Thu, 23 May 2013 12:44:18 +0100
Merge
1 /*
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #include "precompiled.hpp"
26 #include "classfile/classLoader.hpp"
27 #include "classfile/javaAssertions.hpp"
28 #include "classfile/javaClasses.hpp"
29 #include "classfile/symbolTable.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "gc_interface/collectedHeap.inline.hpp"
33 #include "interpreter/bytecode.hpp"
34 #include "memory/oopFactory.hpp"
35 #include "memory/universe.inline.hpp"
36 #include "oops/fieldStreams.hpp"
37 #include "oops/instanceKlass.hpp"
38 #include "oops/objArrayKlass.hpp"
39 #include "oops/method.hpp"
40 #include "prims/jvm.h"
41 #include "prims/jvm_misc.hpp"
42 #include "prims/jvmtiExport.hpp"
43 #include "prims/jvmtiThreadState.hpp"
44 #include "prims/nativeLookup.hpp"
45 #include "prims/privilegedStack.hpp"
46 #include "runtime/arguments.hpp"
47 #include "runtime/dtraceJSDT.hpp"
48 #include "runtime/handles.inline.hpp"
49 #include "runtime/init.hpp"
50 #include "runtime/interfaceSupport.hpp"
51 #include "runtime/java.hpp"
52 #include "runtime/javaCalls.hpp"
53 #include "runtime/jfieldIDWorkaround.hpp"
54 #include "runtime/os.hpp"
55 #include "runtime/perfData.hpp"
56 #include "runtime/reflection.hpp"
57 #include "runtime/vframe.hpp"
58 #include "runtime/vm_operations.hpp"
59 #include "services/attachListener.hpp"
60 #include "services/management.hpp"
61 #include "services/threadService.hpp"
62 #include "utilities/copy.hpp"
63 #include "utilities/defaultStream.hpp"
64 #include "utilities/dtrace.hpp"
65 #include "utilities/events.hpp"
66 #include "utilities/histogram.hpp"
67 #include "utilities/top.hpp"
68 #include "utilities/utf8.hpp"
69 #ifdef TARGET_OS_FAMILY_linux
70 # include "jvm_linux.h"
71 #endif
72 #ifdef TARGET_OS_FAMILY_solaris
73 # include "jvm_solaris.h"
74 #endif
75 #ifdef TARGET_OS_FAMILY_windows
76 # include "jvm_windows.h"
77 #endif
78 #ifdef TARGET_OS_FAMILY_bsd
79 # include "jvm_bsd.h"
80 #endif
82 #include <errno.h>
84 #ifndef USDT2
85 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long);
86 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int);
87 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield);
88 #endif /* !USDT2 */
90 /*
91 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
92 such ctors and calls MUST NOT come between an oop declaration/init and its
93 usage because if objects are move this may cause various memory stomps, bus
94 errors and segfaults. Here is a cookbook for causing so called "naked oop
95 failures":
97 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
98 JVMWrapper("JVM_GetClassDeclaredFields");
100 // Object address to be held directly in mirror & not visible to GC
101 oop mirror = JNIHandles::resolve_non_null(ofClass);
103 // If this ctor can hit a safepoint, moving objects around, then
104 ComplexConstructor foo;
106 // Boom! mirror may point to JUNK instead of the intended object
107 (some dereference of mirror)
109 // Here's another call that may block for GC, making mirror stale
110 MutexLocker ml(some_lock);
112 // And here's an initializer that can result in a stale oop
113 // all in one step.
114 oop o = call_that_can_throw_exception(TRAPS);
117 The solution is to keep the oop declaration BELOW the ctor or function
118 call that might cause a GC, do another resolve to reassign the oop, or
119 consider use of a Handle instead of an oop so there is immunity from object
120 motion. But note that the "QUICK" entries below do not have a handlemark
121 and thus can only support use of handles passed in.
122 */
124 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
125 ResourceMark rm;
126 int line_number = -1;
127 const char * source_file = NULL;
128 const char * trace = "explicit";
129 InstanceKlass* caller = NULL;
130 JavaThread* jthread = JavaThread::current();
131 if (jthread->has_last_Java_frame()) {
132 vframeStream vfst(jthread);
134 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
135 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
136 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
137 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
138 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
140 Method* last_caller = NULL;
142 while (!vfst.at_end()) {
143 Method* m = vfst.method();
144 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
145 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
146 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
147 break;
148 }
149 last_caller = m;
150 vfst.next();
151 }
152 // if this is called from Class.forName0 and that is called from Class.forName,
153 // then print the caller of Class.forName. If this is Class.loadClass, then print
154 // that caller, otherwise keep quiet since this should be picked up elsewhere.
155 bool found_it = false;
156 if (!vfst.at_end() &&
157 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
158 vfst.method()->name() == vmSymbols::forName0_name()) {
159 vfst.next();
160 if (!vfst.at_end() &&
161 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
162 vfst.method()->name() == vmSymbols::forName_name()) {
163 vfst.next();
164 found_it = true;
165 }
166 } else if (last_caller != NULL &&
167 last_caller->method_holder()->name() ==
168 vmSymbols::java_lang_ClassLoader() &&
169 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
170 last_caller->name() == vmSymbols::loadClass_name())) {
171 found_it = true;
172 } else if (!vfst.at_end()) {
173 if (vfst.method()->is_native()) {
174 // JNI call
175 found_it = true;
176 }
177 }
178 if (found_it && !vfst.at_end()) {
179 // found the caller
180 caller = vfst.method()->method_holder();
181 line_number = vfst.method()->line_number_from_bci(vfst.bci());
182 if (line_number == -1) {
183 // show method name if it's a native method
184 trace = vfst.method()->name_and_sig_as_C_string();
185 }
186 Symbol* s = caller->source_file_name();
187 if (s != NULL) {
188 source_file = s->as_C_string();
189 }
190 }
191 }
192 if (caller != NULL) {
193 if (to_class != caller) {
194 const char * from = caller->external_name();
195 const char * to = to_class->external_name();
196 // print in a single call to reduce interleaving between threads
197 if (source_file != NULL) {
198 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
199 } else {
200 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
201 }
202 }
203 }
204 }
206 void trace_class_resolution(Klass* to_class) {
207 EXCEPTION_MARK;
208 trace_class_resolution_impl(to_class, THREAD);
209 if (HAS_PENDING_EXCEPTION) {
210 CLEAR_PENDING_EXCEPTION;
211 }
212 }
214 // Wrapper to trace JVM functions
216 #ifdef ASSERT
217 class JVMTraceWrapper : public StackObj {
218 public:
219 JVMTraceWrapper(const char* format, ...) {
220 if (TraceJVMCalls) {
221 va_list ap;
222 va_start(ap, format);
223 tty->print("JVM ");
224 tty->vprint_cr(format, ap);
225 va_end(ap);
226 }
227 }
228 };
230 Histogram* JVMHistogram;
231 volatile jint JVMHistogram_lock = 0;
233 class JVMHistogramElement : public HistogramElement {
234 public:
235 JVMHistogramElement(const char* name);
236 };
238 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
239 _name = elementName;
240 uintx count = 0;
242 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
243 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
244 count +=1;
245 if ( (WarnOnStalledSpinLock > 0)
246 && (count % WarnOnStalledSpinLock == 0)) {
247 warning("JVMHistogram_lock seems to be stalled");
248 }
249 }
250 }
252 if(JVMHistogram == NULL)
253 JVMHistogram = new Histogram("JVM Call Counts",100);
255 JVMHistogram->add_element(this);
256 Atomic::dec(&JVMHistogram_lock);
257 }
259 #define JVMCountWrapper(arg) \
260 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
261 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
263 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
264 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
265 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
266 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
267 #else
268 #define JVMWrapper(arg1)
269 #define JVMWrapper2(arg1, arg2)
270 #define JVMWrapper3(arg1, arg2, arg3)
271 #define JVMWrapper4(arg1, arg2, arg3, arg4)
272 #endif
275 // Interface version /////////////////////////////////////////////////////////////////////
278 JVM_LEAF(jint, JVM_GetInterfaceVersion())
279 return JVM_INTERFACE_VERSION;
280 JVM_END
283 // java.lang.System //////////////////////////////////////////////////////////////////////
286 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
287 JVMWrapper("JVM_CurrentTimeMillis");
288 return os::javaTimeMillis();
289 JVM_END
291 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
292 JVMWrapper("JVM_NanoTime");
293 return os::javaTimeNanos();
294 JVM_END
297 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
298 jobject dst, jint dst_pos, jint length))
299 JVMWrapper("JVM_ArrayCopy");
300 // Check if we have null pointers
301 if (src == NULL || dst == NULL) {
302 THROW(vmSymbols::java_lang_NullPointerException());
303 }
304 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
305 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
306 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
307 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
308 // Do copy
309 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
310 JVM_END
313 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
314 JavaValue r(T_OBJECT);
315 // public synchronized Object put(Object key, Object value);
316 HandleMark hm(THREAD);
317 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
318 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
319 JavaCalls::call_virtual(&r,
320 props,
321 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
322 vmSymbols::put_name(),
323 vmSymbols::object_object_object_signature(),
324 key_str,
325 value_str,
326 THREAD);
327 }
330 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
333 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
334 JVMWrapper("JVM_InitProperties");
335 ResourceMark rm;
337 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
339 // System property list includes both user set via -D option and
340 // jvm system specific properties.
341 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
342 PUTPROP(props, p->key(), p->value());
343 }
345 // Convert the -XX:MaxDirectMemorySize= command line flag
346 // to the sun.nio.MaxDirectMemorySize property.
347 // Do this after setting user properties to prevent people
348 // from setting the value with a -D option, as requested.
349 {
350 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
351 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
352 } else {
353 char as_chars[256];
354 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize);
355 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
356 }
357 }
359 // JVM monitoring and management support
360 // Add the sun.management.compiler property for the compiler's name
361 {
362 #undef CSIZE
363 #if defined(_LP64) || defined(_WIN64)
364 #define CSIZE "64-Bit "
365 #else
366 #define CSIZE
367 #endif // 64bit
369 #ifdef TIERED
370 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
371 #else
372 #if defined(COMPILER1)
373 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
374 #elif defined(COMPILER2)
375 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
376 #else
377 const char* compiler_name = "";
378 #endif // compilers
379 #endif // TIERED
381 if (*compiler_name != '\0' &&
382 (Arguments::mode() != Arguments::_int)) {
383 PUTPROP(props, "sun.management.compiler", compiler_name);
384 }
385 }
387 return properties;
388 JVM_END
391 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
393 extern volatile jint vm_created;
395 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
396 if (vm_created != 0 && (code == 0)) {
397 // The VM is about to exit. We call back into Java to check whether finalizers should be run
398 Universe::run_finalizers_on_exit();
399 }
400 before_exit(thread);
401 vm_exit(code);
402 JVM_END
405 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
406 before_exit(thread);
407 vm_exit(code);
408 JVM_END
411 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
412 register_on_exit_function(func);
413 JVM_END
416 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
417 JVMWrapper("JVM_GC");
418 if (!DisableExplicitGC) {
419 Universe::heap()->collect(GCCause::_java_lang_system_gc);
420 }
421 JVM_END
424 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
425 JVMWrapper("JVM_MaxObjectInspectionAge");
426 return Universe::heap()->millis_since_last_gc();
427 JVM_END
430 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
431 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
432 JVM_END
435 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
436 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
437 JVM_END
439 static inline jlong convert_size_t_to_jlong(size_t val) {
440 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
441 NOT_LP64 (return (jlong)val;)
442 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
443 }
445 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
446 JVMWrapper("JVM_TotalMemory");
447 size_t n = Universe::heap()->capacity();
448 return convert_size_t_to_jlong(n);
449 JVM_END
452 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
453 JVMWrapper("JVM_FreeMemory");
454 CollectedHeap* ch = Universe::heap();
455 size_t n;
456 {
457 MutexLocker x(Heap_lock);
458 n = ch->capacity() - ch->used();
459 }
460 return convert_size_t_to_jlong(n);
461 JVM_END
464 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
465 JVMWrapper("JVM_MaxMemory");
466 size_t n = Universe::heap()->max_capacity();
467 return convert_size_t_to_jlong(n);
468 JVM_END
471 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
472 JVMWrapper("JVM_ActiveProcessorCount");
473 return os::active_processor_count();
474 JVM_END
478 // java.lang.Throwable //////////////////////////////////////////////////////
481 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
482 JVMWrapper("JVM_FillInStackTrace");
483 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
484 java_lang_Throwable::fill_in_stack_trace(exception);
485 JVM_END
488 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
489 JVMWrapper("JVM_GetStackTraceDepth");
490 oop exception = JNIHandles::resolve(throwable);
491 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
492 JVM_END
495 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
496 JVMWrapper("JVM_GetStackTraceElement");
497 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
498 oop exception = JNIHandles::resolve(throwable);
499 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
500 return JNIHandles::make_local(env, element);
501 JVM_END
504 // java.lang.Object ///////////////////////////////////////////////
507 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
508 JVMWrapper("JVM_IHashCode");
509 // as implemented in the classic virtual machine; return 0 if object is NULL
510 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
511 JVM_END
514 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
515 JVMWrapper("JVM_MonitorWait");
516 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
517 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
518 if (JvmtiExport::should_post_monitor_wait()) {
519 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
520 }
521 ObjectSynchronizer::wait(obj, ms, CHECK);
522 JVM_END
525 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
526 JVMWrapper("JVM_MonitorNotify");
527 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
528 ObjectSynchronizer::notify(obj, CHECK);
529 JVM_END
532 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
533 JVMWrapper("JVM_MonitorNotifyAll");
534 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
535 ObjectSynchronizer::notifyall(obj, CHECK);
536 JVM_END
539 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
540 JVMWrapper("JVM_Clone");
541 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
542 const KlassHandle klass (THREAD, obj->klass());
543 JvmtiVMObjectAllocEventCollector oam;
545 #ifdef ASSERT
546 // Just checking that the cloneable flag is set correct
547 if (obj->is_array()) {
548 guarantee(klass->is_cloneable(), "all arrays are cloneable");
549 } else {
550 guarantee(obj->is_instance(), "should be instanceOop");
551 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
552 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
553 }
554 #endif
556 // Check if class of obj supports the Cloneable interface.
557 // All arrays are considered to be cloneable (See JLS 20.1.5)
558 if (!klass->is_cloneable()) {
559 ResourceMark rm(THREAD);
560 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
561 }
563 // Make shallow object copy
564 const int size = obj->size();
565 oop new_obj = NULL;
566 if (obj->is_array()) {
567 const int length = ((arrayOop)obj())->length();
568 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
569 } else {
570 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
571 }
572 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
573 // is modifying a reference field in the clonee, a non-oop-atomic copy might
574 // be suspended in the middle of copying the pointer and end up with parts
575 // of two different pointers in the field. Subsequent dereferences will crash.
576 // 4846409: an oop-copy of objects with long or double fields or arrays of same
577 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
578 // of oops. We know objects are aligned on a minimum of an jlong boundary.
579 // The same is true of StubRoutines::object_copy and the various oop_copy
580 // variants, and of the code generated by the inline_native_clone intrinsic.
581 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
582 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
583 (size_t)align_object_size(size) / HeapWordsPerLong);
584 // Clear the header
585 new_obj->init_mark();
587 // Store check (mark entire object and let gc sort it out)
588 BarrierSet* bs = Universe::heap()->barrier_set();
589 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
590 bs->write_region(MemRegion((HeapWord*)new_obj, size));
592 // Caution: this involves a java upcall, so the clone should be
593 // "gc-robust" by this stage.
