Tue, 17 Jun 2008 13:08:15 -0700
6714758: hotspot: provide an entry point to the BootStrap Class loader[dholmes,acorn]
Summary: adds JVM_FindClassFromBootLoader entry point, for jdk's use
Reviewed-by: dholmes, acorn
1 /*
2 * Copyright 1997-2007 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 klassOop caller = NULL;
68 JavaThread* jthread = JavaThread::current();
69 if (jthread->has_last_Java_frame()) {
70 vframeStream vfst(jthread);
72 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
73 symbolHandle access_controller = oopFactory::new_symbol_handle("java/security/AccessController", CHECK);
74 klassOop access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
75 symbolHandle privileged_action = oopFactory::new_symbol_handle("java/security/PrivilegedAction", CHECK);
76 klassOop privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
78 methodOop last_caller = NULL;
80 while (!vfst.at_end()) {
81 methodOop m = vfst.method();
82 if (!vfst.method()->method_holder()->klass_part()->is_subclass_of(SystemDictionary::classloader_klass())&&
83 !vfst.method()->method_holder()->klass_part()->is_subclass_of(access_controller_klass) &&
84 !vfst.method()->method_holder()->klass_part()->is_subclass_of(privileged_action_klass)) {
85 break;
86 }
87 last_caller = m;
88 vfst.next();
89 }
90 // if this is called from Class.forName0 and that is called from Class.forName,
91 // then print the caller of Class.forName. If this is Class.loadClass, then print
92 // that caller, otherwise keep quiet since this should be picked up elsewhere.
93 bool found_it = false;
94 if (!vfst.at_end() &&
95 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() &&
96 vfst.method()->name() == vmSymbols::forName0_name()) {
97 vfst.next();
98 if (!vfst.at_end() &&
99 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() &&
100 vfst.method()->name() == vmSymbols::forName_name()) {
101 vfst.next();
102 found_it = true;
103 }
104 } else if (last_caller != NULL &&
105 instanceKlass::cast(last_caller->method_holder())->name() ==
106 vmSymbols::java_lang_ClassLoader() &&
107 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
108 last_caller->name() == vmSymbols::loadClass_name())) {
109 found_it = true;
110 }
111 if (found_it && !vfst.at_end()) {
112 // found the caller
113 caller = vfst.method()->method_holder();
114 line_number = vfst.method()->line_number_from_bci(vfst.bci());
115 symbolOop s = instanceKlass::cast(vfst.method()->method_holder())->source_file_name();
116 if (s != NULL) {
117 source_file = s->as_C_string();
118 }
119 }
120 }
121 if (caller != NULL) {
122 if (to_class != caller) {
123 const char * from = Klass::cast(caller)->external_name();
124 const char * to = Klass::cast(to_class)->external_name();
125 // print in a single call to reduce interleaving between threads
126 if (source_file != NULL) {
127 tty->print("RESOLVE %s %s %s:%d (explicit)\n", from, to, source_file, line_number);
128 } else {
129 tty->print("RESOLVE %s %s (explicit)\n", from, to);
130 }
131 }
132 }
133 }
135 static void trace_class_resolution(klassOop to_class) {
136 EXCEPTION_MARK;
137 trace_class_resolution_impl(to_class, THREAD);
138 if (HAS_PENDING_EXCEPTION) {
139 CLEAR_PENDING_EXCEPTION;
140 }
141 }
143 // Wrapper to trace JVM functions
145 #ifdef ASSERT
146 class JVMTraceWrapper : public StackObj {
147 public:
148 JVMTraceWrapper(const char* format, ...) {
149 if (TraceJVMCalls) {
150 va_list ap;
151 va_start(ap, format);
152 tty->print("JVM ");
153 tty->vprint_cr(format, ap);
154 va_end(ap);
155 }
156 }
157 };
159 Histogram* JVMHistogram;
160 volatile jint JVMHistogram_lock = 0;
162 class JVMHistogramElement : public HistogramElement {
163 public:
164 JVMHistogramElement(const char* name);
165 };
167 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
168 _name = elementName;
169 uintx count = 0;
171 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
172 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
173 count +=1;
174 if ( (WarnOnStalledSpinLock > 0)
175 && (count % WarnOnStalledSpinLock == 0)) {
176 warning("JVMHistogram_lock seems to be stalled");
177 }
178 }
179 }
181 if(JVMHistogram == NULL)
182 JVMHistogram = new Histogram("JVM Call Counts",100);
184 JVMHistogram->add_element(this);
185 Atomic::dec(&JVMHistogram_lock);
186 }
188 #define JVMCountWrapper(arg) \
189 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
190 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
192 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
193 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
194 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
195 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
196 #else
197 #define JVMWrapper(arg1)
198 #define JVMWrapper2(arg1, arg2)
199 #define JVMWrapper3(arg1, arg2, arg3)
200 #define JVMWrapper4(arg1, arg2, arg3, arg4)
201 #endif
204 // Interface version /////////////////////////////////////////////////////////////////////
207 JVM_LEAF(jint, JVM_GetInterfaceVersion())
208 return JVM_INTERFACE_VERSION;
209 JVM_END
212 // java.lang.System //////////////////////////////////////////////////////////////////////
215 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
216 JVMWrapper("JVM_CurrentTimeMillis");
217 return os::javaTimeMillis();
218 JVM_END
220 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
221 JVMWrapper("JVM_NanoTime");
222 return os::javaTimeNanos();
223 JVM_END
226 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
227 jobject dst, jint dst_pos, jint length))
228 JVMWrapper("JVM_ArrayCopy");
229 // Check if we have null pointers
230 if (src == NULL || dst == NULL) {
231 THROW(vmSymbols::java_lang_NullPointerException());
232 }
233 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
234 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
235 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
236 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
237 // Do copy
238 Klass::cast(s->klass())->copy_array(s, src_pos, d, dst_pos, length, thread);
239 JVM_END
242 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
243 JavaValue r(T_OBJECT);
244 // public synchronized Object put(Object key, Object value);
245 HandleMark hm(THREAD);
246 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
247 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
248 JavaCalls::call_virtual(&r,
249 props,
250 KlassHandle(THREAD, SystemDictionary::properties_klass()),
251 vmSymbolHandles::put_name(),
252 vmSymbolHandles::object_object_object_signature(),
253 key_str,
254 value_str,
255 THREAD);
256 }
259 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
262 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
263 JVMWrapper("JVM_InitProperties");
264 ResourceMark rm;
266 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
268 // System property list includes both user set via -D option and
269 // jvm system specific properties.
270 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
271 PUTPROP(props, p->key(), p->value());
272 }
274 // Convert the -XX:MaxDirectMemorySize= command line flag
275 // to the sun.nio.MaxDirectMemorySize property.
276 // Do this after setting user properties to prevent people
277 // from setting the value with a -D option, as requested.
278 {
279 char as_chars[256];
280 jio_snprintf(as_chars, sizeof(as_chars), INTX_FORMAT, MaxDirectMemorySize);
281 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
282 }
284 // JVM monitoring and management support
285 // Add the sun.management.compiler property for the compiler's name
286 {
287 #undef CSIZE
288 #if defined(_LP64) || defined(_WIN64)
289 #define CSIZE "64-Bit "
290 #else
291 #define CSIZE
292 #endif // 64bit
294 #ifdef TIERED
295 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
296 #else
297 #if defined(COMPILER1)
298 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
299 #elif defined(COMPILER2)
300 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
301 #else
302 const char* compiler_name = "";
303 #endif // compilers
304 #endif // TIERED
306 if (*compiler_name != '\0' &&
307 (Arguments::mode() != Arguments::_int)) {
308 PUTPROP(props, "sun.management.compiler", compiler_name);
309 }
310 }
312 return properties;
313 JVM_END
316 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
318 extern volatile jint vm_created;
320 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
321 if (vm_created != 0 && (code == 0)) {
322 // The VM is about to exit. We call back into Java to check whether finalizers should be run
323 Universe::run_finalizers_on_exit();
324 }
325 before_exit(thread);
326 vm_exit(code);
327 JVM_END
330 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
331 before_exit(thread);
332 vm_exit(code);
333 JVM_END
336 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
337 register_on_exit_function(func);
338 JVM_END
341 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
342 JVMWrapper("JVM_GC");
343 if (!DisableExplicitGC) {
344 Universe::heap()->collect(GCCause::_java_lang_system_gc);
345 }
346 JVM_END
349 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
350 JVMWrapper("JVM_MaxObjectInspectionAge");
351 return Universe::heap()->millis_since_last_gc();
352 JVM_END
355 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
356 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
357 JVM_END
360 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
361 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
362 JVM_END
364 static inline jlong convert_size_t_to_jlong(size_t val) {
365 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
366 NOT_LP64 (return (jlong)val;)
367 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
368 }
370 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
371 JVMWrapper("JVM_TotalMemory");
372 size_t n = Universe::heap()->capacity();
373 return convert_size_t_to_jlong(n);
374 JVM_END
377 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
378 JVMWrapper("JVM_FreeMemory");
379 CollectedHeap* ch = Universe::heap();
380 size_t n = ch->capacity() - ch->used();
381 return convert_size_t_to_jlong(n);
382 JVM_END
385 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
386 JVMWrapper("JVM_MaxMemory");
387 size_t n = Universe::heap()->max_capacity();
388 return convert_size_t_to_jlong(n);
389 JVM_END
392 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
393 JVMWrapper("JVM_ActiveProcessorCount");
394 return os::active_processor_count();
395 JVM_END
399 // java.lang.Throwable //////////////////////////////////////////////////////
402 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
403 JVMWrapper("JVM_FillInStackTrace");
404 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
405 java_lang_Throwable::fill_in_stack_trace(exception);
406 JVM_END
409 JVM_ENTRY(void, JVM_PrintStackTrace(JNIEnv *env, jobject receiver, jobject printable))
410 JVMWrapper("JVM_PrintStackTrace");
411 // Note: This is no longer used in Merlin, but we still support it for compatibility.
412 oop exception = JNIHandles::resolve_non_null(receiver);
413 oop stream = JNIHandles::resolve_non_null(printable);
414 java_lang_Throwable::print_stack_trace(exception, stream);
415 JVM_END
418 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
419 JVMWrapper("JVM_GetStackTraceDepth");
420 oop exception = JNIHandles::resolve(throwable);
421 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
422 JVM_END
425 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
426 JVMWrapper("JVM_GetStackTraceElement");
427 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
428 oop exception = JNIHandles::resolve(throwable);
429 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
430 return JNIHandles::make_local(env, element);
431 JVM_END
434 // java.lang.Object ///////////////////////////////////////////////
437 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
438 JVMWrapper("JVM_IHashCode");
439 // as implemented in the classic virtual machine; return 0 if object is NULL
440 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
441 JVM_END
444 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
445 JVMWrapper("JVM_MonitorWait");
446 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
447 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorWait must apply to an object");
448 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
449 if (JvmtiExport::should_post_monitor_wait()) {
450 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
451 }
452 ObjectSynchronizer::wait(obj, ms, CHECK);
453 JVM_END
456 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
457 JVMWrapper("JVM_MonitorNotify");
458 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
459 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotify must apply to an object");
460 ObjectSynchronizer::notify(obj, CHECK);
461 JVM_END
464 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
465 JVMWrapper("JVM_MonitorNotifyAll");
466 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
467 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotifyAll must apply to an object");
468 ObjectSynchronizer::notifyall(obj, CHECK);
469 JVM_END
472 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
473 JVMWrapper("JVM_Clone");
474 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
475 const KlassHandle klass (THREAD, obj->klass());
476 JvmtiVMObjectAllocEventCollector oam;
478 #ifdef ASSERT
479 // Just checking that the cloneable flag is set correct
480 if (obj->is_javaArray()) {
481 guarantee(klass->is_cloneable(), "all arrays are cloneable");
482 } else {
483 guarantee(obj->is_instance(), "should be instanceOop");
484 bool cloneable = klass->is_subtype_of(SystemDictionary::cloneable_klass());
485 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
486 }
487 #endif
489 // Check if class of obj supports the Cloneable interface.
490 // All arrays are considered to be cloneable (See JLS 20.1.5)
491 if (!klass->is_cloneable()) {
492 ResourceMark rm(THREAD);
493 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
494 }
496 // Make shallow object copy
497 const int size = obj->size();
498 oop new_obj = NULL;
499 if (obj->is_javaArray()) {
500 const int length = ((arrayOop)obj())->length();
501 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
502 } else {
503 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
504 }
505 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
506 // is modifying a reference field in the clonee, a non-oop-atomic copy might
507 // be suspended in the middle of copying the pointer and end up with parts
508 // of two different pointers in the field. Subsequent dereferences will crash.
509 // 4846409: an oop-copy of objects with long or double fields or arrays of same
510 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
511 // of oops. We know objects are aligned on a minimum of an jlong boundary.
512 // The same is true of StubRoutines::object_copy and the various oop_copy
513 // variants, and of the code generated by the inline_native_clone intrinsic.
514 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
515 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
516 (size_t)align_object_size(size) / HeapWordsPerLong);
517 // Clear the header
518 new_obj->init_mark();
520 // Store check (mark entire object and let gc sort it out)
521 BarrierSet* bs = Universe::heap()->barrier_set();
522 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
523 bs->write_region(MemRegion((HeapWord*)new_obj, size));
525 // Caution: this involves a java upcall, so the clone should be
526 // "gc-robust" by this stage.
527 if (klass->has_finalizer()) {
528 assert(obj->is_instance(), "should be instanceOop");
529 new_obj = instanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
530 }
532 return JNIHandles::make_local(env, oop(new_obj));
533 JVM_END
535 // java.lang.Compiler ////////////////////////////////////////////////////
537 // The initial cuts of the HotSpot VM will not support JITs, and all existing
538 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
539 // functions are all silently ignored unless JVM warnings are printed.
541 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
542 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
543 JVM_END
546 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
547 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
548 return JNI_FALSE;
549 JVM_END
552 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
553 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
554 return JNI_FALSE;
555 JVM_END
558 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
559 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
560 return JNI_FALSE;
561 JVM_END
564 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
565 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
566 return NULL;
567 JVM_END
570 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
571 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
572 JVM_END
575 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
576 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
577 JVM_END
581 // Error message support //////////////////////////////////////////////////////
583 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
584 JVMWrapper("JVM_GetLastErrorString");
585 return hpi::lasterror(buf, len);
586 JVM_END
589 // java.io.File ///////////////////////////////////////////////////////////////
591 JVM_LEAF(char*, JVM_NativePath(char* path))
592 JVMWrapper2("JVM_NativePath (%s)", path);
593 return hpi::native_path(path);
594 JVM_END
597 // Misc. class handling ///////////////////////////////////////////////////////////
600 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
601 JVMWrapper("JVM_GetCallerClass");
602 klassOop k = thread->security_get_caller_class(depth);
603 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
604 JVM_END
607 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
608 JVMWrapper("JVM_FindPrimitiveClass");
609 oop mirror = NULL;
610 BasicType t = name2type(utf);
611 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
612 mirror = Universe::java_mirror(t);
613 }
614 if (mirror == NULL) {
615 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
616 } else {
617 return (jclass) JNIHandles::make_local(env, mirror);
618 }
619 JVM_END
622 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
623 JVMWrapper("JVM_ResolveClass");
624 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
625 JVM_END
627 // Rationale behind JVM_FindClassFromBootLoader
628 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
629 // b> because of (a) java.dll has a direct dependecy on the unexported
630 // private symbol "_JVM_FindClassFromClassLoader@20".
631 // c> the launcher cannot use the private symbol as it dynamically opens
632 // the entry point, so if something changes, the launcher will fail
633 // unexpectedly at runtime, it is safest for the launcher to dlopen a
634 // stable exported interface.
635 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
636 // signature to change from _JVM_FindClassFromClassLoader@20 to
637 // JVM_FindClassFromClassLoader and will not be backward compatible
638 // with older JDKs.
639 // Thus a public/stable exported entry point is the right solution,
640 // public here means public in linker semantics, and is exported only
641 // to the JDK, and is not intended to be a public API.
643 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
644 const char* name,
645 jboolean throwError))
646 JVMWrapper3("JVM_FindClassFromBootLoader %s throw %s", name,
647 throwError ? "error" : "exception");
648 return JVM_FindClassFromClassLoader(env, name, JNI_FALSE,
649 (jobject)NULL, throwError);
650 JVM_END
652 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
653 jboolean init, jobject loader,
654 jboolean throwError))
655 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
656 throwError ? "error" : "exception");
657 // Java libraries should ensure that name is never null...
