Mon, 17 Jun 2013 11:17:49 +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 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1077 // If there are no signers set in the class, or if the class
1078 // is an array, return NULL.
1079 if (signers == NULL) return NULL;
1081 // copy of the signers array
1082 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1083 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1084 for (int index = 0; index < signers->length(); index++) {
1085 signers_copy->obj_at_put(index, signers->obj_at(index));
1086 }
1088 // return the copy
1089 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1090 JVM_END
1093 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1094 JVMWrapper("JVM_SetClassSigners");
1095 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1096 // This call is ignored for primitive types and arrays.
1097 // Signers are only set once, ClassLoader.java, and thus shouldn't
1098 // be called with an array. Only the bootstrap loader creates arrays.
1099 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1100 if (k->oop_is_instance()) {
1101 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1102 }
1103 }
1104 JVM_END
1107 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1108 JVMWrapper("JVM_GetProtectionDomain");
1109 if (JNIHandles::resolve(cls) == NULL) {
1110 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1111 }
1113 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1114 // Primitive types does not have a protection domain.
1115 return NULL;
1116 }
1118 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1119 return (jobject) JNIHandles::make_local(env, pd);
1120 JVM_END
1123 // Obsolete since 1.2 (Class.setProtectionDomain removed), although
1124 // still defined in core libraries as of 1.5.
1125 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain))
1126 JVMWrapper("JVM_SetProtectionDomain");
1127 if (JNIHandles::resolve(cls) == NULL) {
1128 THROW(vmSymbols::java_lang_NullPointerException());
1129 }
1130 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1131 // Call is ignored for primitive types
1132 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1134 // cls won't be an array, as this called only from ClassLoader.defineClass
1135 if (k->oop_is_instance()) {
1136 oop pd = JNIHandles::resolve(protection_domain);
1137 assert(pd == NULL || pd->is_oop(), "just checking");
1138 java_lang_Class::set_protection_domain(k->java_mirror(), pd);
1139 }
1140 }
1141 JVM_END
1143 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1144 // If there is a security manager and protection domain, check the access
1145 // in the protection domain, otherwise it is authorized.
1146 if (java_lang_System::has_security_manager()) {
1148 // For bootstrapping, if pd implies method isn't in the JDK, allow
1149 // this context to revert to older behavior.
1150 // In this case the isAuthorized field in AccessControlContext is also not
1151 // present.
1152 if (Universe::protection_domain_implies_method() == NULL) {
1153 return true;
1154 }
1156 // Whitelist certain access control contexts
1157 if (java_security_AccessControlContext::is_authorized(context)) {
1158 return true;
1159 }
1161 oop prot = klass->protection_domain();
1162 if (prot != NULL) {
1163 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1164 // in the new wrapper.
1165 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1166 Handle h_prot(THREAD, prot);
1167 JavaValue result(T_BOOLEAN);
1168 JavaCallArguments args(h_prot);
1169 JavaCalls::call(&result, m, &args, CHECK_false);
1170 return (result.get_jboolean() != 0);
1171 }
1172 }
1173 return true;
1174 }
1176 // Create an AccessControlContext with a protection domain with null codesource
1177 // and null permissions - which gives no permissions.
1178 oop create_dummy_access_control_context(TRAPS) {
1179 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass());
1180 // new ProtectionDomain(null,null);
1181 oop null_protection_domain = pd_klass->allocate_instance(CHECK_NULL);
1182 Handle null_pd(THREAD, null_protection_domain);
1184 // new ProtectionDomain[] {pd};
1185 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1186 context->obj_at_put(0, null_pd());
1188 // new AccessControlContext(new ProtectionDomain[] {pd})
1189 objArrayHandle h_context(THREAD, context);
1190 oop result = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1191 return result;
1192 }
1194 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1195 JVMWrapper("JVM_DoPrivileged");
1197 if (action == NULL) {
1198 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1199 }
1201 // Compute the frame initiating the do privileged operation and setup the privileged stack
1202 vframeStream vfst(thread);
1203 vfst.security_get_caller_frame(1);
1205 if (vfst.at_end()) {
1206 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1207 }
1209 Method* method = vfst.method();
1210 instanceKlassHandle klass (THREAD, method->method_holder());
1212 // Check that action object understands "Object run()"
1213 Handle h_context;
1214 if (context != NULL) {
1215 h_context = Handle(THREAD, JNIHandles::resolve(context));
1216 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1217 if (!authorized) {
1218 // Create an unprivileged access control object and call it's run function
1219 // instead.
1220 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1221 h_context = Handle(THREAD, noprivs);
1222 }
1223 }
1225 // Check that action object understands "Object run()"
1226 Handle object (THREAD, JNIHandles::resolve(action));
1228 // get run() method
1229 Method* m_oop = object->klass()->uncached_lookup_method(
1230 vmSymbols::run_method_name(),
1231 vmSymbols::void_object_signature());
1232 methodHandle m (THREAD, m_oop);
1233 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1234 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1235 }
1237 // Stack allocated list of privileged stack elements
1238 PrivilegedElement pi;
1239 if (!vfst.at_end()) {
1240 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1241 thread->set_privileged_stack_top(&pi);
1242 }
1245 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1246 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1247 Handle pending_exception;
1248 JavaValue result(T_OBJECT);
1249 JavaCallArguments args(object);
1250 JavaCalls::call(&result, m, &args, THREAD);
1252 // done with action, remove ourselves from the list
1253 if (!vfst.at_end()) {
1254 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1255 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1256 }
1258 if (HAS_PENDING_EXCEPTION) {
1259 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1260 CLEAR_PENDING_EXCEPTION;
1262 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1263 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1264 // Throw a java.security.PrivilegedActionException(Exception e) exception
1265 JavaCallArguments args(pending_exception);
1266 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1267 vmSymbols::exception_void_signature(),
1268 &args);
1269 }
1270 }
1272 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1273 return JNIHandles::make_local(env, (oop) result.get_jobject());
1274 JVM_END
1277 // Returns the inherited_access_control_context field of the running thread.
