Fri, 10 Jul 2009 11:10:00 -0700
6857194: Add hotspot perf counters to aid class loading performance measurement
Summary: Add new jvmstat counters to measure detailed class loading time
Reviewed-by: acorn, kamg
1 /*
2 * Copyright 1997-2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
25 #include "incls/_precompiled.incl"
26 #include "incls/_jvm.cpp.incl"
27 #include <errno.h>
29 /*
30 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
31 such ctors and calls MUST NOT come between an oop declaration/init and its
32 usage because if objects are move this may cause various memory stomps, bus
33 errors and segfaults. Here is a cookbook for causing so called "naked oop
34 failures":
36 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
37 JVMWrapper("JVM_GetClassDeclaredFields");
39 // Object address to be held directly in mirror & not visible to GC
40 oop mirror = JNIHandles::resolve_non_null(ofClass);
42 // If this ctor can hit a safepoint, moving objects around, then
43 ComplexConstructor foo;
45 // Boom! mirror may point to JUNK instead of the intended object
46 (some dereference of mirror)
48 // Here's another call that may block for GC, making mirror stale
49 MutexLocker ml(some_lock);
51 // And here's an initializer that can result in a stale oop
52 // all in one step.
53 oop o = call_that_can_throw_exception(TRAPS);
56 The solution is to keep the oop declaration BELOW the ctor or function
57 call that might cause a GC, do another resolve to reassign the oop, or
58 consider use of a Handle instead of an oop so there is immunity from object
59 motion. But note that the "QUICK" entries below do not have a handlemark
60 and thus can only support use of handles passed in.
61 */
63 static void trace_class_resolution_impl(klassOop to_class, TRAPS) {
64 ResourceMark rm;
65 int line_number = -1;
66 const char * source_file = NULL;
67 const char * trace = "explicit";
68 klassOop caller = NULL;
69 JavaThread* jthread = JavaThread::current();
70 if (jthread->has_last_Java_frame()) {
71 vframeStream vfst(jthread);
73 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
74 symbolHandle access_controller = oopFactory::new_symbol_handle("java/security/AccessController", CHECK);
75 klassOop access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
76 symbolHandle privileged_action = oopFactory::new_symbol_handle("java/security/PrivilegedAction", CHECK);
77 klassOop privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
79 methodOop last_caller = NULL;
81 while (!vfst.at_end()) {
82 methodOop m = vfst.method();
83 if (!vfst.method()->method_holder()->klass_part()->is_subclass_of(SystemDictionary::classloader_klass())&&
84 !vfst.method()->method_holder()->klass_part()->is_subclass_of(access_controller_klass) &&
85 !vfst.method()->method_holder()->klass_part()->is_subclass_of(privileged_action_klass)) {
86 break;
87 }
88 last_caller = m;
89 vfst.next();
90 }
91 // if this is called from Class.forName0 and that is called from Class.forName,
92 // then print the caller of Class.forName. If this is Class.loadClass, then print
93 // that caller, otherwise keep quiet since this should be picked up elsewhere.
94 bool found_it = false;
95 if (!vfst.at_end() &&
96 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() &&
97 vfst.method()->name() == vmSymbols::forName0_name()) {
98 vfst.next();
99 if (!vfst.at_end() &&
100 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() &&
101 vfst.method()->name() == vmSymbols::forName_name()) {
102 vfst.next();
103 found_it = true;
104 }
105 } else if (last_caller != NULL &&
106 instanceKlass::cast(last_caller->method_holder())->name() ==
107 vmSymbols::java_lang_ClassLoader() &&
108 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
109 last_caller->name() == vmSymbols::loadClass_name())) {
110 found_it = true;
111 } else if (!vfst.at_end()) {
112 if (vfst.method()->is_native()) {
113 // JNI call
114 found_it = true;
115 }
116 }
117 if (found_it && !vfst.at_end()) {
118 // found the caller
119 caller = vfst.method()->method_holder();
120 line_number = vfst.method()->line_number_from_bci(vfst.bci());
121 if (line_number == -1) {
122 // show method name if it's a native method
123 trace = vfst.method()->name_and_sig_as_C_string();
124 }
125 symbolOop s = instanceKlass::cast(caller)->source_file_name();
126 if (s != NULL) {
127 source_file = s->as_C_string();
128 }
129 }
130 }
131 if (caller != NULL) {
132 if (to_class != caller) {
133 const char * from = Klass::cast(caller)->external_name();
134 const char * to = Klass::cast(to_class)->external_name();
135 // print in a single call to reduce interleaving between threads
136 if (source_file != NULL) {
137 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
138 } else {
139 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
140 }
141 }
142 }
143 }
145 void trace_class_resolution(klassOop to_class) {
146 EXCEPTION_MARK;
147 trace_class_resolution_impl(to_class, THREAD);
148 if (HAS_PENDING_EXCEPTION) {
149 CLEAR_PENDING_EXCEPTION;
150 }
151 }
153 // Wrapper to trace JVM functions
155 #ifdef ASSERT
156 class JVMTraceWrapper : public StackObj {
157 public:
158 JVMTraceWrapper(const char* format, ...) {
159 if (TraceJVMCalls) {
160 va_list ap;
161 va_start(ap, format);
162 tty->print("JVM ");
163 tty->vprint_cr(format, ap);
164 va_end(ap);
165 }
166 }
167 };
169 Histogram* JVMHistogram;
170 volatile jint JVMHistogram_lock = 0;
172 class JVMHistogramElement : public HistogramElement {
173 public:
174 JVMHistogramElement(const char* name);
175 };
177 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
178 _name = elementName;
179 uintx count = 0;
181 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
182 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
183 count +=1;
184 if ( (WarnOnStalledSpinLock > 0)
185 && (count % WarnOnStalledSpinLock == 0)) {
186 warning("JVMHistogram_lock seems to be stalled");
187 }
188 }
189 }
191 if(JVMHistogram == NULL)
192 JVMHistogram = new Histogram("JVM Call Counts",100);
194 JVMHistogram->add_element(this);
195 Atomic::dec(&JVMHistogram_lock);
196 }
198 #define JVMCountWrapper(arg) \
199 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
200 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
202 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
203 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
204 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
205 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
206 #else
207 #define JVMWrapper(arg1)
208 #define JVMWrapper2(arg1, arg2)
209 #define JVMWrapper3(arg1, arg2, arg3)
210 #define JVMWrapper4(arg1, arg2, arg3, arg4)
211 #endif
214 // Interface version /////////////////////////////////////////////////////////////////////
217 JVM_LEAF(jint, JVM_GetInterfaceVersion())
218 return JVM_INTERFACE_VERSION;
219 JVM_END
222 // java.lang.System //////////////////////////////////////////////////////////////////////
225 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
226 JVMWrapper("JVM_CurrentTimeMillis");
227 return os::javaTimeMillis();
228 JVM_END
230 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
231 JVMWrapper("JVM_NanoTime");
232 return os::javaTimeNanos();
233 JVM_END
236 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
237 jobject dst, jint dst_pos, jint length))
238 JVMWrapper("JVM_ArrayCopy");
239 // Check if we have null pointers
240 if (src == NULL || dst == NULL) {
241 THROW(vmSymbols::java_lang_NullPointerException());
242 }
243 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
244 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
245 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
246 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
247 // Do copy
248 Klass::cast(s->klass())->copy_array(s, src_pos, d, dst_pos, length, thread);
249 JVM_END
252 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
253 JavaValue r(T_OBJECT);
254 // public synchronized Object put(Object key, Object value);
255 HandleMark hm(THREAD);
256 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
257 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
258 JavaCalls::call_virtual(&r,
259 props,
260 KlassHandle(THREAD, SystemDictionary::properties_klass()),
261 vmSymbolHandles::put_name(),
262 vmSymbolHandles::object_object_object_signature(),
263 key_str,
264 value_str,
265 THREAD);
266 }
269 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
272 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
273 JVMWrapper("JVM_InitProperties");
274 ResourceMark rm;
276 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
278 // System property list includes both user set via -D option and
279 // jvm system specific properties.
280 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
281 PUTPROP(props, p->key(), p->value());
282 }
284 // Convert the -XX:MaxDirectMemorySize= command line flag
285 // to the sun.nio.MaxDirectMemorySize property.
286 // Do this after setting user properties to prevent people
287 // from setting the value with a -D option, as requested.
288 {
289 char as_chars[256];
290 jio_snprintf(as_chars, sizeof(as_chars), INTX_FORMAT, MaxDirectMemorySize);
291 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
292 }
294 // JVM monitoring and management support
295 // Add the sun.management.compiler property for the compiler's name
296 {
297 #undef CSIZE
298 #if defined(_LP64) || defined(_WIN64)
299 #define CSIZE "64-Bit "
300 #else
301 #define CSIZE
302 #endif // 64bit
304 #ifdef TIERED
305 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
306 #else
307 #if defined(COMPILER1)
308 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
309 #elif defined(COMPILER2)
310 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
311 #else
312 const char* compiler_name = "";
313 #endif // compilers
314 #endif // TIERED
316 if (*compiler_name != '\0' &&
317 (Arguments::mode() != Arguments::_int)) {
318 PUTPROP(props, "sun.management.compiler", compiler_name);
319 }
320 }
322 return properties;
323 JVM_END
326 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
328 extern volatile jint vm_created;
330 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
331 if (vm_created != 0 && (code == 0)) {
332 // The VM is about to exit. We call back into Java to check whether finalizers should be run
333 Universe::run_finalizers_on_exit();
334 }
335 before_exit(thread);
336 vm_exit(code);
337 JVM_END
340 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
341 before_exit(thread);
342 vm_exit(code);
343 JVM_END
346 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
347 register_on_exit_function(func);
348 JVM_END
351 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
352 JVMWrapper("JVM_GC");
353 if (!DisableExplicitGC) {
354 Universe::heap()->collect(GCCause::_java_lang_system_gc);
355 }
356 JVM_END
359 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
360 JVMWrapper("JVM_MaxObjectInspectionAge");
361 return Universe::heap()->millis_since_last_gc();
362 JVM_END
365 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
366 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
367 JVM_END
370 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
371 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
372 JVM_END
374 static inline jlong convert_size_t_to_jlong(size_t val) {
375 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
376 NOT_LP64 (return (jlong)val;)
377 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
378 }
380 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
381 JVMWrapper("JVM_TotalMemory");
382 size_t n = Universe::heap()->capacity();
383 return convert_size_t_to_jlong(n);
384 JVM_END
387 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
388 JVMWrapper("JVM_FreeMemory");
389 CollectedHeap* ch = Universe::heap();
390 size_t n;
391 {
392 MutexLocker x(Heap_lock);
393 n = ch->capacity() - ch->used();
394 }
395 return convert_size_t_to_jlong(n);
396 JVM_END
399 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
400 JVMWrapper("JVM_MaxMemory");
401 size_t n = Universe::heap()->max_capacity();
402 return convert_size_t_to_jlong(n);
403 JVM_END
406 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
407 JVMWrapper("JVM_ActiveProcessorCount");
408 return os::active_processor_count();
409 JVM_END
413 // java.lang.Throwable //////////////////////////////////////////////////////
416 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
417 JVMWrapper("JVM_FillInStackTrace");
418 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
419 java_lang_Throwable::fill_in_stack_trace(exception);
420 JVM_END
423 JVM_ENTRY(void, JVM_PrintStackTrace(JNIEnv *env, jobject receiver, jobject printable))
424 JVMWrapper("JVM_PrintStackTrace");
425 // Note: This is no longer used in Merlin, but we still support it for compatibility.
426 oop exception = JNIHandles::resolve_non_null(receiver);
427 oop stream = JNIHandles::resolve_non_null(printable);
428 java_lang_Throwable::print_stack_trace(exception, stream);
429 JVM_END
432 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
433 JVMWrapper("JVM_GetStackTraceDepth");
434 oop exception = JNIHandles::resolve(throwable);
435 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
436 JVM_END
439 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
440 JVMWrapper("JVM_GetStackTraceElement");
441 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
442 oop exception = JNIHandles::resolve(throwable);
443 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
444 return JNIHandles::make_local(env, element);
445 JVM_END
448 // java.lang.Object ///////////////////////////////////////////////
451 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
452 JVMWrapper("JVM_IHashCode");
453 // as implemented in the classic virtual machine; return 0 if object is NULL
454 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
455 JVM_END
458 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
459 JVMWrapper("JVM_MonitorWait");
460 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
461 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorWait must apply to an object");
462 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
463 if (JvmtiExport::should_post_monitor_wait()) {
464 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
465 }
466 ObjectSynchronizer::wait(obj, ms, CHECK);
467 JVM_END
470 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
471 JVMWrapper("JVM_MonitorNotify");
472 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
473 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotify must apply to an object");
474 ObjectSynchronizer::notify(obj, CHECK);
475 JVM_END
478 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
479 JVMWrapper("JVM_MonitorNotifyAll");
480 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
481 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotifyAll must apply to an object");
482 ObjectSynchronizer::notifyall(obj, CHECK);
483 JVM_END
486 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
487 JVMWrapper("JVM_Clone");
488 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
489 const KlassHandle klass (THREAD, obj->klass());
490 JvmtiVMObjectAllocEventCollector oam;
492 #ifdef ASSERT
493 // Just checking that the cloneable flag is set correct
494 if (obj->is_javaArray()) {
495 guarantee(klass->is_cloneable(), "all arrays are cloneable");
496 } else {
497 guarantee(obj->is_instance(), "should be instanceOop");
498 bool cloneable = klass->is_subtype_of(SystemDictionary::cloneable_klass());
499 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
500 }
501 #endif
503 // Check if class of obj supports the Cloneable interface.
504 // All arrays are considered to be cloneable (See JLS 20.1.5)
505 if (!klass->is_cloneable()) {
506 ResourceMark rm(THREAD);
507 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
508 }
510 // Make shallow object copy
511 const int size = obj->size();
512 oop new_obj = NULL;
513 if (obj->is_javaArray()) {
514 const int length = ((arrayOop)obj())->length();
515 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
516 } else {
517 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
518 }
519 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
520 // is modifying a reference field in the clonee, a non-oop-atomic copy might
521 // be suspended in the middle of copying the pointer and end up with parts
522 // of two different pointers in the field. Subsequent dereferences will crash.
523 // 4846409: an oop-copy of objects with long or double fields or arrays of same
524 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
525 // of oops. We know objects are aligned on a minimum of an jlong boundary.
526 // The same is true of StubRoutines::object_copy and the various oop_copy
527 // variants, and of the code generated by the inline_native_clone intrinsic.
528 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
529 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
530 (size_t)align_object_size(size) / HeapWordsPerLong);
531 // Clear the header
532 new_obj->init_mark();
534 // Store check (mark entire object and let gc sort it out)
535 BarrierSet* bs = Universe::heap()->barrier_set();
536 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
537 bs->write_region(MemRegion((HeapWord*)new_obj, size));
539 // Caution: this involves a java upcall, so the clone should be
540 // "gc-robust" by this stage.
541 if (klass->has_finalizer()) {
542 assert(obj->is_instance(), "should be instanceOop");
543 new_obj = instanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
544 }
546 return JNIHandles::make_local(env, oop(new_obj));
547 JVM_END
549 // java.lang.Compiler ////////////////////////////////////////////////////
551 // The initial cuts of the HotSpot VM will not support JITs, and all existing
552 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
553 // functions are all silently ignored unless JVM warnings are printed.
555 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
556 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
557 JVM_END
560 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
561 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
562 return JNI_FALSE;
563 JVM_END
566 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
567 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
568 return JNI_FALSE;
569 JVM_END
572 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
573 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
574 return JNI_FALSE;
575 JVM_END
578 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
579 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
580 return NULL;
581 JVM_END
584 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
585 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
586 JVM_END
589 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
590 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
591 JVM_END
595 // Error message support //////////////////////////////////////////////////////
597 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
598 JVMWrapper("JVM_GetLastErrorString");
599 return hpi::lasterror(buf, len);
600 JVM_END
603 // java.io.File ///////////////////////////////////////////////////////////////
605 JVM_LEAF(char*, JVM_NativePath(char* path))
606 JVMWrapper2("JVM_NativePath (%s)", path);
607 return hpi::native_path(path);
608 JVM_END
611 // Misc. class handling ///////////////////////////////////////////////////////////
614 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
615 JVMWrapper("JVM_GetCallerClass");
616 klassOop k = thread->security_get_caller_class(depth);
617 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
618 JVM_END
621 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
622 JVMWrapper("JVM_FindPrimitiveClass");
623 oop mirror = NULL;
624 BasicType t = name2type(utf);
625 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
626 mirror = Universe::java_mirror(t);
627 }
628 if (mirror == NULL) {
629 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
630 } else {
631 return (jclass) JNIHandles::make_local(env, mirror);
632 }
633 JVM_END
636 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
637 JVMWrapper("JVM_ResolveClass");
638 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
639 JVM_END
641 // Common implementation for JVM_FindClassFromBootLoader and
642 // JVM_FindClassFromLoader
643 static jclass jvm_find_class_from_class_loader(JNIEnv* env, const char* name,
644 jboolean init, jobject loader,
645 jboolean throwError, TRAPS) {
646 // Java libraries should ensure that name is never null...