594 if (klass->has_finalizer()) {
595 assert(obj->is_instance(), "should be instanceOop");
596 new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
597 }
599 return JNIHandles::make_local(env, oop(new_obj));
600 JVM_END
602 // java.lang.Compiler ////////////////////////////////////////////////////
604 // The initial cuts of the HotSpot VM will not support JITs, and all existing
605 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
606 // functions are all silently ignored unless JVM warnings are printed.
608 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
609 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
610 JVM_END
613 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
614 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
615 return JNI_FALSE;
616 JVM_END
619 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
620 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
621 return JNI_FALSE;
622 JVM_END
625 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
626 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
627 return JNI_FALSE;
628 JVM_END
631 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
632 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
633 return NULL;
634 JVM_END
637 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
638 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
639 JVM_END
642 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
643 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
644 JVM_END
648 // Error message support //////////////////////////////////////////////////////
650 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
651 JVMWrapper("JVM_GetLastErrorString");
652 return (jint)os::lasterror(buf, len);
653 JVM_END
656 // java.io.File ///////////////////////////////////////////////////////////////
658 JVM_LEAF(char*, JVM_NativePath(char* path))
659 JVMWrapper2("JVM_NativePath (%s)", path);
660 return os::native_path(path);
661 JVM_END
664 // Misc. class handling ///////////////////////////////////////////////////////////
667 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
668 JVMWrapper("JVM_GetCallerClass");
670 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation.
671 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL) {
672 Klass* k = thread->security_get_caller_class(depth);
673 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
674 } else {
675 // Basic handshaking with Java_sun_reflect_Reflection_getCallerClass
676 assert(depth == -1, "wrong handshake depth");
677 }
679 // Getting the class of the caller frame.
680 //
681 // The call stack at this point looks something like this:
682 //
683 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
684 // [1] [ @CallerSensitive API.method ]
685 // [.] [ (skipped intermediate frames) ]
686 // [n] [ caller ]
687 vframeStream vfst(thread);
688 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
689 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
690 Method* m = vfst.method();
691 assert(m != NULL, "sanity");
692 switch (n) {
693 case 0:
694 // This must only be called from Reflection.getCallerClass
695 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
696 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
697 }
698 // fall-through
699 case 1:
700 // Frame 0 and 1 must be caller sensitive.
701 if (!m->caller_sensitive()) {
702 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
703 }
704 break;
705 default:
706 if (!m->is_ignored_by_security_stack_walk()) {
707 // We have reached the desired frame; return the holder class.
708 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
709 }
710 break;
711 }
712 }
713 return NULL;
714 JVM_END
717 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
718 JVMWrapper("JVM_FindPrimitiveClass");
719 oop mirror = NULL;
720 BasicType t = name2type(utf);
721 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
722 mirror = Universe::java_mirror(t);
723 }
724 if (mirror == NULL) {
725 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
726 } else {
727 return (jclass) JNIHandles::make_local(env, mirror);
728 }
729 JVM_END
732 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
733 JVMWrapper("JVM_ResolveClass");
734 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
735 JVM_END
738 // Returns a class loaded by the bootstrap class loader; or null
739 // if not found. ClassNotFoundException is not thrown.
740 //
741 // Rationale behind JVM_FindClassFromBootLoader
742 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
743 // b> because of (a) java.dll has a direct dependecy on the unexported
744 // private symbol "_JVM_FindClassFromClassLoader@20".
745 // c> the launcher cannot use the private symbol as it dynamically opens
746 // the entry point, so if something changes, the launcher will fail
747 // unexpectedly at runtime, it is safest for the launcher to dlopen a
748 // stable exported interface.
749 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
750 // signature to change from _JVM_FindClassFromClassLoader@20 to
751 // JVM_FindClassFromClassLoader and will not be backward compatible
752 // with older JDKs.
753 // Thus a public/stable exported entry point is the right solution,
754 // public here means public in linker semantics, and is exported only
755 // to the JDK, and is not intended to be a public API.
757 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
758 const char* name))
759 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
761 // Java libraries should ensure that name is never null...
762 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
763 // It's impossible to create this class; the name cannot fit
764 // into the constant pool.
765 return NULL;
766 }
768 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
769 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
770 if (k == NULL) {
771 return NULL;
772 }
774 if (TraceClassResolution) {
775 trace_class_resolution(k);
776 }
777 return (jclass) JNIHandles::make_local(env, k->java_mirror());
778 JVM_END
780 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
781 jboolean init, jobject loader,
782 jboolean throwError))
783 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
784 throwError ? "error" : "exception");
785 // Java libraries should ensure that name is never null...
786 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
787 // It's impossible to create this class; the name cannot fit
788 // into the constant pool.
789 if (throwError) {
790 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
791 } else {
792 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
793 }
794 }
795 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
796 Handle h_loader(THREAD, JNIHandles::resolve(loader));
797 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
798 Handle(), throwError, THREAD);
800 if (TraceClassResolution && result != NULL) {
801 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
802 }
803 return result;
804 JVM_END
807 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
808 jboolean init, jclass from))
809 JVMWrapper2("JVM_FindClassFromClass %s", name);
810 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
811 // It's impossible to create this class; the name cannot fit
812 // into the constant pool.
813 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
814 }
815 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
816 oop from_class_oop = JNIHandles::resolve(from);
817 Klass* from_class = (from_class_oop == NULL)
818 ? (Klass*)NULL
819 : java_lang_Class::as_Klass(from_class_oop);
820 oop class_loader = NULL;
821 oop protection_domain = NULL;
822 if (from_class != NULL) {
823 class_loader = from_class->class_loader();
824 protection_domain = from_class->protection_domain();
825 }
826 Handle h_loader(THREAD, class_loader);
827 Handle h_prot (THREAD, protection_domain);
828 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
829 h_prot, true, thread);
831 if (TraceClassResolution && result != NULL) {
832 // this function is generally only used for class loading during verification.
833 ResourceMark rm;
834 oop from_mirror = JNIHandles::resolve_non_null(from);
835 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
836 const char * from_name = from_class->external_name();
838 oop mirror = JNIHandles::resolve_non_null(result);
839 Klass* to_class = java_lang_Class::as_Klass(mirror);
840 const char * to = to_class->external_name();
841 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
842 }
844 return result;
845 JVM_END
847 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
848 if (loader.is_null()) {
849 return;
850 }
852 // check whether the current caller thread holds the lock or not.
853 // If not, increment the corresponding counter
854 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
855 ObjectSynchronizer::owner_self) {
856 counter->inc();
857 }
858 }
860 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
861 // and JVM_DefineClassWithSourceCond()
862 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
863 jobject loader, const jbyte *buf,
864 jsize len, jobject pd, const char *source,
865 jboolean verify, TRAPS) {
866 if (source == NULL) source = "__JVM_DefineClass__";
868 assert(THREAD->is_Java_thread(), "must be a JavaThread");
869 JavaThread* jt = (JavaThread*) THREAD;
871 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
872 ClassLoader::perf_define_appclass_selftime(),
873 ClassLoader::perf_define_appclasses(),
874 jt->get_thread_stat()->perf_recursion_counts_addr(),
875 jt->get_thread_stat()->perf_timers_addr(),
876 PerfClassTraceTime::DEFINE_CLASS);
878 if (UsePerfData) {
879 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
880 }
882 // Since exceptions can be thrown, class initialization can take place
883 // if name is NULL no check for class name in .class stream has to be made.
884 TempNewSymbol class_name = NULL;
885 if (name != NULL) {
886 const int str_len = (int)strlen(name);
887 if (str_len > Symbol::max_length()) {
888 // It's impossible to create this class; the name cannot fit
889 // into the constant pool.
890 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
891 }
892 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
893 }
895 ResourceMark rm(THREAD);
896 ClassFileStream st((u1*) buf, len, (char *)source);
897 Handle class_loader (THREAD, JNIHandles::resolve(loader));
898 if (UsePerfData) {
899 is_lock_held_by_thread(class_loader,
900 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
901 THREAD);
902 }
903 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
904 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
905 protection_domain, &st,
906 verify != 0,
907 CHECK_NULL);
909 if (TraceClassResolution && k != NULL) {
910 trace_class_resolution(k);
911 }
913 return (jclass) JNIHandles::make_local(env, k->java_mirror());
914 }
917 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
918 JVMWrapper2("JVM_DefineClass %s", name);
920 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
921 JVM_END
924 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
925 JVMWrapper2("JVM_DefineClassWithSource %s", name);
927 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
928 JVM_END
930 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
931 jobject loader, const jbyte *buf,
932 jsize len, jobject pd,
933 const char *source, jboolean verify))
934 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
936 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
937 JVM_END
939 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
940 JVMWrapper("JVM_FindLoadedClass");
941 ResourceMark rm(THREAD);
943 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
944 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
946 const char* str = java_lang_String::as_utf8_string(string());
947 // Sanity check, don't expect null
948 if (str == NULL) return NULL;
950 const int str_len = (int)strlen(str);
951 if (str_len > Symbol::max_length()) {
952 // It's impossible to create this class; the name cannot fit
953 // into the constant pool.
954 return NULL;
955 }
956 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
958 // Security Note:
959 // The Java level wrapper will perform the necessary security check allowing
960 // us to pass the NULL as the initiating class loader.
961 Handle h_loader(THREAD, JNIHandles::resolve(loader));
962 if (UsePerfData) {
963 is_lock_held_by_thread(h_loader,
964 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
965 THREAD);
966 }
968 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
969 h_loader,
970 Handle(),
971 CHECK_NULL);
973 return (k == NULL) ? NULL :
974 (jclass) JNIHandles::make_local(env, k->java_mirror());
975 JVM_END
978 // Reflection support //////////////////////////////////////////////////////////////////////////////
980 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
981 assert (cls != NULL, "illegal class");
982 JVMWrapper("JVM_GetClassName");
983 JvmtiVMObjectAllocEventCollector oam;
984 ResourceMark rm(THREAD);
985 const char* name;
986 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
987 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
988 } else {
989 // Consider caching interned string in Klass
990 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
991 assert(k->is_klass(), "just checking");
992 name = k->external_name();
993 }
994 oop result = StringTable::intern((char*) name, CHECK_NULL);
995 return (jstring) JNIHandles::make_local(env, result);
996 JVM_END
999 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1000 JVMWrapper("JVM_GetClassInterfaces");
1001 JvmtiVMObjectAllocEventCollector oam;
1002 oop mirror = JNIHandles::resolve_non_null(cls);
1004 // Special handling for primitive objects
1005 if (java_lang_Class::is_primitive(mirror)) {
1006 // Primitive objects does not have any interfaces
1007 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1008 return (jobjectArray) JNIHandles::make_local(env, r);
1009 }
1011 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
1012 // Figure size of result array
1013 int size;
1014 if (klass->oop_is_instance()) {
1015 size = InstanceKlass::cast(klass())->local_interfaces()->length();
1016 } else {
1017 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
1018 size = 2;
1019 }
1021 // Allocate result array
1022 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1023 objArrayHandle result (THREAD, r);
1024 // Fill in result
1025 if (klass->oop_is_instance()) {
1026 // Regular instance klass, fill in all local interfaces
1027 for (int index = 0; index < size; index++) {
1028 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
1029 result->obj_at_put(index, k->java_mirror());
1030 }
1031 } else {
1032 // All arrays implement java.lang.Cloneable and java.io.Serializable
1033 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1034 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1035 }
1036 return (jobjectArray) JNIHandles::make_local(env, result());
1037 JVM_END
1040 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
1041 JVMWrapper("JVM_GetClassLoader");
1042 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1043 return NULL;
1044 }
1045 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1046 oop loader = k->class_loader();
1047 return JNIHandles::make_local(env, loader);
1048 JVM_END
1051 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1052 JVMWrapper("JVM_IsInterface");
1053 oop mirror = JNIHandles::resolve_non_null(cls);
1054 if (java_lang_Class::is_primitive(mirror)) {
1055 return JNI_FALSE;
1056 }
1057 Klass* k = java_lang_Class::as_Klass(mirror);
1058 jboolean result = k->is_interface();
1059 assert(!result || k->oop_is_instance(),
1060 "all interfaces are instance types");
1061 // The compiler intrinsic for isInterface tests the
1062 // Klass::_access_flags bits in the same way.
1063 return result;
1064 JVM_END
1067 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1068 JVMWrapper("JVM_GetClassSigners");
1069 JvmtiVMObjectAllocEventCollector oam;
1070 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1071 // There are no signers for primitive types
1072 return NULL;
1073 }
1075 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1076 objArrayOop signers = NULL;
1077 if (k->oop_is_instance()) {
1078 signers = InstanceKlass::cast(k)->signers();
1079 }
1081 // If there are no signers set in the class, or if the class
1082 // is an array, return NULL.
1083 if (signers == NULL) return NULL;
1085 // copy of the signers array
1086 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1087 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1088 for (int index = 0; index < signers->length(); index++) {
1089 signers_copy->obj_at_put(index, signers->obj_at(index));
1090 }
1092 // return the copy
1093 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1094 JVM_END
1097 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1098 JVMWrapper("JVM_SetClassSigners");
1099 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1100 // This call is ignored for primitive types and arrays.
1101 // Signers are only set once, ClassLoader.java, and thus shouldn't
1102 // be called with an array. Only the bootstrap loader creates arrays.
1103 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1104 if (k->oop_is_instance()) {
1105 InstanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers)));
1106 }
1107 }
1108 JVM_END
1111 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1112 JVMWrapper("JVM_GetProtectionDomain");
1113 if (JNIHandles::resolve(cls) == NULL) {
1114 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1115 }
1117 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1118 // Primitive types does not have a protection domain.
1119 return NULL;
1120 }
1122 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1123 return (jobject) JNIHandles::make_local(env, k->protection_domain());
1124 JVM_END
1127 // Obsolete since 1.2 (Class.setProtectionDomain removed), although
1128 // still defined in core libraries as of 1.5.
1129 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain))
1130 JVMWrapper("JVM_SetProtectionDomain");
1131 if (JNIHandles::resolve(cls) == NULL) {
1132 THROW(vmSymbols::java_lang_NullPointerException());
1133 }
1134 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1135 // Call is ignored for primitive types
1136 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1138 // cls won't be an array, as this called only from ClassLoader.defineClass
1139 if (k->oop_is_instance()) {
1140 oop pd = JNIHandles::resolve(protection_domain);
1141 assert(pd == NULL || pd->is_oop(), "just checking");
1142 InstanceKlass::cast(k)->set_protection_domain(pd);
1143 }
1144 }
1145 JVM_END
1147 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1148 // If there is a security manager and protection domain, check the access
1149 // in the protection domain, otherwise it is authorized.
1150 if (java_lang_System::has_security_manager()) {
1152 // For bootstrapping, if pd implies method isn't in the JDK, allow
1153 // this context to revert to older behavior.
1154 // In this case the isAuthorized field in AccessControlContext is also not
1155 // present.
1156 if (Universe::protection_domain_implies_method() == NULL) {
1157 return true;
1158 }
1160 // Whitelist certain access control contexts
1161 if (java_security_AccessControlContext::is_authorized(context)) {
1162 return true;
1163 }
1165 oop prot = klass->protection_domain();
1166 if (prot != NULL) {
1167 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1168 // in the new wrapper.