658 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) {
659 // It's impossible to create this class; the name cannot fit
660 // into the constant pool.
661 if (throwError) {
662 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
663 } else {
664 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
665 }
666 }
667 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL);
668 Handle h_loader(THREAD, JNIHandles::resolve(loader));
669 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
670 Handle(), throwError, thread);
672 if (TraceClassResolution && result != NULL) {
673 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));
674 }
676 return result;
677 JVM_END
680 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
681 jboolean init, jclass from))
682 JVMWrapper2("JVM_FindClassFromClass %s", name);
683 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) {
684 // It's impossible to create this class; the name cannot fit
685 // into the constant pool.
686 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
687 }
688 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL);
689 oop from_class_oop = JNIHandles::resolve(from);
690 klassOop from_class = (from_class_oop == NULL)
691 ? (klassOop)NULL
692 : java_lang_Class::as_klassOop(from_class_oop);
693 oop class_loader = NULL;
694 oop protection_domain = NULL;
695 if (from_class != NULL) {
696 class_loader = Klass::cast(from_class)->class_loader();
697 protection_domain = Klass::cast(from_class)->protection_domain();
698 }
699 Handle h_loader(THREAD, class_loader);
700 Handle h_prot (THREAD, protection_domain);
701 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
702 h_prot, true, thread);
704 if (TraceClassResolution && result != NULL) {
705 // this function is generally only used for class loading during verification.
706 ResourceMark rm;
707 oop from_mirror = JNIHandles::resolve_non_null(from);
708 klassOop from_class = java_lang_Class::as_klassOop(from_mirror);
709 const char * from_name = Klass::cast(from_class)->external_name();
711 oop mirror = JNIHandles::resolve_non_null(result);
712 klassOop to_class = java_lang_Class::as_klassOop(mirror);
713 const char * to = Klass::cast(to_class)->external_name();
714 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
715 }
717 return result;
718 JVM_END
720 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
721 if (loader.is_null()) {
722 return;
723 }
725 // check whether the current caller thread holds the lock or not.
726 // If not, increment the corresponding counter
727 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
728 ObjectSynchronizer::owner_self) {
729 counter->inc();
730 }
731 }
733 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
734 static jclass jvm_define_class_common(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source, TRAPS) {
736 // Since exceptions can be thrown, class initialization can take place
737 // if name is NULL no check for class name in .class stream has to be made.
738 symbolHandle class_name;
739 if (name != NULL) {
740 const int str_len = (int)strlen(name);
741 if (str_len > symbolOopDesc::max_length()) {
742 // It's impossible to create this class; the name cannot fit
743 // into the constant pool.
744 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
745 }
746 class_name = oopFactory::new_symbol_handle(name, str_len, CHECK_NULL);
747 }
749 ResourceMark rm(THREAD);
750 ClassFileStream st((u1*) buf, len, (char *)source);
751 Handle class_loader (THREAD, JNIHandles::resolve(loader));
752 if (UsePerfData) {
753 is_lock_held_by_thread(class_loader,
754 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
755 THREAD);
756 }
757 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
758 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader,
759 protection_domain, &st,
760 CHECK_NULL);
762 if (TraceClassResolution && k != NULL) {
763 trace_class_resolution(k);
764 }
766 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
767 }
770 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
771 JVMWrapper2("JVM_DefineClass %s", name);
773 return jvm_define_class_common(env, name, loader, buf, len, pd, "__JVM_DefineClass__", THREAD);
774 JVM_END
777 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
778 JVMWrapper2("JVM_DefineClassWithSource %s", name);
780 return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD);
781 JVM_END
784 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
785 JVMWrapper("JVM_FindLoadedClass");
786 ResourceMark rm(THREAD);
788 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
789 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
791 const char* str = java_lang_String::as_utf8_string(string());
792 // Sanity check, don't expect null
793 if (str == NULL) return NULL;
795 const int str_len = (int)strlen(str);
796 if (str_len > symbolOopDesc::max_length()) {
797 // It's impossible to create this class; the name cannot fit
798 // into the constant pool.
799 return NULL;
800 }
801 symbolHandle klass_name = oopFactory::new_symbol_handle(str, str_len,CHECK_NULL);
803 // Security Note:
804 // The Java level wrapper will perform the necessary security check allowing
805 // us to pass the NULL as the initiating class loader.
806 Handle h_loader(THREAD, JNIHandles::resolve(loader));
807 if (UsePerfData) {
808 is_lock_held_by_thread(h_loader,
809 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
810 THREAD);
811 }
813 klassOop k = SystemDictionary::find_instance_or_array_klass(klass_name,
814 h_loader,
815 Handle(),
816 CHECK_NULL);
818 return (k == NULL) ? NULL :
819 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
820 JVM_END
823 // Reflection support //////////////////////////////////////////////////////////////////////////////
825 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
826 assert (cls != NULL, "illegal class");
827 JVMWrapper("JVM_GetClassName");
828 JvmtiVMObjectAllocEventCollector oam;
829 ResourceMark rm(THREAD);
830 const char* name;
831 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
832 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
833 } else {
834 // Consider caching interned string in Klass
835 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
836 assert(k->is_klass(), "just checking");
837 name = Klass::cast(k)->external_name();
838 }
839 oop result = StringTable::intern((char*) name, CHECK_NULL);
840 return (jstring) JNIHandles::make_local(env, result);
841 JVM_END
844 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
845 JVMWrapper("JVM_GetClassInterfaces");
846 JvmtiVMObjectAllocEventCollector oam;
847 oop mirror = JNIHandles::resolve_non_null(cls);
849 // Special handling for primitive objects
850 if (java_lang_Class::is_primitive(mirror)) {
851 // Primitive objects does not have any interfaces
852 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL);
853 return (jobjectArray) JNIHandles::make_local(env, r);
854 }
856 KlassHandle klass(thread, java_lang_Class::as_klassOop(mirror));
857 // Figure size of result array
858 int size;
859 if (klass->oop_is_instance()) {
860 size = instanceKlass::cast(klass())->local_interfaces()->length();
861 } else {
862 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
863 size = 2;
864 }
866 // Allocate result array
867 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), size, CHECK_NULL);
868 objArrayHandle result (THREAD, r);
869 // Fill in result
870 if (klass->oop_is_instance()) {
871 // Regular instance klass, fill in all local interfaces
872 for (int index = 0; index < size; index++) {
873 klassOop k = klassOop(instanceKlass::cast(klass())->local_interfaces()->obj_at(index));
874 result->obj_at_put(index, Klass::cast(k)->java_mirror());
875 }
876 } else {
877 // All arrays implement java.lang.Cloneable and java.io.Serializable
878 result->obj_at_put(0, Klass::cast(SystemDictionary::cloneable_klass())->java_mirror());
879 result->obj_at_put(1, Klass::cast(SystemDictionary::serializable_klass())->java_mirror());
880 }
881 return (jobjectArray) JNIHandles::make_local(env, result());
882 JVM_END
885 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
886 JVMWrapper("JVM_GetClassLoader");
887 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
888 return NULL;
889 }
890 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
891 oop loader = Klass::cast(k)->class_loader();
892 return JNIHandles::make_local(env, loader);
893 JVM_END
896 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
897 JVMWrapper("JVM_IsInterface");
898 oop mirror = JNIHandles::resolve_non_null(cls);
899 if (java_lang_Class::is_primitive(mirror)) {
900 return JNI_FALSE;
901 }
902 klassOop k = java_lang_Class::as_klassOop(mirror);
903 jboolean result = Klass::cast(k)->is_interface();
904 assert(!result || Klass::cast(k)->oop_is_instance(),
905 "all interfaces are instance types");
906 // The compiler intrinsic for isInterface tests the
907 // Klass::_access_flags bits in the same way.
908 return result;
909 JVM_END
912 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
913 JVMWrapper("JVM_GetClassSigners");
914 JvmtiVMObjectAllocEventCollector oam;
915 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
916 // There are no signers for primitive types
917 return NULL;
918 }
920 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
921 objArrayOop signers = NULL;
922 if (Klass::cast(k)->oop_is_instance()) {
923 signers = instanceKlass::cast(k)->signers();
924 }
926 // If there are no signers set in the class, or if the class
927 // is an array, return NULL.
928 if (signers == NULL) return NULL;
930 // copy of the signers array
931 klassOop element = objArrayKlass::cast(signers->klass())->element_klass();
932 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
933 for (int index = 0; index < signers->length(); index++) {
934 signers_copy->obj_at_put(index, signers->obj_at(index));
935 }
937 // return the copy
938 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
939 JVM_END
942 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
943 JVMWrapper("JVM_SetClassSigners");
944 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
945 // This call is ignored for primitive types and arrays.
946 // Signers are only set once, ClassLoader.java, and thus shouldn't
947 // be called with an array. Only the bootstrap loader creates arrays.
948 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
949 if (Klass::cast(k)->oop_is_instance()) {
950 instanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers)));
951 }
952 }
953 JVM_END
956 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
957 JVMWrapper("JVM_GetProtectionDomain");
958 if (JNIHandles::resolve(cls) == NULL) {
959 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
960 }
962 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
963 // Primitive types does not have a protection domain.
964 return NULL;
965 }
967 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
968 return (jobject) JNIHandles::make_local(env, Klass::cast(k)->protection_domain());
969 JVM_END
972 // Obsolete since 1.2 (Class.setProtectionDomain removed), although
973 // still defined in core libraries as of 1.5.
974 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain))
975 JVMWrapper("JVM_SetProtectionDomain");
976 if (JNIHandles::resolve(cls) == NULL) {
977 THROW(vmSymbols::java_lang_NullPointerException());
978 }
979 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
980 // Call is ignored for primitive types
981 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
983 // cls won't be an array, as this called only from ClassLoader.defineClass
984 if (Klass::cast(k)->oop_is_instance()) {
985 oop pd = JNIHandles::resolve(protection_domain);
986 assert(pd == NULL || pd->is_oop(), "just checking");
987 instanceKlass::cast(k)->set_protection_domain(pd);
988 }
989 }
990 JVM_END
993 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
994 JVMWrapper("JVM_DoPrivileged");
996 if (action == NULL) {
997 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
998 }
1000 // Stack allocated list of privileged stack elements
1001 PrivilegedElement pi;
1003 // Check that action object understands "Object run()"
1004 Handle object (THREAD, JNIHandles::resolve(action));
1006 // get run() method
1007 methodOop m_oop = Klass::cast(object->klass())->uncached_lookup_method(
1008 vmSymbols::run_method_name(),
1009 vmSymbols::void_object_signature());
1010 methodHandle m (THREAD, m_oop);
1011 if (m.is_null() || !m->is_method() || !methodOop(m())->is_public() || methodOop(m())->is_static()) {
1012 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1013 }
1015 // Compute the frame initiating the do privileged operation and setup the privileged stack
1016 vframeStream vfst(thread);
1017 vfst.security_get_caller_frame(1);
1019 if (!vfst.at_end()) {
1020 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL);
1021 thread->set_privileged_stack_top(&pi);
1022 }
1025 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1026 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1027 Handle pending_exception;
1028 JavaValue result(T_OBJECT);
1029 JavaCallArguments args(object);
1030 JavaCalls::call(&result, m, &args, THREAD);
1032 // done with action, remove ourselves from the list
1033 if (!vfst.at_end()) {
1034 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1035 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1036 }
1038 if (HAS_PENDING_EXCEPTION) {
1039 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1040 CLEAR_PENDING_EXCEPTION;
1042 if ( pending_exception->is_a(SystemDictionary::exception_klass()) &&
1043 !pending_exception->is_a(SystemDictionary::runtime_exception_klass())) {
1044 // Throw a java.security.PrivilegedActionException(Exception e) exception
1045 JavaCallArguments args(pending_exception);
1046 THROW_ARG_0(vmSymbolHandles::java_security_PrivilegedActionException(),
1047 vmSymbolHandles::exception_void_signature(),
1048 &args);
1049 }
1050 }
1052 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1053 return JNIHandles::make_local(env, (oop) result.get_jobject());
1054 JVM_END
1057 // Returns the inherited_access_control_context field of the running thread.
1058 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1059 JVMWrapper("JVM_GetInheritedAccessControlContext");
1060 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1061 return JNIHandles::make_local(env, result);
1062 JVM_END
1064 class RegisterArrayForGC {
1065 private:
1066 JavaThread *_thread;
1067 public:
1068 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1069 _thread = thread;
1070 _thread->register_array_for_gc(array);
1071 }
1073 ~RegisterArrayForGC() {
1074 _thread->register_array_for_gc(NULL);
1075 }
1076 };
1079 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1080 JVMWrapper("JVM_GetStackAccessControlContext");
1081 if (!UsePrivilegedStack) return NULL;
1083 ResourceMark rm(THREAD);
1084 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1085 JvmtiVMObjectAllocEventCollector oam;
1087 // count the protection domains on the execution stack. We collapse
1088 // duplicate consecutive protection domains into a single one, as
1089 // well as stopping when we hit a privileged frame.
1091 // Use vframeStream to iterate through Java frames
1092 vframeStream vfst(thread);
1094 oop previous_protection_domain = NULL;
1095 Handle privileged_context(thread, NULL);
1096 bool is_privileged = false;
1097 oop protection_domain = NULL;
1099 for(; !vfst.at_end(); vfst.next()) {
1100 // get method of frame
1101 methodOop method = vfst.method();
1102 intptr_t* frame_id = vfst.frame_id();
1104 // check the privileged frames to see if we have a match
1105 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1106 // this frame is privileged
1107 is_privileged = true;
1108 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1109 protection_domain = thread->privileged_stack_top()->protection_domain();
1110 } else {
1111 protection_domain = instanceKlass::cast(method->method_holder())->protection_domain();
1112 }
1114 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1115 local_array->push(protection_domain);
1116 previous_protection_domain = protection_domain;
1117 }
1119 if (is_privileged) break;
1120 }
1123 // either all the domains on the stack were system domains, or
1124 // we had a privileged system domain
1125 if (local_array->is_empty()) {
1126 if (is_privileged && privileged_context.is_null()) return NULL;
1128 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1129 return JNIHandles::make_local(env, result);
1130 }
1132 // the resource area must be registered in case of a gc
1133 RegisterArrayForGC ragc(thread, local_array);
1134 objArrayOop context = oopFactory::new_objArray(SystemDictionary::protectionDomain_klass(),
1135 local_array->length(), CHECK_NULL);
1136 objArrayHandle h_context(thread, context);
1137 for (int index = 0; index < local_array->length(); index++) {
1138 h_context->obj_at_put(index, local_array->at(index));
1139 }
1141 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1143 return JNIHandles::make_local(env, result);
1144 JVM_END
1147 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1148 JVMWrapper("JVM_IsArrayClass");
1149 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1150 return (k != NULL) && Klass::cast(k)->oop_is_javaArray() ? true : false;
1151 JVM_END
1154 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1155 JVMWrapper("JVM_IsPrimitiveClass");
1156 oop mirror = JNIHandles::resolve_non_null(cls);
1157 return (jboolean) java_lang_Class::is_primitive(mirror);
1158 JVM_END
1161 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1162 JVMWrapper("JVM_GetComponentType");
1163 oop mirror = JNIHandles::resolve_non_null(cls);
1164 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1165 return (jclass) JNIHandles::make_local(env, result);
1166 JVM_END
1169 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1170 JVMWrapper("JVM_GetClassModifiers");
1171 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1172 // Primitive type
1173 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1174 }
1176 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1177 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1178 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1179 return k->modifier_flags();
1180 JVM_END
1183 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1185 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1186 const int inner_class_info_index = 0;
1187 const int outer_class_info_index = 1;
1189 JvmtiVMObjectAllocEventCollector oam;
1190 // ofClass is a reference to a java_lang_Class object. The mirror object
1191 // of an instanceKlass
1193 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1194 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1195 oop result = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL);
1196 return (jobjectArray)JNIHandles::make_local(env, result);
1197 }
1199 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1201 if (k->inner_classes()->length() == 0) {
1202 // Neither an inner nor outer class
1203 oop result = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL);
1204 return (jobjectArray)JNIHandles::make_local(env, result);
1205 }
1207 // find inner class info
1208 typeArrayHandle icls(thread, k->inner_classes());
1209 constantPoolHandle cp(thread, k->constants());
1210 int length = icls->length();
1212 // Allocate temp. result array
1213 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), length/4, CHECK_NULL);
1214 objArrayHandle result (THREAD, r);
1215 int members = 0;
1217 for(int i = 0; i < length; i += 4) {
1218 int ioff = icls->ushort_at(i + inner_class_info_index);
1219 int ooff = icls->ushort_at(i + outer_class_info_index);
1221 if (ioff != 0 && ooff != 0) {
1222 // Check to see if the name matches the class we're looking for
1223 // before attempting to find the class.