647 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) {
648 // It's impossible to create this class; the name cannot fit
649 // into the constant pool.
650 if (throwError) {
651 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
652 } else {
653 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
654 }
655 }
656 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL);
657 Handle h_loader(THREAD, JNIHandles::resolve(loader));
658 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
659 Handle(), throwError, THREAD);
661 if (TraceClassResolution && result != NULL) {
662 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));
663 }
664 return result;
665 }
667 // Rationale behind JVM_FindClassFromBootLoader
668 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
669 // b> because of (a) java.dll has a direct dependecy on the unexported
670 // private symbol "_JVM_FindClassFromClassLoader@20".
671 // c> the launcher cannot use the private symbol as it dynamically opens
672 // the entry point, so if something changes, the launcher will fail
673 // unexpectedly at runtime, it is safest for the launcher to dlopen a
674 // stable exported interface.
675 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
676 // signature to change from _JVM_FindClassFromClassLoader@20 to
677 // JVM_FindClassFromClassLoader and will not be backward compatible
678 // with older JDKs.
679 // Thus a public/stable exported entry point is the right solution,
680 // public here means public in linker semantics, and is exported only
681 // to the JDK, and is not intended to be a public API.
683 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
684 const char* name,
685 jboolean throwError))
686 JVMWrapper3("JVM_FindClassFromBootLoader %s throw %s", name,
687 throwError ? "error" : "exception");
688 return jvm_find_class_from_class_loader(env, name, JNI_FALSE,
689 (jobject)NULL, throwError, THREAD);
690 JVM_END
692 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
693 jboolean init, jobject loader,
694 jboolean throwError))
695 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
696 throwError ? "error" : "exception");
697 return jvm_find_class_from_class_loader(env, name, init, loader,
698 throwError, THREAD);
699 JVM_END
702 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
703 jboolean init, jclass from))
704 JVMWrapper2("JVM_FindClassFromClass %s", name);
705 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) {
706 // It's impossible to create this class; the name cannot fit
707 // into the constant pool.
708 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
709 }
710 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL);
711 oop from_class_oop = JNIHandles::resolve(from);
712 klassOop from_class = (from_class_oop == NULL)
713 ? (klassOop)NULL
714 : java_lang_Class::as_klassOop(from_class_oop);
715 oop class_loader = NULL;
716 oop protection_domain = NULL;
717 if (from_class != NULL) {
718 class_loader = Klass::cast(from_class)->class_loader();
719 protection_domain = Klass::cast(from_class)->protection_domain();
720 }
721 Handle h_loader(THREAD, class_loader);
722 Handle h_prot (THREAD, protection_domain);
723 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
724 h_prot, true, thread);
726 if (TraceClassResolution && result != NULL) {
727 // this function is generally only used for class loading during verification.
728 ResourceMark rm;
729 oop from_mirror = JNIHandles::resolve_non_null(from);
730 klassOop from_class = java_lang_Class::as_klassOop(from_mirror);
731 const char * from_name = Klass::cast(from_class)->external_name();
733 oop mirror = JNIHandles::resolve_non_null(result);
734 klassOop to_class = java_lang_Class::as_klassOop(mirror);
735 const char * to = Klass::cast(to_class)->external_name();
736 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
737 }
739 return result;
740 JVM_END
742 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
743 if (loader.is_null()) {
744 return;
745 }
747 // check whether the current caller thread holds the lock or not.
748 // If not, increment the corresponding counter
749 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
750 ObjectSynchronizer::owner_self) {
751 counter->inc();
752 }
753 }
755 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
756 static jclass jvm_define_class_common(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source, TRAPS) {
757 if (source == NULL) source = "__JVM_DefineClass__";
759 assert(THREAD->is_Java_thread(), "must be a JavaThread");
760 JavaThread* jt = (JavaThread*) THREAD;
762 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
763 ClassLoader::perf_define_appclass_selftime(),
764 ClassLoader::perf_define_appclasses(),
765 jt->get_thread_stat()->perf_recursion_counts_addr(),
766 jt->get_thread_stat()->perf_timers_addr(),
767 PerfClassTraceTime::DEFINE_CLASS);
769 if (UsePerfData) {
770 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
771 }
773 // Since exceptions can be thrown, class initialization can take place
774 // if name is NULL no check for class name in .class stream has to be made.
775 symbolHandle class_name;
776 if (name != NULL) {
777 const int str_len = (int)strlen(name);
778 if (str_len > symbolOopDesc::max_length()) {
779 // It's impossible to create this class; the name cannot fit
780 // into the constant pool.
781 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
782 }
783 class_name = oopFactory::new_symbol_handle(name, str_len, CHECK_NULL);
784 }
786 ResourceMark rm(THREAD);
787 ClassFileStream st((u1*) buf, len, (char *)source);
788 Handle class_loader (THREAD, JNIHandles::resolve(loader));
789 if (UsePerfData) {
790 is_lock_held_by_thread(class_loader,
791 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
792 THREAD);
793 }
794 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
795 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader,
796 protection_domain, &st,
797 CHECK_NULL);
799 if (TraceClassResolution && k != NULL) {
800 trace_class_resolution(k);
801 }
803 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
804 }
807 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
808 JVMWrapper2("JVM_DefineClass %s", name);
810 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, THREAD);
811 JVM_END
814 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
815 JVMWrapper2("JVM_DefineClassWithSource %s", name);
817 return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD);
818 JVM_END
821 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
822 JVMWrapper("JVM_FindLoadedClass");
823 ResourceMark rm(THREAD);
825 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
826 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
828 const char* str = java_lang_String::as_utf8_string(string());
829 // Sanity check, don't expect null
830 if (str == NULL) return NULL;
832 const int str_len = (int)strlen(str);
833 if (str_len > symbolOopDesc::max_length()) {
834 // It's impossible to create this class; the name cannot fit
835 // into the constant pool.
836 return NULL;
837 }
838 symbolHandle klass_name = oopFactory::new_symbol_handle(str, str_len,CHECK_NULL);
840 // Security Note:
841 // The Java level wrapper will perform the necessary security check allowing
842 // us to pass the NULL as the initiating class loader.
843 Handle h_loader(THREAD, JNIHandles::resolve(loader));
844 if (UsePerfData) {
845 is_lock_held_by_thread(h_loader,
846 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
847 THREAD);
848 }
850 klassOop k = SystemDictionary::find_instance_or_array_klass(klass_name,
851 h_loader,
852 Handle(),
853 CHECK_NULL);
855 return (k == NULL) ? NULL :
856 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
857 JVM_END
860 // Reflection support //////////////////////////////////////////////////////////////////////////////
862 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
863 assert (cls != NULL, "illegal class");
864 JVMWrapper("JVM_GetClassName");
865 JvmtiVMObjectAllocEventCollector oam;
866 ResourceMark rm(THREAD);
867 const char* name;
868 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
869 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
870 } else {
871 // Consider caching interned string in Klass
872 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
873 assert(k->is_klass(), "just checking");
874 name = Klass::cast(k)->external_name();
875 }
876 oop result = StringTable::intern((char*) name, CHECK_NULL);
877 return (jstring) JNIHandles::make_local(env, result);
878 JVM_END
881 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
882 JVMWrapper("JVM_GetClassInterfaces");
883 JvmtiVMObjectAllocEventCollector oam;
884 oop mirror = JNIHandles::resolve_non_null(cls);
886 // Special handling for primitive objects
887 if (java_lang_Class::is_primitive(mirror)) {
888 // Primitive objects does not have any interfaces
889 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL);
890 return (jobjectArray) JNIHandles::make_local(env, r);
891 }
893 KlassHandle klass(thread, java_lang_Class::as_klassOop(mirror));
894 // Figure size of result array
895 int size;
896 if (klass->oop_is_instance()) {
897 size = instanceKlass::cast(klass())->local_interfaces()->length();
898 } else {
899 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
900 size = 2;
901 }
903 // Allocate result array
904 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), size, CHECK_NULL);
905 objArrayHandle result (THREAD, r);
906 // Fill in result
907 if (klass->oop_is_instance()) {
908 // Regular instance klass, fill in all local interfaces
909 for (int index = 0; index < size; index++) {
910 klassOop k = klassOop(instanceKlass::cast(klass())->local_interfaces()->obj_at(index));
911 result->obj_at_put(index, Klass::cast(k)->java_mirror());
912 }
913 } else {
914 // All arrays implement java.lang.Cloneable and java.io.Serializable
915 result->obj_at_put(0, Klass::cast(SystemDictionary::cloneable_klass())->java_mirror());
916 result->obj_at_put(1, Klass::cast(SystemDictionary::serializable_klass())->java_mirror());
917 }
918 return (jobjectArray) JNIHandles::make_local(env, result());
919 JVM_END
922 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
923 JVMWrapper("JVM_GetClassLoader");
924 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
925 return NULL;
926 }
927 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
928 oop loader = Klass::cast(k)->class_loader();
929 return JNIHandles::make_local(env, loader);
930 JVM_END
933 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
934 JVMWrapper("JVM_IsInterface");
935 oop mirror = JNIHandles::resolve_non_null(cls);
936 if (java_lang_Class::is_primitive(mirror)) {
937 return JNI_FALSE;
938 }
939 klassOop k = java_lang_Class::as_klassOop(mirror);
940 jboolean result = Klass::cast(k)->is_interface();
941 assert(!result || Klass::cast(k)->oop_is_instance(),
942 "all interfaces are instance types");
943 // The compiler intrinsic for isInterface tests the
944 // Klass::_access_flags bits in the same way.
945 return result;
946 JVM_END
949 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
950 JVMWrapper("JVM_GetClassSigners");
951 JvmtiVMObjectAllocEventCollector oam;
952 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
953 // There are no signers for primitive types
954 return NULL;
955 }
957 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
958 objArrayOop signers = NULL;
959 if (Klass::cast(k)->oop_is_instance()) {
960 signers = instanceKlass::cast(k)->signers();
961 }
963 // If there are no signers set in the class, or if the class
964 // is an array, return NULL.
965 if (signers == NULL) return NULL;
967 // copy of the signers array
968 klassOop element = objArrayKlass::cast(signers->klass())->element_klass();
969 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
970 for (int index = 0; index < signers->length(); index++) {
971 signers_copy->obj_at_put(index, signers->obj_at(index));
972 }
974 // return the copy
975 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
976 JVM_END
979 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
980 JVMWrapper("JVM_SetClassSigners");
981 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
982 // This call is ignored for primitive types and arrays.
983 // Signers are only set once, ClassLoader.java, and thus shouldn't
984 // be called with an array. Only the bootstrap loader creates arrays.
985 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
986 if (Klass::cast(k)->oop_is_instance()) {
987 instanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers)));
988 }
989 }
990 JVM_END
993 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
994 JVMWrapper("JVM_GetProtectionDomain");
995 if (JNIHandles::resolve(cls) == NULL) {
996 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
997 }
999 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1000 // Primitive types does not have a protection domain.
1001 return NULL;
1002 }
1004 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1005 return (jobject) JNIHandles::make_local(env, Klass::cast(k)->protection_domain());
1006 JVM_END
1009 // Obsolete since 1.2 (Class.setProtectionDomain removed), although
1010 // still defined in core libraries as of 1.5.
1011 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain))
1012 JVMWrapper("JVM_SetProtectionDomain");
1013 if (JNIHandles::resolve(cls) == NULL) {
1014 THROW(vmSymbols::java_lang_NullPointerException());
1015 }
1016 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1017 // Call is ignored for primitive types
1018 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1020 // cls won't be an array, as this called only from ClassLoader.defineClass
1021 if (Klass::cast(k)->oop_is_instance()) {
1022 oop pd = JNIHandles::resolve(protection_domain);
1023 assert(pd == NULL || pd->is_oop(), "just checking");
1024 instanceKlass::cast(k)->set_protection_domain(pd);
1025 }
1026 }
1027 JVM_END
1030 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1031 JVMWrapper("JVM_DoPrivileged");
1033 if (action == NULL) {
1034 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1035 }
1037 // Stack allocated list of privileged stack elements
1038 PrivilegedElement pi;
1040 // Check that action object understands "Object run()"
1041 Handle object (THREAD, JNIHandles::resolve(action));
1043 // get run() method
1044 methodOop m_oop = Klass::cast(object->klass())->uncached_lookup_method(
1045 vmSymbols::run_method_name(),
1046 vmSymbols::void_object_signature());
1047 methodHandle m (THREAD, m_oop);
1048 if (m.is_null() || !m->is_method() || !methodOop(m())->is_public() || methodOop(m())->is_static()) {
1049 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1050 }
1052 // Compute the frame initiating the do privileged operation and setup the privileged stack
1053 vframeStream vfst(thread);
1054 vfst.security_get_caller_frame(1);
1056 if (!vfst.at_end()) {
1057 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL);
1058 thread->set_privileged_stack_top(&pi);
1059 }
1062 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1063 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1064 Handle pending_exception;
1065 JavaValue result(T_OBJECT);
1066 JavaCallArguments args(object);
1067 JavaCalls::call(&result, m, &args, THREAD);
1069 // done with action, remove ourselves from the list
1070 if (!vfst.at_end()) {
1071 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1072 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1073 }
1075 if (HAS_PENDING_EXCEPTION) {
1076 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1077 CLEAR_PENDING_EXCEPTION;
1079 if ( pending_exception->is_a(SystemDictionary::exception_klass()) &&
1080 !pending_exception->is_a(SystemDictionary::runtime_exception_klass())) {
1081 // Throw a java.security.PrivilegedActionException(Exception e) exception
1082 JavaCallArguments args(pending_exception);
1083 THROW_ARG_0(vmSymbolHandles::java_security_PrivilegedActionException(),
1084 vmSymbolHandles::exception_void_signature(),
1085 &args);
1086 }
1087 }
1089 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1090 return JNIHandles::make_local(env, (oop) result.get_jobject());
1091 JVM_END
1094 // Returns the inherited_access_control_context field of the running thread.
1095 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1096 JVMWrapper("JVM_GetInheritedAccessControlContext");
1097 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1098 return JNIHandles::make_local(env, result);
1099 JVM_END
1101 class RegisterArrayForGC {
1102 private:
1103 JavaThread *_thread;
1104 public:
1105 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1106 _thread = thread;
1107 _thread->register_array_for_gc(array);
1108 }
1110 ~RegisterArrayForGC() {
1111 _thread->register_array_for_gc(NULL);
1112 }
1113 };
1116 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1117 JVMWrapper("JVM_GetStackAccessControlContext");
1118 if (!UsePrivilegedStack) return NULL;
1120 ResourceMark rm(THREAD);
1121 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1122 JvmtiVMObjectAllocEventCollector oam;
1124 // count the protection domains on the execution stack. We collapse
1125 // duplicate consecutive protection domains into a single one, as
1126 // well as stopping when we hit a privileged frame.