1169 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1170 Handle h_prot(THREAD, prot);
1171 JavaValue result(T_BOOLEAN);
1172 JavaCallArguments args(h_prot);
1173 JavaCalls::call(&result, m, &args, CHECK_false);
1174 return (result.get_jboolean() != 0);
1175 }
1176 }
1177 return true;
1178 }
1180 // Create an AccessControlContext with a protection domain with null codesource
1181 // and null permissions - which gives no permissions.
1182 oop create_dummy_access_control_context(TRAPS) {
1183 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass());
1184 // new ProtectionDomain(null,null);
1185 oop null_protection_domain = pd_klass->allocate_instance(CHECK_NULL);
1186 Handle null_pd(THREAD, null_protection_domain);
1188 // new ProtectionDomain[] {pd};
1189 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1190 context->obj_at_put(0, null_pd());
1192 // new AccessControlContext(new ProtectionDomain[] {pd})
1193 objArrayHandle h_context(THREAD, context);
1194 oop result = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1195 return result;
1196 }
1198 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1199 JVMWrapper("JVM_DoPrivileged");
1201 if (action == NULL) {
1202 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1203 }
1205 // Compute the frame initiating the do privileged operation and setup the privileged stack
1206 vframeStream vfst(thread);
1207 vfst.security_get_caller_frame(1);
1209 if (vfst.at_end()) {
1210 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1211 }
1213 Method* method = vfst.method();
1214 instanceKlassHandle klass (THREAD, method->method_holder());
1216 // Check that action object understands "Object run()"
1217 Handle h_context;
1218 if (context != NULL) {
1219 h_context = Handle(THREAD, JNIHandles::resolve(context));
1220 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1221 if (!authorized) {
1222 // Create an unprivileged access control object and call it's run function
1223 // instead.
1224 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1225 h_context = Handle(THREAD, noprivs);
1226 }
1227 }
1229 // Check that action object understands "Object run()"
1230 Handle object (THREAD, JNIHandles::resolve(action));
1232 // get run() method
1233 Method* m_oop = object->klass()->uncached_lookup_method(
1234 vmSymbols::run_method_name(),
1235 vmSymbols::void_object_signature());
1236 methodHandle m (THREAD, m_oop);
1237 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1238 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1239 }
1241 // Stack allocated list of privileged stack elements
1242 PrivilegedElement pi;
1243 if (!vfst.at_end()) {
1244 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1245 thread->set_privileged_stack_top(&pi);
1246 }
1249 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1250 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1251 Handle pending_exception;
1252 JavaValue result(T_OBJECT);
1253 JavaCallArguments args(object);
1254 JavaCalls::call(&result, m, &args, THREAD);
1256 // done with action, remove ourselves from the list
1257 if (!vfst.at_end()) {
1258 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1259 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1260 }
1262 if (HAS_PENDING_EXCEPTION) {
1263 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1264 CLEAR_PENDING_EXCEPTION;
1266 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1267 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1268 // Throw a java.security.PrivilegedActionException(Exception e) exception
1269 JavaCallArguments args(pending_exception);
1270 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1271 vmSymbols::exception_void_signature(),
1272 &args);
1273 }
1274 }
1276 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1277 return JNIHandles::make_local(env, (oop) result.get_jobject());
1278 JVM_END
1281 // Returns the inherited_access_control_context field of the running thread.
1282 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1283 JVMWrapper("JVM_GetInheritedAccessControlContext");
1284 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1285 return JNIHandles::make_local(env, result);
1286 JVM_END
1288 class RegisterArrayForGC {
1289 private:
1290 JavaThread *_thread;
1291 public:
1292 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1293 _thread = thread;
1294 _thread->register_array_for_gc(array);
1295 }
1297 ~RegisterArrayForGC() {
1298 _thread->register_array_for_gc(NULL);
1299 }
1300 };
1303 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1304 JVMWrapper("JVM_GetStackAccessControlContext");
1305 if (!UsePrivilegedStack) return NULL;
1307 ResourceMark rm(THREAD);
1308 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1309 JvmtiVMObjectAllocEventCollector oam;
1311 // count the protection domains on the execution stack. We collapse
1312 // duplicate consecutive protection domains into a single one, as
1313 // well as stopping when we hit a privileged frame.
1315 // Use vframeStream to iterate through Java frames
1316 vframeStream vfst(thread);
1318 oop previous_protection_domain = NULL;
1319 Handle privileged_context(thread, NULL);
1320 bool is_privileged = false;
1321 oop protection_domain = NULL;
1323 for(; !vfst.at_end(); vfst.next()) {
1324 // get method of frame
1325 Method* method = vfst.method();
1326 intptr_t* frame_id = vfst.frame_id();
1328 // check the privileged frames to see if we have a match
1329 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1330 // this frame is privileged
1331 is_privileged = true;
1332 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1333 protection_domain = thread->privileged_stack_top()->protection_domain();
1334 } else {
1335 protection_domain = method->method_holder()->protection_domain();
1336 }
1338 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1339 local_array->push(protection_domain);
1340 previous_protection_domain = protection_domain;
1341 }
1343 if (is_privileged) break;
1344 }
1347 // either all the domains on the stack were system domains, or
1348 // we had a privileged system domain
1349 if (local_array->is_empty()) {
1350 if (is_privileged && privileged_context.is_null()) return NULL;
1352 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1353 return JNIHandles::make_local(env, result);
1354 }
1356 // the resource area must be registered in case of a gc
1357 RegisterArrayForGC ragc(thread, local_array);
1358 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1359 local_array->length(), CHECK_NULL);
1360 objArrayHandle h_context(thread, context);
1361 for (int index = 0; index < local_array->length(); index++) {
1362 h_context->obj_at_put(index, local_array->at(index));
1363 }
1365 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1367 return JNIHandles::make_local(env, result);
1368 JVM_END
1371 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1372 JVMWrapper("JVM_IsArrayClass");
1373 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1374 return (k != NULL) && k->oop_is_array() ? true : false;
1375 JVM_END
1378 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1379 JVMWrapper("JVM_IsPrimitiveClass");
1380 oop mirror = JNIHandles::resolve_non_null(cls);
1381 return (jboolean) java_lang_Class::is_primitive(mirror);
1382 JVM_END
1385 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1386 JVMWrapper("JVM_GetComponentType");
1387 oop mirror = JNIHandles::resolve_non_null(cls);
1388 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1389 return (jclass) JNIHandles::make_local(env, result);
1390 JVM_END
1393 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1394 JVMWrapper("JVM_GetClassModifiers");
1395 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1396 // Primitive type
1397 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1398 }
1400 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1401 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1402 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1403 return k->modifier_flags();
1404 JVM_END
1407 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1409 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1410 JvmtiVMObjectAllocEventCollector oam;
1411 // ofClass is a reference to a java_lang_Class object. The mirror object
1412 // of an InstanceKlass
1414 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1415 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1416 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1417 return (jobjectArray)JNIHandles::make_local(env, result);
1418 }
1420 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1421 InnerClassesIterator iter(k);
1423 if (iter.length() == 0) {
1424 // Neither an inner nor outer class
1425 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1426 return (jobjectArray)JNIHandles::make_local(env, result);
1427 }
1429 // find inner class info
1430 constantPoolHandle cp(thread, k->constants());
1431 int length = iter.length();
1433 // Allocate temp. result array
1434 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1435 objArrayHandle result (THREAD, r);
1436 int members = 0;
1438 for (; !iter.done(); iter.next()) {
1439 int ioff = iter.inner_class_info_index();
1440 int ooff = iter.outer_class_info_index();
1442 if (ioff != 0 && ooff != 0) {
1443 // Check to see if the name matches the class we're looking for
1444 // before attempting to find the class.
1445 if (cp->klass_name_at_matches(k, ooff)) {
1446 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1447 if (outer_klass == k()) {
1448 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1449 instanceKlassHandle inner_klass (THREAD, ik);
1451 // Throws an exception if outer klass has not declared k as
1452 // an inner klass
1453 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1455 result->obj_at_put(members, inner_klass->java_mirror());
1456 members++;
1457 }
1458 }
1459 }
1460 }
1462 if (members != length) {
1463 // Return array of right length
1464 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1465 for(int i = 0; i < members; i++) {
1466 res->obj_at_put(i, result->obj_at(i));
1467 }
1468 return (jobjectArray)JNIHandles::make_local(env, res);
1469 }
1471 return (jobjectArray)JNIHandles::make_local(env, result());
1472 JVM_END
1475 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1476 {
1477 // ofClass is a reference to a java_lang_Class object.
1478 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1479 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1480 return NULL;
1481 }
1483 bool inner_is_member = false;
1484 Klass* outer_klass
1485 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1486 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1487 if (outer_klass == NULL) return NULL; // already a top-level class
1488 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1489 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1490 }
1491 JVM_END
1493 // should be in InstanceKlass.cpp, but is here for historical reasons
1494 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1495 bool* inner_is_member,
1496 TRAPS) {
1497 Thread* thread = THREAD;
1498 InnerClassesIterator iter(k);
1499 if (iter.length() == 0) {
1500 // No inner class info => no declaring class
1501 return NULL;
1502 }
1504 constantPoolHandle i_cp(thread, k->constants());
1506 bool found = false;
1507 Klass* ok;
1508 instanceKlassHandle outer_klass;
1509 *inner_is_member = false;
1511 // Find inner_klass attribute
1512 for (; !iter.done() && !found; iter.next()) {
1513 int ioff = iter.inner_class_info_index();
1514 int ooff = iter.outer_class_info_index();
1515 int noff = iter.inner_name_index();
1516 if (ioff != 0) {
1517 // Check to see if the name matches the class we're looking for
1518 // before attempting to find the class.
1519 if (i_cp->klass_name_at_matches(k, ioff)) {
1520 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1521 found = (k() == inner_klass);
1522 if (found && ooff != 0) {
1523 ok = i_cp->klass_at(ooff, CHECK_NULL);
1524 outer_klass = instanceKlassHandle(thread, ok);
1525 *inner_is_member = true;
1526 }
1527 }
1528 }
1529 }
1531 if (found && outer_klass.is_null()) {
1532 // It may be anonymous; try for that.
1533 int encl_method_class_idx = k->enclosing_method_class_index();
1534 if (encl_method_class_idx != 0) {
1535 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1536 outer_klass = instanceKlassHandle(thread, ok);
1537 *inner_is_member = false;
1538 }
1539 }
1541 // If no inner class attribute found for this class.
1542 if (outer_klass.is_null()) return NULL;
1544 // Throws an exception if outer klass has not declared k as an inner klass
1545 // We need evidence that each klass knows about the other, or else
1546 // the system could allow a spoof of an inner class to gain access rights.
1547 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1548 return outer_klass();
1549 }
1551 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1552 assert (cls != NULL, "illegal class");
1553 JVMWrapper("JVM_GetClassSignature");
1554 JvmtiVMObjectAllocEventCollector oam;
1555 ResourceMark rm(THREAD);
1556 // Return null for arrays and primatives
1557 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1558 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1559 if (k->oop_is_instance()) {
1560 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1561 if (sym == NULL) return NULL;
1562 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1563 return (jstring) JNIHandles::make_local(env, str());
1564 }
1565 }
1566 return NULL;
1567 JVM_END
1570 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1571 assert (cls != NULL, "illegal class");
1572 JVMWrapper("JVM_GetClassAnnotations");
1574 // Return null for arrays and primitives
1575 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1576 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1577 if (k->oop_is_instance()) {
1578 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1579 return (jbyteArray) JNIHandles::make_local(env, a);
1580 }
1581 }
1582 return NULL;
1583 JVM_END
1586 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1587 // some of this code was adapted from from jni_FromReflectedField
1589 oop reflected = JNIHandles::resolve_non_null(field);
1590 oop mirror = java_lang_reflect_Field::clazz(reflected);
1591 Klass* k = java_lang_Class::as_Klass(mirror);
1592 int slot = java_lang_reflect_Field::slot(reflected);
1593 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1595 KlassHandle kh(THREAD, k);
1596 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1598 if (modifiers & JVM_ACC_STATIC) {
1599 // for static fields we only look in the current class
1600 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1601 assert(false, "cannot find static field");
1602 return false;
1603 }
1604 } else {
1605 // for instance fields we start with the current class and work
1606 // our way up through the superclass chain
1607 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1608 assert(false, "cannot find instance field");
1609 return false;
1610 }
1611 }
1612 return true;
1613 }
1615 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1616 // field is a handle to a java.lang.reflect.Field object
1617 assert(field != NULL, "illegal field");
1618 JVMWrapper("JVM_GetFieldAnnotations");
1620 fieldDescriptor fd;
1621 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1622 if (!gotFd) {
1623 return NULL;
1624 }
1626 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1627 JVM_END
1630 static Method* jvm_get_method_common(jobject method) {
1631 // some of this code was adapted from from jni_FromReflectedMethod
1633 oop reflected = JNIHandles::resolve_non_null(method);
1634 oop mirror = NULL;
1635 int slot = 0;
1637 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1638 mirror = java_lang_reflect_Constructor::clazz(reflected);
1639 slot = java_lang_reflect_Constructor::slot(reflected);
1640 } else {
1641 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1642 "wrong type");
1643 mirror = java_lang_reflect_Method::clazz(reflected);
1644 slot = java_lang_reflect_Method::slot(reflected);
1645 }
1646 Klass* k = java_lang_Class::as_Klass(mirror);
1648 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1649 assert(m != NULL, "cannot find method");
1650 return m; // caller has to deal with NULL in product mode
1651 }
1654 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1655 JVMWrapper("JVM_GetMethodAnnotations");
1657 // method is a handle to a java.lang.reflect.Method object
1658 Method* m = jvm_get_method_common(method);
1659 if (m == NULL) {
1660 return NULL;
1661 }
1663 return (jbyteArray) JNIHandles::make_local(env,
1664 Annotations::make_java_array(m->annotations(), THREAD));
1665 JVM_END
1668 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1669 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1671 // method is a handle to a java.lang.reflect.Method object
1672 Method* m = jvm_get_method_common(method);
1673 if (m == NULL) {
1674 return NULL;
1675 }
1677 return (jbyteArray) JNIHandles::make_local(env,
1678 Annotations::make_java_array(m->annotation_default(), THREAD));
1679 JVM_END
1682 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1683 JVMWrapper("JVM_GetMethodParameterAnnotations");
1685 // method is a handle to a java.lang.reflect.Method object
1686 Method* m = jvm_get_method_common(method);
1687 if (m == NULL) {
1688 return NULL;
1689 }
1691 return (jbyteArray) JNIHandles::make_local(env,
1692 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1693 JVM_END
1695 /* Type use annotations support (JDK 1.8) */
1697 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1698 assert (cls != NULL, "illegal class");
1699 JVMWrapper("JVM_GetClassTypeAnnotations");
1700 ResourceMark rm(THREAD);
1701 // Return null for arrays and primitives
1702 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1703 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1704 if (k->oop_is_instance()) {
1705 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1706 if (type_annotations != NULL) {
1707 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1708 return (jbyteArray) JNIHandles::make_local(env, a);
1709 }
1710 }
1711 }
1712 return NULL;
1713 JVM_END
1715 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1716 assert (method != NULL, "illegal method");
1717 JVMWrapper("JVM_GetMethodTypeAnnotations");
1719 // method is a handle to a java.lang.reflect.Method object
1720 Method* m = jvm_get_method_common(method);
1721 if (m == NULL) {
1722 return NULL;
1723 }
1725 AnnotationArray* type_annotations = m->type_annotations();
1726 if (type_annotations != NULL) {
1727 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1728 return (jbyteArray) JNIHandles::make_local(env, a);
1729 }
1731 return NULL;
1732 JVM_END
1734 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1735 assert (field != NULL, "illegal field");
1736 JVMWrapper("JVM_GetFieldTypeAnnotations");
1738 fieldDescriptor fd;
1739 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1740 if (!gotFd) {
1741 return NULL;
1742 }
1744 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1745 JVM_END
1747 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1748 if (!cp->is_within_bounds(index)) {
1749 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1750 }
1751 }
1753 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1754 {
1755 JVMWrapper("JVM_GetMethodParameters");
1756 // method is a handle to a java.lang.reflect.Method object
1757 Method* method_ptr = jvm_get_method_common(method);
1758 methodHandle mh (THREAD, method_ptr);
1759 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1760 const int num_params = mh->method_parameters_length();
1762 if (0 != num_params) {
1763 // make sure all the symbols are properly formatted
1764 for (int i = 0; i < num_params; i++) {
1765 MethodParametersElement* params = mh->method_parameters_start();
1766 int index = params[i].name_cp_index;
1767 bounds_check(mh->constants(), index, CHECK_NULL);
1769 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1770 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1771 "Wrong type at constant pool index");
1772 }
1774 }
1776 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1777 objArrayHandle result (THREAD, result_oop);