1224 if (cp->klass_name_at_matches(k, ooff)) {
1225 klassOop outer_klass = cp->klass_at(ooff, CHECK_NULL);
1226 if (outer_klass == k()) {
1227 klassOop ik = cp->klass_at(ioff, CHECK_NULL);
1228 instanceKlassHandle inner_klass (THREAD, ik);
1230 // Throws an exception if outer klass has not declared k as
1231 // an inner klass
1232 Reflection::check_for_inner_class(k, inner_klass, CHECK_NULL);
1234 result->obj_at_put(members, inner_klass->java_mirror());
1235 members++;
1236 }
1237 }
1238 }
1239 }
1241 if (members != length) {
1242 // Return array of right length
1243 objArrayOop res = oopFactory::new_objArray(SystemDictionary::class_klass(), members, CHECK_NULL);
1244 for(int i = 0; i < members; i++) {
1245 res->obj_at_put(i, result->obj_at(i));
1246 }
1247 return (jobjectArray)JNIHandles::make_local(env, res);
1248 }
1250 return (jobjectArray)JNIHandles::make_local(env, result());
1251 JVM_END
1254 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1255 const int inner_class_info_index = 0;
1256 const int outer_class_info_index = 1;
1258 // ofClass is a reference to a java_lang_Class object.
1259 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1260 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1261 return NULL;
1262 }
1264 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1266 if (k->inner_classes()->length() == 0) {
1267 // No inner class info => no declaring class
1268 return NULL;
1269 }
1271 typeArrayHandle i_icls(thread, k->inner_classes());
1272 constantPoolHandle i_cp(thread, k->constants());
1273 int i_length = i_icls->length();
1275 bool found = false;
1276 klassOop ok;
1277 instanceKlassHandle outer_klass;
1279 // Find inner_klass attribute
1280 for(int i = 0; i < i_length && !found; i+= 4) {
1281 int ioff = i_icls->ushort_at(i + inner_class_info_index);
1282 int ooff = i_icls->ushort_at(i + outer_class_info_index);
1284 if (ioff != 0 && ooff != 0) {
1285 // Check to see if the name matches the class we're looking for
1286 // before attempting to find the class.
1287 if (i_cp->klass_name_at_matches(k, ioff)) {
1288 klassOop inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1289 if (k() == inner_klass) {
1290 found = true;
1291 ok = i_cp->klass_at(ooff, CHECK_NULL);
1292 outer_klass = instanceKlassHandle(thread, ok);
1293 }
1294 }
1295 }
1296 }
1298 // If no inner class attribute found for this class.
1299 if (!found) return NULL;
1301 // Throws an exception if outer klass has not declared k as an inner klass
1302 Reflection::check_for_inner_class(outer_klass, k, CHECK_NULL);
1304 return (jclass)JNIHandles::make_local(env, outer_klass->java_mirror());
1305 JVM_END
1308 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1309 assert (cls != NULL, "illegal class");
1310 JVMWrapper("JVM_GetClassSignature");
1311 JvmtiVMObjectAllocEventCollector oam;
1312 ResourceMark rm(THREAD);
1313 // Return null for arrays and primatives
1314 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1315 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1316 if (Klass::cast(k)->oop_is_instance()) {
1317 symbolHandle sym = symbolHandle(THREAD, instanceKlass::cast(k)->generic_signature());
1318 if (sym.is_null()) return NULL;
1319 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1320 return (jstring) JNIHandles::make_local(env, str());
1321 }
1322 }
1323 return NULL;
1324 JVM_END
1327 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1328 assert (cls != NULL, "illegal class");
1329 JVMWrapper("JVM_GetClassAnnotations");
1330 ResourceMark rm(THREAD);
1331 // Return null for arrays and primitives
1332 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1333 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1334 if (Klass::cast(k)->oop_is_instance()) {
1335 return (jbyteArray) JNIHandles::make_local(env,
1336 instanceKlass::cast(k)->class_annotations());
1337 }
1338 }
1339 return NULL;
1340 JVM_END
1343 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1344 assert(field != NULL, "illegal field");
1345 JVMWrapper("JVM_GetFieldAnnotations");
1347 // some of this code was adapted from from jni_FromReflectedField
1349 // field is a handle to a java.lang.reflect.Field object
1350 oop reflected = JNIHandles::resolve_non_null(field);
1351 oop mirror = java_lang_reflect_Field::clazz(reflected);
1352 klassOop k = java_lang_Class::as_klassOop(mirror);
1353 int slot = java_lang_reflect_Field::slot(reflected);
1354 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1356 fieldDescriptor fd;
1357 KlassHandle kh(THREAD, k);
1358 intptr_t offset = instanceKlass::cast(kh())->offset_from_fields(slot);
1360 if (modifiers & JVM_ACC_STATIC) {
1361 // for static fields we only look in the current class
1362 if (!instanceKlass::cast(kh())->find_local_field_from_offset(offset,
1363 true, &fd)) {
1364 assert(false, "cannot find static field");
1365 return NULL; // robustness
1366 }
1367 } else {
1368 // for instance fields we start with the current class and work
1369 // our way up through the superclass chain
1370 if (!instanceKlass::cast(kh())->find_field_from_offset(offset, false,
1371 &fd)) {
1372 assert(false, "cannot find instance field");
1373 return NULL; // robustness
1374 }
1375 }
1377 return (jbyteArray) JNIHandles::make_local(env, fd.annotations());
1378 JVM_END
1381 static methodOop jvm_get_method_common(jobject method, TRAPS) {
1382 // some of this code was adapted from from jni_FromReflectedMethod
1384 oop reflected = JNIHandles::resolve_non_null(method);
1385 oop mirror = NULL;
1386 int slot = 0;
1388 if (reflected->klass() == SystemDictionary::reflect_constructor_klass()) {
1389 mirror = java_lang_reflect_Constructor::clazz(reflected);
1390 slot = java_lang_reflect_Constructor::slot(reflected);
1391 } else {
1392 assert(reflected->klass() == SystemDictionary::reflect_method_klass(),
1393 "wrong type");
1394 mirror = java_lang_reflect_Method::clazz(reflected);
1395 slot = java_lang_reflect_Method::slot(reflected);
1396 }
1397 klassOop k = java_lang_Class::as_klassOop(mirror);
1399 KlassHandle kh(THREAD, k);
1400 methodOop m = instanceKlass::cast(kh())->method_with_idnum(slot);
1401 if (m == NULL) {
1402 assert(false, "cannot find method");
1403 return NULL; // robustness
1404 }
1406 return m;
1407 }
1410 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1411 JVMWrapper("JVM_GetMethodAnnotations");
1413 // method is a handle to a java.lang.reflect.Method object
1414 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1415 return (jbyteArray) JNIHandles::make_local(env, m->annotations());
1416 JVM_END
1419 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1420 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1422 // method is a handle to a java.lang.reflect.Method object
1423 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1424 return (jbyteArray) JNIHandles::make_local(env, m->annotation_default());
1425 JVM_END
1428 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1429 JVMWrapper("JVM_GetMethodParameterAnnotations");
1431 // method is a handle to a java.lang.reflect.Method object
1432 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1433 return (jbyteArray) JNIHandles::make_local(env, m->parameter_annotations());
1434 JVM_END
1437 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1439 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1440 {
1441 JVMWrapper("JVM_GetClassDeclaredFields");
1442 JvmtiVMObjectAllocEventCollector oam;
1444 // Exclude primitive types and array types
1445 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1446 Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1447 // Return empty array
1448 oop res = oopFactory::new_objArray(SystemDictionary::reflect_field_klass(), 0, CHECK_NULL);
1449 return (jobjectArray) JNIHandles::make_local(env, res);
1450 }
1452 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1453 constantPoolHandle cp(THREAD, k->constants());
1455 // Ensure class is linked
1456 k->link_class(CHECK_NULL);
1458 typeArrayHandle fields(THREAD, k->fields());
1459 int fields_len = fields->length();
1461 // 4496456 We need to filter out java.lang.Throwable.backtrace
1462 bool skip_backtrace = false;
1464 // Allocate result
1465 int num_fields;
1467 if (publicOnly) {
1468 num_fields = 0;
1469 for (int i = 0, j = 0; i < fields_len; i += instanceKlass::next_offset, j++) {
1470 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
1471 if (mods & JVM_ACC_PUBLIC) ++num_fields;
1472 }
1473 } else {
1474 num_fields = fields_len / instanceKlass::next_offset;
1476 if (k() == SystemDictionary::throwable_klass()) {
1477 num_fields--;
1478 skip_backtrace = true;
1479 }
1480 }
1482 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_field_klass(), num_fields, CHECK_NULL);
1483 objArrayHandle result (THREAD, r);
1485 int out_idx = 0;
1486 fieldDescriptor fd;
1487 for (int i = 0; i < fields_len; i += instanceKlass::next_offset) {
1488 if (skip_backtrace) {
1489 // 4496456 skip java.lang.Throwable.backtrace
1490 int offset = k->offset_from_fields(i);
1491 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1492 }
1494 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
1495 if (!publicOnly || (mods & JVM_ACC_PUBLIC)) {
1496 fd.initialize(k(), i);
1497 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1498 result->obj_at_put(out_idx, field);
1499 ++out_idx;
1500 }
1501 }
1502 assert(out_idx == num_fields, "just checking");
1503 return (jobjectArray) JNIHandles::make_local(env, result());
1504 }
1505 JVM_END
1507 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1508 {
1509 JVMWrapper("JVM_GetClassDeclaredMethods");
1510 JvmtiVMObjectAllocEventCollector oam;
1512 // Exclude primitive types and array types
1513 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1514 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1515 // Return empty array
1516 oop res = oopFactory::new_objArray(SystemDictionary::reflect_method_klass(), 0, CHECK_NULL);
1517 return (jobjectArray) JNIHandles::make_local(env, res);
1518 }
1520 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1522 // Ensure class is linked
1523 k->link_class(CHECK_NULL);
1525 objArrayHandle methods (THREAD, k->methods());
1526 int methods_length = methods->length();
1527 int num_methods = 0;
1529 int i;
1530 for (i = 0; i < methods_length; i++) {
1531 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1532 if (!method->is_initializer()) {
1533 if (!publicOnly || method->is_public()) {
1534 ++num_methods;
1535 }
1536 }
1537 }
1539 // Allocate result
1540 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_method_klass(), num_methods, CHECK_NULL);
1541 objArrayHandle result (THREAD, r);
1543 int out_idx = 0;
1544 for (i = 0; i < methods_length; i++) {
1545 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1546 if (!method->is_initializer()) {
1547 if (!publicOnly || method->is_public()) {
1548 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1549 result->obj_at_put(out_idx, m);
1550 ++out_idx;
1551 }
1552 }
1553 }
1554 assert(out_idx == num_methods, "just checking");
1555 return (jobjectArray) JNIHandles::make_local(env, result());
1556 }
1557 JVM_END
1559 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1560 {
1561 JVMWrapper("JVM_GetClassDeclaredConstructors");
1562 JvmtiVMObjectAllocEventCollector oam;
1564 // Exclude primitive types and array types
1565 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1566 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1567 // Return empty array
1568 oop res = oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), 0 , CHECK_NULL);
1569 return (jobjectArray) JNIHandles::make_local(env, res);
1570 }
1572 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1574 // Ensure class is linked
1575 k->link_class(CHECK_NULL);
1577 objArrayHandle methods (THREAD, k->methods());
1578 int methods_length = methods->length();
1579 int num_constructors = 0;
1581 int i;
1582 for (i = 0; i < methods_length; i++) {
1583 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1584 if (method->is_initializer() && !method->is_static()) {
1585 if (!publicOnly || method->is_public()) {
1586 ++num_constructors;
1587 }
1588 }
1589 }
1591 // Allocate result
1592 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), num_constructors, CHECK_NULL);
1593 objArrayHandle result(THREAD, r);
1595 int out_idx = 0;
1596 for (i = 0; i < methods_length; i++) {
1597 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1598 if (method->is_initializer() && !method->is_static()) {
1599 if (!publicOnly || method->is_public()) {
1600 oop m = Reflection::new_constructor(method, CHECK_NULL);
1601 result->obj_at_put(out_idx, m);
1602 ++out_idx;
1603 }
1604 }
1605 }
1606 assert(out_idx == num_constructors, "just checking");
1607 return (jobjectArray) JNIHandles::make_local(env, result());
1608 }
1609 JVM_END
1611 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1612 {
1613 JVMWrapper("JVM_GetClassAccessFlags");
1614 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1615 // Primitive type
1616 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1617 }
1619 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1620 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1621 }
1622 JVM_END
1625 // Constant pool access //////////////////////////////////////////////////////////
1627 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1628 {
1629 JVMWrapper("JVM_GetClassConstantPool");
1630 JvmtiVMObjectAllocEventCollector oam;
1632 // Return null for primitives and arrays
1633 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1634 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1635 if (Klass::cast(k)->oop_is_instance()) {
1636 instanceKlassHandle k_h(THREAD, k);
1637 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1638 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants());
1639 return JNIHandles::make_local(jcp());
1640 }
1641 }
1642 return NULL;
1643 }
1644 JVM_END
1647 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool))
1648 {
1649 JVMWrapper("JVM_ConstantPoolGetSize");
1650 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1651 return cp->length();
1652 }
1653 JVM_END
1656 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1657 if (!cp->is_within_bounds(index)) {
1658 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1659 }
1660 }
1663 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1664 {
1665 JVMWrapper("JVM_ConstantPoolGetClassAt");
1666 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1667 bounds_check(cp, index, CHECK_NULL);
1668 constantTag tag = cp->tag_at(index);
1669 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1670 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1671 }
1672 klassOop k = cp->klass_at(index, CHECK_NULL);
1673 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror());
1674 }
1675 JVM_END
1678 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1679 {
1680 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1681 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1682 bounds_check(cp, index, CHECK_NULL);
1683 constantTag tag = cp->tag_at(index);
1684 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1685 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1686 }
1687 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index);
1688 if (k == NULL) return NULL;
1689 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror());
1690 }
1691 JVM_END
1693 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1694 constantTag tag = cp->tag_at(index);
1695 if (!tag.is_method() && !tag.is_interface_method()) {
1696 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1697 }
1698 int klass_ref = cp->uncached_klass_ref_index_at(index);
1699 klassOop k_o;
1700 if (force_resolution) {
1701 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1702 } else {
1703 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1704 if (k_o == NULL) return NULL;
1705 }
1706 instanceKlassHandle k(THREAD, k_o);
1707 symbolOop name = cp->uncached_name_ref_at(index);
1708 symbolOop sig = cp->uncached_signature_ref_at(index);
1709 methodHandle m (THREAD, k->find_method(name, sig));
1710 if (m.is_null()) {
1711 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1712 }
1713 oop method;
1714 if (!m->is_initializer() || m->is_static()) {
1715 method = Reflection::new_method(m, true, true, CHECK_NULL);
1716 } else {
1717 method = Reflection::new_constructor(m, CHECK_NULL);
1718 }
1719 return JNIHandles::make_local(method);
1720 }
1722 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1723 {
1724 JVMWrapper("JVM_ConstantPoolGetMethodAt");
1725 JvmtiVMObjectAllocEventCollector oam;
1726 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1727 bounds_check(cp, index, CHECK_NULL);
1728 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1729 return res;
1730 }
1731 JVM_END
1733 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1734 {
1735 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1736 JvmtiVMObjectAllocEventCollector oam;
1737 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1738 bounds_check(cp, index, CHECK_NULL);
1739 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1740 return res;
1741 }
1742 JVM_END
1744 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1745 constantTag tag = cp->tag_at(index);
1746 if (!tag.is_field()) {
1747 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1748 }
1749 int klass_ref = cp->uncached_klass_ref_index_at(index);
1750 klassOop k_o;
1751 if (force_resolution) {
1752 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1753 } else {
1754 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1755 if (k_o == NULL) return NULL;
1756 }
1757 instanceKlassHandle k(THREAD, k_o);
1758 symbolOop name = cp->uncached_name_ref_at(index);
1759 symbolOop sig = cp->uncached_signature_ref_at(index);
1760 fieldDescriptor fd;
1761 klassOop target_klass = k->find_field(name, sig, &fd);
1762 if (target_klass == NULL) {
1763 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
1764 }
1765 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
1766 return JNIHandles::make_local(field);
1767 }
1769 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1770 {
1771 JVMWrapper("JVM_ConstantPoolGetFieldAt");
1772 JvmtiVMObjectAllocEventCollector oam;
1773 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1774 bounds_check(cp, index, CHECK_NULL);
1775 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
1776 return res;
1777 }
1778 JVM_END
1780 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1781 {
1782 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
1783 JvmtiVMObjectAllocEventCollector oam;
1784 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1785 bounds_check(cp, index, CHECK_NULL);
1786 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
1787 return res;
1788 }
1789 JVM_END
1791 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1792 {
1793 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
1794 JvmtiVMObjectAllocEventCollector oam;
1795 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1796 bounds_check(cp, index, CHECK_NULL);
1797 constantTag tag = cp->tag_at(index);
1798 if (!tag.is_field_or_method()) {
1799 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1800 }
1801 int klass_ref = cp->uncached_klass_ref_index_at(index);
1802 symbolHandle klass_name (THREAD, cp->klass_name_at(klass_ref));
1803 symbolHandle member_name(THREAD, cp->uncached_name_ref_at(index));
1804 symbolHandle member_sig (THREAD, cp->uncached_signature_ref_at(index));
1805 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::string_klass(), 3, CHECK_NULL);
1806 objArrayHandle dest(THREAD, dest_o);
1807 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
1808 dest->obj_at_put(0, str());
1809 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
1810 dest->obj_at_put(1, str());
1811 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
1812 dest->obj_at_put(2, str());
1813 return (jobjectArray) JNIHandles::make_local(dest());
1814 }
1815 JVM_END
1817 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1818 {
1819 JVMWrapper("JVM_ConstantPoolGetIntAt");
1820 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1821 bounds_check(cp, index, CHECK_0);
1822 constantTag tag = cp->tag_at(index);
1823 if (!tag.is_int()) {
1824 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1825 }
1826 return cp->int_at(index);
1827 }
1828 JVM_END
1830 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1831 {
1832 JVMWrapper("JVM_ConstantPoolGetLongAt");
1833 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1834 bounds_check(cp, index, CHECK_(0L));
1835 constantTag tag = cp->tag_at(index);
1836 if (!tag.is_long()) {
1837 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1838 }
1839 return cp->long_at(index);
1840 }
1841 JVM_END
1843 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1844 {
1845 JVMWrapper("JVM_ConstantPoolGetFloatAt");
1846 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1847 bounds_check(cp, index, CHECK_(0.0f));
1848 constantTag tag = cp->tag_at(index);
1849 if (!tag.is_float()) {
1850 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1851 }
1852 return cp->float_at(index);
1853 }
1854 JVM_END
1856 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1857 {
1858 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
1859 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1860 bounds_check(cp, index, CHECK_(0.0));