1128 // Use vframeStream to iterate through Java frames
1129 vframeStream vfst(thread);
1131 oop previous_protection_domain = NULL;
1132 Handle privileged_context(thread, NULL);
1133 bool is_privileged = false;
1134 oop protection_domain = NULL;
1136 for(; !vfst.at_end(); vfst.next()) {
1137 // get method of frame
1138 methodOop method = vfst.method();
1139 intptr_t* frame_id = vfst.frame_id();
1141 // check the privileged frames to see if we have a match
1142 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1143 // this frame is privileged
1144 is_privileged = true;
1145 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1146 protection_domain = thread->privileged_stack_top()->protection_domain();
1147 } else {
1148 protection_domain = instanceKlass::cast(method->method_holder())->protection_domain();
1149 }
1151 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1152 local_array->push(protection_domain);
1153 previous_protection_domain = protection_domain;
1154 }
1156 if (is_privileged) break;
1157 }
1160 // either all the domains on the stack were system domains, or
1161 // we had a privileged system domain
1162 if (local_array->is_empty()) {
1163 if (is_privileged && privileged_context.is_null()) return NULL;
1165 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1166 return JNIHandles::make_local(env, result);
1167 }
1169 // the resource area must be registered in case of a gc
1170 RegisterArrayForGC ragc(thread, local_array);
1171 objArrayOop context = oopFactory::new_objArray(SystemDictionary::protectionDomain_klass(),
1172 local_array->length(), CHECK_NULL);
1173 objArrayHandle h_context(thread, context);
1174 for (int index = 0; index < local_array->length(); index++) {
1175 h_context->obj_at_put(index, local_array->at(index));
1176 }
1178 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1180 return JNIHandles::make_local(env, result);
1181 JVM_END
1184 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1185 JVMWrapper("JVM_IsArrayClass");
1186 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1187 return (k != NULL) && Klass::cast(k)->oop_is_javaArray() ? true : false;
1188 JVM_END
1191 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1192 JVMWrapper("JVM_IsPrimitiveClass");
1193 oop mirror = JNIHandles::resolve_non_null(cls);
1194 return (jboolean) java_lang_Class::is_primitive(mirror);
1195 JVM_END
1198 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1199 JVMWrapper("JVM_GetComponentType");
1200 oop mirror = JNIHandles::resolve_non_null(cls);
1201 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1202 return (jclass) JNIHandles::make_local(env, result);
1203 JVM_END
1206 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1207 JVMWrapper("JVM_GetClassModifiers");
1208 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1209 // Primitive type
1210 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1211 }
1213 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1214 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1215 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1216 return k->modifier_flags();
1217 JVM_END
1220 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1222 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1223 const int inner_class_info_index = 0;
1224 const int outer_class_info_index = 1;
1226 JvmtiVMObjectAllocEventCollector oam;
1227 // ofClass is a reference to a java_lang_Class object. The mirror object
1228 // of an instanceKlass
1230 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1231 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1232 oop result = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL);
1233 return (jobjectArray)JNIHandles::make_local(env, result);
1234 }
1236 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1238 if (k->inner_classes()->length() == 0) {
1239 // Neither an inner nor outer class
1240 oop result = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL);
1241 return (jobjectArray)JNIHandles::make_local(env, result);
1242 }
1244 // find inner class info
1245 typeArrayHandle icls(thread, k->inner_classes());
1246 constantPoolHandle cp(thread, k->constants());
1247 int length = icls->length();
1249 // Allocate temp. result array
1250 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), length/4, CHECK_NULL);
1251 objArrayHandle result (THREAD, r);
1252 int members = 0;
1254 for(int i = 0; i < length; i += 4) {
1255 int ioff = icls->ushort_at(i + inner_class_info_index);
1256 int ooff = icls->ushort_at(i + outer_class_info_index);
1258 if (ioff != 0 && ooff != 0) {
1259 // Check to see if the name matches the class we're looking for
1260 // before attempting to find the class.
1261 if (cp->klass_name_at_matches(k, ooff)) {
1262 klassOop outer_klass = cp->klass_at(ooff, CHECK_NULL);
1263 if (outer_klass == k()) {
1264 klassOop ik = cp->klass_at(ioff, CHECK_NULL);
1265 instanceKlassHandle inner_klass (THREAD, ik);
1267 // Throws an exception if outer klass has not declared k as
1268 // an inner klass
1269 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1271 result->obj_at_put(members, inner_klass->java_mirror());
1272 members++;
1273 }
1274 }
1275 }
1276 }
1278 if (members != length) {
1279 // Return array of right length
1280 objArrayOop res = oopFactory::new_objArray(SystemDictionary::class_klass(), members, CHECK_NULL);
1281 for(int i = 0; i < members; i++) {
1282 res->obj_at_put(i, result->obj_at(i));
1283 }
1284 return (jobjectArray)JNIHandles::make_local(env, res);
1285 }
1287 return (jobjectArray)JNIHandles::make_local(env, result());
1288 JVM_END
1291 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1292 {
1293 // ofClass is a reference to a java_lang_Class object.
1294 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1295 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1296 return NULL;
1297 }
1299 symbolOop simple_name = NULL;
1300 klassOop outer_klass
1301 = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))
1302 )->compute_enclosing_class(simple_name, CHECK_NULL);
1303 if (outer_klass == NULL) return NULL; // already a top-level class
1304 if (simple_name == NULL) return NULL; // an anonymous class (inside a method)
1305 return (jclass) JNIHandles::make_local(env, Klass::cast(outer_klass)->java_mirror());
1306 }
1307 JVM_END
1309 // should be in instanceKlass.cpp, but is here for historical reasons
1310 klassOop instanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1311 symbolOop& simple_name_result, TRAPS) {
1312 Thread* thread = THREAD;
1313 const int inner_class_info_index = inner_class_inner_class_info_offset;
1314 const int outer_class_info_index = inner_class_outer_class_info_offset;
1316 if (k->inner_classes()->length() == 0) {
1317 // No inner class info => no declaring class
1318 return NULL;
1319 }
1321 typeArrayHandle i_icls(thread, k->inner_classes());
1322 constantPoolHandle i_cp(thread, k->constants());
1323 int i_length = i_icls->length();
1325 bool found = false;
1326 klassOop ok;
1327 instanceKlassHandle outer_klass;
1328 bool inner_is_member = false;
1329 int simple_name_index = 0;
1331 // Find inner_klass attribute
1332 for (int i = 0; i < i_length && !found; i += inner_class_next_offset) {
1333 int ioff = i_icls->ushort_at(i + inner_class_info_index);
1334 int ooff = i_icls->ushort_at(i + outer_class_info_index);
1335 int noff = i_icls->ushort_at(i + inner_class_inner_name_offset);
1336 if (ioff != 0) {
1337 // Check to see if the name matches the class we're looking for
1338 // before attempting to find the class.
1339 if (i_cp->klass_name_at_matches(k, ioff)) {
1340 klassOop inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1341 found = (k() == inner_klass);
1342 if (found && ooff != 0) {
1343 ok = i_cp->klass_at(ooff, CHECK_NULL);
1344 outer_klass = instanceKlassHandle(thread, ok);
1345 simple_name_index = noff;
1346 inner_is_member = true;
1347 }
1348 }
1349 }
1350 }
1352 if (found && outer_klass.is_null()) {
1353 // It may be anonymous; try for that.
1354 int encl_method_class_idx = k->enclosing_method_class_index();
1355 if (encl_method_class_idx != 0) {
1356 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1357 outer_klass = instanceKlassHandle(thread, ok);
1358 inner_is_member = false;
1359 }
1360 }
1362 // If no inner class attribute found for this class.
1363 if (outer_klass.is_null()) return NULL;
1365 // Throws an exception if outer klass has not declared k as an inner klass
1366 // We need evidence that each klass knows about the other, or else
1367 // the system could allow a spoof of an inner class to gain access rights.
1368 Reflection::check_for_inner_class(outer_klass, k, inner_is_member, CHECK_NULL);
1370 simple_name_result = (inner_is_member ? i_cp->symbol_at(simple_name_index) : symbolOop(NULL));
1371 return outer_klass();
1372 }
1374 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1375 assert (cls != NULL, "illegal class");
1376 JVMWrapper("JVM_GetClassSignature");
1377 JvmtiVMObjectAllocEventCollector oam;
1378 ResourceMark rm(THREAD);
1379 // Return null for arrays and primatives
1380 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1381 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1382 if (Klass::cast(k)->oop_is_instance()) {
1383 symbolHandle sym = symbolHandle(THREAD, instanceKlass::cast(k)->generic_signature());
1384 if (sym.is_null()) return NULL;
1385 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1386 return (jstring) JNIHandles::make_local(env, str());
1387 }
1388 }
1389 return NULL;
1390 JVM_END
1393 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1394 assert (cls != NULL, "illegal class");
1395 JVMWrapper("JVM_GetClassAnnotations");
1396 ResourceMark rm(THREAD);
1397 // Return null for arrays and primitives
1398 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1399 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1400 if (Klass::cast(k)->oop_is_instance()) {
1401 return (jbyteArray) JNIHandles::make_local(env,
1402 instanceKlass::cast(k)->class_annotations());
1403 }
1404 }
1405 return NULL;
1406 JVM_END
1409 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1410 assert(field != NULL, "illegal field");
1411 JVMWrapper("JVM_GetFieldAnnotations");
1413 // some of this code was adapted from from jni_FromReflectedField
1415 // field is a handle to a java.lang.reflect.Field object
1416 oop reflected = JNIHandles::resolve_non_null(field);
1417 oop mirror = java_lang_reflect_Field::clazz(reflected);
1418 klassOop k = java_lang_Class::as_klassOop(mirror);
1419 int slot = java_lang_reflect_Field::slot(reflected);
1420 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1422 fieldDescriptor fd;
1423 KlassHandle kh(THREAD, k);
1424 intptr_t offset = instanceKlass::cast(kh())->offset_from_fields(slot);
1426 if (modifiers & JVM_ACC_STATIC) {
1427 // for static fields we only look in the current class
1428 if (!instanceKlass::cast(kh())->find_local_field_from_offset(offset,
1429 true, &fd)) {
1430 assert(false, "cannot find static field");
1431 return NULL; // robustness
1432 }
1433 } else {
1434 // for instance fields we start with the current class and work
1435 // our way up through the superclass chain
1436 if (!instanceKlass::cast(kh())->find_field_from_offset(offset, false,
1437 &fd)) {
1438 assert(false, "cannot find instance field");
1439 return NULL; // robustness
1440 }
1441 }
1443 return (jbyteArray) JNIHandles::make_local(env, fd.annotations());
1444 JVM_END
1447 static methodOop jvm_get_method_common(jobject method, TRAPS) {
1448 // some of this code was adapted from from jni_FromReflectedMethod
1450 oop reflected = JNIHandles::resolve_non_null(method);
1451 oop mirror = NULL;
1452 int slot = 0;
1454 if (reflected->klass() == SystemDictionary::reflect_constructor_klass()) {
1455 mirror = java_lang_reflect_Constructor::clazz(reflected);
1456 slot = java_lang_reflect_Constructor::slot(reflected);
1457 } else {
1458 assert(reflected->klass() == SystemDictionary::reflect_method_klass(),
1459 "wrong type");
1460 mirror = java_lang_reflect_Method::clazz(reflected);
1461 slot = java_lang_reflect_Method::slot(reflected);
1462 }
1463 klassOop k = java_lang_Class::as_klassOop(mirror);
1465 KlassHandle kh(THREAD, k);
1466 methodOop m = instanceKlass::cast(kh())->method_with_idnum(slot);
1467 if (m == NULL) {
1468 assert(false, "cannot find method");
1469 return NULL; // robustness
1470 }
1472 return m;
1473 }
1476 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1477 JVMWrapper("JVM_GetMethodAnnotations");
1479 // method is a handle to a java.lang.reflect.Method object
1480 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1481 return (jbyteArray) JNIHandles::make_local(env, m->annotations());
1482 JVM_END
1485 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1486 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1488 // method is a handle to a java.lang.reflect.Method object
1489 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1490 return (jbyteArray) JNIHandles::make_local(env, m->annotation_default());
1491 JVM_END
1494 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1495 JVMWrapper("JVM_GetMethodParameterAnnotations");
1497 // method is a handle to a java.lang.reflect.Method object
1498 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1499 return (jbyteArray) JNIHandles::make_local(env, m->parameter_annotations());
1500 JVM_END
1503 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1505 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1506 {
1507 JVMWrapper("JVM_GetClassDeclaredFields");
1508 JvmtiVMObjectAllocEventCollector oam;
1510 // Exclude primitive types and array types
1511 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1512 Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1513 // Return empty array
1514 oop res = oopFactory::new_objArray(SystemDictionary::reflect_field_klass(), 0, CHECK_NULL);
1515 return (jobjectArray) JNIHandles::make_local(env, res);
1516 }
1518 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1519 constantPoolHandle cp(THREAD, k->constants());
1521 // Ensure class is linked
1522 k->link_class(CHECK_NULL);
1524 typeArrayHandle fields(THREAD, k->fields());
1525 int fields_len = fields->length();
1527 // 4496456 We need to filter out java.lang.Throwable.backtrace
1528 bool skip_backtrace = false;
1530 // Allocate result
1531 int num_fields;
1533 if (publicOnly) {
1534 num_fields = 0;
1535 for (int i = 0, j = 0; i < fields_len; i += instanceKlass::next_offset, j++) {
1536 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
1537 if (mods & JVM_ACC_PUBLIC) ++num_fields;
1538 }
1539 } else {
1540 num_fields = fields_len / instanceKlass::next_offset;
1542 if (k() == SystemDictionary::throwable_klass()) {
1543 num_fields--;
1544 skip_backtrace = true;
1545 }
1546 }
1548 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_field_klass(), num_fields, CHECK_NULL);
1549 objArrayHandle result (THREAD, r);
1551 int out_idx = 0;
1552 fieldDescriptor fd;
1553 for (int i = 0; i < fields_len; i += instanceKlass::next_offset) {
1554 if (skip_backtrace) {
1555 // 4496456 skip java.lang.Throwable.backtrace
1556 int offset = k->offset_from_fields(i);
1557 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1558 }
1560 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
1561 if (!publicOnly || (mods & JVM_ACC_PUBLIC)) {
1562 fd.initialize(k(), i);
1563 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1564 result->obj_at_put(out_idx, field);
1565 ++out_idx;
1566 }
1567 }
1568 assert(out_idx == num_fields, "just checking");
1569 return (jobjectArray) JNIHandles::make_local(env, result());
1570 }
1571 JVM_END
1573 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1574 {
1575 JVMWrapper("JVM_GetClassDeclaredMethods");
1576 JvmtiVMObjectAllocEventCollector oam;
1578 // Exclude primitive types and array types
1579 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1580 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1581 // Return empty array
1582 oop res = oopFactory::new_objArray(SystemDictionary::reflect_method_klass(), 0, CHECK_NULL);
1583 return (jobjectArray) JNIHandles::make_local(env, res);
1584 }
1586 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1588 // Ensure class is linked
1589 k->link_class(CHECK_NULL);
1591 objArrayHandle methods (THREAD, k->methods());
1592 int methods_length = methods->length();
1593 int num_methods = 0;
1595 int i;
1596 for (i = 0; i < methods_length; i++) {
1597 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1598 if (!method->is_initializer()) {
1599 if (!publicOnly || method->is_public()) {
1600 ++num_methods;
1601 }
1602 }
1603 }
1605 // Allocate result
1606 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_method_klass(), num_methods, CHECK_NULL);
1607 objArrayHandle result (THREAD, r);
1609 int out_idx = 0;
1610 for (i = 0; i < methods_length; i++) {
1611 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1612 if (!method->is_initializer()) {
1613 if (!publicOnly || method->is_public()) {
1614 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1615 result->obj_at_put(out_idx, m);
1616 ++out_idx;
1617 }
1618 }
1619 }
1620 assert(out_idx == num_methods, "just checking");
1621 return (jobjectArray) JNIHandles::make_local(env, result());
1622 }
1623 JVM_END
1625 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1626 {
1627 JVMWrapper("JVM_GetClassDeclaredConstructors");
1628 JvmtiVMObjectAllocEventCollector oam;
1630 // Exclude primitive types and array types
1631 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1632 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1633 // Return empty array
1634 oop res = oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), 0 , CHECK_NULL);
1635 return (jobjectArray) JNIHandles::make_local(env, res);
1636 }
1638 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1640 // Ensure class is linked
1641 k->link_class(CHECK_NULL);
1643 objArrayHandle methods (THREAD, k->methods());
1644 int methods_length = methods->length();
1645 int num_constructors = 0;
1647 int i;
1648 for (i = 0; i < methods_length; i++) {
1649 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1650 if (method->is_initializer() && !method->is_static()) {
1651 if (!publicOnly || method->is_public()) {
1652 ++num_constructors;
1653 }
1654 }
1655 }
1657 // Allocate result
1658 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), num_constructors, CHECK_NULL);
1659 objArrayHandle result(THREAD, r);
1661 int out_idx = 0;
1662 for (i = 0; i < methods_length; i++) {
1663 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1664 if (method->is_initializer() && !method->is_static()) {
1665 if (!publicOnly || method->is_public()) {
1666 oop m = Reflection::new_constructor(method, CHECK_NULL);
1667 result->obj_at_put(out_idx, m);
1668 ++out_idx;
1669 }
1670 }
1671 }
1672 assert(out_idx == num_constructors, "just checking");
1673 return (jobjectArray) JNIHandles::make_local(env, result());
1674 }
1675 JVM_END
1677 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1678 {
1679 JVMWrapper("JVM_GetClassAccessFlags");
1680 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1681 // Primitive type
1682 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1683 }
1685 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1686 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1687 }
1688 JVM_END
1691 // Constant pool access //////////////////////////////////////////////////////////
1693 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1694 {