1779 for (int i = 0; i < num_params; i++) {
1780 MethodParametersElement* params = mh->method_parameters_start();
1781 // For a 0 index, give a NULL symbol
1782 Symbol* sym = 0 != params[i].name_cp_index ?
1783 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1784 int flags = params[i].flags;
1785 oop param = Reflection::new_parameter(reflected_method, i, sym,
1786 flags, CHECK_NULL);
1787 result->obj_at_put(i, param);
1788 }
1789 return (jobjectArray)JNIHandles::make_local(env, result());
1790 } else {
1791 return (jobjectArray)NULL;
1792 }
1793 }
1794 JVM_END
1796 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1798 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1799 {
1800 JVMWrapper("JVM_GetClassDeclaredFields");
1801 JvmtiVMObjectAllocEventCollector oam;
1803 // Exclude primitive types and array types
1804 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1805 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1806 // Return empty array
1807 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1808 return (jobjectArray) JNIHandles::make_local(env, res);
1809 }
1811 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1812 constantPoolHandle cp(THREAD, k->constants());
1814 // Ensure class is linked
1815 k->link_class(CHECK_NULL);
1817 // 4496456 We need to filter out java.lang.Throwable.backtrace
1818 bool skip_backtrace = false;
1820 // Allocate result
1821 int num_fields;
1823 if (publicOnly) {
1824 num_fields = 0;
1825 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1826 if (fs.access_flags().is_public()) ++num_fields;
1827 }
1828 } else {
1829 num_fields = k->java_fields_count();
1831 if (k() == SystemDictionary::Throwable_klass()) {
1832 num_fields--;
1833 skip_backtrace = true;
1834 }
1835 }
1837 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1838 objArrayHandle result (THREAD, r);
1840 int out_idx = 0;
1841 fieldDescriptor fd;
1842 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1843 if (skip_backtrace) {
1844 // 4496456 skip java.lang.Throwable.backtrace
1845 int offset = fs.offset();
1846 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1847 }
1849 if (!publicOnly || fs.access_flags().is_public()) {
1850 fd.initialize(k(), fs.index());
1851 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1852 result->obj_at_put(out_idx, field);
1853 ++out_idx;
1854 }
1855 }
1856 assert(out_idx == num_fields, "just checking");
1857 return (jobjectArray) JNIHandles::make_local(env, result());
1858 }
1859 JVM_END
1861 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1862 {
1863 JVMWrapper("JVM_GetClassDeclaredMethods");
1864 JvmtiVMObjectAllocEventCollector oam;
1866 // Exclude primitive types and array types
1867 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1868 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1869 // Return empty array
1870 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL);
1871 return (jobjectArray) JNIHandles::make_local(env, res);
1872 }
1874 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1876 // Ensure class is linked
1877 k->link_class(CHECK_NULL);
1879 Array<Method*>* methods = k->methods();
1880 int methods_length = methods->length();
1881 int num_methods = 0;
1883 int i;
1884 for (i = 0; i < methods_length; i++) {
1885 methodHandle method(THREAD, methods->at(i));
1886 if (!method->is_initializer() && !method->is_overpass()) {
1887 if (!publicOnly || method->is_public()) {
1888 ++num_methods;
1889 }
1890 }
1891 }
1893 // Allocate result
1894 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL);
1895 objArrayHandle result (THREAD, r);
1897 int out_idx = 0;
1898 for (i = 0; i < methods_length; i++) {
1899 methodHandle method(THREAD, methods->at(i));
1900 if (!method->is_initializer() && !method->is_overpass()) {
1901 if (!publicOnly || method->is_public()) {
1902 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1903 result->obj_at_put(out_idx, m);
1904 ++out_idx;
1905 }
1906 }
1907 }
1908 assert(out_idx == num_methods, "just checking");
1909 return (jobjectArray) JNIHandles::make_local(env, result());
1910 }
1911 JVM_END
1913 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1914 {
1915 JVMWrapper("JVM_GetClassDeclaredConstructors");
1916 JvmtiVMObjectAllocEventCollector oam;
1918 // Exclude primitive types and array types
1919 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1920 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1921 // Return empty array
1922 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL);
1923 return (jobjectArray) JNIHandles::make_local(env, res);
1924 }
1926 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1928 // Ensure class is linked
1929 k->link_class(CHECK_NULL);
1931 Array<Method*>* methods = k->methods();
1932 int methods_length = methods->length();
1933 int num_constructors = 0;
1935 int i;
1936 for (i = 0; i < methods_length; i++) {
1937 methodHandle method(THREAD, methods->at(i));
1938 if (method->is_initializer() && !method->is_static()) {
1939 if (!publicOnly || method->is_public()) {
1940 ++num_constructors;
1941 }
1942 }
1943 }
1945 // Allocate result
1946 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL);
1947 objArrayHandle result(THREAD, r);
1949 int out_idx = 0;
1950 for (i = 0; i < methods_length; i++) {
1951 methodHandle method(THREAD, methods->at(i));
1952 if (method->is_initializer() && !method->is_static()) {
1953 if (!publicOnly || method->is_public()) {
1954 oop m = Reflection::new_constructor(method, CHECK_NULL);
1955 result->obj_at_put(out_idx, m);
1956 ++out_idx;
1957 }
1958 }
1959 }
1960 assert(out_idx == num_constructors, "just checking");
1961 return (jobjectArray) JNIHandles::make_local(env, result());
1962 }
1963 JVM_END
1965 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1966 {
1967 JVMWrapper("JVM_GetClassAccessFlags");
1968 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1969 // Primitive type
1970 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1971 }
1973 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1974 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1975 }
1976 JVM_END
1979 // Constant pool access //////////////////////////////////////////////////////////
1981 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1982 {
1983 JVMWrapper("JVM_GetClassConstantPool");
1984 JvmtiVMObjectAllocEventCollector oam;
1986 // Return null for primitives and arrays
1987 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1988 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1989 if (k->oop_is_instance()) {
1990 instanceKlassHandle k_h(THREAD, k);
1991 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1992 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1993 return JNIHandles::make_local(jcp());
1994 }
1995 }
1996 return NULL;
1997 }
1998 JVM_END
2001 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
2002 {
2003 JVMWrapper("JVM_ConstantPoolGetSize");
2004 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2005 return cp->length();
2006 }
2007 JVM_END
2010 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2011 {
2012 JVMWrapper("JVM_ConstantPoolGetClassAt");
2013 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2014 bounds_check(cp, index, CHECK_NULL);
2015 constantTag tag = cp->tag_at(index);
2016 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2017 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2018 }
2019 Klass* k = cp->klass_at(index, CHECK_NULL);
2020 return (jclass) JNIHandles::make_local(k->java_mirror());
2021 }
2022 JVM_END
2024 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2025 {
2026 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
2027 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2028 bounds_check(cp, index, CHECK_NULL);
2029 constantTag tag = cp->tag_at(index);
2030 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2031 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2032 }
2033 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2034 if (k == NULL) return NULL;
2035 return (jclass) JNIHandles::make_local(k->java_mirror());
2036 }
2037 JVM_END
2039 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2040 constantTag tag = cp->tag_at(index);
2041 if (!tag.is_method() && !tag.is_interface_method()) {
2042 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2043 }
2044 int klass_ref = cp->uncached_klass_ref_index_at(index);
2045 Klass* k_o;
2046 if (force_resolution) {
2047 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2048 } else {
2049 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2050 if (k_o == NULL) return NULL;
2051 }
2052 instanceKlassHandle k(THREAD, k_o);
2053 Symbol* name = cp->uncached_name_ref_at(index);
2054 Symbol* sig = cp->uncached_signature_ref_at(index);
2055 methodHandle m (THREAD, k->find_method(name, sig));
2056 if (m.is_null()) {
2057 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2058 }
2059 oop method;
2060 if (!m->is_initializer() || m->is_static()) {
2061 method = Reflection::new_method(m, true, true, CHECK_NULL);
2062 } else {
2063 method = Reflection::new_constructor(m, CHECK_NULL);
2064 }
2065 return JNIHandles::make_local(method);
2066 }
2068 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2069 {
2070 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2071 JvmtiVMObjectAllocEventCollector oam;
2072 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2073 bounds_check(cp, index, CHECK_NULL);
2074 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2075 return res;
2076 }
2077 JVM_END
2079 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2080 {
2081 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2082 JvmtiVMObjectAllocEventCollector oam;
2083 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2084 bounds_check(cp, index, CHECK_NULL);
2085 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2086 return res;
2087 }
2088 JVM_END
2090 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2091 constantTag tag = cp->tag_at(index);
2092 if (!tag.is_field()) {
2093 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2094 }
2095 int klass_ref = cp->uncached_klass_ref_index_at(index);
2096 Klass* k_o;
2097 if (force_resolution) {
2098 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2099 } else {
2100 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2101 if (k_o == NULL) return NULL;
2102 }
2103 instanceKlassHandle k(THREAD, k_o);
2104 Symbol* name = cp->uncached_name_ref_at(index);
2105 Symbol* sig = cp->uncached_signature_ref_at(index);
2106 fieldDescriptor fd;
2107 Klass* target_klass = k->find_field(name, sig, &fd);
2108 if (target_klass == NULL) {
2109 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2110 }
2111 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
2112 return JNIHandles::make_local(field);
2113 }
2115 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2116 {
2117 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2118 JvmtiVMObjectAllocEventCollector oam;
2119 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2120 bounds_check(cp, index, CHECK_NULL);
2121 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2122 return res;
2123 }
2124 JVM_END
2126 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2127 {
2128 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2129 JvmtiVMObjectAllocEventCollector oam;
2130 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2131 bounds_check(cp, index, CHECK_NULL);
2132 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2133 return res;
2134 }
2135 JVM_END
2137 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2138 {
2139 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2140 JvmtiVMObjectAllocEventCollector oam;
2141 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2142 bounds_check(cp, index, CHECK_NULL);
2143 constantTag tag = cp->tag_at(index);
2144 if (!tag.is_field_or_method()) {
2145 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2146 }
2147 int klass_ref = cp->uncached_klass_ref_index_at(index);
2148 Symbol* klass_name = cp->klass_name_at(klass_ref);
2149 Symbol* member_name = cp->uncached_name_ref_at(index);
2150 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2151 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2152 objArrayHandle dest(THREAD, dest_o);
2153 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2154 dest->obj_at_put(0, str());
2155 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2156 dest->obj_at_put(1, str());
2157 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2158 dest->obj_at_put(2, str());
2159 return (jobjectArray) JNIHandles::make_local(dest());
2160 }
2161 JVM_END
2163 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2164 {
2165 JVMWrapper("JVM_ConstantPoolGetIntAt");
2166 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2167 bounds_check(cp, index, CHECK_0);
2168 constantTag tag = cp->tag_at(index);
2169 if (!tag.is_int()) {
2170 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2171 }
2172 return cp->int_at(index);
2173 }
2174 JVM_END
2176 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2177 {
2178 JVMWrapper("JVM_ConstantPoolGetLongAt");
2179 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2180 bounds_check(cp, index, CHECK_(0L));
2181 constantTag tag = cp->tag_at(index);
2182 if (!tag.is_long()) {
2183 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2184 }
2185 return cp->long_at(index);
2186 }
2187 JVM_END
2189 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2190 {
2191 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2192 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2193 bounds_check(cp, index, CHECK_(0.0f));
2194 constantTag tag = cp->tag_at(index);
2195 if (!tag.is_float()) {
2196 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2197 }
2198 return cp->float_at(index);
2199 }
2200 JVM_END
2202 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2203 {
2204 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2205 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2206 bounds_check(cp, index, CHECK_(0.0));
2207 constantTag tag = cp->tag_at(index);
2208 if (!tag.is_double()) {
2209 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2210 }
2211 return cp->double_at(index);
2212 }
2213 JVM_END
2215 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2216 {
2217 JVMWrapper("JVM_ConstantPoolGetStringAt");
2218 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2219 bounds_check(cp, index, CHECK_NULL);
2220 constantTag tag = cp->tag_at(index);
2221 if (!tag.is_string()) {
2222 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2223 }
2224 oop str = cp->string_at(index, CHECK_NULL);
2225 return (jstring) JNIHandles::make_local(str);
2226 }
2227 JVM_END
2229 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2230 {
2231 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2232 JvmtiVMObjectAllocEventCollector oam;
2233 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2234 bounds_check(cp, index, CHECK_NULL);
2235 constantTag tag = cp->tag_at(index);
2236 if (!tag.is_symbol()) {
2237 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2238 }
2239 Symbol* sym = cp->symbol_at(index);
2240 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2241 return (jstring) JNIHandles::make_local(str());
2242 }
2243 JVM_END
2246 // Assertion support. //////////////////////////////////////////////////////////
2248 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2249 JVMWrapper("JVM_DesiredAssertionStatus");
2250 assert(cls != NULL, "bad class");
2252 oop r = JNIHandles::resolve(cls);
2253 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2254 if (java_lang_Class::is_primitive(r)) return false;
2256 Klass* k = java_lang_Class::as_Klass(r);
2257 assert(k->oop_is_instance(), "must be an instance klass");
2258 if (! k->oop_is_instance()) return false;
2260 ResourceMark rm(THREAD);
2261 const char* name = k->name()->as_C_string();
2262 bool system_class = k->class_loader() == NULL;
2263 return JavaAssertions::enabled(name, system_class);
2265 JVM_END
2268 // Return a new AssertionStatusDirectives object with the fields filled in with
2269 // command-line assertion arguments (i.e., -ea, -da).
2270 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2271 JVMWrapper("JVM_AssertionStatusDirectives");
2272 JvmtiVMObjectAllocEventCollector oam;
2273 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2274 return JNIHandles::make_local(env, asd);
2275 JVM_END
2277 // Verification ////////////////////////////////////////////////////////////////////////////////
2279 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2281 // RedefineClasses support: bug 6214132 caused verification to fail.
2282 // All functions from this section should call the jvmtiThreadSate function:
2283 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2284 // The function returns a Klass* of the _scratch_class if the verifier
2285 // was invoked in the middle of the class redefinition.
2286 // Otherwise it returns its argument value which is the _the_class Klass*.
2287 // Please, refer to the description in the jvmtiThreadSate.hpp.