1278 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1279 JVMWrapper("JVM_GetInheritedAccessControlContext");
1280 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1281 return JNIHandles::make_local(env, result);
1282 JVM_END
1284 class RegisterArrayForGC {
1285 private:
1286 JavaThread *_thread;
1287 public:
1288 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1289 _thread = thread;
1290 _thread->register_array_for_gc(array);
1291 }
1293 ~RegisterArrayForGC() {
1294 _thread->register_array_for_gc(NULL);
1295 }
1296 };
1299 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1300 JVMWrapper("JVM_GetStackAccessControlContext");
1301 if (!UsePrivilegedStack) return NULL;
1303 ResourceMark rm(THREAD);
1304 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1305 JvmtiVMObjectAllocEventCollector oam;
1307 // count the protection domains on the execution stack. We collapse
1308 // duplicate consecutive protection domains into a single one, as
1309 // well as stopping when we hit a privileged frame.
1311 // Use vframeStream to iterate through Java frames
1312 vframeStream vfst(thread);
1314 oop previous_protection_domain = NULL;
1315 Handle privileged_context(thread, NULL);
1316 bool is_privileged = false;
1317 oop protection_domain = NULL;
1319 for(; !vfst.at_end(); vfst.next()) {
1320 // get method of frame
1321 Method* method = vfst.method();
1322 intptr_t* frame_id = vfst.frame_id();
1324 // check the privileged frames to see if we have a match
1325 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1326 // this frame is privileged
1327 is_privileged = true;
1328 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1329 protection_domain = thread->privileged_stack_top()->protection_domain();
1330 } else {
1331 protection_domain = method->method_holder()->protection_domain();
1332 }
1334 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1335 local_array->push(protection_domain);
1336 previous_protection_domain = protection_domain;
1337 }
1339 if (is_privileged) break;
1340 }
1343 // either all the domains on the stack were system domains, or
1344 // we had a privileged system domain
1345 if (local_array->is_empty()) {
1346 if (is_privileged && privileged_context.is_null()) return NULL;
1348 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1349 return JNIHandles::make_local(env, result);
1350 }
1352 // the resource area must be registered in case of a gc
1353 RegisterArrayForGC ragc(thread, local_array);
1354 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1355 local_array->length(), CHECK_NULL);
1356 objArrayHandle h_context(thread, context);
1357 for (int index = 0; index < local_array->length(); index++) {
1358 h_context->obj_at_put(index, local_array->at(index));
1359 }
1361 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1363 return JNIHandles::make_local(env, result);
1364 JVM_END
1367 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1368 JVMWrapper("JVM_IsArrayClass");
1369 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1370 return (k != NULL) && k->oop_is_array() ? true : false;
1371 JVM_END
1374 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1375 JVMWrapper("JVM_IsPrimitiveClass");
1376 oop mirror = JNIHandles::resolve_non_null(cls);
1377 return (jboolean) java_lang_Class::is_primitive(mirror);
1378 JVM_END
1381 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1382 JVMWrapper("JVM_GetComponentType");
1383 oop mirror = JNIHandles::resolve_non_null(cls);
1384 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1385 return (jclass) JNIHandles::make_local(env, result);
1386 JVM_END
1389 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1390 JVMWrapper("JVM_GetClassModifiers");
1391 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1392 // Primitive type
1393 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1394 }
1396 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1397 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1398 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1399 return k->modifier_flags();
1400 JVM_END
1403 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1405 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1406 JvmtiVMObjectAllocEventCollector oam;
1407 // ofClass is a reference to a java_lang_Class object. The mirror object
1408 // of an InstanceKlass
1410 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1411 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1412 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1413 return (jobjectArray)JNIHandles::make_local(env, result);
1414 }
1416 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1417 InnerClassesIterator iter(k);
1419 if (iter.length() == 0) {
1420 // Neither an inner nor outer class
1421 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1422 return (jobjectArray)JNIHandles::make_local(env, result);
1423 }
1425 // find inner class info
1426 constantPoolHandle cp(thread, k->constants());
1427 int length = iter.length();
1429 // Allocate temp. result array
1430 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1431 objArrayHandle result (THREAD, r);
1432 int members = 0;
1434 for (; !iter.done(); iter.next()) {
1435 int ioff = iter.inner_class_info_index();
1436 int ooff = iter.outer_class_info_index();
1438 if (ioff != 0 && ooff != 0) {
1439 // Check to see if the name matches the class we're looking for
1440 // before attempting to find the class.
1441 if (cp->klass_name_at_matches(k, ooff)) {
1442 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1443 if (outer_klass == k()) {
1444 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1445 instanceKlassHandle inner_klass (THREAD, ik);
1447 // Throws an exception if outer klass has not declared k as
1448 // an inner klass
1449 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1451 result->obj_at_put(members, inner_klass->java_mirror());
1452 members++;
1453 }
1454 }
1455 }
1456 }
1458 if (members != length) {
1459 // Return array of right length
1460 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1461 for(int i = 0; i < members; i++) {
1462 res->obj_at_put(i, result->obj_at(i));
1463 }
1464 return (jobjectArray)JNIHandles::make_local(env, res);
1465 }
1467 return (jobjectArray)JNIHandles::make_local(env, result());
1468 JVM_END
1471 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1472 {
1473 // ofClass is a reference to a java_lang_Class object.