1861 constantTag tag = cp->tag_at(index);
1862 if (!tag.is_double()) {
1863 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1864 }
1865 return cp->double_at(index);
1866 }
1867 JVM_END
1869 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1870 {
1871 JVMWrapper("JVM_ConstantPoolGetStringAt");
1872 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1873 bounds_check(cp, index, CHECK_NULL);
1874 constantTag tag = cp->tag_at(index);
1875 if (!tag.is_string() && !tag.is_unresolved_string()) {
1876 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1877 }
1878 oop str = cp->string_at(index, CHECK_NULL);
1879 return (jstring) JNIHandles::make_local(str);
1880 }
1881 JVM_END
1883 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1884 {
1885 JVMWrapper("JVM_ConstantPoolGetUTF8At");
1886 JvmtiVMObjectAllocEventCollector oam;
1887 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1888 bounds_check(cp, index, CHECK_NULL);
1889 constantTag tag = cp->tag_at(index);
1890 if (!tag.is_symbol()) {
1891 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1892 }
1893 symbolOop sym_o = cp->symbol_at(index);
1894 symbolHandle sym(THREAD, sym_o);
1895 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1896 return (jstring) JNIHandles::make_local(str());
1897 }
1898 JVM_END
1901 // Assertion support. //////////////////////////////////////////////////////////
1903 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
1904 JVMWrapper("JVM_DesiredAssertionStatus");
1905 assert(cls != NULL, "bad class");
1907 oop r = JNIHandles::resolve(cls);
1908 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
1909 if (java_lang_Class::is_primitive(r)) return false;
1911 klassOop k = java_lang_Class::as_klassOop(r);
1912 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass");
1913 if (! Klass::cast(k)->oop_is_instance()) return false;
1915 ResourceMark rm(THREAD);
1916 const char* name = Klass::cast(k)->name()->as_C_string();
1917 bool system_class = Klass::cast(k)->class_loader() == NULL;
1918 return JavaAssertions::enabled(name, system_class);
1920 JVM_END
1923 // Return a new AssertionStatusDirectives object with the fields filled in with
1924 // command-line assertion arguments (i.e., -ea, -da).
1925 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
1926 JVMWrapper("JVM_AssertionStatusDirectives");
1927 JvmtiVMObjectAllocEventCollector oam;
1928 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
1929 return JNIHandles::make_local(env, asd);
1930 JVM_END
1932 // Verification ////////////////////////////////////////////////////////////////////////////////
1934 // Reflection for the verifier /////////////////////////////////////////////////////////////////
1936 // RedefineClasses support: bug 6214132 caused verification to fail.
1937 // All functions from this section should call the jvmtiThreadSate function:
1938 // klassOop class_to_verify_considering_redefinition(klassOop klass).
1939 // The function returns a klassOop of the _scratch_class if the verifier
1940 // was invoked in the middle of the class redefinition.
1941 // Otherwise it returns its argument value which is the _the_class klassOop.
1942 // Please, refer to the description in the jvmtiThreadSate.hpp.
1944 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
1945 JVMWrapper("JVM_GetClassNameUTF");
1946 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1947 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
1948 return Klass::cast(k)->name()->as_utf8();
1949 JVM_END
1952 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
1953 JVMWrapper("JVM_GetClassCPTypes");
1954 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1955 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
1956 // types will have length zero if this is not an instanceKlass
1957 // (length is determined by call to JVM_GetClassCPEntriesCount)
1958 if (Klass::cast(k)->oop_is_instance()) {
1959 constantPoolOop cp = instanceKlass::cast(k)->constants();
1960 for (int index = cp->length() - 1; index >= 0; index--) {
1961 constantTag tag = cp->tag_at(index);
1962 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class :
1963 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value();
1964 }
1965 }
1966 JVM_END
1969 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
1970 JVMWrapper("JVM_GetClassCPEntriesCount");
1971 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1972 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
1973 if (!Klass::cast(k)->oop_is_instance())
1974 return 0;
1975 return instanceKlass::cast(k)->constants()->length();
1976 JVM_END
1979 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
1980 JVMWrapper("JVM_GetClassFieldsCount");
1981 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1982 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
1983 if (!Klass::cast(k)->oop_is_instance())
1984 return 0;
1985 return instanceKlass::cast(k)->fields()->length() / instanceKlass::next_offset;
1986 JVM_END
1989 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
1990 JVMWrapper("JVM_GetClassMethodsCount");
1991 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1992 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
1993 if (!Klass::cast(k)->oop_is_instance())
1994 return 0;
1995 return instanceKlass::cast(k)->methods()->length();
1996 JVM_END
1999 // The following methods, used for the verifier, are never called with
2000 // array klasses, so a direct cast to instanceKlass is safe.
2001 // Typically, these methods are called in a loop with bounds determined
2002 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2003 // zero for arrays.
2004 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2005 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2006 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2007 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2008 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2009 int length = methodOop(method)->checked_exceptions_length();
2010 if (length > 0) {
2011 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start();
2012 for (int i = 0; i < length; i++) {
2013 exceptions[i] = table[i].class_cp_index;
2014 }
2015 }
2016 JVM_END
2019 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2020 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2021 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2022 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2023 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2024 return methodOop(method)->checked_exceptions_length();
2025 JVM_END
2028 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2029 JVMWrapper("JVM_GetMethodIxByteCode");
2030 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2031 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2032 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2033 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size());
2034 JVM_END
2037 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2038 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2039 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2040 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2041 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2042 return methodOop(method)->code_size();
2043 JVM_END
2046 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2047 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2048 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2049 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2050 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2051 typeArrayOop extable = methodOop(method)->exception_table();
2052 entry->start_pc = extable->int_at(entry_index * 4);
2053 entry->end_pc = extable->int_at(entry_index * 4 + 1);
2054 entry->handler_pc = extable->int_at(entry_index * 4 + 2);
2055 entry->catchType = extable->int_at(entry_index * 4 + 3);
2056 JVM_END
2059 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2060 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2061 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2062 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2063 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2064 return methodOop(method)->exception_table()->length() / 4;
2065 JVM_END
2068 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2069 JVMWrapper("JVM_GetMethodIxModifiers");
2070 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2071 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2072 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2073 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2074 JVM_END
2077 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2078 JVMWrapper("JVM_GetFieldIxModifiers");
2079 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2080 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2081 typeArrayOop fields = instanceKlass::cast(k)->fields();
2082 return fields->ushort_at(field_index * instanceKlass::next_offset + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2083 JVM_END
2086 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2087 JVMWrapper("JVM_GetMethodIxLocalsCount");
2088 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2089 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2090 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2091 return methodOop(method)->max_locals();
2092 JVM_END
2095 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2096 JVMWrapper("JVM_GetMethodIxArgsSize");
2097 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2098 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2099 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2100 return methodOop(method)->size_of_parameters();
2101 JVM_END
2104 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2105 JVMWrapper("JVM_GetMethodIxMaxStack");
2106 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2107 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2108 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2109 return methodOop(method)->max_stack();
2110 JVM_END
2113 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2114 JVMWrapper("JVM_IsConstructorIx");
2115 ResourceMark rm(THREAD);
2116 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2117 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2118 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2119 return methodOop(method)->name() == vmSymbols::object_initializer_name();
2120 JVM_END
2123 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2124 JVMWrapper("JVM_GetMethodIxIxUTF");
2125 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2126 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2127 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2128 return methodOop(method)->name()->as_utf8();
2129 JVM_END
2132 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2133 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2134 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2135 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2136 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2137 return methodOop(method)->signature()->as_utf8();
2138 JVM_END
2140 /**
2141 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2142 * read entries in the constant pool. Since the old verifier always
2143 * works on a copy of the code, it will not see any rewriting that
2144 * may possibly occur in the middle of verification. So it is important
2145 * that nothing it calls tries to use the cpCache instead of the raw
2146 * constant pool, so we must use cp->uncached_x methods when appropriate.
2147 */
2148 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2149 JVMWrapper("JVM_GetCPFieldNameUTF");
2150 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2151 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2152 constantPoolOop cp = instanceKlass::cast(k)->constants();
2153 switch (cp->tag_at(cp_index).value()) {
2154 case JVM_CONSTANT_Fieldref:
2155 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2156 default:
2157 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2158 }
2159 ShouldNotReachHere();
2160 return NULL;
2161 JVM_END
2164 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2165 JVMWrapper("JVM_GetCPMethodNameUTF");
2166 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2167 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2168 constantPoolOop cp = instanceKlass::cast(k)->constants();
2169 switch (cp->tag_at(cp_index).value()) {
2170 case JVM_CONSTANT_InterfaceMethodref:
2171 case JVM_CONSTANT_Methodref:
2172 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2173 default:
2174 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2175 }
2176 ShouldNotReachHere();
2177 return NULL;
2178 JVM_END
2181 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2182 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2183 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2184 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2185 constantPoolOop cp = instanceKlass::cast(k)->constants();
2186 switch (cp->tag_at(cp_index).value()) {
2187 case JVM_CONSTANT_InterfaceMethodref:
2188 case JVM_CONSTANT_Methodref:
2189 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2190 default:
2191 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2192 }
2193 ShouldNotReachHere();
2194 return NULL;
2195 JVM_END
2198 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2199 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2200 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2201 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2202 constantPoolOop cp = instanceKlass::cast(k)->constants();
2203 switch (cp->tag_at(cp_index).value()) {
2204 case JVM_CONSTANT_Fieldref:
2205 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2206 default:
2207 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2208 }
2209 ShouldNotReachHere();
2210 return NULL;
2211 JVM_END
2214 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2215 JVMWrapper("JVM_GetCPClassNameUTF");
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 symbolOop classname = cp->klass_name_at(cp_index);
2220 return classname->as_utf8();
2221 JVM_END
2224 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2225 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2226 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2227 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2228 constantPoolOop cp = instanceKlass::cast(k)->constants();
2229 switch (cp->tag_at(cp_index).value()) {
2230 case JVM_CONSTANT_Fieldref: {
2231 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2232 symbolOop classname = cp->klass_name_at(class_index);
2233 return classname->as_utf8();
2234 }
2235 default:
2236 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2237 }
2238 ShouldNotReachHere();
2239 return NULL;
2240 JVM_END
2243 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2244 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2245 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2246 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2247 constantPoolOop cp = instanceKlass::cast(k)->constants();
2248 switch (cp->tag_at(cp_index).value()) {
2249 case JVM_CONSTANT_Methodref:
2250 case JVM_CONSTANT_InterfaceMethodref: {
2251 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2252 symbolOop classname = cp->klass_name_at(class_index);
2253 return classname->as_utf8();
2254 }
2255 default:
2256 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2257 }
2258 ShouldNotReachHere();
2259 return NULL;
2260 JVM_END
2263 JVM_QUICK_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2264 JVMWrapper("JVM_GetCPFieldModifiers");
2265 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2266 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2267 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2268 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2269 constantPoolOop cp = instanceKlass::cast(k)->constants();
2270 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants();
2271 switch (cp->tag_at(cp_index).value()) {
2272 case JVM_CONSTANT_Fieldref: {
2273 symbolOop name = cp->uncached_name_ref_at(cp_index);
2274 symbolOop signature = cp->uncached_signature_ref_at(cp_index);
2275 typeArrayOop fields = instanceKlass::cast(k_called)->fields();
2276 int fields_count = fields->length();
2277 for (int i = 0; i < fields_count; i += instanceKlass::next_offset) {
2278 if (cp_called->symbol_at(fields->ushort_at(i + instanceKlass::name_index_offset)) == name &&
2279 cp_called->symbol_at(fields->ushort_at(i + instanceKlass::signature_index_offset)) == signature) {
2280 return fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2281 }
2282 }
2283 return -1;
2284 }
2285 default:
2286 fatal("JVM_GetCPFieldModifiers: illegal constant");
2287 }
2288 ShouldNotReachHere();
2289 return 0;
2290 JVM_END
2293 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2294 JVMWrapper("JVM_GetCPMethodModifiers");
2295 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2296 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2297 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2298 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2299 constantPoolOop cp = instanceKlass::cast(k)->constants();
2300 switch (cp->tag_at(cp_index).value()) {
2301 case JVM_CONSTANT_Methodref:
2302 case JVM_CONSTANT_InterfaceMethodref: {
2303 symbolOop name = cp->uncached_name_ref_at(cp_index);
2304 symbolOop signature = cp->uncached_signature_ref_at(cp_index);
2305 objArrayOop methods = instanceKlass::cast(k_called)->methods();
2306 int methods_count = methods->length();
2307 for (int i = 0; i < methods_count; i++) {
2308 methodOop method = methodOop(methods->obj_at(i));
2309 if (method->name() == name && method->signature() == signature) {
2310 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2311 }
2312 }
2313 return -1;
2314 }
2315 default:
2316 fatal("JVM_GetCPMethodModifiers: illegal constant");
2317 }
2318 ShouldNotReachHere();
2319 return 0;
2320 JVM_END
2323 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2325 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2326 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2327 JVM_END
2330 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2331 JVMWrapper("JVM_IsSameClassPackage");
2332 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2333 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2334 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror);
2335 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror);
2336 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2337 JVM_END
2340 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2342 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2343 JVMWrapper2("JVM_Open (%s)", fname);
2345 //%note jvm_r6
2346 int result = hpi::open(fname, flags, mode);
2347 if (result >= 0) {
2348 return result;
2349 } else {
2350 switch(errno) {
2351 case EEXIST:
2352 return JVM_EEXIST;
2353 default:
2354 return -1;
2355 }
2356 }
2357 JVM_END
2360 JVM_LEAF(jint, JVM_Close(jint fd))
2361 JVMWrapper2("JVM_Close (0x%x)", fd);
2362 //%note jvm_r6
2363 return hpi::close(fd);
2364 JVM_END
2367 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2368 JVMWrapper2("JVM_Read (0x%x)", fd);
2370 //%note jvm_r6
2371 return (jint)hpi::read(fd, buf, nbytes);
2372 JVM_END
2375 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2376 JVMWrapper2("JVM_Write (0x%x)", fd);
2378 //%note jvm_r6
2379 return (jint)hpi::write(fd, buf, nbytes);
2380 JVM_END
2383 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2384 JVMWrapper2("JVM_Available (0x%x)", fd);
2385 //%note jvm_r6
2386 return hpi::available(fd, pbytes);
2387 JVM_END
2390 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2391 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2392 //%note jvm_r6
2393 return hpi::lseek(fd, offset, whence);
2394 JVM_END
2397 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2398 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2399 return hpi::ftruncate(fd, length);
2400 JVM_END
2403 JVM_LEAF(jint, JVM_Sync(jint fd))
2404 JVMWrapper2("JVM_Sync (0x%x)", fd);
2405 //%note jvm_r6
2406 return hpi::fsync(fd);
2407 JVM_END
2410 // Printing support //////////////////////////////////////////////////
2411 extern "C" {
2413 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2414 // see bug 4399518, 4417214
2415 if ((intptr_t)count <= 0) return -1;
2416 return vsnprintf(str, count, fmt, args);
2417 }
2420 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2421 va_list args;
2422 int len;
2423 va_start(args, fmt);
2424 len = jio_vsnprintf(str, count, fmt, args);
2425 va_end(args);
2426 return len;
2427 }
2430 int jio_fprintf(FILE* f, const char *fmt, ...) {
2431 int len;
2432 va_list args;
2433 va_start(args, fmt);
2434 len = jio_vfprintf(f, fmt, args);
2435 va_end(args);
2436 return len;
2437 }
2440 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2441 if (Arguments::vfprintf_hook() != NULL) {
2442 return Arguments::vfprintf_hook()(f, fmt, args);
2443 } else {
2444 return vfprintf(f, fmt, args);
2445 }
2446 }
2449 int jio_printf(const char *fmt, ...) {
2450 int len;
2451 va_list args;
2452 va_start(args, fmt);
2453 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2454 va_end(args);
2455 return len;
2456 }
2459 // HotSpot specific jio method
2460 void jio_print(const char* s) {
2461 // Try to make this function as atomic as possible.