2289 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2290 JVMWrapper("JVM_GetClassNameUTF");
2291 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2292 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2293 return k->name()->as_utf8();
2294 JVM_END
2297 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2298 JVMWrapper("JVM_GetClassCPTypes");
2299 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2300 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2301 // types will have length zero if this is not an InstanceKlass
2302 // (length is determined by call to JVM_GetClassCPEntriesCount)
2303 if (k->oop_is_instance()) {
2304 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2305 for (int index = cp->length() - 1; index >= 0; index--) {
2306 constantTag tag = cp->tag_at(index);
2307 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2308 }
2309 }
2310 JVM_END
2313 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2314 JVMWrapper("JVM_GetClassCPEntriesCount");
2315 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2316 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2317 if (!k->oop_is_instance())
2318 return 0;
2319 return InstanceKlass::cast(k)->constants()->length();
2320 JVM_END
2323 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2324 JVMWrapper("JVM_GetClassFieldsCount");
2325 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2326 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2327 if (!k->oop_is_instance())
2328 return 0;
2329 return InstanceKlass::cast(k)->java_fields_count();
2330 JVM_END
2333 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2334 JVMWrapper("JVM_GetClassMethodsCount");
2335 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2336 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2337 if (!k->oop_is_instance())
2338 return 0;
2339 return InstanceKlass::cast(k)->methods()->length();
2340 JVM_END
2343 // The following methods, used for the verifier, are never called with
2344 // array klasses, so a direct cast to InstanceKlass is safe.
2345 // Typically, these methods are called in a loop with bounds determined
2346 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2347 // zero for arrays.
2348 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2349 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2350 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2351 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2352 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2353 int length = method->checked_exceptions_length();
2354 if (length > 0) {
2355 CheckedExceptionElement* table= method->checked_exceptions_start();
2356 for (int i = 0; i < length; i++) {
2357 exceptions[i] = table[i].class_cp_index;
2358 }
2359 }
2360 JVM_END
2363 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2364 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2365 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2366 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2367 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2368 return method->checked_exceptions_length();
2369 JVM_END
2372 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2373 JVMWrapper("JVM_GetMethodIxByteCode");
2374 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2375 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2376 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2377 memcpy(code, method->code_base(), method->code_size());
2378 JVM_END
2381 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2382 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2383 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2384 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2385 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2386 return method->code_size();
2387 JVM_END
2390 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2391 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2392 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2393 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2394 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2395 ExceptionTable extable(method);
2396 entry->start_pc = extable.start_pc(entry_index);
2397 entry->end_pc = extable.end_pc(entry_index);
2398 entry->handler_pc = extable.handler_pc(entry_index);
2399 entry->catchType = extable.catch_type_index(entry_index);
2400 JVM_END
2403 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2404 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2405 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2406 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2407 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2408 return method->exception_table_length();
2409 JVM_END
2412 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2413 JVMWrapper("JVM_GetMethodIxModifiers");
2414 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2415 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2416 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2417 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2418 JVM_END
2421 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2422 JVMWrapper("JVM_GetFieldIxModifiers");
2423 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2424 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2425 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2426 JVM_END
2429 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2430 JVMWrapper("JVM_GetMethodIxLocalsCount");
2431 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2432 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2433 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2434 return method->max_locals();
2435 JVM_END
2438 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2439 JVMWrapper("JVM_GetMethodIxArgsSize");
2440 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2441 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2442 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2443 return method->size_of_parameters();
2444 JVM_END
2447 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2448 JVMWrapper("JVM_GetMethodIxMaxStack");
2449 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2450 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2451 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2452 return method->verifier_max_stack();
2453 JVM_END
2456 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2457 JVMWrapper("JVM_IsConstructorIx");
2458 ResourceMark rm(THREAD);
2459 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2460 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2461 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2462 return method->name() == vmSymbols::object_initializer_name();
2463 JVM_END
2466 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2467 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2468 ResourceMark rm(THREAD);
2469 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2470 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2471 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2472 return method->is_overpass();
2473 JVM_END
2475 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2476 JVMWrapper("JVM_GetMethodIxIxUTF");
2477 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2478 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2479 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2480 return method->name()->as_utf8();
2481 JVM_END
2484 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2485 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2486 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2487 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2488 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2489 return method->signature()->as_utf8();
2490 JVM_END
2492 /**
2493 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2494 * read entries in the constant pool. Since the old verifier always
2495 * works on a copy of the code, it will not see any rewriting that
2496 * may possibly occur in the middle of verification. So it is important
2497 * that nothing it calls tries to use the cpCache instead of the raw
2498 * constant pool, so we must use cp->uncached_x methods when appropriate.
2499 */
2500 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2501 JVMWrapper("JVM_GetCPFieldNameUTF");
2502 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2503 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2504 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2505 switch (cp->tag_at(cp_index).value()) {
2506 case JVM_CONSTANT_Fieldref:
2507 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2508 default:
2509 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2510 }
2511 ShouldNotReachHere();
2512 return NULL;
2513 JVM_END
2516 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2517 JVMWrapper("JVM_GetCPMethodNameUTF");
2518 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2519 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2520 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2521 switch (cp->tag_at(cp_index).value()) {
2522 case JVM_CONSTANT_InterfaceMethodref:
2523 case JVM_CONSTANT_Methodref:
2524 case JVM_CONSTANT_NameAndType: // for invokedynamic
2525 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2526 default:
2527 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2528 }
2529 ShouldNotReachHere();
2530 return NULL;
2531 JVM_END
2534 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2535 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2536 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2537 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2538 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2539 switch (cp->tag_at(cp_index).value()) {
2540 case JVM_CONSTANT_InterfaceMethodref:
2541 case JVM_CONSTANT_Methodref:
2542 case JVM_CONSTANT_NameAndType: // for invokedynamic
2543 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2544 default:
2545 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2546 }
2547 ShouldNotReachHere();
2548 return NULL;
2549 JVM_END
2552 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2553 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2554 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2555 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2556 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2557 switch (cp->tag_at(cp_index).value()) {
2558 case JVM_CONSTANT_Fieldref:
2559 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2560 default:
2561 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2562 }
2563 ShouldNotReachHere();
2564 return NULL;
2565 JVM_END
2568 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2569 JVMWrapper("JVM_GetCPClassNameUTF");
2570 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2571 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2572 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2573 Symbol* classname = cp->klass_name_at(cp_index);
2574 return classname->as_utf8();
2575 JVM_END
2578 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2579 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2580 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2581 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2582 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2583 switch (cp->tag_at(cp_index).value()) {
2584 case JVM_CONSTANT_Fieldref: {
2585 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2586 Symbol* classname = cp->klass_name_at(class_index);
2587 return classname->as_utf8();
2588 }
2589 default:
2590 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2591 }
2592 ShouldNotReachHere();
2593 return NULL;
2594 JVM_END
2597 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2598 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2599 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2600 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2601 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2602 switch (cp->tag_at(cp_index).value()) {
2603 case JVM_CONSTANT_Methodref:
2604 case JVM_CONSTANT_InterfaceMethodref: {
2605 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2606 Symbol* classname = cp->klass_name_at(class_index);
2607 return classname->as_utf8();
2608 }
2609 default:
2610 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2611 }
2612 ShouldNotReachHere();
2613 return NULL;
2614 JVM_END
2617 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2618 JVMWrapper("JVM_GetCPFieldModifiers");
2619 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2620 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2621 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2622 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2623 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2624 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2625 switch (cp->tag_at(cp_index).value()) {
2626 case JVM_CONSTANT_Fieldref: {
2627 Symbol* name = cp->uncached_name_ref_at(cp_index);
2628 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2629 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2630 if (fs.name() == name && fs.signature() == signature) {
2631 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2632 }
2633 }
2634 return -1;
2635 }
2636 default:
2637 fatal("JVM_GetCPFieldModifiers: illegal constant");
2638 }
2639 ShouldNotReachHere();
2640 return 0;
2641 JVM_END
2644 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2645 JVMWrapper("JVM_GetCPMethodModifiers");
2646 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2647 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2648 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2649 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2650 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2651 switch (cp->tag_at(cp_index).value()) {
2652 case JVM_CONSTANT_Methodref:
2653 case JVM_CONSTANT_InterfaceMethodref: {
2654 Symbol* name = cp->uncached_name_ref_at(cp_index);
2655 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2656 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2657 int methods_count = methods->length();
2658 for (int i = 0; i < methods_count; i++) {
2659 Method* method = methods->at(i);
2660 if (method->name() == name && method->signature() == signature) {
2661 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2662 }
2663 }
2664 return -1;
2665 }
2666 default:
2667 fatal("JVM_GetCPMethodModifiers: illegal constant");
2668 }
2669 ShouldNotReachHere();
2670 return 0;
2671 JVM_END
2674 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2676 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2677 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2678 JVM_END
2681 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2682 JVMWrapper("JVM_IsSameClassPackage");
2683 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2684 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2685 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2686 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2687 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2688 JVM_END
2691 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2693 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2694 JVMWrapper2("JVM_Open (%s)", fname);
2696 //%note jvm_r6
2697 int result = os::open(fname, flags, mode);
2698 if (result >= 0) {
2699 return result;
2700 } else {
2701 switch(errno) {
2702 case EEXIST:
2703 return JVM_EEXIST;
2704 default:
2705 return -1;
2706 }
2707 }
2708 JVM_END
2711 JVM_LEAF(jint, JVM_Close(jint fd))
2712 JVMWrapper2("JVM_Close (0x%x)", fd);
2713 //%note jvm_r6
2714 return os::close(fd);
2715 JVM_END
2718 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2719 JVMWrapper2("JVM_Read (0x%x)", fd);
2721 //%note jvm_r6
2722 return (jint)os::restartable_read(fd, buf, nbytes);
2723 JVM_END
2726 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2727 JVMWrapper2("JVM_Write (0x%x)", fd);
2729 //%note jvm_r6
2730 return (jint)os::write(fd, buf, nbytes);
2731 JVM_END
2734 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2735 JVMWrapper2("JVM_Available (0x%x)", fd);
2736 //%note jvm_r6
2737 return os::available(fd, pbytes);
2738 JVM_END
2741 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2742 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2743 //%note jvm_r6
2744 return os::lseek(fd, offset, whence);
2745 JVM_END
2748 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2749 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2750 return os::ftruncate(fd, length);
2751 JVM_END
2754 JVM_LEAF(jint, JVM_Sync(jint fd))
2755 JVMWrapper2("JVM_Sync (0x%x)", fd);
2756 //%note jvm_r6
2757 return os::fsync(fd);
2758 JVM_END
2761 // Printing support //////////////////////////////////////////////////
2762 extern "C" {
2764 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2765 // see bug 4399518, 4417214
2766 if ((intptr_t)count <= 0) return -1;
2767 return vsnprintf(str, count, fmt, args);
2768 }
2771 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2772 va_list args;
2773 int len;
2774 va_start(args, fmt);
2775 len = jio_vsnprintf(str, count, fmt, args);
2776 va_end(args);
2777 return len;
2778 }
2781 int jio_fprintf(FILE* f, const char *fmt, ...) {
2782 int len;
2783 va_list args;
2784 va_start(args, fmt);
2785 len = jio_vfprintf(f, fmt, args);
2786 va_end(args);
2787 return len;
2788 }
2791 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2792 if (Arguments::vfprintf_hook() != NULL) {
2793 return Arguments::vfprintf_hook()(f, fmt, args);
2794 } else {
2795 return vfprintf(f, fmt, args);
2796 }
2797 }
2800 JNIEXPORT int jio_printf(const char *fmt, ...) {
2801 int len;
2802 va_list args;
2803 va_start(args, fmt);
2804 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2805 va_end(args);
2806 return len;
2807 }
2810 // HotSpot specific jio method
2811 void jio_print(const char* s) {
2812 // Try to make this function as atomic as possible.
2813 if (Arguments::vfprintf_hook() != NULL) {
2814 jio_fprintf(defaultStream::output_stream(), "%s", s);
2815 } else {
2816 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2817 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2818 }
2819 }
2821 } // Extern C
2823 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2825 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2826 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2827 // OSThread objects. The exception to this rule is when the target object is the thread
2828 // doing the operation, in which case we know that the thread won't exit until the
2829 // operation is done (all exits being voluntary). There are a few cases where it is
2830 // rather silly to do operations on yourself, like resuming yourself or asking whether
2831 // you are alive. While these can still happen, they are not subject to deadlocks if
2832 // the lock is held while the operation occurs (this is not the case for suspend, for
2833 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2834 // implementation is local to this file, we always lock Threads_lock for that one.
2836 static void thread_entry(JavaThread* thread, TRAPS) {
2837 HandleMark hm(THREAD);
2838 Handle obj(THREAD, thread->threadObj());
2839 JavaValue result(T_VOID);
2840 JavaCalls::call_virtual(&result,
2841 obj,
2842 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2843 vmSymbols::run_method_name(),
2844 vmSymbols::void_method_signature(),
2845 THREAD);
2846 }
2849 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2850 JVMWrapper("JVM_StartThread");
2851 JavaThread *native_thread = NULL;
2853 // We cannot hold the Threads_lock when we throw an exception,
2854 // due to rank ordering issues. Example: we might need to grab the
2855 // Heap_lock while we construct the exception.
2856 bool throw_illegal_thread_state = false;
2858 // We must release the Threads_lock before we can post a jvmti event
2859 // in Thread::start.
2860 {
2861 // Ensure that the C++ Thread and OSThread structures aren't freed before
2862 // we operate.
2863 MutexLocker mu(Threads_lock);
2865 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2866 // re-starting an already started thread, so we should usually find
2867 // that the JavaThread is null. However for a JNI attached thread
2868 // there is a small window between the Thread object being created
2869 // (with its JavaThread set) and the update to its threadStatus, so we
2870 // have to check for this
2871 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2872 throw_illegal_thread_state = true;
2873 } else {
2874 // We could also check the stillborn flag to see if this thread was already stopped, but
2875 // for historical reasons we let the thread detect that itself when it starts running
2877 jlong size =
2878 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2879 // Allocate the C++ Thread structure and create the native thread. The
2880 // stack size retrieved from java is signed, but the constructor takes
2881 // size_t (an unsigned type), so avoid passing negative values which would
2882 // result in really large stacks.
2883 size_t sz = size > 0 ? (size_t) size : 0;
2884 native_thread = new JavaThread(&thread_entry, sz);
2886 // At this point it may be possible that no osthread was created for the
2887 // JavaThread due to lack of memory. Check for this situation and throw
2888 // an exception if necessary. Eventually we may want to change this so
2889 // that we only grab the lock if the thread was created successfully -
2890 // then we can also do this check and throw the exception in the
2891 // JavaThread constructor.
2892 if (native_thread->osthread() != NULL) {
2893 // Note: the current thread is not being used within "prepare".
2894 native_thread->prepare(jthread);
2895 }
2896 }
2897 }
2899 if (throw_illegal_thread_state) {
2900 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2901 }
2903 assert(native_thread != NULL, "Starting null thread?");
2905 if (native_thread->osthread() == NULL) {
2906 // No one should hold a reference to the 'native_thread'.
2907 delete native_thread;
2908 if (JvmtiExport::should_post_resource_exhausted()) {
2909 JvmtiExport::post_resource_exhausted(
2910 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2911 "unable to create new native thread");
2912 }
2913 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2914 "unable to create new native thread");
2915 }
2917 Thread::start(native_thread);
2919 JVM_END
2921 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2922 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2923 // but is thought to be reliable and simple. In the case, where the receiver is the
2924 // same thread as the sender, no safepoint is needed.