1695 JVMWrapper("JVM_GetClassConstantPool");
1696 JvmtiVMObjectAllocEventCollector oam;
1698 // Return null for primitives and arrays
1699 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1700 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1701 if (Klass::cast(k)->oop_is_instance()) {
1702 instanceKlassHandle k_h(THREAD, k);
1703 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1704 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants());
1705 return JNIHandles::make_local(jcp());
1706 }
1707 }
1708 return NULL;
1709 }
1710 JVM_END
1713 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool))
1714 {
1715 JVMWrapper("JVM_ConstantPoolGetSize");
1716 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1717 return cp->length();
1718 }
1719 JVM_END
1722 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1723 if (!cp->is_within_bounds(index)) {
1724 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1725 }
1726 }
1729 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1730 {
1731 JVMWrapper("JVM_ConstantPoolGetClassAt");
1732 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1733 bounds_check(cp, index, CHECK_NULL);
1734 constantTag tag = cp->tag_at(index);
1735 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1736 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1737 }
1738 klassOop k = cp->klass_at(index, CHECK_NULL);
1739 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror());
1740 }
1741 JVM_END
1744 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1745 {
1746 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1747 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1748 bounds_check(cp, index, CHECK_NULL);
1749 constantTag tag = cp->tag_at(index);
1750 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1751 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1752 }
1753 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index);
1754 if (k == NULL) return NULL;
1755 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror());
1756 }
1757 JVM_END
1759 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1760 constantTag tag = cp->tag_at(index);
1761 if (!tag.is_method() && !tag.is_interface_method()) {
1762 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1763 }
1764 int klass_ref = cp->uncached_klass_ref_index_at(index);
1765 klassOop k_o;
1766 if (force_resolution) {
1767 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1768 } else {
1769 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1770 if (k_o == NULL) return NULL;
1771 }
1772 instanceKlassHandle k(THREAD, k_o);
1773 symbolOop name = cp->uncached_name_ref_at(index);
1774 symbolOop sig = cp->uncached_signature_ref_at(index);
1775 methodHandle m (THREAD, k->find_method(name, sig));
1776 if (m.is_null()) {
1777 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1778 }
1779 oop method;
1780 if (!m->is_initializer() || m->is_static()) {
1781 method = Reflection::new_method(m, true, true, CHECK_NULL);
1782 } else {
1783 method = Reflection::new_constructor(m, CHECK_NULL);
1784 }
1785 return JNIHandles::make_local(method);
1786 }
1788 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1789 {
1790 JVMWrapper("JVM_ConstantPoolGetMethodAt");
1791 JvmtiVMObjectAllocEventCollector oam;
1792 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1793 bounds_check(cp, index, CHECK_NULL);
1794 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1795 return res;
1796 }
1797 JVM_END
1799 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1800 {
1801 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1802 JvmtiVMObjectAllocEventCollector oam;
1803 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1804 bounds_check(cp, index, CHECK_NULL);
1805 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1806 return res;
1807 }
1808 JVM_END
1810 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1811 constantTag tag = cp->tag_at(index);
1812 if (!tag.is_field()) {
1813 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1814 }
1815 int klass_ref = cp->uncached_klass_ref_index_at(index);
1816 klassOop k_o;
1817 if (force_resolution) {
1818 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1819 } else {
1820 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1821 if (k_o == NULL) return NULL;
1822 }
1823 instanceKlassHandle k(THREAD, k_o);
1824 symbolOop name = cp->uncached_name_ref_at(index);
1825 symbolOop sig = cp->uncached_signature_ref_at(index);
1826 fieldDescriptor fd;
1827 klassOop target_klass = k->find_field(name, sig, &fd);
1828 if (target_klass == NULL) {
1829 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
1830 }
1831 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
1832 return JNIHandles::make_local(field);
1833 }
1835 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1836 {
1837 JVMWrapper("JVM_ConstantPoolGetFieldAt");
1838 JvmtiVMObjectAllocEventCollector oam;
1839 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1840 bounds_check(cp, index, CHECK_NULL);
1841 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
1842 return res;
1843 }
1844 JVM_END
1846 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1847 {
1848 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
1849 JvmtiVMObjectAllocEventCollector oam;
1850 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1851 bounds_check(cp, index, CHECK_NULL);
1852 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
1853 return res;
1854 }
1855 JVM_END
1857 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1858 {
1859 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
1860 JvmtiVMObjectAllocEventCollector oam;
1861 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1862 bounds_check(cp, index, CHECK_NULL);
1863 constantTag tag = cp->tag_at(index);
1864 if (!tag.is_field_or_method()) {
1865 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1866 }
1867 int klass_ref = cp->uncached_klass_ref_index_at(index);
1868 symbolHandle klass_name (THREAD, cp->klass_name_at(klass_ref));
1869 symbolHandle member_name(THREAD, cp->uncached_name_ref_at(index));
1870 symbolHandle member_sig (THREAD, cp->uncached_signature_ref_at(index));
1871 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::string_klass(), 3, CHECK_NULL);
1872 objArrayHandle dest(THREAD, dest_o);
1873 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
1874 dest->obj_at_put(0, str());
1875 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
1876 dest->obj_at_put(1, str());
1877 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
1878 dest->obj_at_put(2, str());
1879 return (jobjectArray) JNIHandles::make_local(dest());
1880 }
1881 JVM_END
1883 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1884 {
1885 JVMWrapper("JVM_ConstantPoolGetIntAt");
1886 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1887 bounds_check(cp, index, CHECK_0);
1888 constantTag tag = cp->tag_at(index);
1889 if (!tag.is_int()) {
1890 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1891 }
1892 return cp->int_at(index);
1893 }
1894 JVM_END
1896 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1897 {
1898 JVMWrapper("JVM_ConstantPoolGetLongAt");
1899 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1900 bounds_check(cp, index, CHECK_(0L));
1901 constantTag tag = cp->tag_at(index);
1902 if (!tag.is_long()) {
1903 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1904 }
1905 return cp->long_at(index);
1906 }
1907 JVM_END
1909 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1910 {
1911 JVMWrapper("JVM_ConstantPoolGetFloatAt");
1912 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1913 bounds_check(cp, index, CHECK_(0.0f));
1914 constantTag tag = cp->tag_at(index);
1915 if (!tag.is_float()) {
1916 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1917 }
1918 return cp->float_at(index);
1919 }
1920 JVM_END
1922 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1923 {
1924 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
1925 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1926 bounds_check(cp, index, CHECK_(0.0));
1927 constantTag tag = cp->tag_at(index);
1928 if (!tag.is_double()) {
1929 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1930 }
1931 return cp->double_at(index);
1932 }
1933 JVM_END
1935 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1936 {
1937 JVMWrapper("JVM_ConstantPoolGetStringAt");
1938 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1939 bounds_check(cp, index, CHECK_NULL);
1940 constantTag tag = cp->tag_at(index);
1941 if (!tag.is_string() && !tag.is_unresolved_string()) {
1942 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1943 }
1944 oop str = cp->string_at(index, CHECK_NULL);
1945 return (jstring) JNIHandles::make_local(str);
1946 }
1947 JVM_END
1949 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1950 {
1951 JVMWrapper("JVM_ConstantPoolGetUTF8At");
1952 JvmtiVMObjectAllocEventCollector oam;
1953 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1954 bounds_check(cp, index, CHECK_NULL);
1955 constantTag tag = cp->tag_at(index);
1956 if (!tag.is_symbol()) {
1957 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1958 }
1959 symbolOop sym_o = cp->symbol_at(index);
1960 symbolHandle sym(THREAD, sym_o);
1961 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1962 return (jstring) JNIHandles::make_local(str());
1963 }
1964 JVM_END
1967 // Assertion support. //////////////////////////////////////////////////////////
1969 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
1970 JVMWrapper("JVM_DesiredAssertionStatus");
1971 assert(cls != NULL, "bad class");
1973 oop r = JNIHandles::resolve(cls);
1974 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
1975 if (java_lang_Class::is_primitive(r)) return false;
1977 klassOop k = java_lang_Class::as_klassOop(r);
1978 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass");
1979 if (! Klass::cast(k)->oop_is_instance()) return false;
1981 ResourceMark rm(THREAD);
1982 const char* name = Klass::cast(k)->name()->as_C_string();
1983 bool system_class = Klass::cast(k)->class_loader() == NULL;
1984 return JavaAssertions::enabled(name, system_class);
1986 JVM_END
1989 // Return a new AssertionStatusDirectives object with the fields filled in with
1990 // command-line assertion arguments (i.e., -ea, -da).
1991 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
1992 JVMWrapper("JVM_AssertionStatusDirectives");
1993 JvmtiVMObjectAllocEventCollector oam;
1994 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
1995 return JNIHandles::make_local(env, asd);
1996 JVM_END
1998 // Verification ////////////////////////////////////////////////////////////////////////////////
2000 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2002 // RedefineClasses support: bug 6214132 caused verification to fail.
2003 // All functions from this section should call the jvmtiThreadSate function:
2004 // klassOop class_to_verify_considering_redefinition(klassOop klass).
2005 // The function returns a klassOop of the _scratch_class if the verifier
2006 // was invoked in the middle of the class redefinition.
2007 // Otherwise it returns its argument value which is the _the_class klassOop.
2008 // Please, refer to the description in the jvmtiThreadSate.hpp.
2010 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2011 JVMWrapper("JVM_GetClassNameUTF");
2012 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2013 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2014 return Klass::cast(k)->name()->as_utf8();
2015 JVM_END
2018 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2019 JVMWrapper("JVM_GetClassCPTypes");
2020 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2021 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2022 // types will have length zero if this is not an instanceKlass
2023 // (length is determined by call to JVM_GetClassCPEntriesCount)
2024 if (Klass::cast(k)->oop_is_instance()) {
2025 constantPoolOop cp = instanceKlass::cast(k)->constants();
2026 for (int index = cp->length() - 1; index >= 0; index--) {
2027 constantTag tag = cp->tag_at(index);
2028 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class :
2029 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value();
2030 }
2031 }
2032 JVM_END
2035 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2036 JVMWrapper("JVM_GetClassCPEntriesCount");
2037 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2038 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2039 if (!Klass::cast(k)->oop_is_instance())
2040 return 0;
2041 return instanceKlass::cast(k)->constants()->length();
2042 JVM_END
2045 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2046 JVMWrapper("JVM_GetClassFieldsCount");
2047 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2048 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2049 if (!Klass::cast(k)->oop_is_instance())
2050 return 0;
2051 return instanceKlass::cast(k)->fields()->length() / instanceKlass::next_offset;
2052 JVM_END
2055 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2056 JVMWrapper("JVM_GetClassMethodsCount");
2057 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2058 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2059 if (!Klass::cast(k)->oop_is_instance())
2060 return 0;
2061 return instanceKlass::cast(k)->methods()->length();
2062 JVM_END
2065 // The following methods, used for the verifier, are never called with
2066 // array klasses, so a direct cast to instanceKlass is safe.
2067 // Typically, these methods are called in a loop with bounds determined
2068 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2069 // zero for arrays.
2070 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2071 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2072 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2073 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2074 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2075 int length = methodOop(method)->checked_exceptions_length();
2076 if (length > 0) {
2077 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start();
2078 for (int i = 0; i < length; i++) {
2079 exceptions[i] = table[i].class_cp_index;
2080 }
2081 }
2082 JVM_END
2085 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2086 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2087 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2088 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2089 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2090 return methodOop(method)->checked_exceptions_length();
2091 JVM_END
2094 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2095 JVMWrapper("JVM_GetMethodIxByteCode");
2096 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2097 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2098 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2099 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size());
2100 JVM_END
2103 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2104 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2105 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2106 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2107 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2108 return methodOop(method)->code_size();
2109 JVM_END
2112 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2113 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2114 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2115 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2116 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2117 typeArrayOop extable = methodOop(method)->exception_table();
2118 entry->start_pc = extable->int_at(entry_index * 4);
2119 entry->end_pc = extable->int_at(entry_index * 4 + 1);
2120 entry->handler_pc = extable->int_at(entry_index * 4 + 2);
2121 entry->catchType = extable->int_at(entry_index * 4 + 3);
2122 JVM_END
2125 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2126 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2127 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2128 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2129 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2130 return methodOop(method)->exception_table()->length() / 4;
2131 JVM_END
2134 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2135 JVMWrapper("JVM_GetMethodIxModifiers");
2136 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2137 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2138 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2139 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2140 JVM_END
2143 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2144 JVMWrapper("JVM_GetFieldIxModifiers");
2145 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2146 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2147 typeArrayOop fields = instanceKlass::cast(k)->fields();
2148 return fields->ushort_at(field_index * instanceKlass::next_offset + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2149 JVM_END
2152 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2153 JVMWrapper("JVM_GetMethodIxLocalsCount");
2154 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2155 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2156 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2157 return methodOop(method)->max_locals();
2158 JVM_END
2161 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2162 JVMWrapper("JVM_GetMethodIxArgsSize");
2163 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2164 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2165 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2166 return methodOop(method)->size_of_parameters();
2167 JVM_END
2170 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2171 JVMWrapper("JVM_GetMethodIxMaxStack");
2172 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2173 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2174 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2175 return methodOop(method)->max_stack();
2176 JVM_END
2179 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2180 JVMWrapper("JVM_IsConstructorIx");
2181 ResourceMark rm(THREAD);
2182 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2183 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2184 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2185 return methodOop(method)->name() == vmSymbols::object_initializer_name();
2186 JVM_END
2189 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2190 JVMWrapper("JVM_GetMethodIxIxUTF");
2191 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2192 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2193 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2194 return methodOop(method)->name()->as_utf8();
2195 JVM_END
2198 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2199 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2200 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2201 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2202 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2203 return methodOop(method)->signature()->as_utf8();
2204 JVM_END
2206 /**
2207 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2208 * read entries in the constant pool. Since the old verifier always
2209 * works on a copy of the code, it will not see any rewriting that
2210 * may possibly occur in the middle of verification. So it is important
2211 * that nothing it calls tries to use the cpCache instead of the raw
2212 * constant pool, so we must use cp->uncached_x methods when appropriate.