1474 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1475 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1476 return NULL;
1477 }
1479 bool inner_is_member = false;
1480 Klass* outer_klass
1481 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1482 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1483 if (outer_klass == NULL) return NULL; // already a top-level class
1484 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1485 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1486 }
1487 JVM_END
1489 // should be in InstanceKlass.cpp, but is here for historical reasons
1490 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1491 bool* inner_is_member,
1492 TRAPS) {
1493 Thread* thread = THREAD;
1494 InnerClassesIterator iter(k);
1495 if (iter.length() == 0) {
1496 // No inner class info => no declaring class
1497 return NULL;
1498 }
1500 constantPoolHandle i_cp(thread, k->constants());
1502 bool found = false;
1503 Klass* ok;
1504 instanceKlassHandle outer_klass;
1505 *inner_is_member = false;
1507 // Find inner_klass attribute
1508 for (; !iter.done() && !found; iter.next()) {
1509 int ioff = iter.inner_class_info_index();
1510 int ooff = iter.outer_class_info_index();
1511 int noff = iter.inner_name_index();
1512 if (ioff != 0) {
1513 // Check to see if the name matches the class we're looking for
1514 // before attempting to find the class.
1515 if (i_cp->klass_name_at_matches(k, ioff)) {
1516 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1517 found = (k() == inner_klass);
1518 if (found && ooff != 0) {
1519 ok = i_cp->klass_at(ooff, CHECK_NULL);
1520 outer_klass = instanceKlassHandle(thread, ok);
1521 *inner_is_member = true;
1522 }
1523 }
1524 }
1525 }
1527 if (found && outer_klass.is_null()) {
1528 // It may be anonymous; try for that.
1529 int encl_method_class_idx = k->enclosing_method_class_index();
1530 if (encl_method_class_idx != 0) {
1531 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1532 outer_klass = instanceKlassHandle(thread, ok);
1533 *inner_is_member = false;
1534 }
1535 }
1537 // If no inner class attribute found for this class.
1538 if (outer_klass.is_null()) return NULL;
1540 // Throws an exception if outer klass has not declared k as an inner klass
1541 // We need evidence that each klass knows about the other, or else
1542 // the system could allow a spoof of an inner class to gain access rights.
1543 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1544 return outer_klass();
1545 }
1547 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1548 assert (cls != NULL, "illegal class");
1549 JVMWrapper("JVM_GetClassSignature");
1550 JvmtiVMObjectAllocEventCollector oam;
1551 ResourceMark rm(THREAD);
1552 // Return null for arrays and primatives
1553 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1554 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1555 if (k->oop_is_instance()) {
1556 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1557 if (sym == NULL) return NULL;
1558 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1559 return (jstring) JNIHandles::make_local(env, str());
1560 }
1561 }
1562 return NULL;
1563 JVM_END
1566 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1567 assert (cls != NULL, "illegal class");
1568 JVMWrapper("JVM_GetClassAnnotations");
1570 // Return null for arrays and primitives
1571 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1572 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1573 if (k->oop_is_instance()) {
1574 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1575 return (jbyteArray) JNIHandles::make_local(env, a);
1576 }
1577 }
1578 return NULL;
1579 JVM_END
1582 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1583 // some of this code was adapted from from jni_FromReflectedField
1585 oop reflected = JNIHandles::resolve_non_null(field);
1586 oop mirror = java_lang_reflect_Field::clazz(reflected);
1587 Klass* k = java_lang_Class::as_Klass(mirror);
1588 int slot = java_lang_reflect_Field::slot(reflected);
1589 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1591 KlassHandle kh(THREAD, k);
1592 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1594 if (modifiers & JVM_ACC_STATIC) {
1595 // for static fields we only look in the current class
1596 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1597 assert(false, "cannot find static field");
1598 return false;
1599 }
1600 } else {
1601 // for instance fields we start with the current class and work
1602 // our way up through the superclass chain
1603 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1604 assert(false, "cannot find instance field");
1605 return false;
1606 }
1607 }
1608 return true;
1609 }
1611 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1612 // field is a handle to a java.lang.reflect.Field object
1613 assert(field != NULL, "illegal field");
1614 JVMWrapper("JVM_GetFieldAnnotations");
1616 fieldDescriptor fd;
1617 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1618 if (!gotFd) {
1619 return NULL;
1620 }
1622 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1623 JVM_END
1626 static Method* jvm_get_method_common(jobject method) {
1627 // some of this code was adapted from from jni_FromReflectedMethod
1629 oop reflected = JNIHandles::resolve_non_null(method);
1630 oop mirror = NULL;
1631 int slot = 0;
1633 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1634 mirror = java_lang_reflect_Constructor::clazz(reflected);
1635 slot = java_lang_reflect_Constructor::slot(reflected);
1636 } else {
1637 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1638 "wrong type");
1639 mirror = java_lang_reflect_Method::clazz(reflected);
1640 slot = java_lang_reflect_Method::slot(reflected);
1641 }
1642 Klass* k = java_lang_Class::as_Klass(mirror);
1644 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1645 assert(m != NULL, "cannot find method");
1646 return m; // caller has to deal with NULL in product mode
1647 }
1650 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1651 JVMWrapper("JVM_GetMethodAnnotations");
1653 // method is a handle to a java.lang.reflect.Method object
1654 Method* m = jvm_get_method_common(method);
1655 if (m == NULL) {
1656 return NULL;
1657 }
1659 return (jbyteArray) JNIHandles::make_local(env,
1660 Annotations::make_java_array(m->annotations(), THREAD));
1661 JVM_END
1664 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1665 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1667 // method is a handle to a java.lang.reflect.Method object