2925 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2926 JVMWrapper("JVM_StopThread");
2928 oop java_throwable = JNIHandles::resolve(throwable);
2929 if (java_throwable == NULL) {
2930 THROW(vmSymbols::java_lang_NullPointerException());
2931 }
2932 oop java_thread = JNIHandles::resolve_non_null(jthread);
2933 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2934 Events::log_exception(JavaThread::current(),
2935 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2936 receiver, (address)java_thread, throwable);
2937 // First check if thread is alive
2938 if (receiver != NULL) {
2939 // Check if exception is getting thrown at self (use oop equality, since the
2940 // target object might exit)
2941 if (java_thread == thread->threadObj()) {
2942 THROW_OOP(java_throwable);
2943 } else {
2944 // Enques a VM_Operation to stop all threads and then deliver the exception...
2945 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2946 }
2947 }
2948 else {
2949 // Either:
2950 // - target thread has not been started before being stopped, or
2951 // - target thread already terminated
2952 // We could read the threadStatus to determine which case it is
2953 // but that is overkill as it doesn't matter. We must set the
2954 // stillborn flag for the first case, and if the thread has already
2955 // exited setting this flag has no affect
2956 java_lang_Thread::set_stillborn(java_thread);
2957 }
2958 JVM_END
2961 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2962 JVMWrapper("JVM_IsThreadAlive");
2964 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2965 return java_lang_Thread::is_alive(thread_oop);
2966 JVM_END
2969 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2970 JVMWrapper("JVM_SuspendThread");
2971 oop java_thread = JNIHandles::resolve_non_null(jthread);
2972 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2974 if (receiver != NULL) {
2975 // thread has run and has not exited (still on threads list)
2977 {
2978 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2979 if (receiver->is_external_suspend()) {
2980 // Don't allow nested external suspend requests. We can't return
2981 // an error from this interface so just ignore the problem.
2982 return;
2983 }
2984 if (receiver->is_exiting()) { // thread is in the process of exiting
2985 return;
2986 }
2987 receiver->set_external_suspend();
2988 }
2990 // java_suspend() will catch threads in the process of exiting
2991 // and will ignore them.
2992 receiver->java_suspend();
2994 // It would be nice to have the following assertion in all the
2995 // time, but it is possible for a racing resume request to have
2996 // resumed this thread right after we suspended it. Temporarily
2997 // enable this assertion if you are chasing a different kind of
2998 // bug.
2999 //
3000 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
3001 // receiver->is_being_ext_suspended(), "thread is not suspended");
3002 }
3003 JVM_END
3006 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
3007 JVMWrapper("JVM_ResumeThread");
3008 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
3009 // We need to *always* get the threads lock here, since this operation cannot be allowed during
3010 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
3011 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
3012 // looks at it.
3013 MutexLocker ml(Threads_lock);
3014 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3015 if (thr != NULL) {
3016 // the thread has run and is not in the process of exiting
3017 thr->java_resume();
3018 }
3019 JVM_END
3022 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3023 JVMWrapper("JVM_SetThreadPriority");
3024 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3025 MutexLocker ml(Threads_lock);
3026 oop java_thread = JNIHandles::resolve_non_null(jthread);
3027 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3028 JavaThread* thr = java_lang_Thread::thread(java_thread);
3029 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
3030 Thread::set_priority(thr, (ThreadPriority)prio);
3031 }
3032 JVM_END
3035 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3036 JVMWrapper("JVM_Yield");
3037 if (os::dont_yield()) return;
3038 #ifndef USDT2
3039 HS_DTRACE_PROBE0(hotspot, thread__yield);
3040 #else /* USDT2 */
3041 HOTSPOT_THREAD_YIELD();
3042 #endif /* USDT2 */
3043 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
3044 // Critical for similar threading behaviour
3045 if (ConvertYieldToSleep) {
3046 os::sleep(thread, MinSleepInterval, false);
3047 } else {
3048 os::yield();
3049 }
3050 JVM_END
3053 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3054 JVMWrapper("JVM_Sleep");
3056 if (millis < 0) {
3057 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3058 }
3060 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3061 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3062 }
3064 // Save current thread state and restore it at the end of this block.
3065 // And set new thread state to SLEEPING.
3066 JavaThreadSleepState jtss(thread);
3068 #ifndef USDT2
3069 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
3070 #else /* USDT2 */
3071 HOTSPOT_THREAD_SLEEP_BEGIN(
3072 millis);
3073 #endif /* USDT2 */
3075 if (millis == 0) {
3076 // When ConvertSleepToYield is on, this matches the classic VM implementation of
3077 // JVM_Sleep. Critical for similar threading behaviour (Win32)
3078 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3079 // for SOLARIS
3080 if (ConvertSleepToYield) {
3081 os::yield();
3082 } else {
3083 ThreadState old_state = thread->osthread()->get_state();
3084 thread->osthread()->set_state(SLEEPING);
3085 os::sleep(thread, MinSleepInterval, false);
3086 thread->osthread()->set_state(old_state);
3087 }
3088 } else {
3089 ThreadState old_state = thread->osthread()->get_state();
3090 thread->osthread()->set_state(SLEEPING);
3091 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3092 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3093 // us while we were sleeping. We do not overwrite those.
3094 if (!HAS_PENDING_EXCEPTION) {
3095 #ifndef USDT2
3096 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
3097 #else /* USDT2 */
3098 HOTSPOT_THREAD_SLEEP_END(
3099 1);
3100 #endif /* USDT2 */
3101 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3102 // to properly restore the thread state. That's likely wrong.
3103 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3104 }
3105 }
3106 thread->osthread()->set_state(old_state);
3107 }
3108 #ifndef USDT2
3109 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
3110 #else /* USDT2 */
3111 HOTSPOT_THREAD_SLEEP_END(
3112 0);
3113 #endif /* USDT2 */
3114 JVM_END
3116 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3117 JVMWrapper("JVM_CurrentThread");
3118 oop jthread = thread->threadObj();
3119 assert (thread != NULL, "no current thread!");
3120 return JNIHandles::make_local(env, jthread);
3121 JVM_END
3124 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3125 JVMWrapper("JVM_CountStackFrames");
3127 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3128 oop java_thread = JNIHandles::resolve_non_null(jthread);
3129 bool throw_illegal_thread_state = false;
3130 int count = 0;
3132 {
3133 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3134 // We need to re-resolve the java_thread, since a GC might have happened during the
3135 // acquire of the lock
3136 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3138 if (thr == NULL) {
3139 // do nothing
3140 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3141 // Check whether this java thread has been suspended already. If not, throws
3142 // IllegalThreadStateException. We defer to throw that exception until
3143 // Threads_lock is released since loading exception class has to leave VM.
3144 // The correct way to test a thread is actually suspended is
3145 // wait_for_ext_suspend_completion(), but we can't call that while holding
3146 // the Threads_lock. The above tests are sufficient for our purposes
3147 // provided the walkability of the stack is stable - which it isn't
3148 // 100% but close enough for most practical purposes.
3149 throw_illegal_thread_state = true;
3150 } else {
3151 // Count all java activation, i.e., number of vframes
3152 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3153 // Native frames are not counted
3154 if (!vfst.method()->is_native()) count++;
3155 }
3156 }
3157 }
3159 if (throw_illegal_thread_state) {
3160 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3161 "this thread is not suspended");
3162 }
3163 return count;
3164 JVM_END
3166 // Consider: A better way to implement JVM_Interrupt() is to acquire
3167 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3168 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3169 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3170 // outside the critical section. Threads_lock is hot so we want to minimize
3171 // the hold-time. A cleaner interface would be to decompose interrupt into
3172 // two steps. The 1st phase, performed under Threads_lock, would return
3173 // a closure that'd be invoked after Threads_lock was dropped.
3174 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3175 // admit spurious wakeups.
3177 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3178 JVMWrapper("JVM_Interrupt");
3180 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3181 oop java_thread = JNIHandles::resolve_non_null(jthread);
3182 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3183 // We need to re-resolve the java_thread, since a GC might have happened during the
3184 // acquire of the lock
3185 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3186 if (thr != NULL) {
3187 Thread::interrupt(thr);
3188 }
3189 JVM_END
3192 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3193 JVMWrapper("JVM_IsInterrupted");
3195 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3196 oop java_thread = JNIHandles::resolve_non_null(jthread);
3197 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3198 // We need to re-resolve the java_thread, since a GC might have happened during the
3199 // acquire of the lock
3200 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3201 if (thr == NULL) {
3202 return JNI_FALSE;
3203 } else {
3204 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3205 }
3206 JVM_END
3209 // Return true iff the current thread has locked the object passed in
3211 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3212 JVMWrapper("JVM_HoldsLock");
3213 assert(THREAD->is_Java_thread(), "sanity check");
3214 if (obj == NULL) {
3215 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3216 }
3217 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3218 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3219 JVM_END
3222 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3223 JVMWrapper("JVM_DumpAllStacks");
3224 VM_PrintThreads op;
3225 VMThread::execute(&op);
3226 if (JvmtiExport::should_post_data_dump()) {
3227 JvmtiExport::post_data_dump();
3228 }
3229 JVM_END
3231 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3232 JVMWrapper("JVM_SetNativeThreadName");
3233 ResourceMark rm(THREAD);
3234 oop java_thread = JNIHandles::resolve_non_null(jthread);
3235 JavaThread* thr = java_lang_Thread::thread(java_thread);
3236 // Thread naming only supported for the current thread, doesn't work for
3237 // target threads.
3238 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3239 // we don't set the name of an attached thread to avoid stepping
3240 // on other programs
3241 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3242 os::set_native_thread_name(thread_name);
3243 }
3244 JVM_END
3246 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3248 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3249 assert(jthread->is_Java_thread(), "must be a Java thread");
3250 if (jthread->privileged_stack_top() == NULL) return false;
3251 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3252 oop loader = jthread->privileged_stack_top()->class_loader();
3253 if (loader == NULL) return true;
3254 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3255 if (trusted) return true;
3256 }
3257 return false;
3258 }
3260 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3261 JVMWrapper("JVM_CurrentLoadedClass");
3262 ResourceMark rm(THREAD);
3264 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3265 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3266 bool trusted = is_trusted_frame(thread, &vfst);
3267 if (trusted) return NULL;
3269 Method* m = vfst.method();
3270 if (!m->is_native()) {
3271 InstanceKlass* holder = m->method_holder();
3272 oop loader = holder->class_loader();
3273 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3274 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3275 }
3276 }
3277 }
3278 return NULL;
3279 JVM_END
3282 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3283 JVMWrapper("JVM_CurrentClassLoader");
3284 ResourceMark rm(THREAD);
3286 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3288 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3289 bool trusted = is_trusted_frame(thread, &vfst);
3290 if (trusted) return NULL;
3292 Method* m = vfst.method();
3293 if (!m->is_native()) {
3294 InstanceKlass* holder = m->method_holder();
3295 assert(holder->is_klass(), "just checking");
3296 oop loader = holder->class_loader();
3297 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3298 return JNIHandles::make_local(env, loader);
3299 }
3300 }
3301 }
3302 return NULL;
3303 JVM_END
3306 // Utility object for collecting method holders walking down the stack
3307 class KlassLink: public ResourceObj {
3308 public:
3309 KlassHandle klass;
3310 KlassLink* next;
3312 KlassLink(KlassHandle k) { klass = k; next = NULL; }
3313 };
3316 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3317 JVMWrapper("JVM_GetClassContext");
3318 ResourceMark rm(THREAD);
3319 JvmtiVMObjectAllocEventCollector oam;
3320 // Collect linked list of (handles to) method holders
3321 KlassLink* first = NULL;
3322 KlassLink* last = NULL;
3323 int depth = 0;
3324 vframeStream vfst(thread);
3326 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3327 // This must only be called from SecurityManager.getClassContext
3328 Method* m = vfst.method();
3329 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3330 m->name() == vmSymbols::getClassContext_name() &&
3331 m->signature() == vmSymbols::void_class_array_signature())) {
3332 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3333 }
3334 }
3336 // Collect method holders
3337 for (; !vfst.at_end(); vfst.security_next()) {
3338 Method* m = vfst.method();
3339 // Native frames are not returned
3340 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3341 Klass* holder = m->method_holder();
3342 assert(holder->is_klass(), "just checking");
3343 depth++;
3344 KlassLink* l = new KlassLink(KlassHandle(thread, holder));
3345 if (first == NULL) {
3346 first = last = l;
3347 } else {
3348 last->next = l;
3349 last = l;
3350 }
3351 }
3352 }
3354 // Create result array of type [Ljava/lang/Class;
3355 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL);
3356 // Fill in mirrors corresponding to method holders
3357 int index = 0;
3358 while (first != NULL) {
3359 result->obj_at_put(index++, first->klass()->java_mirror());
3360 first = first->next;
3361 }
3362 assert(index == depth, "just checking");
3364 return (jobjectArray) JNIHandles::make_local(env, result);
3365 JVM_END
3368 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3369 JVMWrapper("JVM_ClassDepth");
3370 ResourceMark rm(THREAD);
3371 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3372 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3374 const char* str = java_lang_String::as_utf8_string(class_name_str());
3375 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3376 if (class_name_sym == NULL) {
3377 return -1;
3378 }
3380 int depth = 0;
3382 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3383 if (!vfst.method()->is_native()) {
3384 InstanceKlass* holder = vfst.method()->method_holder();
3385 assert(holder->is_klass(), "just checking");
3386 if (holder->name() == class_name_sym) {
3387 return depth;
3388 }
3389 depth++;
3390 }
3391 }
3392 return -1;
3393 JVM_END
3396 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3397 JVMWrapper("JVM_ClassLoaderDepth");
3398 ResourceMark rm(THREAD);
3399 int depth = 0;
3400 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3401 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3402 bool trusted = is_trusted_frame(thread, &vfst);
3403 if (trusted) return -1;
3405 Method* m = vfst.method();
3406 if (!m->is_native()) {
3407 InstanceKlass* holder = m->method_holder();
3408 assert(holder->is_klass(), "just checking");
3409 oop loader = holder->class_loader();
3410 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3411 return depth;
3412 }
3413 depth++;
3414 }
3415 }
3416 return -1;
3417 JVM_END
3420 // java.lang.Package ////////////////////////////////////////////////////////////////
3423 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3424 JVMWrapper("JVM_GetSystemPackage");
3425 ResourceMark rm(THREAD);
3426 JvmtiVMObjectAllocEventCollector oam;
3427 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3428 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3429 return (jstring) JNIHandles::make_local(result);
3430 JVM_END
3433 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3434 JVMWrapper("JVM_GetSystemPackages");
3435 JvmtiVMObjectAllocEventCollector oam;
3436 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3437 return (jobjectArray) JNIHandles::make_local(result);
3438 JVM_END
3441 // ObjectInputStream ///////////////////////////////////////////////////////////////
3443 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3444 if (current_class == NULL) {
3445 return true;
3446 }
3447 if ((current_class == field_class) || access.is_public()) {
3448 return true;
3449 }
3451 if (access.is_protected()) {
3452 // See if current_class is a subclass of field_class
3453 if (current_class->is_subclass_of(field_class)) {
3454 return true;
3455 }
3456 }
3458 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3459 }
3462 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3463 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3464 JVMWrapper("JVM_AllocateNewObject");
3465 JvmtiVMObjectAllocEventCollector oam;
3466 // Receiver is not used
3467 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3468 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3470 // Cannot instantiate primitive types
3471 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3472 ResourceMark rm(THREAD);
3473 THROW_0(vmSymbols::java_lang_InvalidClassException());
3474 }
3476 // Arrays not allowed here, must use JVM_AllocateNewArray
3477 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3478 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3479 ResourceMark rm(THREAD);
3480 THROW_0(vmSymbols::java_lang_InvalidClassException());
3481 }
3483 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3484 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3486 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3488 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3489 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3491 // Make sure klass is initialized, since we are about to instantiate one of them.