2213 */
2214 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2215 JVMWrapper("JVM_GetCPFieldNameUTF");
2216 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2217 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2218 constantPoolOop cp = instanceKlass::cast(k)->constants();
2219 switch (cp->tag_at(cp_index).value()) {
2220 case JVM_CONSTANT_Fieldref:
2221 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2222 default:
2223 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2224 }
2225 ShouldNotReachHere();
2226 return NULL;
2227 JVM_END
2230 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2231 JVMWrapper("JVM_GetCPMethodNameUTF");
2232 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2233 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2234 constantPoolOop cp = instanceKlass::cast(k)->constants();
2235 switch (cp->tag_at(cp_index).value()) {
2236 case JVM_CONSTANT_InterfaceMethodref:
2237 case JVM_CONSTANT_Methodref:
2238 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2239 case JVM_CONSTANT_NameAndType:
2240 // for invokedynamic
2241 return cp->nt_name_ref_at(cp_index)->as_utf8();
2242 default:
2243 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2244 }
2245 ShouldNotReachHere();
2246 return NULL;
2247 JVM_END
2250 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2251 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2252 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2253 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2254 constantPoolOop cp = instanceKlass::cast(k)->constants();
2255 switch (cp->tag_at(cp_index).value()) {
2256 case JVM_CONSTANT_InterfaceMethodref:
2257 case JVM_CONSTANT_Methodref:
2258 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2259 case JVM_CONSTANT_NameAndType:
2260 // for invokedynamic
2261 return cp->nt_signature_ref_at(cp_index)->as_utf8();
2262 default:
2263 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2264 }
2265 ShouldNotReachHere();
2266 return NULL;
2267 JVM_END
2270 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2271 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2272 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2273 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2274 constantPoolOop cp = instanceKlass::cast(k)->constants();
2275 switch (cp->tag_at(cp_index).value()) {
2276 case JVM_CONSTANT_Fieldref:
2277 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2278 default:
2279 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2280 }
2281 ShouldNotReachHere();
2282 return NULL;
2283 JVM_END
2286 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2287 JVMWrapper("JVM_GetCPClassNameUTF");
2288 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2289 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2290 constantPoolOop cp = instanceKlass::cast(k)->constants();
2291 symbolOop classname = cp->klass_name_at(cp_index);
2292 return classname->as_utf8();
2293 JVM_END
2296 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2297 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2298 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2299 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2300 constantPoolOop cp = instanceKlass::cast(k)->constants();
2301 switch (cp->tag_at(cp_index).value()) {
2302 case JVM_CONSTANT_Fieldref: {
2303 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2304 symbolOop classname = cp->klass_name_at(class_index);
2305 return classname->as_utf8();
2306 }
2307 default:
2308 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2309 }
2310 ShouldNotReachHere();
2311 return NULL;
2312 JVM_END
2315 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2316 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2317 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2318 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2319 constantPoolOop cp = instanceKlass::cast(k)->constants();
2320 switch (cp->tag_at(cp_index).value()) {
2321 case JVM_CONSTANT_Methodref:
2322 case JVM_CONSTANT_InterfaceMethodref: {
2323 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2324 symbolOop classname = cp->klass_name_at(class_index);
2325 return classname->as_utf8();
2326 }
2327 default:
2328 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2329 }
2330 ShouldNotReachHere();
2331 return NULL;
2332 JVM_END
2335 JVM_QUICK_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2336 JVMWrapper("JVM_GetCPFieldModifiers");
2337 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2338 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2339 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2340 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2341 constantPoolOop cp = instanceKlass::cast(k)->constants();
2342 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants();
2343 switch (cp->tag_at(cp_index).value()) {
2344 case JVM_CONSTANT_Fieldref: {
2345 symbolOop name = cp->uncached_name_ref_at(cp_index);
2346 symbolOop signature = cp->uncached_signature_ref_at(cp_index);
2347 typeArrayOop fields = instanceKlass::cast(k_called)->fields();
2348 int fields_count = fields->length();
2349 for (int i = 0; i < fields_count; i += instanceKlass::next_offset) {
2350 if (cp_called->symbol_at(fields->ushort_at(i + instanceKlass::name_index_offset)) == name &&
2351 cp_called->symbol_at(fields->ushort_at(i + instanceKlass::signature_index_offset)) == signature) {
2352 return fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2353 }
2354 }
2355 return -1;
2356 }
2357 default:
2358 fatal("JVM_GetCPFieldModifiers: illegal constant");
2359 }
2360 ShouldNotReachHere();
2361 return 0;
2362 JVM_END
2365 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2366 JVMWrapper("JVM_GetCPMethodModifiers");
2367 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2368 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2369 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2370 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2371 constantPoolOop cp = instanceKlass::cast(k)->constants();
2372 switch (cp->tag_at(cp_index).value()) {
2373 case JVM_CONSTANT_Methodref:
2374 case JVM_CONSTANT_InterfaceMethodref: {
2375 symbolOop name = cp->uncached_name_ref_at(cp_index);
2376 symbolOop signature = cp->uncached_signature_ref_at(cp_index);
2377 objArrayOop methods = instanceKlass::cast(k_called)->methods();
2378 int methods_count = methods->length();
2379 for (int i = 0; i < methods_count; i++) {
2380 methodOop method = methodOop(methods->obj_at(i));
2381 if (method->name() == name && method->signature() == signature) {
2382 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2383 }
2384 }
2385 return -1;
2386 }
2387 default:
2388 fatal("JVM_GetCPMethodModifiers: illegal constant");
2389 }
2390 ShouldNotReachHere();
2391 return 0;
2392 JVM_END
2395 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2397 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2398 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2399 JVM_END
2402 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2403 JVMWrapper("JVM_IsSameClassPackage");
2404 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2405 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2406 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror);
2407 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror);
2408 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2409 JVM_END
2412 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2414 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2415 JVMWrapper2("JVM_Open (%s)", fname);
2417 //%note jvm_r6
2418 int result = hpi::open(fname, flags, mode);
2419 if (result >= 0) {
2420 return result;
2421 } else {
2422 switch(errno) {
2423 case EEXIST:
2424 return JVM_EEXIST;
2425 default:
2426 return -1;
2427 }
2428 }
2429 JVM_END
2432 JVM_LEAF(jint, JVM_Close(jint fd))
2433 JVMWrapper2("JVM_Close (0x%x)", fd);
2434 //%note jvm_r6
2435 return hpi::close(fd);
2436 JVM_END
2439 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2440 JVMWrapper2("JVM_Read (0x%x)", fd);
2442 //%note jvm_r6
2443 return (jint)hpi::read(fd, buf, nbytes);
2444 JVM_END
2447 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2448 JVMWrapper2("JVM_Write (0x%x)", fd);
2450 //%note jvm_r6
2451 return (jint)hpi::write(fd, buf, nbytes);
2452 JVM_END
2455 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2456 JVMWrapper2("JVM_Available (0x%x)", fd);
2457 //%note jvm_r6
2458 return hpi::available(fd, pbytes);
2459 JVM_END
2462 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2463 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2464 //%note jvm_r6
2465 return hpi::lseek(fd, offset, whence);
2466 JVM_END
2469 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2470 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2471 return hpi::ftruncate(fd, length);
2472 JVM_END
2475 JVM_LEAF(jint, JVM_Sync(jint fd))
2476 JVMWrapper2("JVM_Sync (0x%x)", fd);
2477 //%note jvm_r6
2478 return hpi::fsync(fd);
2479 JVM_END
2482 // Printing support //////////////////////////////////////////////////
2483 extern "C" {
2485 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2486 // see bug 4399518, 4417214
2487 if ((intptr_t)count <= 0) return -1;
2488 return vsnprintf(str, count, fmt, args);
2489 }
2492 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2493 va_list args;
2494 int len;
2495 va_start(args, fmt);
2496 len = jio_vsnprintf(str, count, fmt, args);
2497 va_end(args);
2498 return len;
2499 }
2502 int jio_fprintf(FILE* f, const char *fmt, ...) {
2503 int len;
2504 va_list args;
2505 va_start(args, fmt);
2506 len = jio_vfprintf(f, fmt, args);
2507 va_end(args);
2508 return len;
2509 }
2512 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2513 if (Arguments::vfprintf_hook() != NULL) {
2514 return Arguments::vfprintf_hook()(f, fmt, args);
2515 } else {
2516 return vfprintf(f, fmt, args);
2517 }
2518 }
2521 int jio_printf(const char *fmt, ...) {
2522 int len;
2523 va_list args;
2524 va_start(args, fmt);
2525 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2526 va_end(args);
2527 return len;
2528 }
2531 // HotSpot specific jio method
2532 void jio_print(const char* s) {
2533 // Try to make this function as atomic as possible.
2534 if (Arguments::vfprintf_hook() != NULL) {
2535 jio_fprintf(defaultStream::output_stream(), "%s", s);
2536 } else {
2537 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2538 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2539 }
2540 }
2542 } // Extern C
2544 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2546 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2547 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2548 // OSThread objects. The exception to this rule is when the target object is the thread
2549 // doing the operation, in which case we know that the thread won't exit until the
2550 // operation is done (all exits being voluntary). There are a few cases where it is
2551 // rather silly to do operations on yourself, like resuming yourself or asking whether
2552 // you are alive. While these can still happen, they are not subject to deadlocks if
2553 // the lock is held while the operation occurs (this is not the case for suspend, for
2554 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2555 // implementation is local to this file, we always lock Threads_lock for that one.
2557 static void thread_entry(JavaThread* thread, TRAPS) {
2558 HandleMark hm(THREAD);
2559 Handle obj(THREAD, thread->threadObj());
2560 JavaValue result(T_VOID);
2561 JavaCalls::call_virtual(&result,
2562 obj,
2563 KlassHandle(THREAD, SystemDictionary::thread_klass()),
2564 vmSymbolHandles::run_method_name(),
2565 vmSymbolHandles::void_method_signature(),
2566 THREAD);
2567 }
2570 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2571 JVMWrapper("JVM_StartThread");
2572 JavaThread *native_thread = NULL;
2574 // We cannot hold the Threads_lock when we throw an exception,
2575 // due to rank ordering issues. Example: we might need to grab the
2576 // Heap_lock while we construct the exception.
2577 bool throw_illegal_thread_state = false;
2579 // We must release the Threads_lock before we can post a jvmti event
2580 // in Thread::start.
2581 {
2582 // Ensure that the C++ Thread and OSThread structures aren't freed before
2583 // we operate.
2584 MutexLocker mu(Threads_lock);
2586 // Check to see if we're running a thread that's already exited or was
2587 // stopped (is_stillborn) or is still active (thread is not NULL).
2588 if (java_lang_Thread::is_stillborn(JNIHandles::resolve_non_null(jthread)) ||
2589 java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2590 throw_illegal_thread_state = true;
2591 } else {
2592 jlong size =
2593 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2594 // Allocate the C++ Thread structure and create the native thread. The
2595 // stack size retrieved from java is signed, but the constructor takes
2596 // size_t (an unsigned type), so avoid passing negative values which would
2597 // result in really large stacks.
2598 size_t sz = size > 0 ? (size_t) size : 0;
2599 native_thread = new JavaThread(&thread_entry, sz);
2601 // At this point it may be possible that no osthread was created for the
2602 // JavaThread due to lack of memory. Check for this situation and throw
2603 // an exception if necessary. Eventually we may want to change this so
2604 // that we only grab the lock if the thread was created successfully -
2605 // then we can also do this check and throw the exception in the
2606 // JavaThread constructor.
2607 if (native_thread->osthread() != NULL) {
2608 // Note: the current thread is not being used within "prepare".
2609 native_thread->prepare(jthread);
2610 }
2611 }
2612 }
2614 if (throw_illegal_thread_state) {
2615 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2616 }
2618 assert(native_thread != NULL, "Starting null thread?");
2620 if (native_thread->osthread() == NULL) {
2621 // No one should hold a reference to the 'native_thread'.
2622 delete native_thread;
2623 if (JvmtiExport::should_post_resource_exhausted()) {
2624 JvmtiExport::post_resource_exhausted(
2625 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2626 "unable to create new native thread");
2627 }
2628 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2629 "unable to create new native thread");
2630 }
2632 Thread::start(native_thread);
2634 JVM_END
2636 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2637 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2638 // but is thought to be reliable and simple. In the case, where the receiver is the
2639 // save thread as the sender, no safepoint is needed.
2640 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2641 JVMWrapper("JVM_StopThread");
2643 oop java_throwable = JNIHandles::resolve(throwable);
2644 if (java_throwable == NULL) {
2645 THROW(vmSymbols::java_lang_NullPointerException());
2646 }
2647 oop java_thread = JNIHandles::resolve_non_null(jthread);
2648 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2649 Events::log("JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", receiver, (address)java_thread, throwable);
2650 // First check if thread already exited
2651 if (receiver != NULL) {
2652 // Check if exception is getting thrown at self (use oop equality, since the
2653 // target object might exit)
2654 if (java_thread == thread->threadObj()) {
2655 // This is a change from JDK 1.1, but JDK 1.2 will also do it:
2656 // NOTE (from JDK 1.2): this is done solely to prevent stopped
2657 // threads from being restarted.
2658 // Fix for 4314342, 4145910, perhaps others: it now doesn't have
2659 // any effect on the "liveness" of a thread; see
2660 // JVM_IsThreadAlive, below.
2661 if (java_throwable->is_a(SystemDictionary::threaddeath_klass())) {
2662 java_lang_Thread::set_stillborn(java_thread);
2663 }
2664 THROW_OOP(java_throwable);
2665 } else {
2666 // Enques a VM_Operation to stop all threads and then deliver the exception...
2667 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2668 }
2669 }
2670 JVM_END
2673 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2674 JVMWrapper("JVM_IsThreadAlive");
2676 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2677 return java_lang_Thread::is_alive(thread_oop);
2678 JVM_END
2681 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2682 JVMWrapper("JVM_SuspendThread");
2683 oop java_thread = JNIHandles::resolve_non_null(jthread);
2684 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2686 if (receiver != NULL) {
2687 // thread has run and has not exited (still on threads list)
2689 {
2690 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2691 if (receiver->is_external_suspend()) {
2692 // Don't allow nested external suspend requests. We can't return
2693 // an error from this interface so just ignore the problem.
2694 return;
2695 }
2696 if (receiver->is_exiting()) { // thread is in the process of exiting
2697 return;
2698 }
2699 receiver->set_external_suspend();
2700 }
2702 // java_suspend() will catch threads in the process of exiting
2703 // and will ignore them.
2704 receiver->java_suspend();
2706 // It would be nice to have the following assertion in all the
2707 // time, but it is possible for a racing resume request to have
2708 // resumed this thread right after we suspended it. Temporarily
2709 // enable this assertion if you are chasing a different kind of
2710 // bug.
2711 //
2712 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2713 // receiver->is_being_ext_suspended(), "thread is not suspended");
2714 }
2715 JVM_END
2718 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2719 JVMWrapper("JVM_ResumeThread");
2720 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2721 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2722 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2723 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2724 // looks at it.
2725 MutexLocker ml(Threads_lock);
2726 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2727 if (thr != NULL) {
2728 // the thread has run and is not in the process of exiting
2729 thr->java_resume();
2730 }
2731 JVM_END
2734 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2735 JVMWrapper("JVM_SetThreadPriority");
2736 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2737 MutexLocker ml(Threads_lock);
2738 oop java_thread = JNIHandles::resolve_non_null(jthread);
2739 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2740 JavaThread* thr = java_lang_Thread::thread(java_thread);
2741 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
2742 Thread::set_priority(thr, (ThreadPriority)prio);
2743 }
2744 JVM_END
2747 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2748 JVMWrapper("JVM_Yield");
2749 if (os::dont_yield()) return;
2750 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2751 // Critical for similar threading behaviour
2752 if (ConvertYieldToSleep) {
2753 os::sleep(thread, MinSleepInterval, false);
2754 } else {
2755 os::yield();
2756 }
2757 JVM_END
2760 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2761 JVMWrapper("JVM_Sleep");
2763 if (millis < 0) {
2764 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2765 }
2767 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2768 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2769 }
2771 // Save current thread state and restore it at the end of this block.
2772 // And set new thread state to SLEEPING.
2773 JavaThreadSleepState jtss(thread);
2775 if (millis == 0) {
2776 // When ConvertSleepToYield is on, this matches the classic VM implementation of
2777 // JVM_Sleep. Critical for similar threading behaviour (Win32)
2778 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
2779 // for SOLARIS
2780 if (ConvertSleepToYield) {
2781 os::yield();
2782 } else {
2783 ThreadState old_state = thread->osthread()->get_state();
2784 thread->osthread()->set_state(SLEEPING);
2785 os::sleep(thread, MinSleepInterval, false);
2786 thread->osthread()->set_state(old_state);
2787 }
2788 } else {
2789 ThreadState old_state = thread->osthread()->get_state();
2790 thread->osthread()->set_state(SLEEPING);
2791 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2792 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2793 // us while we were sleeping. We do not overwrite those.
2794 if (!HAS_PENDING_EXCEPTION) {
2795 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2796 // to properly restore the thread state. That's likely wrong.
2797 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2798 }
2799 }
2800 thread->osthread()->set_state(old_state);
2801 }
2802 JVM_END
2804 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2805 JVMWrapper("JVM_CurrentThread");
2806 oop jthread = thread->threadObj();
2807 assert (thread != NULL, "no current thread!");
2808 return JNIHandles::make_local(env, jthread);
2809 JVM_END
2812 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
2813 JVMWrapper("JVM_CountStackFrames");
2815 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2816 oop java_thread = JNIHandles::resolve_non_null(jthread);
2817 bool throw_illegal_thread_state = false;
2818 int count = 0;
2820 {
2821 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2822 // We need to re-resolve the java_thread, since a GC might have happened during the
2823 // acquire of the lock
2824 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2826 if (thr == NULL) {
2827 // do nothing
2828 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
2829 // Check whether this java thread has been suspended already. If not, throws
2830 // IllegalThreadStateException. We defer to throw that exception until
2831 // Threads_lock is released since loading exception class has to leave VM.
2832 // The correct way to test a thread is actually suspended is
2833 // wait_for_ext_suspend_completion(), but we can't call that while holding
2834 // the Threads_lock. The above tests are sufficient for our purposes
2835 // provided the walkability of the stack is stable - which it isn't
2836 // 100% but close enough for most practical purposes.
2837 throw_illegal_thread_state = true;
2838 } else {
2839 // Count all java activation, i.e., number of vframes
2840 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
2841 // Native frames are not counted
2842 if (!vfst.method()->is_native()) count++;
2843 }
2844 }
2845 }
2847 if (throw_illegal_thread_state) {
2848 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
2849 "this thread is not suspended");
2850 }
2851 return count;
2852 JVM_END
2854 // Consider: A better way to implement JVM_Interrupt() is to acquire
2855 // Threads_lock to resolve the jthread into a Thread pointer, fetch
2856 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
2857 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
2858 // outside the critical section. Threads_lock is hot so we want to minimize
2859 // the hold-time. A cleaner interface would be to decompose interrupt into
2860 // two steps. The 1st phase, performed under Threads_lock, would return
2861 // a closure that'd be invoked after Threads_lock was dropped.
2862 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
2863 // admit spurious wakeups.