1668 Method* m = jvm_get_method_common(method);
1669 if (m == NULL) {
1670 return NULL;
1671 }
1673 return (jbyteArray) JNIHandles::make_local(env,
1674 Annotations::make_java_array(m->annotation_default(), THREAD));
1675 JVM_END
1678 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1679 JVMWrapper("JVM_GetMethodParameterAnnotations");
1681 // method is a handle to a java.lang.reflect.Method object
1682 Method* m = jvm_get_method_common(method);
1683 if (m == NULL) {
1684 return NULL;
1685 }
1687 return (jbyteArray) JNIHandles::make_local(env,
1688 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1689 JVM_END
1691 /* Type use annotations support (JDK 1.8) */
1693 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1694 assert (cls != NULL, "illegal class");
1695 JVMWrapper("JVM_GetClassTypeAnnotations");
1696 ResourceMark rm(THREAD);
1697 // Return null for arrays and primitives
1698 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1699 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1700 if (k->oop_is_instance()) {
1701 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1702 if (type_annotations != NULL) {
1703 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1704 return (jbyteArray) JNIHandles::make_local(env, a);
1705 }
1706 }
1707 }
1708 return NULL;
1709 JVM_END
1711 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1712 assert (method != NULL, "illegal method");
1713 JVMWrapper("JVM_GetMethodTypeAnnotations");
1715 // method is a handle to a java.lang.reflect.Method object
1716 Method* m = jvm_get_method_common(method);
1717 if (m == NULL) {
1718 return NULL;
1719 }
1721 AnnotationArray* type_annotations = m->type_annotations();
1722 if (type_annotations != NULL) {
1723 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1724 return (jbyteArray) JNIHandles::make_local(env, a);
1725 }
1727 return NULL;
1728 JVM_END
1730 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1731 assert (field != NULL, "illegal field");
1732 JVMWrapper("JVM_GetFieldTypeAnnotations");
1734 fieldDescriptor fd;
1735 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1736 if (!gotFd) {
1737 return NULL;
1738 }
1740 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1741 JVM_END
1743 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1744 if (!cp->is_within_bounds(index)) {
1745 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1746 }
1747 }
1749 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1750 {
1751 JVMWrapper("JVM_GetMethodParameters");
1752 // method is a handle to a java.lang.reflect.Method object
1753 Method* method_ptr = jvm_get_method_common(method);
1754 methodHandle mh (THREAD, method_ptr);
1755 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1756 const int num_params = mh->method_parameters_length();
1758 if (0 != num_params) {
1759 // make sure all the symbols are properly formatted
1760 for (int i = 0; i < num_params; i++) {
1761 MethodParametersElement* params = mh->method_parameters_start();
1762 int index = params[i].name_cp_index;
1763 bounds_check(mh->constants(), index, CHECK_NULL);
1765 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1766 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1767 "Wrong type at constant pool index");
1768 }
1770 }
1772 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1773 objArrayHandle result (THREAD, result_oop);
1775 for (int i = 0; i < num_params; i++) {
1776 MethodParametersElement* params = mh->method_parameters_start();
1777 // For a 0 index, give a NULL symbol
1778 Symbol* sym = 0 != params[i].name_cp_index ?
1779 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1780 int flags = params[i].flags;
1781 oop param = Reflection::new_parameter(reflected_method, i, sym,
1782 flags, CHECK_NULL);
1783 result->obj_at_put(i, param);
1784 }
1785 return (jobjectArray)JNIHandles::make_local(env, result());
1786 } else {
1787 return (jobjectArray)NULL;
1788 }
1789 }
1790 JVM_END
1792 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1794 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1795 {
1796 JVMWrapper("JVM_GetClassDeclaredFields");
1797 JvmtiVMObjectAllocEventCollector oam;
1799 // Exclude primitive types and array types
1800 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1801 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1802 // Return empty array
1803 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1804 return (jobjectArray) JNIHandles::make_local(env, res);
1805 }
1807 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1808 constantPoolHandle cp(THREAD, k->constants());
1810 // Ensure class is linked
1811 k->link_class(CHECK_NULL);
1813 // 4496456 We need to filter out java.lang.Throwable.backtrace
1814 bool skip_backtrace = false;
1816 // Allocate result
1817 int num_fields;
1819 if (publicOnly) {
1820 num_fields = 0;
1821 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1822 if (fs.access_flags().is_public()) ++num_fields;
1823 }
1824 } else {
1825 num_fields = k->java_fields_count();
1827 if (k() == SystemDictionary::Throwable_klass()) {
1828 num_fields--;
1829 skip_backtrace = true;
1830 }
1831 }
1833 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1834 objArrayHandle result (THREAD, r);
1836 int out_idx = 0;
1837 fieldDescriptor fd;
1838 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1839 if (skip_backtrace) {
1840 // 4496456 skip java.lang.Throwable.backtrace
1841 int offset = fs.offset();
1842 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1843 }
1845 if (!publicOnly || fs.access_flags().is_public()) {
1846 fd.initialize(k(), fs.index());
1847 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1848 result->obj_at_put(out_idx, field);
1849 ++out_idx;
1850 }
1851 }
1852 assert(out_idx == num_fields, "just checking");
1853 return (jobjectArray) JNIHandles::make_local(env, result());
1854 }
1855 JVM_END
1857 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1858 {
1859 JVMWrapper("JVM_GetClassDeclaredMethods");
1860 JvmtiVMObjectAllocEventCollector oam;
1862 // Exclude primitive types and array types
1863 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1864 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1865 // Return empty array
1866 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL);
1867 return (jobjectArray) JNIHandles::make_local(env, res);
1868 }
1870 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1872 // Ensure class is linked
1873 k->link_class(CHECK_NULL);
1875 Array<Method*>* methods = k->methods();
