHandle names_h;
4336 switch (javaThreadState) {
4337 case JAVA_THREAD_STATE_NEW : {
4338 assert(values_h->length() == 1 &&
4339 values_h->int_at(0) == java_lang_Thread::NEW,
4340 "Invalid threadStatus value");
4342 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4343 1, /* only 1 substate */
4344 CHECK_NULL);
4345 names_h = objArrayHandle(THREAD, r);
4346 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4347 names_h->obj_at_put(0, name());
4348 break;
4349 }
4350 case JAVA_THREAD_STATE_RUNNABLE : {
4351 assert(values_h->length() == 1 &&
4352 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4353 "Invalid threadStatus value");
4355 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4356 1, /* only 1 substate */
4357 CHECK_NULL);
4358 names_h = objArrayHandle(THREAD, r);
4359 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4360 names_h->obj_at_put(0, name());
4361 break;
4362 }
4363 case JAVA_THREAD_STATE_BLOCKED : {
4364 assert(values_h->length() == 1 &&
4365 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4366 "Invalid threadStatus value");
4368 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4369 1, /* only 1 substate */
4370 CHECK_NULL);
4371 names_h = objArrayHandle(THREAD, r);
4372 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4373 names_h->obj_at_put(0, name());
4374 break;
4375 }
4376 case JAVA_THREAD_STATE_WAITING : {
4377 assert(values_h->length() == 2 &&
4378 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4379 values_h->int_at(1) == java_lang_Thread::PARKED,
4380 "Invalid threadStatus value");
4381 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4382 2, /* number of substates */
4383 CHECK_NULL);
4384 names_h = objArrayHandle(THREAD, r);
4385 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4386 CHECK_NULL);
4387 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4388 CHECK_NULL);
4389 names_h->obj_at_put(0, name0());
4390 names_h->obj_at_put(1, name1());
4391 break;
4392 }
4393 case JAVA_THREAD_STATE_TIMED_WAITING : {
4394 assert(values_h->length() == 3 &&
4395 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4396 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4397 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4398 "Invalid threadStatus value");
4399 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4400 3, /* number of substates */
4401 CHECK_NULL);
4402 names_h = objArrayHandle(THREAD, r);
4403 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4404 CHECK_NULL);
4405 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4406 CHECK_NULL);
4407 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4408 CHECK_NULL);
4409 names_h->obj_at_put(0, name0());
4410 names_h->obj_at_put(1, name1());
4411 names_h->obj_at_put(2, name2());
4412 break;
4413 }
4414 case JAVA_THREAD_STATE_TERMINATED : {
4415 assert(values_h->length() == 1 &&
4416 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4417 "Invalid threadStatus value");
4418 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4419 1, /* only 1 substate */
4420 CHECK_NULL);
4421 names_h = objArrayHandle(THREAD, r);
4422 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4423 names_h->obj_at_put(0, name());
4424 break;
4425 }
4426 default:
4427 // Unknown state - probably incompatible JDK version
4428 return NULL;
4429 }
4430 return (jobjectArray) JNIHandles::make_local(env, names_h());
4431 }
4432 JVM_END
4434 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4435 {
4436 memset(info, 0, sizeof(info_size));
4438 info->jvm_version = Abstract_VM_Version::jvm_version();
4439 info->update_version = 0; /* 0 in HotSpot Express VM */
4440 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4442 // when we add a new capability in the jvm_version_info struct, we should also
4443 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4444 // counter defined in runtimeService.cpp.
4445 info->is_attachable = AttachListener::is_attach_supported();
4446 }
4447 JVM_END