2865 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
2866 JVMWrapper("JVM_Interrupt");
2868 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2869 oop java_thread = JNIHandles::resolve_non_null(jthread);
2870 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2871 // We need to re-resolve the java_thread, since a GC might have happened during the
2872 // acquire of the lock
2873 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2874 if (thr != NULL) {
2875 Thread::interrupt(thr);
2876 }
2877 JVM_END
2880 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
2881 JVMWrapper("JVM_IsInterrupted");
2883 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2884 oop java_thread = JNIHandles::resolve_non_null(jthread);
2885 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2886 // We need to re-resolve the java_thread, since a GC might have happened during the
2887 // acquire of the lock
2888 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2889 if (thr == NULL) {
2890 return JNI_FALSE;
2891 } else {
2892 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
2893 }
2894 JVM_END
2897 // Return true iff the current thread has locked the object passed in
2899 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
2900 JVMWrapper("JVM_HoldsLock");
2901 assert(THREAD->is_Java_thread(), "sanity check");
2902 if (obj == NULL) {
2903 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
2904 }
2905 Handle h_obj(THREAD, JNIHandles::resolve(obj));
2906 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
2907 JVM_END
2910 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
2911 JVMWrapper("JVM_DumpAllStacks");
2912 VM_PrintThreads op;
2913 VMThread::execute(&op);
2914 if (JvmtiExport::should_post_data_dump()) {
2915 JvmtiExport::post_data_dump();
2916 }
2917 JVM_END
2920 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
2922 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
2923 assert(jthread->is_Java_thread(), "must be a Java thread");
2924 if (jthread->privileged_stack_top() == NULL) return false;
2925 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
2926 oop loader = jthread->privileged_stack_top()->class_loader();
2927 if (loader == NULL) return true;
2928 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
2929 if (trusted) return true;
2930 }
2931 return false;
2932 }
2934 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
2935 JVMWrapper("JVM_CurrentLoadedClass");
2936 ResourceMark rm(THREAD);
2938 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
2939 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
2940 bool trusted = is_trusted_frame(thread, &vfst);
2941 if (trusted) return NULL;
2943 methodOop m = vfst.method();
2944 if (!m->is_native()) {
2945 klassOop holder = m->method_holder();
2946 oop loader = instanceKlass::cast(holder)->class_loader();
2947 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
2948 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror());
2949 }
2950 }
2951 }
2952 return NULL;
2953 JVM_END
2956 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
2957 JVMWrapper("JVM_CurrentClassLoader");
2958 ResourceMark rm(THREAD);
2960 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
2962 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
2963 bool trusted = is_trusted_frame(thread, &vfst);
2964 if (trusted) return NULL;
2966 methodOop m = vfst.method();
2967 if (!m->is_native()) {
2968 klassOop holder = m->method_holder();
2969 assert(holder->is_klass(), "just checking");
2970 oop loader = instanceKlass::cast(holder)->class_loader();
2971 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
2972 return JNIHandles::make_local(env, loader);
2973 }
2974 }
2975 }
2976 return NULL;
2977 JVM_END
2980 // Utility object for collecting method holders walking down the stack
2981 class KlassLink: public ResourceObj {
2982 public:
2983 KlassHandle klass;
2984 KlassLink* next;
2986 KlassLink(KlassHandle k) { klass = k; next = NULL; }
2987 };
2990 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
2991 JVMWrapper("JVM_GetClassContext");
2992 ResourceMark rm(THREAD);
2993 JvmtiVMObjectAllocEventCollector oam;
2994 // Collect linked list of (handles to) method holders
2995 KlassLink* first = NULL;
2996 KlassLink* last = NULL;
2997 int depth = 0;
2999 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) {
3000 // Native frames are not returned
3001 if (!vfst.method()->is_native()) {
3002 klassOop holder = vfst.method()->method_holder();
3003 assert(holder->is_klass(), "just checking");
3004 depth++;
3005 KlassLink* l = new KlassLink(KlassHandle(thread, holder));
3006 if (first == NULL) {
3007 first = last = l;
3008 } else {
3009 last->next = l;
3010 last = l;
3011 }
3012 }
3013 }
3015 // Create result array of type [Ljava/lang/Class;
3016 objArrayOop result = oopFactory::new_objArray(SystemDictionary::class_klass(), depth, CHECK_NULL);
3017 // Fill in mirrors corresponding to method holders
3018 int index = 0;
3019 while (first != NULL) {
3020 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror());
3021 first = first->next;
3022 }
3023 assert(index == depth, "just checking");
3025 return (jobjectArray) JNIHandles::make_local(env, result);
3026 JVM_END
3029 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3030 JVMWrapper("JVM_ClassDepth");
3031 ResourceMark rm(THREAD);
3032 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3033 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3035 const char* str = java_lang_String::as_utf8_string(class_name_str());
3036 symbolHandle class_name_sym =
3037 symbolHandle(THREAD, SymbolTable::probe(str, (int)strlen(str)));
3038 if (class_name_sym.is_null()) {
3039 return -1;
3040 }
3042 int depth = 0;
3044 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3045 if (!vfst.method()->is_native()) {
3046 klassOop holder = vfst.method()->method_holder();
3047 assert(holder->is_klass(), "just checking");
3048 if (instanceKlass::cast(holder)->name() == class_name_sym()) {
3049 return depth;
3050 }
3051 depth++;
3052 }
3053 }
3054 return -1;
3055 JVM_END
3058 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3059 JVMWrapper("JVM_ClassLoaderDepth");
3060 ResourceMark rm(THREAD);
3061 int depth = 0;
3062 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3063 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3064 bool trusted = is_trusted_frame(thread, &vfst);
3065 if (trusted) return -1;
3067 methodOop m = vfst.method();
3068 if (!m->is_native()) {
3069 klassOop holder = m->method_holder();
3070 assert(holder->is_klass(), "just checking");
3071 oop loader = instanceKlass::cast(holder)->class_loader();
3072 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3073 return depth;
3074 }
3075 depth++;
3076 }
3077 }
3078 return -1;
3079 JVM_END
3082 // java.lang.Package ////////////////////////////////////////////////////////////////
3085 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3086 JVMWrapper("JVM_GetSystemPackage");
3087 ResourceMark rm(THREAD);
3088 JvmtiVMObjectAllocEventCollector oam;
3089 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3090 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3091 return (jstring) JNIHandles::make_local(result);
3092 JVM_END
3095 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3096 JVMWrapper("JVM_GetSystemPackages");
3097 JvmtiVMObjectAllocEventCollector oam;
3098 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3099 return (jobjectArray) JNIHandles::make_local(result);
3100 JVM_END
3103 // ObjectInputStream ///////////////////////////////////////////////////////////////
3105 bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) {
3106 if (current_class == NULL) {
3107 return true;
3108 }
3109 if ((current_class == field_class) || access.is_public()) {
3110 return true;
3111 }
3113 if (access.is_protected()) {
3114 // See if current_class is a subclass of field_class
3115 if (Klass::cast(current_class)->is_subclass_of(field_class)) {
3116 return true;
3117 }
3118 }
3120 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class));
3121 }
3124 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3125 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3126 JVMWrapper("JVM_AllocateNewObject");
3127 JvmtiVMObjectAllocEventCollector oam;
3128 // Receiver is not used
3129 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3130 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3132 // Cannot instantiate primitive types
3133 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3134 ResourceMark rm(THREAD);
3135 THROW_0(vmSymbols::java_lang_InvalidClassException());
3136 }
3138 // Arrays not allowed here, must use JVM_AllocateNewArray
3139 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() ||
3140 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) {
3141 ResourceMark rm(THREAD);
3142 THROW_0(vmSymbols::java_lang_InvalidClassException());
3143 }
3145 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror));
3146 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror));
3148 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3150 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3151 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3153 // Make sure klass is initialized, since we are about to instantiate one of them.
3154 curr_klass->initialize(CHECK_NULL);
3156 methodHandle m (THREAD,
3157 init_klass->find_method(vmSymbols::object_initializer_name(),
3158 vmSymbols::void_method_signature()));
3159 if (m.is_null()) {
3160 ResourceMark rm(THREAD);
3161 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3162 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()),
3163 vmSymbols::object_initializer_name(),
3164 vmSymbols::void_method_signature()));
3165 }
3167 if (curr_klass == init_klass && !m->is_public()) {
3168 // Calling the constructor for class 'curr_klass'.
3169 // Only allow calls to a public no-arg constructor.
3170 // This path corresponds to creating an Externalizable object.
3171 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3172 }
3174 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3175 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3176 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3177 }
3179 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3180 // Call constructor m. This might call a constructor higher up in the hierachy
3181 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3183 return JNIHandles::make_local(obj());
3184 JVM_END
3187 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3188 JVMWrapper("JVM_AllocateNewArray");
3189 JvmtiVMObjectAllocEventCollector oam;
3190 oop mirror = JNIHandles::resolve_non_null(currClass);
3192 if (java_lang_Class::is_primitive(mirror)) {
3193 THROW_0(vmSymbols::java_lang_InvalidClassException());
3194 }
3195 klassOop k = java_lang_Class::as_klassOop(mirror);
3196 oop result;
3198 if (k->klass_part()->oop_is_typeArray()) {
3199 // typeArray
3200 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3201 } else if (k->klass_part()->oop_is_objArray()) {
3202 // objArray
3203 objArrayKlassHandle oak(THREAD, k);
3204 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3205 result = oak->allocate(length, CHECK_NULL);
3206 } else {
3207 THROW_0(vmSymbols::java_lang_InvalidClassException());
3208 }
3209 return JNIHandles::make_local(env, result);
3210 JVM_END
3213 // Return the first non-null class loader up the execution stack, or null
3214 // if only code from the null class loader is on the stack.
3216 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3217 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3218 // UseNewReflection
3219 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3220 klassOop holder = vfst.method()->method_holder();
3221 oop loader = instanceKlass::cast(holder)->class_loader();
3222 if (loader != NULL) {
3223 return JNIHandles::make_local(env, loader);
3224 }
3225 }
3226 return NULL;
3227 JVM_END
3230 // Load a class relative to the most recent class on the stack with a non-null
3231 // classloader.
3232 // This function has been deprecated and should not be considered part of the
3233 // specified JVM interface.
3235 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3236 jclass currClass, jstring currClassName))
3237 JVMWrapper("JVM_LoadClass0");
3238 // Receiver is not used
3239 ResourceMark rm(THREAD);
3241 // Class name argument is not guaranteed to be in internal format
3242 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3243 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3245 const char* str = java_lang_String::as_utf8_string(string());
3247 if (str == NULL || (int)strlen(str) > symbolOopDesc::max_length()) {
3248 // It's impossible to create this class; the name cannot fit
3249 // into the constant pool.
3250 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3251 }
3253 symbolHandle name = oopFactory::new_symbol_handle(str, CHECK_NULL);
3254 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3255 // Find the most recent class on the stack with a non-null classloader
3256 oop loader = NULL;
3257 oop protection_domain = NULL;
3258 if (curr_klass.is_null()) {
3259 for (vframeStream vfst(thread);
3260 !vfst.at_end() && loader == NULL;
3261 vfst.next()) {
3262 if (!vfst.method()->is_native()) {
3263 klassOop holder = vfst.method()->method_holder();
3264 loader = instanceKlass::cast(holder)->class_loader();
3265 protection_domain = instanceKlass::cast(holder)->protection_domain();
3266 }
3267 }
3268 } else {
3269 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass());
3270 loader = instanceKlass::cast(curr_klass_oop)->class_loader();
3271 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain();
3272 }
3273 Handle h_loader(THREAD, loader);
3274 Handle h_prot (THREAD, protection_domain);
3275 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3276 false, thread);
3277 if (TraceClassResolution && result != NULL) {
3278 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));
3279 }
3280 return result;
3281 JVM_END
3284 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3287 // resolve array handle and check arguments
3288 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3289 if (arr == NULL) {
3290 THROW_0(vmSymbols::java_lang_NullPointerException());
3291 }
3292 oop a = JNIHandles::resolve_non_null(arr);
3293 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) {
3294 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3295 }
3296 return arrayOop(a);
3297 }
3300 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3301 JVMWrapper("JVM_GetArrayLength");
3302 arrayOop a = check_array(env, arr, false, CHECK_0);
3303 return a->length();
3304 JVM_END
3307 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3308 JVMWrapper("JVM_Array_Get");
3309 JvmtiVMObjectAllocEventCollector oam;
3310 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3311 jvalue value;
3312 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3313 oop box = Reflection::box(&value, type, CHECK_NULL);
3314 return JNIHandles::make_local(env, box);
3315 JVM_END
3318 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3319 JVMWrapper("JVM_GetPrimitiveArrayElement");
3320 jvalue value;
3321 value.i = 0; // to initialize value before getting used in CHECK
3322 arrayOop a = check_array(env, arr, true, CHECK_(value));
3323 assert(a->is_typeArray(), "just checking");
3324 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3325 BasicType wide_type = (BasicType) wCode;
3326 if (type != wide_type) {
3327 Reflection::widen(&value, type, wide_type, CHECK_(value));
3328 }
3329 return value;
3330 JVM_END
3333 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3334 JVMWrapper("JVM_SetArrayElement");
3335 arrayOop a = check_array(env, arr, false, CHECK);
3336 oop box = JNIHandles::resolve(val);
3337 jvalue value;
3338 value.i = 0; // to initialize value before getting used in CHECK
3339 BasicType value_type;
3340 if (a->is_objArray()) {
3341 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3342 value_type = Reflection::unbox_for_regular_object(box, &value);
3343 } else {
3344 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3345 }
3346 Reflection::array_set(&value, a, index, value_type, CHECK);
3347 JVM_END
3350 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3351 JVMWrapper("JVM_SetPrimitiveArrayElement");
3352 arrayOop a = check_array(env, arr, true, CHECK);
3353 assert(a->is_typeArray(), "just checking");
3354 BasicType value_type = (BasicType) vCode;
3355 Reflection::array_set(&v, a, index, value_type, CHECK);
3356 JVM_END
3359 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3360 JVMWrapper("JVM_NewArray");
3361 JvmtiVMObjectAllocEventCollector oam;
3362 oop element_mirror = JNIHandles::resolve(eltClass);
3363 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3364 return JNIHandles::make_local(env, result);
3365 JVM_END
3368 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3369 JVMWrapper("JVM_NewMultiArray");
3370 JvmtiVMObjectAllocEventCollector oam;
3371 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3372 oop element_mirror = JNIHandles::resolve(eltClass);
3373 assert(dim_array->is_typeArray(), "just checking");
3374 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3375 return JNIHandles::make_local(env, result);
3376 JVM_END
3379 // Networking library support ////////////////////////////////////////////////////////////////////
3381 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3382 JVMWrapper("JVM_InitializeSocketLibrary");
3383 return hpi::initialize_socket_library();
3384 JVM_END
3387 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3388 JVMWrapper("JVM_Socket");
3389 return hpi::socket(domain, type, protocol);
3390 JVM_END
3393 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3394 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3395 //%note jvm_r6
3396 return hpi::socket_close(fd);
3397 JVM_END
3400 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3401 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3402 //%note jvm_r6
3403 return hpi::socket_shutdown(fd, howto);
3404 JVM_END
3407 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3408 JVMWrapper2("JVM_Recv (0x%x)", fd);
3409 //%note jvm_r6
3410 return hpi::recv(fd, buf, nBytes, flags);
3411 JVM_END
3414 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3415 JVMWrapper2("JVM_Send (0x%x)", fd);
3416 //%note jvm_r6
3417 return hpi::send(fd, buf, nBytes, flags);
3418 JVM_END
3421 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3422 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3423 //%note jvm_r6
3424 return hpi::timeout(fd, timeout);
3425 JVM_END
3428 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3429 JVMWrapper2("JVM_Listen (0x%x)", fd);
3430 //%note jvm_r6
3431 return hpi::listen(fd, count);
3432 JVM_END
3435 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3436 JVMWrapper2("JVM_Connect (0x%x)", fd);
3437 //%note jvm_r6
3438 return hpi::connect(fd, him, len);
3439 JVM_END
3442 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3443 JVMWrapper2("JVM_Bind (0x%x)", fd);
3444 //%note jvm_r6
3445 return hpi::bind(fd, him, len);
3446 JVM_END
3449 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3450 JVMWrapper2("JVM_Accept (0x%x)", fd);
3451 //%note jvm_r6
3452 return hpi::accept(fd, him, (int *)len);
3453 JVM_END
3456 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3457 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3458 //%note jvm_r6
3459 return hpi::recvfrom(fd, buf, nBytes, flags, from, fromlen);
3460 JVM_END
3463 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3464 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3465 //%note jvm_r6
3466 return hpi::get_sock_name(fd, him, len);
3467 JVM_END
3470 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3471 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3472 //%note jvm_r6
3473 return hpi::sendto(fd, buf, len, flags, to, tolen);
3474 JVM_END
3477 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3478 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3479 //%note jvm_r6
3480 return hpi::socket_available(fd, pbytes);
3481 JVM_END
3484 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3485 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3486 //%note jvm_r6
3487 return hpi::get_sock_opt(fd, level, optname, optval, optlen);
3488 JVM_END
3491 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3492 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3493 //%note jvm_r6
3494 return hpi::set_sock_opt(fd, level, optname, optval, optlen);
3495 JVM_END
3497 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3498 JVMWrapper("JVM_GetHostName");
3499 return hpi::get_host_name(name, namelen);
3500 JVM_END
3502 #ifdef _WINDOWS
3504 JVM_LEAF(struct hostent*, JVM_GetHostByAddr(const char* name, int len, int type))
3505 JVMWrapper("JVM_GetHostByAddr");
3506 return hpi::get_host_by_addr(name, len, type);
3507 JVM_END
3510 JVM_LEAF(struct hostent*, JVM_GetHostByName(char* name))
3511 JVMWrapper("JVM_GetHostByName");
3512 return hpi::get_host_by_name(name);
3513 JVM_END
3516 JVM_LEAF(struct protoent*, JVM_GetProtoByName(char* name))
3517 JVMWrapper("JVM_GetProtoByName");
3518 return hpi::get_proto_by_name(name);
3519 JVM_END
3521 #endif
3523 // Library support ///////////////////////////////////////////////////////////////////////////
3525 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3526 //%note jvm_ct
3527 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3528 char ebuf[1024];
3529 void *load_result;
3530 {
3531 ThreadToNativeFromVM ttnfvm(thread);
3532 load_result = hpi::dll_load(name, ebuf, sizeof ebuf);
3533 }
3534 if (load_result == NULL) {
3535 char msg[1024];
3536 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3537 // Since 'ebuf' may contain a string encoded using
3538 // platform encoding scheme, we need to pass
3539 // Exceptions::unsafe_to_utf8 to the new_exception method
3540 // as the last argument. See bug 6367357.