1876 int methods_length = methods->length();
1877 int num_methods = 0;
1879 int i;
1880 for (i = 0; i < methods_length; i++) {
1881 methodHandle method(THREAD, methods->at(i));
1882 if (!method->is_initializer() && !method->is_overpass()) {
1883 if (!publicOnly || method->is_public()) {
1884 ++num_methods;
1885 }
1886 }
1887 }
1889 // Allocate result
1890 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL);
1891 objArrayHandle result (THREAD, r);
1893 int out_idx = 0;
1894 for (i = 0; i < methods_length; i++) {
1895 methodHandle method(THREAD, methods->at(i));
1896 if (!method->is_initializer() && !method->is_overpass()) {
1897 if (!publicOnly || method->is_public()) {
1898 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1899 result->obj_at_put(out_idx, m);
1900 ++out_idx;
1901 }
1902 }
1903 }
1904 assert(out_idx == num_methods, "just checking");
1905 return (jobjectArray) JNIHandles::make_local(env, result());
1906 }
1907 JVM_END
1909 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1910 {
1911 JVMWrapper("JVM_GetClassDeclaredConstructors");
1912 JvmtiVMObjectAllocEventCollector oam;
1914 // Exclude primitive types and array types
1915 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1916 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1917 // Return empty array
1918 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL);
1919 return (jobjectArray) JNIHandles::make_local(env, res);
1920 }
1922 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1924 // Ensure class is linked
1925 k->link_class(CHECK_NULL);
1927 Array<Method*>* methods = k->methods();
1928 int methods_length = methods->length();
1929 int num_constructors = 0;
1931 int i;
1932 for (i = 0; i < methods_length; i++) {
1933 methodHandle method(THREAD, methods->at(i));
1934 if (method->is_initializer() && !method->is_static()) {
1935 if (!publicOnly || method->is_public()) {
1936 ++num_constructors;
1937 }
1938 }
1939 }
1941 // Allocate result
1942 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL);
1943 objArrayHandle result(THREAD, r);
1945 int out_idx = 0;
1946 for (i = 0; i < methods_length; i++) {
1947 methodHandle method(THREAD, methods->at(i));
1948 if (method->is_initializer() && !method->is_static()) {
1949 if (!publicOnly || method->is_public()) {
1950 oop m = Reflection::new_constructor(method, CHECK_NULL);
1951 result->obj_at_put(out_idx, m);
1952 ++out_idx;
1953 }
1954 }
1955 }
1956 assert(out_idx == num_constructors, "just checking");
1957 return (jobjectArray) JNIHandles::make_local(env, result());
1958 }
1959 JVM_END
1961 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1962 {
1963 JVMWrapper("JVM_GetClassAccessFlags");
1964 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1965 // Primitive type
1966 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1967 }
1969 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1970 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1971 }
1972 JVM_END
1975 // Constant pool access //////////////////////////////////////////////////////////
1977 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1978 {
1979 JVMWrapper("JVM_GetClassConstantPool");
1980 JvmtiVMObjectAllocEventCollector oam;
1982 // Return null for primitives and arrays
1983 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1984 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1985 if (k->oop_is_instance()) {
1986 instanceKlassHandle k_h(THREAD, k);
1987 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1988 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1989 return JNIHandles::make_local(jcp());
1990 }
1991 }
1992 return NULL;
1993 }
1994 JVM_END
1997 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1998 {
1999 JVMWrapper("JVM_ConstantPoolGetSize");
2000 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2001 return cp->length();
2002 }
2003 JVM_END
2006 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2007 {
2008 JVMWrapper("JVM_ConstantPoolGetClassAt");
2009 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2010 bounds_check(cp, index, CHECK_NULL);
2011 constantTag tag = cp->tag_at(index);
2012 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2013 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2014 }
2015 Klass* k = cp->klass_at(index, CHECK_NULL);
2016 return (jclass) JNIHandles::make_local(k->java_mirror());
2017 }
2018 JVM_END
2020 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2021 {
2022 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
2023 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2024 bounds_check(cp, index, CHECK_NULL);
2025 constantTag tag = cp->tag_at(index);
2026 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2027 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2028 }
2029 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2030 if (k == NULL) return NULL;
2031 return (jclass) JNIHandles::make_local(k->java_mirror());
2032 }
2033 JVM_END
2035 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2036 constantTag tag = cp->tag_at(index);
2037 if (!tag.is_method() && !tag.is_interface_method()) {
2038 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2039 }
2040 int klass_ref = cp->uncached_klass_ref_index_at(index);
2041 Klass* k_o;
2042 if (force_resolution) {
2043 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2044 } else {
2045 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2046 if (k_o == NULL) return NULL;
2047 }
2048 instanceKlassHandle k(THREAD, k_o);
2049 Symbol* name = cp->uncached_name_ref_at(index);
2050 Symbol* sig = cp->uncached_signature_ref_at(index);
2051 methodHandle m (THREAD, k->find_method(name, sig));
2052 if (m.is_null()) {
2053 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2054 }
2055 oop method;
2056 if (!m->is_initializer() || m->is_static()) {
2057 method = Reflection::new_method(m, true, true, CHECK_NULL);
2058 } else {
2059 method = Reflection::new_constructor(m, CHECK_NULL);
2060 }
2061 return JNIHandles::make_local(method);
2062 }
2064 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2065 {
2066 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2067 JvmtiVMObjectAllocEventCollector oam;
2068 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2069 bounds_check(cp, index, CHECK_NULL);
2070 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2071 return res;
2072 }
2073 JVM_END
2075 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2076 {
2077 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2078 JvmtiVMObjectAllocEventCollector oam;