2462 if (Arguments::vfprintf_hook() != NULL) {
2463 jio_fprintf(defaultStream::output_stream(), "%s", s);
2464 } else {
2465 ::write(defaultStream::output_fd(), s, (int)strlen(s));
2466 }
2467 }
2469 } // Extern C
2471 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2473 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2474 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2475 // OSThread objects. The exception to this rule is when the target object is the thread
2476 // doing the operation, in which case we know that the thread won't exit until the
2477 // operation is done (all exits being voluntary). There are a few cases where it is
2478 // rather silly to do operations on yourself, like resuming yourself or asking whether
2479 // you are alive. While these can still happen, they are not subject to deadlocks if
2480 // the lock is held while the operation occurs (this is not the case for suspend, for
2481 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2482 // implementation is local to this file, we always lock Threads_lock for that one.
2484 static void thread_entry(JavaThread* thread, TRAPS) {
2485 HandleMark hm(THREAD);
2486 Handle obj(THREAD, thread->threadObj());
2487 JavaValue result(T_VOID);
2488 JavaCalls::call_virtual(&result,
2489 obj,
2490 KlassHandle(THREAD, SystemDictionary::thread_klass()),
2491 vmSymbolHandles::run_method_name(),
2492 vmSymbolHandles::void_method_signature(),
2493 THREAD);
2494 }
2497 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2498 JVMWrapper("JVM_StartThread");
2499 JavaThread *native_thread = NULL;
2501 // We cannot hold the Threads_lock when we throw an exception,
2502 // due to rank ordering issues. Example: we might need to grab the
2503 // Heap_lock while we construct the exception.
2504 bool throw_illegal_thread_state = false;
2506 // We must release the Threads_lock before we can post a jvmti event
2507 // in Thread::start.
2508 {
2509 // Ensure that the C++ Thread and OSThread structures aren't freed before
2510 // we operate.
2511 MutexLocker mu(Threads_lock);
2513 // Check to see if we're running a thread that's already exited or was
2514 // stopped (is_stillborn) or is still active (thread is not NULL).
2515 if (java_lang_Thread::is_stillborn(JNIHandles::resolve_non_null(jthread)) ||
2516 java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2517 throw_illegal_thread_state = true;
2518 } else {
2519 jlong size =
2520 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2521 // Allocate the C++ Thread structure and create the native thread. The
2522 // stack size retrieved from java is signed, but the constructor takes
2523 // size_t (an unsigned type), so avoid passing negative values which would
2524 // result in really large stacks.
2525 size_t sz = size > 0 ? (size_t) size : 0;
2526 native_thread = new JavaThread(&thread_entry, sz);
2528 // At this point it may be possible that no osthread was created for the
2529 // JavaThread due to lack of memory. Check for this situation and throw
2530 // an exception if necessary. Eventually we may want to change this so
2531 // that we only grab the lock if the thread was created successfully -
2532 // then we can also do this check and throw the exception in the
2533 // JavaThread constructor.
2534 if (native_thread->osthread() != NULL) {
2535 // Note: the current thread is not being used within "prepare".
2536 native_thread->prepare(jthread);
2537 }
2538 }
2539 }
2541 if (throw_illegal_thread_state) {
2542 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2543 }
2545 assert(native_thread != NULL, "Starting null thread?");
2547 if (native_thread->osthread() == NULL) {
2548 // No one should hold a reference to the 'native_thread'.
2549 delete native_thread;
2550 if (JvmtiExport::should_post_resource_exhausted()) {
2551 JvmtiExport::post_resource_exhausted(
2552 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2553 "unable to create new native thread");
2554 }
2555 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2556 "unable to create new native thread");
2557 }
2559 Thread::start(native_thread);
2561 JVM_END
2563 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2564 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2565 // but is thought to be reliable and simple. In the case, where the receiver is the
2566 // save thread as the sender, no safepoint is needed.
2567 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2568 JVMWrapper("JVM_StopThread");
2570 oop java_throwable = JNIHandles::resolve(throwable);
2571 if (java_throwable == NULL) {
2572 THROW(vmSymbols::java_lang_NullPointerException());
2573 }
2574 oop java_thread = JNIHandles::resolve_non_null(jthread);
2575 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2576 Events::log("JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", receiver, (address)java_thread, throwable);
2577 // First check if thread already exited
2578 if (receiver != NULL) {
2579 // Check if exception is getting thrown at self (use oop equality, since the
2580 // target object might exit)
2581 if (java_thread == thread->threadObj()) {
2582 // This is a change from JDK 1.1, but JDK 1.2 will also do it:
2583 // NOTE (from JDK 1.2): this is done solely to prevent stopped
2584 // threads from being restarted.
2585 // Fix for 4314342, 4145910, perhaps others: it now doesn't have
2586 // any effect on the "liveness" of a thread; see
2587 // JVM_IsThreadAlive, below.
2588 if (java_throwable->is_a(SystemDictionary::threaddeath_klass())) {
2589 java_lang_Thread::set_stillborn(java_thread);
2590 }
2591 THROW_OOP(java_throwable);
2592 } else {
2593 // Enques a VM_Operation to stop all threads and then deliver the exception...
2594 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2595 }
2596 }
2597 JVM_END
2600 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2601 JVMWrapper("JVM_IsThreadAlive");
2603 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2604 return java_lang_Thread::is_alive(thread_oop);
2605 JVM_END
2608 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2609 JVMWrapper("JVM_SuspendThread");
2610 oop java_thread = JNIHandles::resolve_non_null(jthread);
2611 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2613 if (receiver != NULL) {
2614 // thread has run and has not exited (still on threads list)
2616 {
2617 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2618 if (receiver->is_external_suspend()) {
2619 // Don't allow nested external suspend requests. We can't return
2620 // an error from this interface so just ignore the problem.
2621 return;
2622 }
2623 if (receiver->is_exiting()) { // thread is in the process of exiting
2624 return;
2625 }
2626 receiver->set_external_suspend();
2627 }
2629 // java_suspend() will catch threads in the process of exiting
2630 // and will ignore them.
2631 receiver->java_suspend();
2633 // It would be nice to have the following assertion in all the
2634 // time, but it is possible for a racing resume request to have
2635 // resumed this thread right after we suspended it. Temporarily
2636 // enable this assertion if you are chasing a different kind of
2637 // bug.
2638 //
2639 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2640 // receiver->is_being_ext_suspended(), "thread is not suspended");
2641 }
2642 JVM_END
2645 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2646 JVMWrapper("JVM_ResumeThread");
2647 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2648 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2649 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2650 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2651 // looks at it.
2652 MutexLocker ml(Threads_lock);
2653 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2654 if (thr != NULL) {
2655 // the thread has run and is not in the process of exiting
2656 thr->java_resume();
2657 }
2658 JVM_END
2661 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2662 JVMWrapper("JVM_SetThreadPriority");
2663 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2664 MutexLocker ml(Threads_lock);
2665 oop java_thread = JNIHandles::resolve_non_null(jthread);
2666 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2667 JavaThread* thr = java_lang_Thread::thread(java_thread);
2668 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
2669 Thread::set_priority(thr, (ThreadPriority)prio);
2670 }
2671 JVM_END
2674 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2675 JVMWrapper("JVM_Yield");
2676 if (os::dont_yield()) return;
2677 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2678 // Critical for similar threading behaviour
2679 if (ConvertYieldToSleep) {
2680 os::sleep(thread, MinSleepInterval, false);
2681 } else {
2682 os::yield();
2683 }
2684 JVM_END
2687 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2688 JVMWrapper("JVM_Sleep");
2690 if (millis < 0) {
2691 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2692 }
2694 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2695 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2696 }
2698 // Save current thread state and restore it at the end of this block.
2699 // And set new thread state to SLEEPING.
2700 JavaThreadSleepState jtss(thread);
2702 if (millis == 0) {
2703 // When ConvertSleepToYield is on, this matches the classic VM implementation of
2704 // JVM_Sleep. Critical for similar threading behaviour (Win32)
2705 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
2706 // for SOLARIS
2707 if (ConvertSleepToYield) {
2708 os::yield();
2709 } else {
2710 ThreadState old_state = thread->osthread()->get_state();
2711 thread->osthread()->set_state(SLEEPING);
2712 os::sleep(thread, MinSleepInterval, false);
2713 thread->osthread()->set_state(old_state);
2714 }
2715 } else {
2716 ThreadState old_state = thread->osthread()->get_state();
2717 thread->osthread()->set_state(SLEEPING);
2718 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2719 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2720 // us while we were sleeping. We do not overwrite those.
2721 if (!HAS_PENDING_EXCEPTION) {
2722 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2723 // to properly restore the thread state. That's likely wrong.
2724 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2725 }
2726 }
2727 thread->osthread()->set_state(old_state);
2728 }
2729 JVM_END
2731 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2732 JVMWrapper("JVM_CurrentThread");
2733 oop jthread = thread->threadObj();
2734 assert (thread != NULL, "no current thread!");
2735 return JNIHandles::make_local(env, jthread);
2736 JVM_END
2739 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
2740 JVMWrapper("JVM_CountStackFrames");
2742 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2743 oop java_thread = JNIHandles::resolve_non_null(jthread);
2744 bool throw_illegal_thread_state = false;
2745 int count = 0;
2747 {
2748 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2749 // We need to re-resolve the java_thread, since a GC might have happened during the
2750 // acquire of the lock
2751 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2753 if (thr == NULL) {
2754 // do nothing
2755 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
2756 // Check whether this java thread has been suspended already. If not, throws
2757 // IllegalThreadStateException. We defer to throw that exception until
2758 // Threads_lock is released since loading exception class has to leave VM.
2759 // The correct way to test a thread is actually suspended is
2760 // wait_for_ext_suspend_completion(), but we can't call that while holding
2761 // the Threads_lock. The above tests are sufficient for our purposes
2762 // provided the walkability of the stack is stable - which it isn't
2763 // 100% but close enough for most practical purposes.
2764 throw_illegal_thread_state = true;
2765 } else {
2766 // Count all java activation, i.e., number of vframes
2767 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
2768 // Native frames are not counted
2769 if (!vfst.method()->is_native()) count++;
2770 }
2771 }
2772 }
2774 if (throw_illegal_thread_state) {
2775 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
2776 "this thread is not suspended");
2777 }
2778 return count;
2779 JVM_END
2781 // Consider: A better way to implement JVM_Interrupt() is to acquire
2782 // Threads_lock to resolve the jthread into a Thread pointer, fetch
2783 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
2784 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
2785 // outside the critical section. Threads_lock is hot so we want to minimize
2786 // the hold-time. A cleaner interface would be to decompose interrupt into
2787 // two steps. The 1st phase, performed under Threads_lock, would return
2788 // a closure that'd be invoked after Threads_lock was dropped.
2789 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
2790 // admit spurious wakeups.