3541 Handle h_exception =
3542 Exceptions::new_exception(thread,
3543 vmSymbols::java_lang_UnsatisfiedLinkError(),
3544 msg, Exceptions::unsafe_to_utf8);
3546 THROW_HANDLE_0(h_exception);
3547 }
3548 return load_result;
3549 JVM_END
3552 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3553 JVMWrapper("JVM_UnloadLibrary");
3554 hpi::dll_unload(handle);
3555 JVM_END
3558 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3559 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3560 return hpi::dll_lookup(handle, name);
3561 JVM_END
3563 // Floating point support ////////////////////////////////////////////////////////////////////
3565 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3566 JVMWrapper("JVM_IsNaN");
3567 return g_isnan(a);
3568 JVM_END
3572 // JNI version ///////////////////////////////////////////////////////////////////////////////
3574 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3575 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3576 return Threads::is_supported_jni_version_including_1_1(version);
3577 JVM_END
3580 // String support ///////////////////////////////////////////////////////////////////////////
3582 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3583 JVMWrapper("JVM_InternString");
3584 JvmtiVMObjectAllocEventCollector oam;
3585 if (str == NULL) return NULL;
3586 oop string = JNIHandles::resolve_non_null(str);
3587 oop result = StringTable::intern(string, CHECK_NULL);
3588 return (jstring) JNIHandles::make_local(env, result);
3589 JVM_END
3592 // Raw monitor support //////////////////////////////////////////////////////////////////////
3594 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3595 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3596 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3597 // that only works with java threads.
3600 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3601 VM_Exit::block_if_vm_exited();
3602 JVMWrapper("JVM_RawMonitorCreate");
3603 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3604 }
3607 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3608 VM_Exit::block_if_vm_exited();
3609 JVMWrapper("JVM_RawMonitorDestroy");
3610 delete ((Mutex*) mon);
3611 }
3614 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3615 VM_Exit::block_if_vm_exited();
3616 JVMWrapper("JVM_RawMonitorEnter");
3617 ((Mutex*) mon)->jvm_raw_lock();
3618 return 0;
3619 }
3622 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3623 VM_Exit::block_if_vm_exited();
3624 JVMWrapper("JVM_RawMonitorExit");
3625 ((Mutex*) mon)->jvm_raw_unlock();
3626 }
3629 // Support for Serialization
3631 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3632 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3633 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3634 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3636 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3637 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3638 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3639 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3642 void initialize_converter_functions() {
3643 if (JDK_Version::is_gte_jdk14x_version()) {
3644 // These functions only exist for compatibility with 1.3.1 and earlier
3645 return;
3646 }
3648 // called from universe_post_init()
3649 assert(
3650 int_bits_to_float_fn == NULL &&
3651 long_bits_to_double_fn == NULL &&
3652 float_to_int_bits_fn == NULL &&
3653 double_to_long_bits_fn == NULL ,
3654 "initialization done twice"
3655 );
3656 // initialize
3657 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3658 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3659 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3660 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3661 // verify
3662 assert(
3663 int_bits_to_float_fn != NULL &&
3664 long_bits_to_double_fn != NULL &&
3665 float_to_int_bits_fn != NULL &&
3666 double_to_long_bits_fn != NULL ,
3667 "initialization failed"
3668 );
3669 }
3672 // Serialization
3673 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3674 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3675 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3677 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3678 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3679 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3680 oop o = JNIHandles::resolve(obj);
3682 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3683 THROW(vmSymbols::java_lang_NullPointerException());
3684 }
3686 jsize nfids = fids->length();
3687 if (nfids == 0) return;
3689 if (tcodes->length() < nfids) {
3690 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3691 }
3693 jsize off = 0;
3694 /* loop through fields, setting values */
3695 for (jsize i = 0; i < nfids; i++) {
3696 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3697 int field_offset;
3698 if (fid != NULL) {
3699 // NULL is a legal value for fid, but retrieving the field offset
3700 // trigger assertion in that case
3701 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3702 }
3704 switch (tcodes->char_at(i)) {
3705 case 'Z':
3706 if (fid != NULL) {
3707 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
3708 o->bool_field_put(field_offset, val);
3709 }
3710 off++;
3711 break;
3713 case 'B':
3714 if (fid != NULL) {
3715 o->byte_field_put(field_offset, dbuf->byte_at(off));
3716 }
3717 off++;
3718 break;
3720 case 'C':
3721 if (fid != NULL) {
3722 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3723 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3724 o->char_field_put(field_offset, val);
3725 }
3726 off += 2;
3727 break;
3729 case 'S':
3730 if (fid != NULL) {
3731 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3732 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3733 o->short_field_put(field_offset, val);
3734 }
3735 off += 2;
3736 break;
3738 case 'I':
3739 if (fid != NULL) {
3740 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3741 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3742 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3743 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3744 o->int_field_put(field_offset, ival);
3745 }
3746 off += 4;
3747 break;
3749 case 'F':
3750 if (fid != NULL) {
3751 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3752 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3753 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3754 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3755 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
3756 o->float_field_put(field_offset, fval);
3757 }
3758 off += 4;
3759 break;
3761 case 'J':
3762 if (fid != NULL) {
3763 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3764 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3765 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3766 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3767 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3768 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3769 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3770 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3771 o->long_field_put(field_offset, lval);
3772 }
3773 off += 8;
3774 break;
3776 case 'D':
3777 if (fid != NULL) {
3778 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3779 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3780 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3781 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3782 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3783 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3784 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3785 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3786 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
3787 o->double_field_put(field_offset, dval);
3788 }
3789 off += 8;
3790 break;
3792 default:
3793 // Illegal typecode
3794 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3795 }
3796 }
3797 JVM_END
3800 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3801 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3802 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3804 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3805 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3806 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3807 oop o = JNIHandles::resolve(obj);
3809 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3810 THROW(vmSymbols::java_lang_NullPointerException());
3811 }
3813 jsize nfids = fids->length();
3814 if (nfids == 0) return;
3816 if (tcodes->length() < nfids) {
3817 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3818 }
3820 /* loop through fields, fetching values */
3821 jsize off = 0;
3822 for (jsize i = 0; i < nfids; i++) {
3823 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3824 if (fid == NULL) {
3825 THROW(vmSymbols::java_lang_NullPointerException());
3826 }
3827 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3829 switch (tcodes->char_at(i)) {
3830 case 'Z':
3831 {
3832 jboolean val = o->bool_field(field_offset);
3833 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
3834 }
3835 break;
3837 case 'B':
3838 dbuf->byte_at_put(off++, o->byte_field(field_offset));
3839 break;
3841 case 'C':
3842 {
3843 jchar val = o->char_field(field_offset);
3844 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3845 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3846 }
3847 break;
3849 case 'S':
3850 {
3851 jshort val = o->short_field(field_offset);
3852 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3853 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3854 }
3855 break;
3857 case 'I':
3858 {
3859 jint val = o->int_field(field_offset);
3860 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
3861 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
3862 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3863 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3864 }
3865 break;
3867 case 'F':
3868 {
3869 jfloat fval = o->float_field(field_offset);
3870 jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
3871 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
3872 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
3873 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF);
3874 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF);
3875 }
3876 break;
3878 case 'J':
3879 {
3880 jlong val = o->long_field(field_offset);
3881 dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
3882 dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
3883 dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
3884 dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
3885 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
3886 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
3887 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3888 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3889 }
3890 break;
3892 case 'D':
3893 {
3894 jdouble dval = o->double_field(field_offset);
3895 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
3896 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
3897 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
3898 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
3899 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
3900 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
3901 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
3902 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF);
3903 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF);
3904 }
3905 break;
3907 default:
3908 // Illegal typecode
3909 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3910 }
3911 }
3912 JVM_END
3915 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3917 jclass find_class_from_class_loader(JNIEnv* env, symbolHandle name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
3918 // Security Note:
3919 // The Java level wrapper will perform the necessary security check allowing
3920 // us to pass the NULL as the initiating class loader.
3921 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3922 KlassHandle klass_handle(THREAD, klass);
3923 // Check if we should initialize the class
3924 if (init && klass_handle->oop_is_instance()) {
3925 klass_handle->initialize(CHECK_NULL);
3926 }
3927 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
3928 }
3931 // Internal SQE debugging support ///////////////////////////////////////////////////////////
3933 #ifndef PRODUCT
3935 extern "C" {
3936 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
3937 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
3938 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
3939 }
3941 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
3942 JVMWrapper("JVM_AccessBoolVMFlag");
3943 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
3944 JVM_END
3946 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
3947 JVMWrapper("JVM_AccessVMIntFlag");
3948 intx v;
3949 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
3950 *value = (jint)v;
3951 return result;
3952 JVM_END
3955 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
3956 JVMWrapper("JVM_VMBreakPoint");
3957 oop the_obj = JNIHandles::resolve(obj);
3958 BREAKPOINT;
3959 JVM_END
3962 #endif
3965 //---------------------------------------------------------------------------
3966 //
3967 // Support for old native code-based reflection (pre-JDK 1.4)
3968 // Disabled by default in the product build.
3969 //
3970 // See reflection.hpp for information on SUPPORT_OLD_REFLECTION
3971 //
3972 //---------------------------------------------------------------------------
3974 #ifdef SUPPORT_OLD_REFLECTION
3976 JVM_ENTRY(jobjectArray, JVM_GetClassFields(JNIEnv *env, jclass cls, jint which))
3977 JVMWrapper("JVM_GetClassFields");
3978 JvmtiVMObjectAllocEventCollector oam;
3979 oop mirror = JNIHandles::resolve_non_null(cls);
3980 objArrayOop result = Reflection::reflect_fields(mirror, which, CHECK_NULL);
3981 return (jobjectArray) JNIHandles::make_local(env, result);
3982 JVM_END
3985 JVM_ENTRY(jobjectArray, JVM_GetClassMethods(JNIEnv *env, jclass cls, jint which))
3986 JVMWrapper("JVM_GetClassMethods");
3987 JvmtiVMObjectAllocEventCollector oam;
3988 oop mirror = JNIHandles::resolve_non_null(cls);
3989 objArrayOop result = Reflection::reflect_methods(mirror, which, CHECK_NULL);
3990 //%note jvm_r4
3991 return (jobjectArray) JNIHandles::make_local(env, result);
3992 JVM_END
3995 JVM_ENTRY(jobjectArray, JVM_GetClassConstructors(JNIEnv *env, jclass cls, jint which))
3996 JVMWrapper("JVM_GetClassConstructors");
3997 JvmtiVMObjectAllocEventCollector oam;
3998 oop mirror = JNIHandles::resolve_non_null(cls);
3999 objArrayOop result = Reflection::reflect_constructors(mirror, which, CHECK_NULL);
4000 //%note jvm_r4
4001 return (jobjectArray) JNIHandles::make_local(env, result);
4002 JVM_END
4005 JVM_ENTRY(jobject, JVM_GetClassField(JNIEnv *env, jclass cls, jstring name, jint which))
4006 JVMWrapper("JVM_GetClassField");
4007 JvmtiVMObjectAllocEventCollector oam;
4008 if (name == NULL) return NULL;
4009 Handle str (THREAD, JNIHandles::resolve_non_null(name));
4011 const char* cstr = java_lang_String::as_utf8_string(str());
4012 symbolHandle field_name =
4013 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr)));
4014 if (field_name.is_null()) {
4015 THROW_0(vmSymbols::java_lang_NoSuchFieldException());
4016 }
4018 oop mirror = JNIHandles::resolve_non_null(cls);
4019 oop result = Reflection::reflect_field(mirror, field_name(), which, CHECK_NULL);
4020 if (result == NULL) {
4021 THROW_0(vmSymbols::java_lang_NoSuchFieldException());
4022 }
4023 return JNIHandles::make_local(env, result);
4024 JVM_END
4027 JVM_ENTRY(jobject, JVM_GetClassMethod(JNIEnv *env, jclass cls, jstring name, jobjectArray types, jint which))
4028 JVMWrapper("JVM_GetClassMethod");
4029 JvmtiVMObjectAllocEventCollector oam;
4030 if (name == NULL) {
4031 THROW_0(vmSymbols::java_lang_NullPointerException());
4032 }
4033 Handle str (THREAD, JNIHandles::resolve_non_null(name));
4035 const char* cstr = java_lang_String::as_utf8_string(str());
4036 symbolHandle method_name =
4037 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr)));
4038 if (method_name.is_null()) {
4039 THROW_0(vmSymbols::java_lang_NoSuchMethodException());
4040 }
4042 oop mirror = JNIHandles::resolve_non_null(cls);
4043 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types)));
4044 oop result = Reflection::reflect_method(mirror, method_name, tarray,
4045 which, CHECK_NULL);
4046 if (result == NULL) {
4047 THROW_0(vmSymbols::java_lang_NoSuchMethodException());
4048 }
4049 return JNIHandles::make_local(env, result);
4050 JVM_END
4053 JVM_ENTRY(jobject, JVM_GetClassConstructor(JNIEnv *env, jclass cls, jobjectArray types, jint which))
4054 JVMWrapper("JVM_GetClassConstructor");
4055 JvmtiVMObjectAllocEventCollector oam;
4056 oop mirror = JNIHandles::resolve_non_null(cls);
4057 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types)));
4058 oop result = Reflection::reflect_constructor(mirror, tarray, which, CHECK_NULL);
4059 if (result == NULL) {
4060 THROW_0(vmSymbols::java_lang_NoSuchMethodException());
4061 }
4062 return (jobject) JNIHandles::make_local(env, result);
4063 JVM_END
4066 // Instantiation ///////////////////////////////////////////////////////////////////////////////
4068 JVM_ENTRY(jobject, JVM_NewInstance(JNIEnv *env, jclass cls))
4069 JVMWrapper("JVM_NewInstance");
4070 Handle mirror(THREAD, JNIHandles::resolve_non_null(cls));
4072 methodOop resolved_constructor = java_lang_Class::resolved_constructor(mirror());
4073 if (resolved_constructor == NULL) {
4074 klassOop k = java_lang_Class::as_klassOop(mirror());
4075 // The java.lang.Class object caches a resolved constructor if all the checks
4076 // below were done successfully and a constructor was found.
4078 // Do class based checks
4079 if (java_lang_Class::is_primitive(mirror())) {
4080 const char* msg = "";
4081 if (mirror == Universe::bool_mirror()) msg = "java/lang/Boolean";
4082 else if (mirror == Universe::char_mirror()) msg = "java/lang/Character";
4083 else if (mirror == Universe::float_mirror()) msg = "java/lang/Float";
4084 else if (mirror == Universe::double_mirror()) msg = "java/lang/Double";
4085 else if (mirror == Universe::byte_mirror()) msg = "java/lang/Byte";
4086 else if (mirror == Universe::short_mirror()) msg = "java/lang/Short";
4087 else if (mirror == Universe::int_mirror()) msg = "java/lang/Integer";
4088 else if (mirror == Universe::long_mirror()) msg = "java/lang/Long";
4089 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), msg);
4090 }
4092 // Check whether we are allowed to instantiate this class
4093 Klass::cast(k)->check_valid_for_instantiation(false, CHECK_NULL); // Array classes get caught here
4094 instanceKlassHandle klass(THREAD, k);
4095 // Make sure class is initialized (also so all methods are rewritten)
4096 klass->initialize(CHECK_NULL);
4098 // Lookup default constructor
4099 resolved_constructor = klass->find_method(vmSymbols::object_initializer_name(), vmSymbols::void_method_signature());
4100 if (resolved_constructor == NULL) {
4101 ResourceMark rm(THREAD);
4102 THROW_MSG_0(vmSymbols::java_lang_InstantiationException(), klass->external_name());
4103 }
4105 // Cache result in java.lang.Class object. Does not have to be MT safe.