2079 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2080 bounds_check(cp, index, CHECK_NULL);
2081 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2082 return res;
2083 }
2084 JVM_END
2086 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2087 constantTag tag = cp->tag_at(index);
2088 if (!tag.is_field()) {
2089 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2090 }
2091 int klass_ref = cp->uncached_klass_ref_index_at(index);
2092 Klass* k_o;
2093 if (force_resolution) {
2094 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2095 } else {
2096 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2097 if (k_o == NULL) return NULL;
2098 }
2099 instanceKlassHandle k(THREAD, k_o);
2100 Symbol* name = cp->uncached_name_ref_at(index);
2101 Symbol* sig = cp->uncached_signature_ref_at(index);
2102 fieldDescriptor fd;
2103 Klass* target_klass = k->find_field(name, sig, &fd);
2104 if (target_klass == NULL) {
2105 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2106 }
2107 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
2108 return JNIHandles::make_local(field);
2109 }
2111 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2112 {
2113 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2114 JvmtiVMObjectAllocEventCollector oam;
2115 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2116 bounds_check(cp, index, CHECK_NULL);
2117 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2118 return res;
2119 }
2120 JVM_END
2122 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2123 {
2124 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2125 JvmtiVMObjectAllocEventCollector oam;
2126 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2127 bounds_check(cp, index, CHECK_NULL);
2128 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2129 return res;
2130 }
2131 JVM_END
2133 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2134 {
2135 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2136 JvmtiVMObjectAllocEventCollector oam;
2137 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2138 bounds_check(cp, index, CHECK_NULL);
2139 constantTag tag = cp->tag_at(index);
2140 if (!tag.is_field_or_method()) {
2141 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2142 }
2143 int klass_ref = cp->uncached_klass_ref_index_at(index);
2144 Symbol* klass_name = cp->klass_name_at(klass_ref);
2145 Symbol* member_name = cp->uncached_name_ref_at(index);
2146 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2147 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2148 objArrayHandle dest(THREAD, dest_o);
2149 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2150 dest->obj_at_put(0, str());
2151 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2152 dest->obj_at_put(1, str());
2153 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2154 dest->obj_at_put(2, str());
2155 return (jobjectArray) JNIHandles::make_local(dest());
2156 }
2157 JVM_END
2159 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2160 {
2161 JVMWrapper("JVM_ConstantPoolGetIntAt");
2162 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2163 bounds_check(cp, index, CHECK_0);
2164 constantTag tag = cp->tag_at(index);
2165 if (!tag.is_int()) {
2166 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2167 }
2168 return cp->int_at(index);
2169 }
2170 JVM_END
2172 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2173 {
2174 JVMWrapper("JVM_ConstantPoolGetLongAt");
2175 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2176 bounds_check(cp, index, CHECK_(0L));
2177 constantTag tag = cp->tag_at(index);
2178 if (!tag.is_long()) {
2179 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2180 }
2181 return cp->long_at(index);
2182 }
2183 JVM_END
2185 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2186 {
2187 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2188 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2189 bounds_check(cp, index, CHECK_(0.0f));
2190 constantTag tag = cp->tag_at(index);
2191 if (!tag.is_float()) {
2192 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2193 }
2194 return cp->float_at(index);
2195 }
2196 JVM_END
2198 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2199 {
2200 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2201 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2202 bounds_check(cp, index, CHECK_(0.0));
2203 constantTag tag = cp->tag_at(index);
2204 if (!tag.is_double()) {
2205 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2206 }
2207 return cp->double_at(index);
2208 }
2209 JVM_END
2211 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2212 {
2213 JVMWrapper("JVM_ConstantPoolGetStringAt");
2214 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2215 bounds_check(cp, index, CHECK_NULL);
2216 constantTag tag = cp->tag_at(index);
2217 if (!tag.is_string()) {
2218 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2219 }
2220 oop str = cp->string_at(index, CHECK_NULL);
2221 return (jstring) JNIHandles::make_local(str);
2222 }
2223 JVM_END
2225 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2226 {
2227 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2228 JvmtiVMObjectAllocEventCollector oam;
2229 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2230 bounds_check(cp, index, CHECK_NULL);
2231 constantTag tag = cp->tag_at(index);
2232 if (!tag.is_symbol()) {
2233 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2234 }
2235 Symbol* sym = cp->symbol_at(index);
2236 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2237 return (jstring) JNIHandles::make_local(str());
2238 }
2239 JVM_END
2242 // Assertion support. //////////////////////////////////////////////////////////
2244 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2245 JVMWrapper("JVM_DesiredAssertionStatus");
2246 assert(cls != NULL, "bad class");
2248 oop r = JNIHandles::resolve(cls);
2249 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2250 if (java_lang_Class::is_primitive(r)) return false;
2252 Klass* k = java_lang_Class::as_Klass(r);
2253 assert(k->oop_is_instance(), "must be an instance klass");
2254 if (! k->oop_is_instance()) return false;
2256 ResourceMark rm(THREAD);
2257 const char* name = k->name()->as_C_string();
2258 bool system_class = k->class_loader() == NULL;
2259 return JavaAssertions::enabled(name, system_class);
2261 JVM_END
2264 // Return a new AssertionStatusDirectives object with the fields filled in with
2265 // command-line assertion arguments (i.e., -ea, -da).