3492 curr_klass->initialize(CHECK_NULL);
3494 methodHandle m (THREAD,
3495 init_klass->find_method(vmSymbols::object_initializer_name(),
3496 vmSymbols::void_method_signature()));
3497 if (m.is_null()) {
3498 ResourceMark rm(THREAD);
3499 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3500 Method::name_and_sig_as_C_string(init_klass(),
3501 vmSymbols::object_initializer_name(),
3502 vmSymbols::void_method_signature()));
3503 }
3505 if (curr_klass == init_klass && !m->is_public()) {
3506 // Calling the constructor for class 'curr_klass'.
3507 // Only allow calls to a public no-arg constructor.
3508 // This path corresponds to creating an Externalizable object.
3509 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3510 }
3512 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3513 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3514 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3515 }
3517 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3518 // Call constructor m. This might call a constructor higher up in the hierachy
3519 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3521 return JNIHandles::make_local(obj());
3522 JVM_END
3525 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3526 JVMWrapper("JVM_AllocateNewArray");
3527 JvmtiVMObjectAllocEventCollector oam;
3528 oop mirror = JNIHandles::resolve_non_null(currClass);
3530 if (java_lang_Class::is_primitive(mirror)) {
3531 THROW_0(vmSymbols::java_lang_InvalidClassException());
3532 }
3533 Klass* k = java_lang_Class::as_Klass(mirror);
3534 oop result;
3536 if (k->oop_is_typeArray()) {
3537 // typeArray
3538 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3539 } else if (k->oop_is_objArray()) {
3540 // objArray
3541 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3542 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3543 result = oak->allocate(length, CHECK_NULL);
3544 } else {
3545 THROW_0(vmSymbols::java_lang_InvalidClassException());
3546 }
3547 return JNIHandles::make_local(env, result);
3548 JVM_END
3551 // Return the first non-null class loader up the execution stack, or null
3552 // if only code from the null class loader is on the stack.
3554 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3555 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3556 // UseNewReflection
3557 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3558 oop loader = vfst.method()->method_holder()->class_loader();
3559 if (loader != NULL) {
3560 return JNIHandles::make_local(env, loader);
3561 }
3562 }
3563 return NULL;
3564 JVM_END
3567 // Load a class relative to the most recent class on the stack with a non-null
3568 // classloader.
3569 // This function has been deprecated and should not be considered part of the
3570 // specified JVM interface.
3572 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3573 jclass currClass, jstring currClassName))
3574 JVMWrapper("JVM_LoadClass0");
3575 // Receiver is not used
3576 ResourceMark rm(THREAD);
3578 // Class name argument is not guaranteed to be in internal format
3579 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3580 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3582 const char* str = java_lang_String::as_utf8_string(string());
3584 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3585 // It's impossible to create this class; the name cannot fit
3586 // into the constant pool.
3587 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3588 }
3590 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3591 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3592 // Find the most recent class on the stack with a non-null classloader
3593 oop loader = NULL;
3594 oop protection_domain = NULL;
3595 if (curr_klass.is_null()) {
3596 for (vframeStream vfst(thread);
3597 !vfst.at_end() && loader == NULL;
3598 vfst.next()) {
3599 if (!vfst.method()->is_native()) {
3600 InstanceKlass* holder = vfst.method()->method_holder();
3601 loader = holder->class_loader();
3602 protection_domain = holder->protection_domain();
3603 }
3604 }
3605 } else {
3606 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3607 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3608 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3609 }
3610 Handle h_loader(THREAD, loader);
3611 Handle h_prot (THREAD, protection_domain);
3612 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3613 false, thread);
3614 if (TraceClassResolution && result != NULL) {
3615 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3616 }
3617 return result;
3618 JVM_END
3621 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3624 // resolve array handle and check arguments
3625 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3626 if (arr == NULL) {
3627 THROW_0(vmSymbols::java_lang_NullPointerException());
3628 }
3629 oop a = JNIHandles::resolve_non_null(arr);
3630 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3631 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3632 }
3633 return arrayOop(a);
3634 }
3637 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3638 JVMWrapper("JVM_GetArrayLength");
3639 arrayOop a = check_array(env, arr, false, CHECK_0);
3640 return a->length();
3641 JVM_END
3644 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3645 JVMWrapper("JVM_Array_Get");
3646 JvmtiVMObjectAllocEventCollector oam;
3647 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3648 jvalue value;
3649 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3650 oop box = Reflection::box(&value, type, CHECK_NULL);
3651 return JNIHandles::make_local(env, box);
3652 JVM_END
3655 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3656 JVMWrapper("JVM_GetPrimitiveArrayElement");
3657 jvalue value;
3658 value.i = 0; // to initialize value before getting used in CHECK
3659 arrayOop a = check_array(env, arr, true, CHECK_(value));
3660 assert(a->is_typeArray(), "just checking");
3661 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3662 BasicType wide_type = (BasicType) wCode;
3663 if (type != wide_type) {
3664 Reflection::widen(&value, type, wide_type, CHECK_(value));
3665 }
3666 return value;
3667 JVM_END
3670 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3671 JVMWrapper("JVM_SetArrayElement");
3672 arrayOop a = check_array(env, arr, false, CHECK);
3673 oop box = JNIHandles::resolve(val);
3674 jvalue value;
3675 value.i = 0; // to initialize value before getting used in CHECK
3676 BasicType value_type;
3677 if (a->is_objArray()) {
3678 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3679 value_type = Reflection::unbox_for_regular_object(box, &value);
3680 } else {
3681 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3682 }
3683 Reflection::array_set(&value, a, index, value_type, CHECK);
3684 JVM_END
3687 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3688 JVMWrapper("JVM_SetPrimitiveArrayElement");
3689 arrayOop a = check_array(env, arr, true, CHECK);
3690 assert(a->is_typeArray(), "just checking");
3691 BasicType value_type = (BasicType) vCode;
3692 Reflection::array_set(&v, a, index, value_type, CHECK);
3693 JVM_END
3696 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3697 JVMWrapper("JVM_NewArray");
3698 JvmtiVMObjectAllocEventCollector oam;
3699 oop element_mirror = JNIHandles::resolve(eltClass);
3700 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3701 return JNIHandles::make_local(env, result);
3702 JVM_END
3705 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3706 JVMWrapper("JVM_NewMultiArray");
3707 JvmtiVMObjectAllocEventCollector oam;
3708 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3709 oop element_mirror = JNIHandles::resolve(eltClass);
3710 assert(dim_array->is_typeArray(), "just checking");
3711 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3712 return JNIHandles::make_local(env, result);
3713 JVM_END
3716 // Networking library support ////////////////////////////////////////////////////////////////////
3718 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3719 JVMWrapper("JVM_InitializeSocketLibrary");
3720 return 0;
3721 JVM_END
3724 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3725 JVMWrapper("JVM_Socket");
3726 return os::socket(domain, type, protocol);
3727 JVM_END
3730 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3731 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3732 //%note jvm_r6
3733 return os::socket_close(fd);
3734 JVM_END
3737 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3738 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3739 //%note jvm_r6
3740 return os::socket_shutdown(fd, howto);
3741 JVM_END
3744 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3745 JVMWrapper2("JVM_Recv (0x%x)", fd);
3746 //%note jvm_r6
3747 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3748 JVM_END
3751 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3752 JVMWrapper2("JVM_Send (0x%x)", fd);
3753 //%note jvm_r6
3754 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3755 JVM_END
3758 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3759 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3760 //%note jvm_r6
3761 return os::timeout(fd, timeout);
3762 JVM_END
3765 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3766 JVMWrapper2("JVM_Listen (0x%x)", fd);
3767 //%note jvm_r6
3768 return os::listen(fd, count);
3769 JVM_END
3772 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3773 JVMWrapper2("JVM_Connect (0x%x)", fd);
3774 //%note jvm_r6
3775 return os::connect(fd, him, (socklen_t)len);
3776 JVM_END
3779 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3780 JVMWrapper2("JVM_Bind (0x%x)", fd);
3781 //%note jvm_r6
3782 return os::bind(fd, him, (socklen_t)len);
3783 JVM_END
3786 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3787 JVMWrapper2("JVM_Accept (0x%x)", fd);
3788 //%note jvm_r6
3789 socklen_t socklen = (socklen_t)(*len);
3790 jint result = os::accept(fd, him, &socklen);
3791 *len = (jint)socklen;
3792 return result;
3793 JVM_END
3796 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3797 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3798 //%note jvm_r6
3799 socklen_t socklen = (socklen_t)(*fromlen);
3800 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3801 *fromlen = (int)socklen;
3802 return result;
3803 JVM_END
3806 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3807 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3808 //%note jvm_r6
3809 socklen_t socklen = (socklen_t)(*len);
3810 jint result = os::get_sock_name(fd, him, &socklen);
3811 *len = (int)socklen;
3812 return result;
3813 JVM_END
3816 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3817 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3818 //%note jvm_r6
3819 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3820 JVM_END
3823 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3824 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3825 //%note jvm_r6
3826 return os::socket_available(fd, pbytes);
3827 JVM_END
3830 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3831 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3832 //%note jvm_r6
3833 socklen_t socklen = (socklen_t)(*optlen);
3834 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3835 *optlen = (int)socklen;
3836 return result;
3837 JVM_END
3840 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3841 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3842 //%note jvm_r6
3843 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3844 JVM_END
3847 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3848 JVMWrapper("JVM_GetHostName");
3849 return os::get_host_name(name, namelen);
3850 JVM_END
3853 // Library support ///////////////////////////////////////////////////////////////////////////
3855 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3856 //%note jvm_ct
3857 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3858 char ebuf[1024];
3859 void *load_result;
3860 {
3861 ThreadToNativeFromVM ttnfvm(thread);
3862 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3863 }
3864 if (load_result == NULL) {
3865 char msg[1024];
3866 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3867 // Since 'ebuf' may contain a string encoded using
3868 // platform encoding scheme, we need to pass
3869 // Exceptions::unsafe_to_utf8 to the new_exception method
3870 // as the last argument. See bug 6367357.
3871 Handle h_exception =
3872 Exceptions::new_exception(thread,
3873 vmSymbols::java_lang_UnsatisfiedLinkError(),
3874 msg, Exceptions::unsafe_to_utf8);
3876 THROW_HANDLE_0(h_exception);
3877 }
3878 return load_result;
3879 JVM_END
3882 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3883 JVMWrapper("JVM_UnloadLibrary");
3884 os::dll_unload(handle);
3885 JVM_END
3888 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3889 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3890 return os::dll_lookup(handle, name);
3891 JVM_END
3894 // Floating point support ////////////////////////////////////////////////////////////////////
3896 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3897 JVMWrapper("JVM_IsNaN");
3898 return g_isnan(a);
3899 JVM_END
3902 // JNI version ///////////////////////////////////////////////////////////////////////////////
3904 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3905 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3906 return Threads::is_supported_jni_version_including_1_1(version);
3907 JVM_END
3910 // String support ///////////////////////////////////////////////////////////////////////////
3912 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3913 JVMWrapper("JVM_InternString");
3914 JvmtiVMObjectAllocEventCollector oam;
3915 if (str == NULL) return NULL;
3916 oop string = JNIHandles::resolve_non_null(str);
3917 oop result = StringTable::intern(string, CHECK_NULL);
3918 return (jstring) JNIHandles::make_local(env, result);
3919 JVM_END
3922 // Raw monitor support //////////////////////////////////////////////////////////////////////
3924 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3925 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3926 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3927 // that only works with java threads.
3930 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3931 VM_Exit::block_if_vm_exited();
3932 JVMWrapper("JVM_RawMonitorCreate");
3933 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3934 }
3937 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3938 VM_Exit::block_if_vm_exited();
3939 JVMWrapper("JVM_RawMonitorDestroy");
3940 delete ((Mutex*) mon);
3941 }
3944 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3945 VM_Exit::block_if_vm_exited();
3946 JVMWrapper("JVM_RawMonitorEnter");
3947 ((Mutex*) mon)->jvm_raw_lock();
3948 return 0;
3949 }
3952 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3953 VM_Exit::block_if_vm_exited();
3954 JVMWrapper("JVM_RawMonitorExit");
3955 ((Mutex*) mon)->jvm_raw_unlock();
3956 }
3959 // Support for Serialization
3961 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3962 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3963 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3964 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3966 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3967 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3968 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3969 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3972 void initialize_converter_functions() {
3973 if (JDK_Version::is_gte_jdk14x_version()) {
3974 // These functions only exist for compatibility with 1.3.1 and earlier
3975 return;
3976 }
3978 // called from universe_post_init()
3979 assert(
3980 int_bits_to_float_fn == NULL &&
3981 long_bits_to_double_fn == NULL &&
3982 float_to_int_bits_fn == NULL &&
3983 double_to_long_bits_fn == NULL ,
3984 "initialization done twice"
3985 );
3986 // initialize
3987 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3988 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3989 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3990 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3991 // verify
3992 assert(
3993 int_bits_to_float_fn != NULL &&
3994 long_bits_to_double_fn != NULL &&
3995 float_to_int_bits_fn != NULL &&
3996 double_to_long_bits_fn != NULL ,
3997 "initialization failed"
3998 );
3999 }
4002 // Serialization
4003 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
4004 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
4005 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
4007 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
4008 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
4009 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
4010 oop o = JNIHandles::resolve(obj);
4012 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
4013 THROW(vmSymbols::java_lang_NullPointerException());
4014 }
4016 jsize nfids = fids->length();
4017 if (nfids == 0) return;
4019 if (tcodes->length() < nfids) {
4020 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
4021 }
4023 jsize off = 0;
4024 /* loop through fields, setting values */
4025 for (jsize i = 0; i < nfids; i++) {
4026 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
4027 int field_offset;
4028 if (fid != NULL) {
4029 // NULL is a legal value for fid, but retrieving the field offset
4030 // trigger assertion in that case
4031 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4032 }
4034 switch (tcodes->char_at(i)) {
4035 case 'Z':
4036 if (fid != NULL) {
4037 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
4038 o->bool_field_put(field_offset, val);
4039 }
4040 off++;
4041 break;
4043 case 'B':
4044 if (fid != NULL) {
4045 o->byte_field_put(field_offset, dbuf->byte_at(off));
4046 }
4047 off++;
4048 break;
4050 case 'C':
4051 if (fid != NULL) {
4052 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
4053 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
4054 o->char_field_put(field_offset, val);
4055 }
4056 off += 2;
4057 break;
4059 case 'S':
4060 if (fid != NULL) {
4061 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
4062 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
4063 o->short_field_put(field_offset, val);
4064 }
4065 off += 2;
4066 break;
4068 case 'I':
4069 if (fid != NULL) {
4070 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
4071 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
4072 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
4073 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
4074 o->int_field_put(field_offset, ival);
4075 }
4076 off += 4;
4077 break;
4079 case 'F':
4080 if (fid != NULL) {
4081 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
4082 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
4083 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
4084 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
4085 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
4086 o->float_field_put(field_offset, fval);
4087 }
4088 off += 4;
4089 break;
4091 case 'J':
4092 if (fid != NULL) {
4093 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
4094 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
4095 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
4096 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
4097 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
4098 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
4099 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
4100 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
4101 o->long_field_put(field_offset, lval);
4102 }
4103 off += 8;
4104 break;
4106 case 'D':
4107 if (fid != NULL) {
4108 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
4109 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
4110 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
4111 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
4112 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
4113 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
4114 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
4115 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
4116 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
4117 o->double_field_put(field_offset, dval);
4118 }
4119 off += 8;
4120 break;
4122 default:
4123 // Illegal typecode
4124 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4125 }
4126 }
4127 JVM_END
4130 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
4131 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
4132 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
4134 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
4135 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
4136 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
4137 oop o = JNIHandles::resolve(obj);
4139 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
4140 THROW(vmSymbols::java_lang_NullPointerException());
4141 }
4143 jsize nfids = fids->length();
4144 if (nfids == 0) return;
4146 if (tcodes->length() < nfids) {
4147 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
4148 }
4150 /* loop through fields, fetching values */
4151 jsize off = 0;
4152 for (jsize i = 0; i < nfids; i++) {
4153 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
4154 if (fid == NULL) {
4155 THROW(vmSymbols::java_lang_NullPointerException());
4156 }
4157 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4159 switch (tcodes->char_at(i)) {
4160 case 'Z':
4161 {
4162 jboolean val = o->bool_field(field_offset);
4163 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
4164 }
4165 break;
4167 case 'B':
4168 dbuf->byte_at_put(off++, o->byte_field(field_offset));
4169 break;
4171 case 'C':
4172 {
4173 jchar val = o->char_field(field_offset);
4174 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4175 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4176 }
4177 break;
4179 case 'S':
4180 {
4181 jshort val = o->short_field(field_offset);
4182 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4183 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4184 }
4185 break;
4187 case 'I':
4188 {
4189 jint val = o->int_field(field_offset);
4190 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4191 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4192 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4193 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4194 }
4195 break;
4197 case 'F':
4198 {
4199 jfloat fval = o->float_field(field_offset);
4200 jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
4201 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
4202 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
4203 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF);
4204 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF);
4205 }
4206 break;
4208 case 'J':
4209 {
4210 jlong val = o->long_field(field_offset);
4211 dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
4212 dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
4213 dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
4214 dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
4215 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4216 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4217 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4218 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4219 }
4220 break;
4222 case 'D':
4223 {
4224 jdouble dval = o->double_field(field_offset);
4225 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
4226 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
4227 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
4228 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
4229 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
4230 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
4231 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
4232 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF);
4233 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF);
4234 }
4235 break;
4237 default:
4238 // Illegal typecode
4239 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4240 }
4241 }
4242 JVM_END
4245 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
4247 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
4248 // Security Note:
4249 // The Java level wrapper will perform the necessary security check allowing
4250 // us to pass the NULL as the initiating class loader.