2792 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
2793 JVMWrapper("JVM_Interrupt");
2795 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2796 oop java_thread = JNIHandles::resolve_non_null(jthread);
2797 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2798 // We need to re-resolve the java_thread, since a GC might have happened during the
2799 // acquire of the lock
2800 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2801 if (thr != NULL) {
2802 Thread::interrupt(thr);
2803 }
2804 JVM_END
2807 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
2808 JVMWrapper("JVM_IsInterrupted");
2810 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2811 oop java_thread = JNIHandles::resolve_non_null(jthread);
2812 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2813 // We need to re-resolve the java_thread, since a GC might have happened during the
2814 // acquire of the lock
2815 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2816 if (thr == NULL) {
2817 return JNI_FALSE;
2818 } else {
2819 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
2820 }
2821 JVM_END
2824 // Return true iff the current thread has locked the object passed in
2826 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
2827 JVMWrapper("JVM_HoldsLock");
2828 assert(THREAD->is_Java_thread(), "sanity check");
2829 if (obj == NULL) {
2830 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
2831 }
2832 Handle h_obj(THREAD, JNIHandles::resolve(obj));
2833 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
2834 JVM_END
2837 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
2838 JVMWrapper("JVM_DumpAllStacks");
2839 VM_PrintThreads op;
2840 VMThread::execute(&op);
2841 if (JvmtiExport::should_post_data_dump()) {
2842 JvmtiExport::post_data_dump();
2843 }
2844 JVM_END
2847 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
2849 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
2850 assert(jthread->is_Java_thread(), "must be a Java thread");
2851 if (jthread->privileged_stack_top() == NULL) return false;
2852 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
2853 oop loader = jthread->privileged_stack_top()->class_loader();
2854 if (loader == NULL) return true;
2855 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
2856 if (trusted) return true;
2857 }
2858 return false;
2859 }
2861 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
2862 JVMWrapper("JVM_CurrentLoadedClass");
2863 ResourceMark rm(THREAD);
2865 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
2866 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
2867 bool trusted = is_trusted_frame(thread, &vfst);
2868 if (trusted) return NULL;
2870 methodOop m = vfst.method();
2871 if (!m->is_native()) {
2872 klassOop holder = m->method_holder();
2873 oop loader = instanceKlass::cast(holder)->class_loader();
2874 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
2875 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror());
2876 }
2877 }
2878 }
2879 return NULL;
2880 JVM_END
2883 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
2884 JVMWrapper("JVM_CurrentClassLoader");
2885 ResourceMark rm(THREAD);
2887 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
2889 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
2890 bool trusted = is_trusted_frame(thread, &vfst);
2891 if (trusted) return NULL;
2893 methodOop m = vfst.method();
2894 if (!m->is_native()) {
2895 klassOop holder = m->method_holder();
2896 assert(holder->is_klass(), "just checking");
2897 oop loader = instanceKlass::cast(holder)->class_loader();
2898 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
2899 return JNIHandles::make_local(env, loader);
2900 }
2901 }
2902 }
2903 return NULL;
2904 JVM_END
2907 // Utility object for collecting method holders walking down the stack
2908 class KlassLink: public ResourceObj {
2909 public:
2910 KlassHandle klass;
2911 KlassLink* next;
2913 KlassLink(KlassHandle k) { klass = k; next = NULL; }
2914 };
2917 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
2918 JVMWrapper("JVM_GetClassContext");
2919 ResourceMark rm(THREAD);
2920 JvmtiVMObjectAllocEventCollector oam;
2921 // Collect linked list of (handles to) method holders
2922 KlassLink* first = NULL;
2923 KlassLink* last = NULL;
2924 int depth = 0;
2926 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) {
2927 // Native frames are not returned
2928 if (!vfst.method()->is_native()) {
2929 klassOop holder = vfst.method()->method_holder();
2930 assert(holder->is_klass(), "just checking");
2931 depth++;
2932 KlassLink* l = new KlassLink(KlassHandle(thread, holder));
2933 if (first == NULL) {
2934 first = last = l;
2935 } else {
2936 last->next = l;
2937 last = l;
2938 }
2939 }
2940 }
2942 // Create result array of type [Ljava/lang/Class;
2943 objArrayOop result = oopFactory::new_objArray(SystemDictionary::class_klass(), depth, CHECK_NULL);
2944 // Fill in mirrors corresponding to method holders
2945 int index = 0;
2946 while (first != NULL) {
2947 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror());
2948 first = first->next;
2949 }
2950 assert(index == depth, "just checking");
2952 return (jobjectArray) JNIHandles::make_local(env, result);
2953 JVM_END
2956 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
2957 JVMWrapper("JVM_ClassDepth");
2958 ResourceMark rm(THREAD);
2959 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
2960 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
2962 const char* str = java_lang_String::as_utf8_string(class_name_str());
2963 symbolHandle class_name_sym =
2964 symbolHandle(THREAD, SymbolTable::probe(str, (int)strlen(str)));
2965 if (class_name_sym.is_null()) {
2966 return -1;
2967 }
2969 int depth = 0;
2971 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
2972 if (!vfst.method()->is_native()) {
2973 klassOop holder = vfst.method()->method_holder();
2974 assert(holder->is_klass(), "just checking");
2975 if (instanceKlass::cast(holder)->name() == class_name_sym()) {
2976 return depth;
2977 }
2978 depth++;
2979 }
2980 }
2981 return -1;
2982 JVM_END
2985 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
2986 JVMWrapper("JVM_ClassLoaderDepth");
2987 ResourceMark rm(THREAD);
2988 int depth = 0;
2989 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
2990 // if a method in a class in a trusted loader is in a doPrivileged, return -1
2991 bool trusted = is_trusted_frame(thread, &vfst);
2992 if (trusted) return -1;
2994 methodOop m = vfst.method();
2995 if (!m->is_native()) {
2996 klassOop holder = m->method_holder();
2997 assert(holder->is_klass(), "just checking");
2998 oop loader = instanceKlass::cast(holder)->class_loader();
2999 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3000 return depth;
3001 }
3002 depth++;
3003 }
3004 }
3005 return -1;
3006 JVM_END
3009 // java.lang.Package ////////////////////////////////////////////////////////////////
3012 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3013 JVMWrapper("JVM_GetSystemPackage");
3014 ResourceMark rm(THREAD);
3015 JvmtiVMObjectAllocEventCollector oam;
3016 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3017 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3018 return (jstring) JNIHandles::make_local(result);
3019 JVM_END
3022 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3023 JVMWrapper("JVM_GetSystemPackages");
3024 JvmtiVMObjectAllocEventCollector oam;
3025 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3026 return (jobjectArray) JNIHandles::make_local(result);
3027 JVM_END
3030 // ObjectInputStream ///////////////////////////////////////////////////////////////
3032 bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) {
3033 if (current_class == NULL) {
3034 return true;
3035 }
3036 if ((current_class == field_class) || access.is_public()) {
3037 return true;
3038 }
3040 if (access.is_protected()) {
3041 // See if current_class is a subclass of field_class
3042 if (Klass::cast(current_class)->is_subclass_of(field_class)) {
3043 return true;
3044 }
3045 }
3047 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class));
3048 }
3051 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3052 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3053 JVMWrapper("JVM_AllocateNewObject");
3054 JvmtiVMObjectAllocEventCollector oam;
3055 // Receiver is not used
3056 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3057 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3059 // Cannot instantiate primitive types
3060 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3061 ResourceMark rm(THREAD);
3062 THROW_0(vmSymbols::java_lang_InvalidClassException());
3063 }
3065 // Arrays not allowed here, must use JVM_AllocateNewArray
3066 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() ||
3067 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) {
3068 ResourceMark rm(THREAD);
3069 THROW_0(vmSymbols::java_lang_InvalidClassException());
3070 }
3072 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror));
3073 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror));
3075 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3077 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3078 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3080 // Make sure klass is initialized, since we are about to instantiate one of them.
3081 curr_klass->initialize(CHECK_NULL);
3083 methodHandle m (THREAD,
3084 init_klass->find_method(vmSymbols::object_initializer_name(),
3085 vmSymbols::void_method_signature()));
3086 if (m.is_null()) {
3087 ResourceMark rm(THREAD);
3088 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3089 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()),
3090 vmSymbols::object_initializer_name(),
3091 vmSymbols::void_method_signature()));
3092 }
3094 if (curr_klass == init_klass && !m->is_public()) {
3095 // Calling the constructor for class 'curr_klass'.
3096 // Only allow calls to a public no-arg constructor.
3097 // This path corresponds to creating an Externalizable object.
3098 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3099 }
3101 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3102 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3103 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3104 }
3106 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3107 // Call constructor m. This might call a constructor higher up in the hierachy
3108 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3110 return JNIHandles::make_local(obj());
3111 JVM_END
3114 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3115 JVMWrapper("JVM_AllocateNewArray");
3116 JvmtiVMObjectAllocEventCollector oam;
3117 oop mirror = JNIHandles::resolve_non_null(currClass);
3119 if (java_lang_Class::is_primitive(mirror)) {
3120 THROW_0(vmSymbols::java_lang_InvalidClassException());
3121 }
3122 klassOop k = java_lang_Class::as_klassOop(mirror);
3123 oop result;
3125 if (k->klass_part()->oop_is_typeArray()) {
3126 // typeArray
3127 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3128 } else if (k->klass_part()->oop_is_objArray()) {
3129 // objArray
3130 objArrayKlassHandle oak(THREAD, k);
3131 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3132 result = oak->allocate(length, CHECK_NULL);
3133 } else {
3134 THROW_0(vmSymbols::java_lang_InvalidClassException());
3135 }
3136 return JNIHandles::make_local(env, result);
3137 JVM_END
3140 // Return the first non-null class loader up the execution stack, or null
3141 // if only code from the null class loader is on the stack.
3143 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3144 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3145 // UseNewReflection
3146 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3147 klassOop holder = vfst.method()->method_holder();
3148 oop loader = instanceKlass::cast(holder)->class_loader();
3149 if (loader != NULL) {
3150 return JNIHandles::make_local(env, loader);
3151 }
3152 }
3153 return NULL;
3154 JVM_END
3157 // Load a class relative to the most recent class on the stack with a non-null
3158 // classloader.
3159 // This function has been deprecated and should not be considered part of the
3160 // specified JVM interface.
3162 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3163 jclass currClass, jstring currClassName))
3164 JVMWrapper("JVM_LoadClass0");
3165 // Receiver is not used
3166 ResourceMark rm(THREAD);
3168 // Class name argument is not guaranteed to be in internal format
3169 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3170 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3172 const char* str = java_lang_String::as_utf8_string(string());
3174 if (str == NULL || (int)strlen(str) > symbolOopDesc::max_length()) {
3175 // It's impossible to create this class; the name cannot fit
3176 // into the constant pool.
3177 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3178 }
3180 symbolHandle name = oopFactory::new_symbol_handle(str, CHECK_NULL);
3181 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3182 // Find the most recent class on the stack with a non-null classloader
3183 oop loader = NULL;
3184 oop protection_domain = NULL;
3185 if (curr_klass.is_null()) {
3186 for (vframeStream vfst(thread);
3187 !vfst.at_end() && loader == NULL;
3188 vfst.next()) {
3189 if (!vfst.method()->is_native()) {
3190 klassOop holder = vfst.method()->method_holder();
3191 loader = instanceKlass::cast(holder)->class_loader();
3192 protection_domain = instanceKlass::cast(holder)->protection_domain();
3193 }
3194 }
3195 } else {
3196 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass());
3197 loader = instanceKlass::cast(curr_klass_oop)->class_loader();
3198 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain();
3199 }
3200 Handle h_loader(THREAD, loader);
3201 Handle h_prot (THREAD, protection_domain);
3202 return find_class_from_class_loader(env, name, true, h_loader, h_prot,
3203 false, thread);
3204 JVM_END
3207 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3210 // resolve array handle and check arguments
3211 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3212 if (arr == NULL) {
3213 THROW_0(vmSymbols::java_lang_NullPointerException());
3214 }
3215 oop a = JNIHandles::resolve_non_null(arr);
3216 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) {
3217 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3218 }
3219 return arrayOop(a);
3220 }
3223 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3224 JVMWrapper("JVM_GetArrayLength");
3225 arrayOop a = check_array(env, arr, false, CHECK_0);
3226 return a->length();
3227 JVM_END
3230 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3231 JVMWrapper("JVM_Array_Get");
3232 JvmtiVMObjectAllocEventCollector oam;
3233 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3234 jvalue value;
3235 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3236 oop box = Reflection::box(&value, type, CHECK_NULL);
3237 return JNIHandles::make_local(env, box);
3238 JVM_END
3241 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3242 JVMWrapper("JVM_GetPrimitiveArrayElement");
3243 jvalue value;
3244 value.i = 0; // to initialize value before getting used in CHECK
3245 arrayOop a = check_array(env, arr, true, CHECK_(value));
3246 assert(a->is_typeArray(), "just checking");
3247 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3248 BasicType wide_type = (BasicType) wCode;
3249 if (type != wide_type) {
3250 Reflection::widen(&value, type, wide_type, CHECK_(value));
3251 }
3252 return value;
3253 JVM_END
3256 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3257 JVMWrapper("JVM_SetArrayElement");
3258 arrayOop a = check_array(env, arr, false, CHECK);
3259 oop box = JNIHandles::resolve(val);
3260 jvalue value;
3261 value.i = 0; // to initialize value before getting used in CHECK
3262 BasicType value_type;
3263 if (a->is_objArray()) {
3264 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3265 value_type = Reflection::unbox_for_regular_object(box, &value);
3266 } else {
3267 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3268 }
3269 Reflection::array_set(&value, a, index, value_type, CHECK);
3270 JVM_END
3273 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3274 JVMWrapper("JVM_SetPrimitiveArrayElement");
3275 arrayOop a = check_array(env, arr, true, CHECK);
3276 assert(a->is_typeArray(), "just checking");
3277 BasicType value_type = (BasicType) vCode;
3278 Reflection::array_set(&v, a, index, value_type, CHECK);
3279 JVM_END
3282 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3283 JVMWrapper("JVM_NewArray");
3284 JvmtiVMObjectAllocEventCollector oam;
3285 oop element_mirror = JNIHandles::resolve(eltClass);
3286 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3287 return JNIHandles::make_local(env, result);
3288 JVM_END
3291 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3292 JVMWrapper("JVM_NewMultiArray");
3293 JvmtiVMObjectAllocEventCollector oam;
3294 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3295 oop element_mirror = JNIHandles::resolve(eltClass);
3296 assert(dim_array->is_typeArray(), "just checking");
3297 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3298 return JNIHandles::make_local(env, result);
3299 JVM_END
3302 // Networking library support ////////////////////////////////////////////////////////////////////
3304 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3305 JVMWrapper("JVM_InitializeSocketLibrary");
3306 return hpi::initialize_socket_library();
3307 JVM_END
3310 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3311 JVMWrapper("JVM_Socket");
3312 return hpi::socket(domain, type, protocol);
3313 JVM_END
3316 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3317 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3318 //%note jvm_r6
3319 return hpi::socket_close(fd);
3320 JVM_END
3323 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3324 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3325 //%note jvm_r6
3326 return hpi::socket_shutdown(fd, howto);
3327 JVM_END
3330 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3331 JVMWrapper2("JVM_Recv (0x%x)", fd);
3332 //%note jvm_r6
3333 return hpi::recv(fd, buf, nBytes, flags);
3334 JVM_END
3337 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3338 JVMWrapper2("JVM_Send (0x%x)", fd);
3339 //%note jvm_r6
3340 return hpi::send(fd, buf, nBytes, flags);
3341 JVM_END
3344 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3345 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3346 //%note jvm_r6
3347 return hpi::timeout(fd, timeout);
3348 JVM_END
3351 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3352 JVMWrapper2("JVM_Listen (0x%x)", fd);
3353 //%note jvm_r6
3354 return hpi::listen(fd, count);
3355 JVM_END
3358 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3359 JVMWrapper2("JVM_Connect (0x%x)", fd);
3360 //%note jvm_r6
3361 return hpi::connect(fd, him, len);
3362 JVM_END
3365 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3366 JVMWrapper2("JVM_Bind (0x%x)", fd);
3367 //%note jvm_r6
3368 return hpi::bind(fd, him, len);
3369 JVM_END
3372 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3373 JVMWrapper2("JVM_Accept (0x%x)", fd);
3374 //%note jvm_r6
3375 return hpi::accept(fd, him, (int *)len);
3376 JVM_END
3379 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3380 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3381 //%note jvm_r6
3382 return hpi::recvfrom(fd, buf, nBytes, flags, from, fromlen);
3383 JVM_END
3386 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3387 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3388 //%note jvm_r6
3389 return hpi::get_sock_name(fd, him, len);
3390 JVM_END
3393 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3394 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3395 //%note jvm_r6
3396 return hpi::sendto(fd, buf, len, flags, to, tolen);
3397 JVM_END
3400 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3401 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3402 //%note jvm_r6
3403 return hpi::socket_available(fd, pbytes);
3404 JVM_END
3407 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3408 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3409 //%note jvm_r6
3410 return hpi::get_sock_opt(fd, level, optname, optval, optlen);
3411 JVM_END
3414 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3415 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3416 //%note jvm_r6
3417 return hpi::set_sock_opt(fd, level, optname, optval, optlen);
3418 JVM_END
3420 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3421 JVMWrapper("JVM_GetHostName");
3422 return hpi::get_host_name(name, namelen);
3423 JVM_END
3425 #ifdef _WINDOWS
3427 JVM_LEAF(struct hostent*, JVM_GetHostByAddr(const char* name, int len, int type))
3428 JVMWrapper("JVM_GetHostByAddr");
3429 return hpi::get_host_by_addr(name, len, type);
3430 JVM_END
3433 JVM_LEAF(struct hostent*, JVM_GetHostByName(char* name))
3434 JVMWrapper("JVM_GetHostByName");
3435 return hpi::get_host_by_name(name);
3436 JVM_END
3439 JVM_LEAF(struct protoent*, JVM_GetProtoByName(char* name))
3440 JVMWrapper("JVM_GetProtoByName");
3441 return hpi::get_proto_by_name(name);
3442 JVM_END
3444 #endif
3446 // Library support ///////////////////////////////////////////////////////////////////////////
3448 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3449 //%note jvm_ct
3450 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3451 char ebuf[1024];
3452 void *load_result;
3453 {
3454 ThreadToNativeFromVM ttnfvm(thread);
3455 load_result = hpi::dll_load(name, ebuf, sizeof ebuf);
3456 }
3457 if (load_result == NULL) {
3458 char msg[1024];
3459 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3460 // Since 'ebuf' may contain a string encoded using
3461 // platform encoding scheme, we need to pass
3462 // Exceptions::unsafe_to_utf8 to the new_exception method
3463 // as the last argument. See bug 6367357.