4106 java_lang_Class::set_resolved_constructor(mirror(), resolved_constructor);
4107 }
4109 assert(resolved_constructor != NULL, "sanity check");
4110 methodHandle constructor = methodHandle(THREAD, resolved_constructor);
4112 // We have an initialized instanceKlass with a default constructor
4113 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
4114 assert(klass->is_initialized() || klass->is_being_initialized(), "sanity check");
4116 // Do security check
4117 klassOop caller_klass = NULL;
4118 if (UsePrivilegedStack) {
4119 caller_klass = thread->security_get_caller_class(2);
4121 if (!Reflection::verify_class_access(caller_klass, klass(), false) ||
4122 !Reflection::verify_field_access(caller_klass,
4123 klass(),
4124 klass(),
4125 constructor->access_flags(),
4126 false,
4127 true)) {
4128 ResourceMark rm(THREAD);
4129 THROW_MSG_0(vmSymbols::java_lang_IllegalAccessException(), klass->external_name());
4130 }
4131 }
4133 // Allocate object and call constructor
4134 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
4135 JavaCalls::call_default_constructor(thread, constructor, receiver, CHECK_NULL);
4137 jobject res = JNIHandles::make_local(env, receiver());
4138 if (JvmtiExport::should_post_vm_object_alloc()) {
4139 JvmtiExport::post_vm_object_alloc(JavaThread::current(), receiver());
4140 }
4141 return res;
4142 JVM_END
4145 // Field ////////////////////////////////////////////////////////////////////////////////////////////
4147 JVM_ENTRY(jobject, JVM_GetField(JNIEnv *env, jobject field, jobject obj))
4148 JVMWrapper("JVM_GetField");
4149 JvmtiVMObjectAllocEventCollector oam;
4150 Handle field_mirror(thread, JNIHandles::resolve(field));
4151 Handle receiver (thread, JNIHandles::resolve(obj));
4152 fieldDescriptor fd;
4153 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_NULL);
4154 jvalue value;
4155 BasicType type = Reflection::field_get(&value, &fd, receiver);
4156 oop box = Reflection::box(&value, type, CHECK_NULL);
4157 return JNIHandles::make_local(env, box);
4158 JVM_END
4161 JVM_ENTRY(jvalue, JVM_GetPrimitiveField(JNIEnv *env, jobject field, jobject obj, unsigned char wCode))
4162 JVMWrapper("JVM_GetPrimitiveField");
4163 Handle field_mirror(thread, JNIHandles::resolve(field));
4164 Handle receiver (thread, JNIHandles::resolve(obj));
4165 fieldDescriptor fd;
4166 jvalue value;
4167 value.j = 0;
4168 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_(value));
4169 BasicType type = Reflection::field_get(&value, &fd, receiver);
4170 BasicType wide_type = (BasicType) wCode;
4171 if (type != wide_type) {
4172 Reflection::widen(&value, type, wide_type, CHECK_(value));
4173 }
4174 return value;
4175 JVM_END // should really be JVM_END, but that doesn't work for union types!
4178 JVM_ENTRY(void, JVM_SetField(JNIEnv *env, jobject field, jobject obj, jobject val))
4179 JVMWrapper("JVM_SetField");
4180 Handle field_mirror(thread, JNIHandles::resolve(field));
4181 Handle receiver (thread, JNIHandles::resolve(obj));
4182 oop box = JNIHandles::resolve(val);
4183 fieldDescriptor fd;
4184 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK);
4185 BasicType field_type = fd.field_type();
4186 jvalue value;
4187 BasicType value_type;
4188 if (field_type == T_OBJECT || field_type == T_ARRAY) {
4189 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
4190 value_type = Reflection::unbox_for_regular_object(box, &value);
4191 Reflection::field_set(&value, &fd, receiver, field_type, CHECK);
4192 } else {
4193 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
4194 Reflection::field_set(&value, &fd, receiver, value_type, CHECK);
4195 }
4196 JVM_END
4199 JVM_ENTRY(void, JVM_SetPrimitiveField(JNIEnv *env, jobject field, jobject obj, jvalue v, unsigned char vCode))
4200 JVMWrapper("JVM_SetPrimitiveField");
4201 Handle field_mirror(thread, JNIHandles::resolve(field));
4202 Handle receiver (thread, JNIHandles::resolve(obj));
4203 fieldDescriptor fd;
4204 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK);
4205 BasicType value_type = (BasicType) vCode;
4206 Reflection::field_set(&v, &fd, receiver, value_type, CHECK);
4207 JVM_END
4210 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4212 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4213 JVMWrapper("JVM_InvokeMethod");
4214 Handle method_handle;
4215 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4216 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4217 Handle receiver(THREAD, JNIHandles::resolve(obj));
4218 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4219 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4220 jobject res = JNIHandles::make_local(env, result);
4221 if (JvmtiExport::should_post_vm_object_alloc()) {
4222 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4223 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4224 if (java_lang_Class::is_primitive(ret_type)) {
4225 // Only for primitive type vm allocates memory for java object.
4226 // See box() method.
4227 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4228 }
4229 }
4230 return res;
4231 } else {
4232 THROW_0(vmSymbols::java_lang_StackOverflowError());
4233 }
4234 JVM_END
4237 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4238 JVMWrapper("JVM_NewInstanceFromConstructor");
4239 oop constructor_mirror = JNIHandles::resolve(c);
4240 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4241 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4242 jobject res = JNIHandles::make_local(env, result);
4243 if (JvmtiExport::should_post_vm_object_alloc()) {
4244 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4245 }
4246 return res;
4247 JVM_END
4249 #endif /* SUPPORT_OLD_REFLECTION */
4251 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4253 JVM_LEAF(jboolean, JVM_SupportsCX8())
4254 JVMWrapper("JVM_SupportsCX8");
4255 return VM_Version::supports_cx8();
4256 JVM_END
4259 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4260 JVMWrapper("JVM_CX8Field");
4261 jlong res;
4262 oop o = JNIHandles::resolve(obj);
4263 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4264 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4266 assert(VM_Version::supports_cx8(), "cx8 not supported");
4267 res = Atomic::cmpxchg(newVal, addr, oldVal);
4269 return res == oldVal;
4270 JVM_END
4272 // DTrace ///////////////////////////////////////////////////////////////////
4274 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4275 JVMWrapper("JVM_DTraceGetVersion");
4276 return (jint)JVM_TRACING_DTRACE_VERSION;
4277 JVM_END
4279 JVM_ENTRY(jlong,JVM_DTraceActivate(
4280 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4281 JVM_DTraceProvider* providers))
4282 JVMWrapper("JVM_DTraceActivate");
4283 return DTraceJSDT::activate(
4284 version, module_name, providers_count, providers, CHECK_0);
4285 JVM_END
4287 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4288 JVMWrapper("JVM_DTraceIsProbeEnabled");
4289 return DTraceJSDT::is_probe_enabled(method);
4290 JVM_END
4292 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4293 JVMWrapper("JVM_DTraceDispose");
4294 DTraceJSDT::dispose(handle);
4295 JVM_END
4297 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4298 JVMWrapper("JVM_DTraceIsSupported");
4299 return DTraceJSDT::is_supported();
4300 JVM_END
4302 // Returns an array of all live Thread objects (VM internal JavaThreads,
4303 // jvmti agent threads, and JNI attaching threads are skipped)
4304 // See CR 6404306 regarding JNI attaching threads
4305 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4306 ResourceMark rm(THREAD);
4307 ThreadsListEnumerator tle(THREAD, false, false);
4308 JvmtiVMObjectAllocEventCollector oam;
4310 int num_threads = tle.num_threads();
4311 objArrayOop r = oopFactory::new_objArray(SystemDictionary::thread_klass(), num_threads, CHECK_NULL);
4312 objArrayHandle threads_ah(THREAD, r);
4314 for (int i = 0; i < num_threads; i++) {
4315 Handle h = tle.get_threadObj(i);
4316 threads_ah->obj_at_put(i, h());
4317 }
4319 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4320 JVM_END
4323 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4324 // Return StackTraceElement[][], each element is the stack trace of a thread in
4325 // the corresponding entry in the given threads array
4326 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4327 JVMWrapper("JVM_DumpThreads");
4328 JvmtiVMObjectAllocEventCollector oam;
4330 // Check if threads is null
4331 if (threads == NULL) {
4332 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4333 }
4335 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4336 objArrayHandle ah(THREAD, a);
4337 int num_threads = ah->length();
4338 // check if threads is non-empty array
4339 if (num_threads == 0) {
4340 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4341 }
4343 // check if threads is not an array of objects of Thread class
4344 klassOop k = objArrayKlass::cast(ah->klass())->element_klass();
4345 if (k != SystemDictionary::thread_klass()) {
4346 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4347 }
4349 ResourceMark rm(THREAD);
4351 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4352 for (int i = 0; i < num_threads; i++) {
4353 oop thread_obj = ah->obj_at(i);
4354 instanceHandle h(THREAD, (instanceOop) thread_obj);
4355 thread_handle_array->append(h);
4356 }
4358 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4359 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4361 JVM_END
4363 // JVM monitoring and management support
4364 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4365 return Management::get_jmm_interface(version);
4366 JVM_END
4368 // com.sun.tools.attach.VirtualMachine agent properties support
4369 //
4370 // Initialize the agent properties with the properties maintained in the VM
4371 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4372 JVMWrapper("JVM_InitAgentProperties");
4373 ResourceMark rm;
4375 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4377 PUTPROP(props, "sun.java.command", Arguments::java_command());
4378 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4379 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4380 return properties;
4381 JVM_END
4383 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4384 {
4385 JVMWrapper("JVM_GetEnclosingMethodInfo");
4386 JvmtiVMObjectAllocEventCollector oam;
4388 if (ofClass == NULL) {
4389 return NULL;
4390 }
4391 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4392 // Special handling for primitive objects
4393 if (java_lang_Class::is_primitive(mirror())) {
4394 return NULL;
4395 }
4396 klassOop k = java_lang_Class::as_klassOop(mirror());
4397 if (!Klass::cast(k)->oop_is_instance()) {
4398 return NULL;
4399 }
4400 instanceKlassHandle ik_h(THREAD, k);
4401 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4402 if (encl_method_class_idx == 0) {
4403 return NULL;
4404 }
4405 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::object_klass(), 3, CHECK_NULL);
4406 objArrayHandle dest(THREAD, dest_o);
4407 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4408 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror());
4409 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4410 if (encl_method_method_idx != 0) {
4411 symbolOop sym_o = ik_h->constants()->symbol_at(
4412 extract_low_short_from_int(
4413 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4414 symbolHandle sym(THREAD, sym_o);
4415 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4416 dest->obj_at_put(1, str());
4417 sym_o = ik_h->constants()->symbol_at(
4418 extract_high_short_from_int(
4419 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4420 sym = symbolHandle(THREAD, sym_o);
4421 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4422 dest->obj_at_put(2, str());
4423 }
4424 return (jobjectArray) JNIHandles::make_local(dest());
4425 }
4426 JVM_END
4428 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4429 jint javaThreadState))
4430 {
4431 // If new thread states are added in future JDK and VM versions,
4432 // this should check if the JDK version is compatible with thread
4433 // states supported by the VM. Return NULL if not compatible.
4434 //
4435 // This function must map the VM java_lang_Thread::ThreadStatus
4436 // to the Java thread state that the JDK supports.
4437 //
4439 typeArrayHandle values_h;
4440 switch (javaThreadState) {
4441 case JAVA_THREAD_STATE_NEW : {
4442 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4443 values_h = typeArrayHandle(THREAD, r);
4444 values_h->int_at_put(0, java_lang_Thread::NEW);
4445 break;
4446 }
4447 case JAVA_THREAD_STATE_RUNNABLE : {
4448 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4449 values_h = typeArrayHandle(THREAD, r);
4450 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4451 break;
4452 }
4453 case JAVA_THREAD_STATE_BLOCKED : {
4454 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4455 values_h = typeArrayHandle(THREAD, r);
4456 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4457 break;
4458 }
4459 case JAVA_THREAD_STATE_WAITING : {
4460 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4461 values_h = typeArrayHandle(THREAD, r);
4462 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4463 values_h->int_at_put(1, java_lang_Thread::PARKED);
4464 break;
4465 }
4466 case JAVA_THREAD_STATE_TIMED_WAITING : {
4467 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4468 values_h = typeArrayHandle(THREAD, r);
4469 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4470 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4471 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4472 break;
4473 }
4474 case JAVA_THREAD_STATE_TERMINATED : {
4475 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4476 values_h = typeArrayHandle(THREAD, r);
4477 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4478 break;
4479 }
4480 default:
4481 // Unknown state - probably incompatible JDK version
4482 return NULL;
4483 }
4485 return (jintArray) JNIHandles::make_local(env, values_h());
4486 }
4487 JVM_END
4490 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4491 jint javaThreadState,
4492 jintArray values))
4493 {
4494 // If new thread states are added in future JDK and VM versions,
4495 // this should check if the JDK version is compatible with thread
4496 // states supported by the VM. Return NULL if not compatible.
4497 //
4498 // This function must map the VM java_lang_Thread::ThreadStatus
4499 // to the Java thread state that the JDK supports.
4500 //
4502 ResourceMark rm;
4504 // Check if threads is null
4505 if (values == NULL) {
4506 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4507 }
4509 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4510 typeArrayHandle values_h(THREAD, v);
4512 objArrayHandle names_h;
4513 switch (javaThreadState) {
4514 case JAVA_THREAD_STATE_NEW : {
4515 assert(values_h->length() == 1 &&
4516 values_h->int_at(0) == java_lang_Thread::NEW,
4517 "Invalid threadStatus value");
4519 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4520 1, /* only 1 substate */
4521 CHECK_NULL);
4522 names_h = objArrayHandle(THREAD, r);
4523 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4524 names_h->obj_at_put(0, name());
4525 break;
4526 }
4527 case JAVA_THREAD_STATE_RUNNABLE : {
4528 assert(values_h->length() == 1 &&
4529 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4530 "Invalid threadStatus value");
4532 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4533 1, /* only 1 substate */
4534 CHECK_NULL);
4535 names_h = objArrayHandle(THREAD, r);
4536 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4537 names_h->obj_at_put(0, name());
4538 break;
4539 }
4540 case JAVA_THREAD_STATE_BLOCKED : {
4541 assert(values_h->length() == 1 &&
4542 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4543 "Invalid threadStatus value");
4545 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4546 1, /* only 1 substate */
4547 CHECK_NULL);
4548 names_h = objArrayHandle(THREAD, r);
4549 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4550 names_h->obj_at_put(0, name());
4551 break;
4552 }
4553 case JAVA_THREAD_STATE_WAITING : {
4554 assert(values_h->length() == 2 &&
4555 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4556 values_h->int_at(1) == java_lang_Thread::PARKED,
4557 "Invalid threadStatus value");
4558 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4559 2, /* number of substates */
4560 CHECK_NULL);
4561 names_h = objArrayHandle(THREAD, r);
4562 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4563 CHECK_NULL);
4564 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4565 CHECK_NULL);
4566 names_h->obj_at_put(0, name0());
4567 names_h->obj_at_put(1, name1());
4568 break;
4569 }
4570 case JAVA_THREAD_STATE_TIMED_WAITING : {
4571 assert(values_h->length() == 3 &&
4572 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4573 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4574 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4575 "Invalid threadStatus value");
4576 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4577 3, /* number of substates */
4578 CHECK_NULL);
4579 names_h = objArrayHandle(THREAD, r);
4580 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4581 CHECK_NULL);
4582 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4583 CHECK_NULL);
4584 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4585 CHECK_NULL);
4586 names_h->obj_at_put(0, name0());
4587 names_h->obj_at_put(1, name1());
4588 names_h->obj_at_put(2, name2());
4589 break;
4590 }
4591 case JAVA_THREAD_STATE_TERMINATED : {
4592 assert(values_h->length() == 1 &&
4593 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4594 "Invalid threadStatus value");
4595 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4596 1, /* only 1 substate */
4597 CHECK_NULL);
4598 names_h = objArrayHandle(THREAD, r);
4599 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4600 names_h->obj_at_put(0, name());
4601 break;
4602 }
4603 default:
4604 // Unknown state - probably incompatible JDK version
4605 return NULL;
4606 }
4607 return (jobjectArray) JNIHandles::make_local(env, names_h());
4608 }
4609 JVM_END
4611 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4612 {
4613 memset(info, 0, sizeof(info_size));
4615 info->jvm_version = Abstract_VM_Version::jvm_version();
4616 info->update_version = 0; /* 0 in HotSpot Express VM */
4617 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4619 // when we add a new capability in the jvm_version_info struct, we should also
4620 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4621 // counter defined in runtimeService.cpp.
4622 info->is_attachable = AttachListener::is_attach_supported();
4623 #ifdef KERNEL
4624 info->is_kernel_jvm = 1; // true;
4625 #else // KERNEL
4626 info->is_kernel_jvm = 0; // false;
4627 #endif // KERNEL
4628 }
4629 JVM_END