2266 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2267 JVMWrapper("JVM_AssertionStatusDirectives");
2268 JvmtiVMObjectAllocEventCollector oam;
2269 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2270 return JNIHandles::make_local(env, asd);
2271 JVM_END
2273 // Verification ////////////////////////////////////////////////////////////////////////////////
2275 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2277 // RedefineClasses support: bug 6214132 caused verification to fail.
2278 // All functions from this section should call the jvmtiThreadSate function:
2279 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2280 // The function returns a Klass* of the _scratch_class if the verifier
2281 // was invoked in the middle of the class redefinition.
2282 // Otherwise it returns its argument value which is the _the_class Klass*.
2283 // Please, refer to the description in the jvmtiThreadSate.hpp.
2285 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2286 JVMWrapper("JVM_GetClassNameUTF");
2287 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2288 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2289 return k->name()->as_utf8();
2290 JVM_END
2293 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2294 JVMWrapper("JVM_GetClassCPTypes");
2295 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2296 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2297 // types will have length zero if this is not an InstanceKlass
2298 // (length is determined by call to JVM_GetClassCPEntriesCount)
2299 if (k->oop_is_instance()) {
2300 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2301 for (int index = cp->length() - 1; index >= 0; index--) {
2302 constantTag tag = cp->tag_at(index);
2303 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2304 }
2305 }
2306 JVM_END
2309 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2310 JVMWrapper("JVM_GetClassCPEntriesCount");
2311 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2312 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2313 if (!k->oop_is_instance())
2314 return 0;
2315 return InstanceKlass::cast(k)->constants()->length();
2316 JVM_END
2319 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2320 JVMWrapper("JVM_GetClassFieldsCount");
2321 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2322 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2323 if (!k->oop_is_instance())
2324 return 0;
2325 return InstanceKlass::cast(k)->java_fields_count();
2326 JVM_END
2329 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2330 JVMWrapper("JVM_GetClassMethodsCount");
2331 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2332 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2333 if (!k->oop_is_instance())
2334 return 0;
2335 return InstanceKlass::cast(k)->methods()->length();
2336 JVM_END
2339 // The following methods, used for the verifier, are never called with
2340 // array klasses, so a direct cast to InstanceKlass is safe.
2341 // Typically, these methods are called in a loop with bounds determined
2342 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2343 // zero for arrays.
2344 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2345 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2346 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2347 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2348 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2349 int length = method->checked_exceptions_length();
2350 if (length > 0) {
2351 CheckedExceptionElement* table= method->checked_exceptions_start();
2352 for (int i = 0; i < length; i++) {
2353 exceptions[i] = table[i].class_cp_index;
2354 }
2355 }
2356 JVM_END
2359 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2360 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2361 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2362 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2363 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2364 return method->checked_exceptions_length();
2365 JVM_END
2368 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2369 JVMWrapper("JVM_GetMethodIxByteCode");
2370 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2371 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2372 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2373 memcpy(code, method->code_base(), method->code_size());
2374 JVM_END
2377 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2378 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2379 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2380 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2381 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2382 return method->code_size();
2383 JVM_END
2386 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2387 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2388 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2389 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2390 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2391 ExceptionTable extable(method);
2392 entry->start_pc = extable.start_pc(entry_index);
2393 entry->end_pc = extable.end_pc(entry_index);
2394 entry->handler_pc = extable.handler_pc(entry_index);
2395 entry->catchType = extable.catch_type_index(entry_index);
2396 JVM_END
2399 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2400 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2401 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2402 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2403 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2404 return method->exception_table_length();
2405 JVM_END
2408 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2409 JVMWrapper("JVM_GetMethodIxModifiers");
2410 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2411 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2412 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2413 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2414 JVM_END
2417 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2418 JVMWrapper("JVM_GetFieldIxModifiers");
2419 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2420 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2421 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2422 JVM_END
2425 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2426 JVMWrapper("JVM_GetMethodIxLocalsCount");
2427 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2428 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2429 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2430 return method->max_locals();
2431 JVM_END
2434 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2435 JVMWrapper("JVM_GetMethodIxArgsSize");
2436 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2437 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2438 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2439 return method->size_of_parameters();
2440 JVM_END
2443 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2444 JVMWrapper("JVM_GetMethodIxMaxStack");
2445 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2446 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2447 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2448 return method->verifier_max_stack();
2449 JVM_END
2452 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2453 JVMWrapper("JVM_IsConstructorIx");
2454 ResourceMark rm(THREAD);
2455 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2456 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2457 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2458 return method->name() == vmSymbols::object_initializer_name();
2459 JVM_END
2462 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2463 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2464 ResourceMark rm(THREAD);
2465 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2466 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2467 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2468 return method->is_overpass();
2469 JVM_END
2471 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2472 JVMWrapper("JVM_GetMethodIxIxUTF");
2473 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2474 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2475 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2476 return method->name()->as_utf8();
2477 JVM_END
2480 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2481 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2482 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2483 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2484 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2485 return method->signature()->as_utf8();
2486 JVM_END
2488 /**
2489 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2490 * read entries in the constant pool. Since the old verifier always
2491 * works on a copy of the code, it will not see any rewriting that
2492 * may possibly occur in the middle of verification. So it is important
2493 * that nothing it calls tries to use the cpCache instead of the raw
2494 * constant pool, so we must use cp->uncached_x methods when appropriate.