3464 Handle h_exception =
3465 Exceptions::new_exception(thread,
3466 vmSymbols::java_lang_UnsatisfiedLinkError(),
3467 msg, Exceptions::unsafe_to_utf8);
3469 THROW_HANDLE_0(h_exception);
3470 }
3471 return load_result;
3472 JVM_END
3475 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3476 JVMWrapper("JVM_UnloadLibrary");
3477 hpi::dll_unload(handle);
3478 JVM_END
3481 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3482 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3483 return hpi::dll_lookup(handle, name);
3484 JVM_END
3486 // Floating point support ////////////////////////////////////////////////////////////////////
3488 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3489 JVMWrapper("JVM_IsNaN");
3490 return g_isnan(a);
3491 JVM_END
3495 // JNI version ///////////////////////////////////////////////////////////////////////////////
3497 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3498 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3499 return Threads::is_supported_jni_version_including_1_1(version);
3500 JVM_END
3503 // String support ///////////////////////////////////////////////////////////////////////////
3505 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3506 JVMWrapper("JVM_InternString");
3507 JvmtiVMObjectAllocEventCollector oam;
3508 if (str == NULL) return NULL;
3509 oop string = JNIHandles::resolve_non_null(str);
3510 oop result = StringTable::intern(string, CHECK_NULL);
3511 return (jstring) JNIHandles::make_local(env, result);
3512 JVM_END
3515 // Raw monitor support //////////////////////////////////////////////////////////////////////
3517 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3518 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3519 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3520 // that only works with java threads.
3523 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3524 VM_Exit::block_if_vm_exited();
3525 JVMWrapper("JVM_RawMonitorCreate");
3526 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3527 }
3530 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3531 VM_Exit::block_if_vm_exited();
3532 JVMWrapper("JVM_RawMonitorDestroy");
3533 delete ((Mutex*) mon);
3534 }
3537 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3538 VM_Exit::block_if_vm_exited();
3539 JVMWrapper("JVM_RawMonitorEnter");
3540 ((Mutex*) mon)->jvm_raw_lock();
3541 return 0;
3542 }
3545 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3546 VM_Exit::block_if_vm_exited();
3547 JVMWrapper("JVM_RawMonitorExit");
3548 ((Mutex*) mon)->jvm_raw_unlock();
3549 }
3552 // Support for Serialization
3554 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3555 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3556 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3557 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3559 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3560 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3561 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3562 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3565 void initialize_converter_functions() {
3566 if (JDK_Version::is_gte_jdk14x_version()) {
3567 // These functions only exist for compatibility with 1.3.1 and earlier
3568 return;
3569 }
3571 // called from universe_post_init()
3572 assert(
3573 int_bits_to_float_fn == NULL &&
3574 long_bits_to_double_fn == NULL &&
3575 float_to_int_bits_fn == NULL &&
3576 double_to_long_bits_fn == NULL ,
3577 "initialization done twice"
3578 );
3579 // initialize
3580 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3581 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3582 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3583 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3584 // verify
3585 assert(
3586 int_bits_to_float_fn != NULL &&
3587 long_bits_to_double_fn != NULL &&
3588 float_to_int_bits_fn != NULL &&
3589 double_to_long_bits_fn != NULL ,
3590 "initialization failed"
3591 );
3592 }
3595 // Serialization
3596 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3597 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3598 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3600 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3601 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3602 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3603 oop o = JNIHandles::resolve(obj);
3605 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3606 THROW(vmSymbols::java_lang_NullPointerException());
3607 }
3609 jsize nfids = fids->length();
3610 if (nfids == 0) return;
3612 if (tcodes->length() < nfids) {
3613 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3614 }
3616 jsize off = 0;
3617 /* loop through fields, setting values */
3618 for (jsize i = 0; i < nfids; i++) {
3619 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3620 int field_offset;
3621 if (fid != NULL) {
3622 // NULL is a legal value for fid, but retrieving the field offset
3623 // trigger assertion in that case
3624 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3625 }
3627 switch (tcodes->char_at(i)) {
3628 case 'Z':
3629 if (fid != NULL) {
3630 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
3631 o->bool_field_put(field_offset, val);
3632 }
3633 off++;
3634 break;
3636 case 'B':
3637 if (fid != NULL) {
3638 o->byte_field_put(field_offset, dbuf->byte_at(off));
3639 }
3640 off++;
3641 break;
3643 case 'C':
3644 if (fid != NULL) {
3645 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3646 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3647 o->char_field_put(field_offset, val);
3648 }
3649 off += 2;
3650 break;
3652 case 'S':
3653 if (fid != NULL) {
3654 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3655 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3656 o->short_field_put(field_offset, val);
3657 }
3658 off += 2;
3659 break;
3661 case 'I':
3662 if (fid != NULL) {
3663 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3664 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3665 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3666 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3667 o->int_field_put(field_offset, ival);
3668 }
3669 off += 4;
3670 break;
3672 case 'F':
3673 if (fid != NULL) {
3674 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3675 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3676 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3677 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3678 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
3679 o->float_field_put(field_offset, fval);
3680 }
3681 off += 4;
3682 break;
3684 case 'J':
3685 if (fid != NULL) {
3686 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3687 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3688 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3689 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3690 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3691 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3692 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3693 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3694 o->long_field_put(field_offset, lval);
3695 }
3696 off += 8;
3697 break;
3699 case 'D':
3700 if (fid != NULL) {
3701 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3702 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3703 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3704 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3705 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3706 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3707 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3708 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3709 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
3710 o->double_field_put(field_offset, dval);
3711 }
3712 off += 8;
3713 break;
3715 default:
3716 // Illegal typecode
3717 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3718 }
3719 }
3720 JVM_END
3723 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3724 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3725 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3727 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3728 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3729 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3730 oop o = JNIHandles::resolve(obj);
3732 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3733 THROW(vmSymbols::java_lang_NullPointerException());
3734 }
3736 jsize nfids = fids->length();
3737 if (nfids == 0) return;
3739 if (tcodes->length() < nfids) {
3740 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3741 }
3743 /* loop through fields, fetching values */
3744 jsize off = 0;
3745 for (jsize i = 0; i < nfids; i++) {
3746 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3747 if (fid == NULL) {
3748 THROW(vmSymbols::java_lang_NullPointerException());
3749 }
3750 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3752 switch (tcodes->char_at(i)) {
3753 case 'Z':
3754 {
3755 jboolean val = o->bool_field(field_offset);
3756 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
3757 }
3758 break;
3760 case 'B':
3761 dbuf->byte_at_put(off++, o->byte_field(field_offset));
3762 break;
3764 case 'C':
3765 {
3766 jchar val = o->char_field(field_offset);
3767 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3768 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3769 }
3770 break;
3772 case 'S':
3773 {
3774 jshort val = o->short_field(field_offset);
3775 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3776 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3777 }
3778 break;
3780 case 'I':
3781 {
3782 jint val = o->int_field(field_offset);
3783 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
3784 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
3785 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3786 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3787 }
3788 break;
3790 case 'F':
3791 {
3792 jfloat fval = o->float_field(field_offset);
3793 jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
3794 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
3795 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
3796 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF);
3797 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF);
3798 }
3799 break;
3801 case 'J':
3802 {
3803 jlong val = o->long_field(field_offset);
3804 dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
3805 dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
3806 dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
3807 dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
3808 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
3809 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
3810 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3811 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3812 }
3813 break;
3815 case 'D':
3816 {
3817 jdouble dval = o->double_field(field_offset);
3818 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
3819 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
3820 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
3821 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
3822 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
3823 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
3824 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
3825 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF);
3826 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF);
3827 }
3828 break;
3830 default:
3831 // Illegal typecode
3832 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3833 }
3834 }
3835 JVM_END
3838 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3840 jclass find_class_from_class_loader(JNIEnv* env, symbolHandle name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
3841 // Security Note:
3842 // The Java level wrapper will perform the necessary security check allowing
3843 // us to pass the NULL as the initiating class loader.
3844 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3845 KlassHandle klass_handle(THREAD, klass);
3846 // Check if we should initialize the class
3847 if (init && klass_handle->oop_is_instance()) {
3848 klass_handle->initialize(CHECK_NULL);
3849 }
3850 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
3851 }
3854 // Internal SQE debugging support ///////////////////////////////////////////////////////////
3856 #ifndef PRODUCT
3858 extern "C" {
3859 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
3860 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
3861 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
3862 }
3864 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
3865 JVMWrapper("JVM_AccessBoolVMFlag");
3866 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
3867 JVM_END
3869 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
3870 JVMWrapper("JVM_AccessVMIntFlag");
3871 intx v;
3872 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
3873 *value = (jint)v;
3874 return result;
3875 JVM_END
3878 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
3879 JVMWrapper("JVM_VMBreakPoint");
3880 oop the_obj = JNIHandles::resolve(obj);
3881 BREAKPOINT;
3882 JVM_END
3885 #endif
3888 //---------------------------------------------------------------------------
3889 //
3890 // Support for old native code-based reflection (pre-JDK 1.4)
3891 // Disabled by default in the product build.
3892 //
3893 // See reflection.hpp for information on SUPPORT_OLD_REFLECTION
3894 //
3895 //---------------------------------------------------------------------------
3897 #ifdef SUPPORT_OLD_REFLECTION
3899 JVM_ENTRY(jobjectArray, JVM_GetClassFields(JNIEnv *env, jclass cls, jint which))
3900 JVMWrapper("JVM_GetClassFields");
3901 JvmtiVMObjectAllocEventCollector oam;
3902 oop mirror = JNIHandles::resolve_non_null(cls);
3903 objArrayOop result = Reflection::reflect_fields(mirror, which, CHECK_NULL);
3904 return (jobjectArray) JNIHandles::make_local(env, result);
3905 JVM_END
3908 JVM_ENTRY(jobjectArray, JVM_GetClassMethods(JNIEnv *env, jclass cls, jint which))
3909 JVMWrapper("JVM_GetClassMethods");
3910 JvmtiVMObjectAllocEventCollector oam;
3911 oop mirror = JNIHandles::resolve_non_null(cls);
3912 objArrayOop result = Reflection::reflect_methods(mirror, which, CHECK_NULL);
3913 //%note jvm_r4
3914 return (jobjectArray) JNIHandles::make_local(env, result);
3915 JVM_END
3918 JVM_ENTRY(jobjectArray, JVM_GetClassConstructors(JNIEnv *env, jclass cls, jint which))
3919 JVMWrapper("JVM_GetClassConstructors");
3920 JvmtiVMObjectAllocEventCollector oam;
3921 oop mirror = JNIHandles::resolve_non_null(cls);
3922 objArrayOop result = Reflection::reflect_constructors(mirror, which, CHECK_NULL);
3923 //%note jvm_r4
3924 return (jobjectArray) JNIHandles::make_local(env, result);
3925 JVM_END
3928 JVM_ENTRY(jobject, JVM_GetClassField(JNIEnv *env, jclass cls, jstring name, jint which))
3929 JVMWrapper("JVM_GetClassField");
3930 JvmtiVMObjectAllocEventCollector oam;
3931 if (name == NULL) return NULL;
3932 Handle str (THREAD, JNIHandles::resolve_non_null(name));
3934 const char* cstr = java_lang_String::as_utf8_string(str());
3935 symbolHandle field_name =
3936 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr)));
3937 if (field_name.is_null()) {
3938 THROW_0(vmSymbols::java_lang_NoSuchFieldException());
3939 }
3941 oop mirror = JNIHandles::resolve_non_null(cls);
3942 oop result = Reflection::reflect_field(mirror, field_name(), which, CHECK_NULL);
3943 if (result == NULL) {
3944 THROW_0(vmSymbols::java_lang_NoSuchFieldException());
3945 }
3946 return JNIHandles::make_local(env, result);
3947 JVM_END
3950 JVM_ENTRY(jobject, JVM_GetClassMethod(JNIEnv *env, jclass cls, jstring name, jobjectArray types, jint which))
3951 JVMWrapper("JVM_GetClassMethod");
3952 JvmtiVMObjectAllocEventCollector oam;
3953 if (name == NULL) {
3954 THROW_0(vmSymbols::java_lang_NullPointerException());
3955 }
3956 Handle str (THREAD, JNIHandles::resolve_non_null(name));
3958 const char* cstr = java_lang_String::as_utf8_string(str());
3959 symbolHandle method_name =
3960 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr)));
3961 if (method_name.is_null()) {
3962 THROW_0(vmSymbols::java_lang_NoSuchMethodException());
3963 }
3965 oop mirror = JNIHandles::resolve_non_null(cls);
3966 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types)));
3967 oop result = Reflection::reflect_method(mirror, method_name, tarray,
3968 which, CHECK_NULL);
3969 if (result == NULL) {
3970 THROW_0(vmSymbols::java_lang_NoSuchMethodException());
3971 }
3972 return JNIHandles::make_local(env, result);
3973 JVM_END
3976 JVM_ENTRY(jobject, JVM_GetClassConstructor(JNIEnv *env, jclass cls, jobjectArray types, jint which))
3977 JVMWrapper("JVM_GetClassConstructor");
3978 JvmtiVMObjectAllocEventCollector oam;
3979 oop mirror = JNIHandles::resolve_non_null(cls);
3980 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types)));
3981 oop result = Reflection::reflect_constructor(mirror, tarray, which, CHECK_NULL);
3982 if (result == NULL) {
3983 THROW_0(vmSymbols::java_lang_NoSuchMethodException());
3984 }
3985 return (jobject) JNIHandles::make_local(env, result);
3986 JVM_END
3989 // Instantiation ///////////////////////////////////////////////////////////////////////////////
3991 JVM_ENTRY(jobject, JVM_NewInstance(JNIEnv *env, jclass cls))
3992 JVMWrapper("JVM_NewInstance");
3993 Handle mirror(THREAD, JNIHandles::resolve_non_null(cls));
3995 methodOop resolved_constructor = java_lang_Class::resolved_constructor(mirror());
3996 if (resolved_constructor == NULL) {
3997 klassOop k = java_lang_Class::as_klassOop(mirror());
3998 // The java.lang.Class object caches a resolved constructor if all the checks
3999 // below were done successfully and a constructor was found.
4001 // Do class based checks
4002 if (java_lang_Class::is_primitive(mirror())) {
4003 const char* msg = "";
4004 if (mirror == Universe::bool_mirror()) msg = "java/lang/Boolean";
4005 else if (mirror == Universe::char_mirror()) msg = "java/lang/Character";
4006 else if (mirror == Universe::float_mirror()) msg = "java/lang/Float";
4007 else if (mirror == Universe::double_mirror()) msg = "java/lang/Double";
4008 else if (mirror == Universe::byte_mirror()) msg = "java/lang/Byte";
4009 else if (mirror == Universe::short_mirror()) msg = "java/lang/Short";
4010 else if (mirror == Universe::int_mirror()) msg = "java/lang/Integer";
4011 else if (mirror == Universe::long_mirror()) msg = "java/lang/Long";
4012 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), msg);
4013 }
4015 // Check whether we are allowed to instantiate this class
4016 Klass::cast(k)->check_valid_for_instantiation(false, CHECK_NULL); // Array classes get caught here
4017 instanceKlassHandle klass(THREAD, k);
4018 // Make sure class is initialized (also so all methods are rewritten)
4019 klass->initialize(CHECK_NULL);
4021 // Lookup default constructor
4022 resolved_constructor = klass->find_method(vmSymbols::object_initializer_name(), vmSymbols::void_method_signature());
4023 if (resolved_constructor == NULL) {
4024 ResourceMark rm(THREAD);
4025 THROW_MSG_0(vmSymbols::java_lang_InstantiationException(), klass->external_name());
4026 }
4028 // Cache result in java.lang.Class object. Does not have to be MT safe.