4251 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
4253 KlassHandle klass_handle(THREAD, klass);
4254 // Check if we should initialize the class
4255 if (init && klass_handle->oop_is_instance()) {
4256 klass_handle->initialize(CHECK_NULL);
4257 }
4258 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4259 }
4262 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4264 #ifndef PRODUCT
4266 extern "C" {
4267 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4268 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4269 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4270 }
4272 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4273 JVMWrapper("JVM_AccessBoolVMFlag");
4274 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
4275 JVM_END
4277 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4278 JVMWrapper("JVM_AccessVMIntFlag");
4279 intx v;
4280 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
4281 *value = (jint)v;
4282 return result;
4283 JVM_END
4286 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4287 JVMWrapper("JVM_VMBreakPoint");
4288 oop the_obj = JNIHandles::resolve(obj);
4289 BREAKPOINT;
4290 JVM_END
4293 #endif
4296 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4298 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4299 JVMWrapper("JVM_InvokeMethod");
4300 Handle method_handle;
4301 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4302 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4303 Handle receiver(THREAD, JNIHandles::resolve(obj));
4304 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4305 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4306 jobject res = JNIHandles::make_local(env, result);
4307 if (JvmtiExport::should_post_vm_object_alloc()) {
4308 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4309 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4310 if (java_lang_Class::is_primitive(ret_type)) {
4311 // Only for primitive type vm allocates memory for java object.
4312 // See box() method.
4313 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4314 }
4315 }
4316 return res;
4317 } else {
4318 THROW_0(vmSymbols::java_lang_StackOverflowError());
4319 }
4320 JVM_END
4323 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4324 JVMWrapper("JVM_NewInstanceFromConstructor");
4325 oop constructor_mirror = JNIHandles::resolve(c);
4326 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4327 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4328 jobject res = JNIHandles::make_local(env, result);
4329 if (JvmtiExport::should_post_vm_object_alloc()) {
4330 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4331 }
4332 return res;
4333 JVM_END
4335 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4337 JVM_LEAF(jboolean, JVM_SupportsCX8())
4338 JVMWrapper("JVM_SupportsCX8");
4339 return VM_Version::supports_cx8();
4340 JVM_END
4343 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4344 JVMWrapper("JVM_CX8Field");
4345 jlong res;
4346 oop o = JNIHandles::resolve(obj);
4347 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4348 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4350 assert(VM_Version::supports_cx8(), "cx8 not supported");
4351 res = Atomic::cmpxchg(newVal, addr, oldVal);
4353 return res == oldVal;
4354 JVM_END
4356 // DTrace ///////////////////////////////////////////////////////////////////
4358 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4359 JVMWrapper("JVM_DTraceGetVersion");
4360 return (jint)JVM_TRACING_DTRACE_VERSION;
4361 JVM_END
4363 JVM_ENTRY(jlong,JVM_DTraceActivate(
4364 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4365 JVM_DTraceProvider* providers))
4366 JVMWrapper("JVM_DTraceActivate");
4367 return DTraceJSDT::activate(
4368 version, module_name, providers_count, providers, CHECK_0);
4369 JVM_END
4371 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4372 JVMWrapper("JVM_DTraceIsProbeEnabled");
4373 return DTraceJSDT::is_probe_enabled(method);
4374 JVM_END
4376 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4377 JVMWrapper("JVM_DTraceDispose");
4378 DTraceJSDT::dispose(handle);
4379 JVM_END
4381 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4382 JVMWrapper("JVM_DTraceIsSupported");
4383 return DTraceJSDT::is_supported();
4384 JVM_END
4386 // Returns an array of all live Thread objects (VM internal JavaThreads,
4387 // jvmti agent threads, and JNI attaching threads are skipped)
4388 // See CR 6404306 regarding JNI attaching threads
4389 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4390 ResourceMark rm(THREAD);
4391 ThreadsListEnumerator tle(THREAD, false, false);
4392 JvmtiVMObjectAllocEventCollector oam;
4394 int num_threads = tle.num_threads();
4395 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4396 objArrayHandle threads_ah(THREAD, r);
4398 for (int i = 0; i < num_threads; i++) {
4399 Handle h = tle.get_threadObj(i);
4400 threads_ah->obj_at_put(i, h());
4401 }
4403 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4404 JVM_END
4407 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4408 // Return StackTraceElement[][], each element is the stack trace of a thread in
4409 // the corresponding entry in the given threads array
4410 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4411 JVMWrapper("JVM_DumpThreads");
4412 JvmtiVMObjectAllocEventCollector oam;
4414 // Check if threads is null
4415 if (threads == NULL) {
4416 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4417 }
4419 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4420 objArrayHandle ah(THREAD, a);
4421 int num_threads = ah->length();
4422 // check if threads is non-empty array
4423 if (num_threads == 0) {
4424 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4425 }
4427 // check if threads is not an array of objects of Thread class
4428 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4429 if (k != SystemDictionary::Thread_klass()) {
4430 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4431 }
4433 ResourceMark rm(THREAD);
4435 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4436 for (int i = 0; i < num_threads; i++) {
4437 oop thread_obj = ah->obj_at(i);
4438 instanceHandle h(THREAD, (instanceOop) thread_obj);
4439 thread_handle_array->append(h);
4440 }
4442 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4443 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4445 JVM_END
4447 // JVM monitoring and management support
4448 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4449 return Management::get_jmm_interface(version);
4450 JVM_END
4452 // com.sun.tools.attach.VirtualMachine agent properties support
4453 //
4454 // Initialize the agent properties with the properties maintained in the VM
4455 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4456 JVMWrapper("JVM_InitAgentProperties");
4457 ResourceMark rm;
4459 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4461 PUTPROP(props, "sun.java.command", Arguments::java_command());
4462 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4463 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4464 return properties;
4465 JVM_END
4467 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4468 {
4469 JVMWrapper("JVM_GetEnclosingMethodInfo");
4470 JvmtiVMObjectAllocEventCollector oam;
4472 if (ofClass == NULL) {
4473 return NULL;
4474 }
4475 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4476 // Special handling for primitive objects
4477 if (java_lang_Class::is_primitive(mirror())) {
4478 return NULL;
4479 }
4480 Klass* k = java_lang_Class::as_Klass(mirror());
4481 if (!k->oop_is_instance()) {
4482 return NULL;
4483 }
4484 instanceKlassHandle ik_h(THREAD, k);
4485 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4486 if (encl_method_class_idx == 0) {
4487 return NULL;
4488 }
4489 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4490 objArrayHandle dest(THREAD, dest_o);
4491 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4492 dest->obj_at_put(0, enc_k->java_mirror());
4493 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4494 if (encl_method_method_idx != 0) {
4495 Symbol* sym = ik_h->constants()->symbol_at(
4496 extract_low_short_from_int(
4497 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4498 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4499 dest->obj_at_put(1, str());
4500 sym = ik_h->constants()->symbol_at(
4501 extract_high_short_from_int(
4502 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4503 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4504 dest->obj_at_put(2, str());
4505 }
4506 return (jobjectArray) JNIHandles::make_local(dest());
4507 }
4508 JVM_END
4510 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4511 jint javaThreadState))
4512 {
4513 // If new thread states are added in future JDK and VM versions,
4514 // this should check if the JDK version is compatible with thread
4515 // states supported by the VM. Return NULL if not compatible.
4516 //
4517 // This function must map the VM java_lang_Thread::ThreadStatus
4518 // to the Java thread state that the JDK supports.
4519 //
4521 typeArrayHandle values_h;
4522 switch (javaThreadState) {
4523 case JAVA_THREAD_STATE_NEW : {
4524 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4525 values_h = typeArrayHandle(THREAD, r);
4526 values_h->int_at_put(0, java_lang_Thread::NEW);
4527 break;
4528 }
4529 case JAVA_THREAD_STATE_RUNNABLE : {
4530 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4531 values_h = typeArrayHandle(THREAD, r);
4532 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4533 break;
4534 }
4535 case JAVA_THREAD_STATE_BLOCKED : {
4536 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4537 values_h = typeArrayHandle(THREAD, r);
4538 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4539 break;
4540 }
4541 case JAVA_THREAD_STATE_WAITING : {
4542 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4543 values_h = typeArrayHandle(THREAD, r);
4544 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4545 values_h->int_at_put(1, java_lang_Thread::PARKED);
4546 break;
4547 }
4548 case JAVA_THREAD_STATE_TIMED_WAITING : {
4549 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4550 values_h = typeArrayHandle(THREAD, r);
4551 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4552 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4553 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4554 break;
4555 }
4556 case JAVA_THREAD_STATE_TERMINATED : {
4557 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4558 values_h = typeArrayHandle(THREAD, r);
4559 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4560 break;
4561 }
4562 default:
4563 // Unknown state - probably incompatible JDK version
4564 return NULL;
4565 }
4567 return (jintArray) JNIHandles::make_local(env, values_h());
4568 }
4569 JVM_END
4572 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4573 jint javaThreadState,
4574 jintArray values))
4575 {
4576 // If new thread states are added in future JDK and VM versions,
4577 // this should check if the JDK version is compatible with thread
4578 // states supported by the VM. Return NULL if not compatible.
4579 //
4580 // This function must map the VM java_lang_Thread::ThreadStatus
4581 // to the Java thread state that the JDK supports.
4582 //
4584 ResourceMark rm;
4586 // Check if threads is null
4587 if (values == NULL) {
4588 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4589 }
4591 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4592 typeArrayHandle values_h(THREAD, v);
4594 objArrayHandle names_h;
4595 switch (javaThreadState) {
4596 case JAVA_THREAD_STATE_NEW : {
4597 assert(values_h->length() == 1 &&
4598 values_h->int_at(0) == java_lang_Thread::NEW,
4599 "Invalid threadStatus value");
4601 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4602 1, /* only 1 substate */
4603 CHECK_NULL);
4604 names_h = objArrayHandle(THREAD, r);
4605 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4606 names_h->obj_at_put(0, name());
4607 break;
4608 }
4609 case JAVA_THREAD_STATE_RUNNABLE : {
4610 assert(values_h->length() == 1 &&
4611 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4612 "Invalid threadStatus value");
4614 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4615 1, /* only 1 substate */
4616 CHECK_NULL);
4617 names_h = objArrayHandle(THREAD, r);
4618 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4619 names_h->obj_at_put(0, name());
4620 break;
4621 }
4622 case JAVA_THREAD_STATE_BLOCKED : {
4623 assert(values_h->length() == 1 &&
4624 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4625 "Invalid threadStatus value");
4627 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4628 1, /* only 1 substate */
4629 CHECK_NULL);
4630 names_h = objArrayHandle(THREAD, r);
4631 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4632 names_h->obj_at_put(0, name());
4633 break;
4634 }
4635 case JAVA_THREAD_STATE_WAITING : {
4636 assert(values_h->length() == 2 &&
4637 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4638 values_h->int_at(1) == java_lang_Thread::PARKED,
4639 "Invalid threadStatus value");
4640 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4641 2, /* number of substates */
4642 CHECK_NULL);
4643 names_h = objArrayHandle(THREAD, r);
4644 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4645 CHECK_NULL);
4646 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4647 CHECK_NULL);
4648 names_h->obj_at_put(0, name0());
4649 names_h->obj_at_put(1, name1());
4650 break;
4651 }
4652 case JAVA_THREAD_STATE_TIMED_WAITING : {
4653 assert(values_h->length() == 3 &&
4654 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4655 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4656 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4657 "Invalid threadStatus value");
4658 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4659 3, /* number of substates */
4660 CHECK_NULL);
4661 names_h = objArrayHandle(THREAD, r);
4662 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4663 CHECK_NULL);
4664 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4665 CHECK_NULL);
4666 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4667 CHECK_NULL);
4668 names_h->obj_at_put(0, name0());
4669 names_h->obj_at_put(1, name1());
4670 names_h->obj_at_put(2, name2());
4671 break;
4672 }
4673 case JAVA_THREAD_STATE_TERMINATED : {
4674 assert(values_h->length() == 1 &&
4675 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4676 "Invalid threadStatus value");
4677 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4678 1, /* only 1 substate */
4679 CHECK_NULL);
4680 names_h = objArrayHandle(THREAD, r);
4681 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4682 names_h->obj_at_put(0, name());
4683 break;
4684 }
4685 default:
4686 // Unknown state - probably incompatible JDK version
4687 return NULL;
4688 }
4689 return (jobjectArray) JNIHandles::make_local(env, names_h());
4690 }
4691 JVM_END
4693 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4694 {
4695 memset(info, 0, sizeof(info_size));
4697 info->jvm_version = Abstract_VM_Version::jvm_version();
4698 info->update_version = 0; /* 0 in HotSpot Express VM */
4699 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4701 // when we add a new capability in the jvm_version_info struct, we should also
4702 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4703 // counter defined in runtimeService.cpp.
4704 info->is_attachable = AttachListener::is_attach_supported();
4705 }
4706 JVM_END