4029 java_lang_Class::set_resolved_constructor(mirror(), resolved_constructor);
4030 }
4032 assert(resolved_constructor != NULL, "sanity check");
4033 methodHandle constructor = methodHandle(THREAD, resolved_constructor);
4035 // We have an initialized instanceKlass with a default constructor
4036 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
4037 assert(klass->is_initialized() || klass->is_being_initialized(), "sanity check");
4039 // Do security check
4040 klassOop caller_klass = NULL;
4041 if (UsePrivilegedStack) {
4042 caller_klass = thread->security_get_caller_class(2);
4044 if (!Reflection::verify_class_access(caller_klass, klass(), false) ||
4045 !Reflection::verify_field_access(caller_klass,
4046 klass(),
4047 klass(),
4048 constructor->access_flags(),
4049 false,
4050 true)) {
4051 ResourceMark rm(THREAD);
4052 THROW_MSG_0(vmSymbols::java_lang_IllegalAccessException(), klass->external_name());
4053 }
4054 }
4056 // Allocate object and call constructor
4057 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
4058 JavaCalls::call_default_constructor(thread, constructor, receiver, CHECK_NULL);
4060 jobject res = JNIHandles::make_local(env, receiver());
4061 if (JvmtiExport::should_post_vm_object_alloc()) {
4062 JvmtiExport::post_vm_object_alloc(JavaThread::current(), receiver());
4063 }
4064 return res;
4065 JVM_END
4068 // Field ////////////////////////////////////////////////////////////////////////////////////////////
4070 JVM_ENTRY(jobject, JVM_GetField(JNIEnv *env, jobject field, jobject obj))
4071 JVMWrapper("JVM_GetField");
4072 JvmtiVMObjectAllocEventCollector oam;
4073 Handle field_mirror(thread, JNIHandles::resolve(field));
4074 Handle receiver (thread, JNIHandles::resolve(obj));
4075 fieldDescriptor fd;
4076 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_NULL);
4077 jvalue value;
4078 BasicType type = Reflection::field_get(&value, &fd, receiver);
4079 oop box = Reflection::box(&value, type, CHECK_NULL);
4080 return JNIHandles::make_local(env, box);
4081 JVM_END
4084 JVM_ENTRY(jvalue, JVM_GetPrimitiveField(JNIEnv *env, jobject field, jobject obj, unsigned char wCode))
4085 JVMWrapper("JVM_GetPrimitiveField");
4086 Handle field_mirror(thread, JNIHandles::resolve(field));
4087 Handle receiver (thread, JNIHandles::resolve(obj));
4088 fieldDescriptor fd;
4089 jvalue value;
4090 value.j = 0;
4091 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_(value));
4092 BasicType type = Reflection::field_get(&value, &fd, receiver);
4093 BasicType wide_type = (BasicType) wCode;
4094 if (type != wide_type) {
4095 Reflection::widen(&value, type, wide_type, CHECK_(value));
4096 }
4097 return value;
4098 JVM_END // should really be JVM_END, but that doesn't work for union types!
4101 JVM_ENTRY(void, JVM_SetField(JNIEnv *env, jobject field, jobject obj, jobject val))
4102 JVMWrapper("JVM_SetField");
4103 Handle field_mirror(thread, JNIHandles::resolve(field));
4104 Handle receiver (thread, JNIHandles::resolve(obj));
4105 oop box = JNIHandles::resolve(val);
4106 fieldDescriptor fd;
4107 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK);
4108 BasicType field_type = fd.field_type();
4109 jvalue value;
4110 BasicType value_type;
4111 if (field_type == T_OBJECT || field_type == T_ARRAY) {
4112 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
4113 value_type = Reflection::unbox_for_regular_object(box, &value);
4114 Reflection::field_set(&value, &fd, receiver, field_type, CHECK);
4115 } else {
4116 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
4117 Reflection::field_set(&value, &fd, receiver, value_type, CHECK);
4118 }
4119 JVM_END
4122 JVM_ENTRY(void, JVM_SetPrimitiveField(JNIEnv *env, jobject field, jobject obj, jvalue v, unsigned char vCode))
4123 JVMWrapper("JVM_SetPrimitiveField");
4124 Handle field_mirror(thread, JNIHandles::resolve(field));
4125 Handle receiver (thread, JNIHandles::resolve(obj));
4126 fieldDescriptor fd;
4127 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK);
4128 BasicType value_type = (BasicType) vCode;
4129 Reflection::field_set(&v, &fd, receiver, value_type, CHECK);
4130 JVM_END
4133 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4135 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4136 JVMWrapper("JVM_InvokeMethod");
4137 Handle method_handle;
4138 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4139 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4140 Handle receiver(THREAD, JNIHandles::resolve(obj));
4141 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4142 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4143 jobject res = JNIHandles::make_local(env, result);
4144 if (JvmtiExport::should_post_vm_object_alloc()) {
4145 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4146 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4147 if (java_lang_Class::is_primitive(ret_type)) {
4148 // Only for primitive type vm allocates memory for java object.
4149 // See box() method.
4150 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4151 }
4152 }
4153 return res;
4154 } else {
4155 THROW_0(vmSymbols::java_lang_StackOverflowError());
4156 }
4157 JVM_END
4160 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4161 JVMWrapper("JVM_NewInstanceFromConstructor");
4162 oop constructor_mirror = JNIHandles::resolve(c);
4163 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4164 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4165 jobject res = JNIHandles::make_local(env, result);
4166 if (JvmtiExport::should_post_vm_object_alloc()) {
4167 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4168 }
4169 return res;
4170 JVM_END
4172 #endif /* SUPPORT_OLD_REFLECTION */
4174 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4176 JVM_LEAF(jboolean, JVM_SupportsCX8())
4177 JVMWrapper("JVM_SupportsCX8");
4178 return VM_Version::supports_cx8();
4179 JVM_END
4182 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4183 JVMWrapper("JVM_CX8Field");
4184 jlong res;
4185 oop o = JNIHandles::resolve(obj);
4186 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4187 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4189 assert(VM_Version::supports_cx8(), "cx8 not supported");
4190 res = Atomic::cmpxchg(newVal, addr, oldVal);
4192 return res == oldVal;
4193 JVM_END
4195 // DTrace ///////////////////////////////////////////////////////////////////
4197 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4198 JVMWrapper("JVM_DTraceGetVersion");
4199 return (jint)JVM_TRACING_DTRACE_VERSION;
4200 JVM_END
4202 JVM_ENTRY(jlong,JVM_DTraceActivate(
4203 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4204 JVM_DTraceProvider* providers))
4205 JVMWrapper("JVM_DTraceActivate");
4206 return DTraceJSDT::activate(
4207 version, module_name, providers_count, providers, CHECK_0);
4208 JVM_END
4210 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4211 JVMWrapper("JVM_DTraceIsProbeEnabled");
4212 return DTraceJSDT::is_probe_enabled(method);
4213 JVM_END
4215 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4216 JVMWrapper("JVM_DTraceDispose");
4217 DTraceJSDT::dispose(handle);
4218 JVM_END
4220 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4221 JVMWrapper("JVM_DTraceIsSupported");
4222 return DTraceJSDT::is_supported();
4223 JVM_END
4225 // Returns an array of all live Thread objects (VM internal JavaThreads,
4226 // jvmti agent threads, and JNI attaching threads are skipped)
4227 // See CR 6404306 regarding JNI attaching threads
4228 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4229 ResourceMark rm(THREAD);
4230 ThreadsListEnumerator tle(THREAD, false, false);
4231 JvmtiVMObjectAllocEventCollector oam;
4233 int num_threads = tle.num_threads();
4234 objArrayOop r = oopFactory::new_objArray(SystemDictionary::thread_klass(), num_threads, CHECK_NULL);
4235 objArrayHandle threads_ah(THREAD, r);
4237 for (int i = 0; i < num_threads; i++) {
4238 Handle h = tle.get_threadObj(i);
4239 threads_ah->obj_at_put(i, h());
4240 }
4242 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4243 JVM_END
4246 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4247 // Return StackTraceElement[][], each element is the stack trace of a thread in
4248 // the corresponding entry in the given threads array
4249 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4250 JVMWrapper("JVM_DumpThreads");
4251 JvmtiVMObjectAllocEventCollector oam;
4253 // Check if threads is null
4254 if (threads == NULL) {
4255 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4256 }
4258 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4259 objArrayHandle ah(THREAD, a);
4260 int num_threads = ah->length();
4261 // check if threads is non-empty array
4262 if (num_threads == 0) {
4263 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4264 }
4266 // check if threads is not an array of objects of Thread class
4267 klassOop k = objArrayKlass::cast(ah->klass())->element_klass();
4268 if (k != SystemDictionary::thread_klass()) {
4269 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4270 }
4272 ResourceMark rm(THREAD);
4274 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4275 for (int i = 0; i < num_threads; i++) {
4276 oop thread_obj = ah->obj_at(i);
4277 instanceHandle h(THREAD, (instanceOop) thread_obj);
4278 thread_handle_array->append(h);
4279 }
4281 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4282 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4284 JVM_END
4286 // JVM monitoring and management support
4287 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4288 return Management::get_jmm_interface(version);
4289 JVM_END
4291 // com.sun.tools.attach.VirtualMachine agent properties support
4292 //
4293 // Initialize the agent properties with the properties maintained in the VM
4294 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4295 JVMWrapper("JVM_InitAgentProperties");
4296 ResourceMark rm;
4298 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4300 PUTPROP(props, "sun.java.command", Arguments::java_command());
4301 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4302 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4303 return properties;
4304 JVM_END
4306 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4307 {
4308 JVMWrapper("JVM_GetEnclosingMethodInfo");
4309 JvmtiVMObjectAllocEventCollector oam;
4311 if (ofClass == NULL) {
4312 return NULL;
4313 }
4314 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4315 // Special handling for primitive objects
4316 if (java_lang_Class::is_primitive(mirror())) {
4317 return NULL;
4318 }
4319 klassOop k = java_lang_Class::as_klassOop(mirror());
4320 if (!Klass::cast(k)->oop_is_instance()) {
4321 return NULL;
4322 }
4323 instanceKlassHandle ik_h(THREAD, k);
4324 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4325 if (encl_method_class_idx == 0) {
4326 return NULL;
4327 }
4328 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::object_klass(), 3, CHECK_NULL);
4329 objArrayHandle dest(THREAD, dest_o);
4330 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4331 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror());
4332 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4333 if (encl_method_method_idx != 0) {
4334 symbolOop sym_o = ik_h->constants()->symbol_at(
4335 extract_low_short_from_int(
4336 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4337 symbolHandle sym(THREAD, sym_o);
4338 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4339 dest->obj_at_put(1, str());
4340 sym_o = ik_h->constants()->symbol_at(
4341 extract_high_short_from_int(
4342 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4343 sym = symbolHandle(THREAD, sym_o);
4344 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4345 dest->obj_at_put(2, str());
4346 }
4347 return (jobjectArray) JNIHandles::make_local(dest());
4348 }
4349 JVM_END
4351 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4352 jint javaThreadState))
4353 {
4354 // If new thread states are added in future JDK and VM versions,
4355 // this should check if the JDK version is compatible with thread
4356 // states supported by the VM. Return NULL if not compatible.
4357 //
4358 // This function must map the VM java_lang_Thread::ThreadStatus
4359 // to the Java thread state that the JDK supports.
4360 //
4362 typeArrayHandle values_h;
4363 switch (javaThreadState) {
4364 case JAVA_THREAD_STATE_NEW : {
4365 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4366 values_h = typeArrayHandle(THREAD, r);
4367 values_h->int_at_put(0, java_lang_Thread::NEW);
4368 break;
4369 }
4370 case JAVA_THREAD_STATE_RUNNABLE : {
4371 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4372 values_h = typeArrayHandle(THREAD, r);
4373 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4374 break;
4375 }
4376 case JAVA_THREAD_STATE_BLOCKED : {
4377 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4378 values_h = typeArrayHandle(THREAD, r);
4379 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4380 break;
4381 }
4382 case JAVA_THREAD_STATE_WAITING : {
4383 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4384 values_h = typeArrayHandle(THREAD, r);
4385 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4386 values_h->int_at_put(1, java_lang_Thread::PARKED);
4387 break;
4388 }
4389 case JAVA_THREAD_STATE_TIMED_WAITING : {
4390 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4391 values_h = typeArrayHandle(THREAD, r);
4392 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4393 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4394 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4395 break;
4396 }
4397 case JAVA_THREAD_STATE_TERMINATED : {
4398 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4399 values_h = typeArrayHandle(THREAD, r);
4400 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4401 break;
4402 }
4403 default:
4404 // Unknown state - probably incompatible JDK version
4405 return NULL;
4406 }
4408 return (jintArray) JNIHandles::make_local(env, values_h());
4409 }
4410 JVM_END
4413 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4414 jint javaThreadState,
4415 jintArray values))
4416 {
4417 // If new thread states are added in future JDK and VM versions,
4418 // this should check if the JDK version is compatible with thread
4419 // states supported by the VM. Return NULL if not compatible.
4420 //
4421 // This function must map the VM java_lang_Thread::ThreadStatus
4422 // to the Java thread state that the JDK supports.
4423 //
4425 ResourceMark rm;
4427 // Check if threads is null
4428 if (values == NULL) {
4429 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4430 }
4432 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4433 typeArrayHandle values_h(THREAD, v);
4435 objArrayHandle names_h;
4436 switch (javaThreadState) {
4437 case JAVA_THREAD_STATE_NEW : {
4438 assert(values_h->length() == 1 &&
4439 values_h->int_at(0) == java_lang_Thread::NEW,
4440 "Invalid threadStatus value");
4442 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4443 1, /* only 1 substate */
4444 CHECK_NULL);
4445 names_h = objArrayHandle(THREAD, r);
4446 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4447 names_h->obj_at_put(0, name());
4448 break;
4449 }
4450 case JAVA_THREAD_STATE_RUNNABLE : {
4451 assert(values_h->length() == 1 &&
4452 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4453 "Invalid threadStatus value");
4455 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4456 1, /* only 1 substate */
4457 CHECK_NULL);
4458 names_h = objArrayHandle(THREAD, r);
4459 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4460 names_h->obj_at_put(0, name());
4461 break;
4462 }
4463 case JAVA_THREAD_STATE_BLOCKED : {
4464 assert(values_h->length() == 1 &&
4465 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4466 "Invalid threadStatus value");
4468 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4469 1, /* only 1 substate */
4470 CHECK_NULL);
4471 names_h = objArrayHandle(THREAD, r);
4472 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4473 names_h->obj_at_put(0, name());
4474 break;
4475 }
4476 case JAVA_THREAD_STATE_WAITING : {
4477 assert(values_h->length() == 2 &&
4478 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4479 values_h->int_at(1) == java_lang_Thread::PARKED,
4480 "Invalid threadStatus value");
4481 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4482 2, /* number of substates */
4483 CHECK_NULL);
4484 names_h = objArrayHandle(THREAD, r);
4485 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4486 CHECK_NULL);
4487 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4488 CHECK_NULL);
4489 names_h->obj_at_put(0, name0());
4490 names_h->obj_at_put(1, name1());
4491 break;
4492 }
4493 case JAVA_THREAD_STATE_TIMED_WAITING : {
4494 assert(values_h->length() == 3 &&
4495 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4496 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4497 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4498 "Invalid threadStatus value");
4499 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4500 3, /* number of substates */
4501 CHECK_NULL);
4502 names_h = objArrayHandle(THREAD, r);
4503 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4504 CHECK_NULL);
4505 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4506 CHECK_NULL);
4507 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4508 CHECK_NULL);
4509 names_h->obj_at_put(0, name0());
4510 names_h->obj_at_put(1, name1());
4511 names_h->obj_at_put(2, name2());
4512 break;
4513 }
4514 case JAVA_THREAD_STATE_TERMINATED : {
4515 assert(values_h->length() == 1 &&
4516 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4517 "Invalid threadStatus value");
4518 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4519 1, /* only 1 substate */
4520 CHECK_NULL);
4521 names_h = objArrayHandle(THREAD, r);
4522 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4523 names_h->obj_at_put(0, name());
4524 break;
4525 }
4526 default:
4527 // Unknown state - probably incompatible JDK version
4528 return NULL;
4529 }
4530 return (jobjectArray) JNIHandles::make_local(env, names_h());
4531 }
4532 JVM_END
4534 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4535 {
4536 memset(info, 0, sizeof(info_size));
4538 info->jvm_version = Abstract_VM_Version::jvm_version();
4539 info->update_version = 0; /* 0 in HotSpot Express VM */
4540 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4542 // when we add a new capability in the jvm_version_info struct, we should also
4543 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4544 // counter defined in runtimeService.cpp.
4545 info->is_attachable = AttachListener::is_attach_supported();
4546 #ifdef KERNEL
4547 info->is_kernel_jvm = 1; // true;
4548 #else // KERNEL
4549 info->is_kernel_jvm = 0; // false;
4550 #endif // KERNEL
4551 }
4552 JVM_END