2495 */
2496 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2497 JVMWrapper("JVM_GetCPFieldNameUTF");
2498 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2499 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2500 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2501 switch (cp->tag_at(cp_index).value()) {
2502 case JVM_CONSTANT_Fieldref:
2503 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2504 default:
2505 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2506 }
2507 ShouldNotReachHere();
2508 return NULL;
2509 JVM_END
2512 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2513 JVMWrapper("JVM_GetCPMethodNameUTF");
2514 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2515 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2516 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2517 switch (cp->tag_at(cp_index).value()) {
2518 case JVM_CONSTANT_InterfaceMethodref:
2519 case JVM_CONSTANT_Methodref:
2520 case JVM_CONSTANT_NameAndType: // for invokedynamic
2521 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2522 default:
2523 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2524 }
2525 ShouldNotReachHere();
2526 return NULL;
2527 JVM_END
2530 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2531 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2532 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2533 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2534 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2535 switch (cp->tag_at(cp_index).value()) {
2536 case JVM_CONSTANT_InterfaceMethodref:
2537 case JVM_CONSTANT_Methodref:
2538 case JVM_CONSTANT_NameAndType: // for invokedynamic
2539 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2540 default:
2541 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2542 }
2543 ShouldNotReachHere();
2544 return NULL;
2545 JVM_END
2548 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2549 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2550 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2551 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2552 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2553 switch (cp->tag_at(cp_index).value()) {
2554 case JVM_CONSTANT_Fieldref:
2555 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2556 default:
2557 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2558 }
2559 ShouldNotReachHere();
2560 return NULL;
2561 JVM_END
2564 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2565 JVMWrapper("JVM_GetCPClassNameUTF");
2566 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2567 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2568 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2569 Symbol* classname = cp->klass_name_at(cp_index);
2570 return classname->as_utf8();
2571 JVM_END
2574 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2575 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2576 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2577 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2578 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2579 switch (cp->tag_at(cp_index).value()) {
2580 case JVM_CONSTANT_Fieldref: {
2581 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2582 Symbol* classname = cp->klass_name_at(class_index);
2583 return classname->as_utf8();
2584 }
2585 default:
2586 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2587 }
2588 ShouldNotReachHere();
2589 return NULL;
2590 JVM_END
2593 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2594 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2595 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2596 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2597 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2598 switch (cp->tag_at(cp_index).value()) {
2599 case JVM_CONSTANT_Methodref:
2600 case JVM_CONSTANT_InterfaceMethodref: {
2601 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2602 Symbol* classname = cp->klass_name_at(class_index);
2603 return classname->as_utf8();
2604 }
2605 default:
2606 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2607 }
2608 ShouldNotReachHere();
2609 return NULL;
2610 JVM_END
2613 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2614 JVMWrapper("JVM_GetCPFieldModifiers");
2615 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2616 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2617 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2618 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2619 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2620 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2621 switch (cp->tag_at(cp_index).value()) {
2622 case JVM_CONSTANT_Fieldref: {
2623 Symbol* name = cp->uncached_name_ref_at(cp_index);
2624 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2625 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2626 if (fs.name() == name && fs.signature() == signature) {
2627 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2628 }
2629 }
2630 return -1;
2631 }
2632 default:
2633 fatal("JVM_GetCPFieldModifiers: illegal constant");
2634 }
2635 ShouldNotReachHere();
2636 return 0;
2637 JVM_END
2640 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2641 JVMWrapper("JVM_GetCPMethodModifiers");
2642 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2643 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2644 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2645 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2646 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2647 switch (cp->tag_at(cp_index).value()) {
2648 case JVM_CONSTANT_Methodref:
2649 case JVM_CONSTANT_InterfaceMethodref: {
2650 Symbol* name = cp->uncached_name_ref_at(cp_index);
2651 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2652 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2653 int methods_count = methods->length();
2654 for (int i = 0; i < methods_count; i++) {
2655 Method* method = methods->at(i);
2656 if (method->name() == name && method->signature() == signature) {
2657 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2658 }
2659 }
2660 return -1;
2661 }
2662 default:
2663 fatal("JVM_GetCPMethodModifiers: illegal constant");
2664 }
2665 ShouldNotReachHere();
2666 return 0;
2667 JVM_END
2670 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2672 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2673 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2674 JVM_END
2677 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2678 JVMWrapper("JVM_IsSameClassPackage");
2679 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2680 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2681 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2682 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2683 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2684 JVM_END
2687 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2689 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2690 JVMWrapper2("JVM_Open (%s)", fname);
2692 //%note jvm_r6
2693 int result = os::open(fname, flags, mode);
2694 if (result >= 0) {
2695 return result;
2696 } else {
2697 switch(errno) {
2698 case EEXIST:
2699 return JVM_EEXIST;
2700 default:
2701 return -1;
2702 }
2703 }
2704 JVM_END
2707 JVM_LEAF(jint, JVM_Close(jint fd))
2708 JVMWrapper2("JVM_Close (0x%x)", fd);
2709 //%note jvm_r6
2710 return os::close(fd);
2711 JVM_END
2714 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2715 JVMWrapper2("JVM_Read (0x%x)", fd);
2717 //%note jvm_r6
2718 return (jint)os::restartable_read(fd, buf, nbytes);
2719 JVM_END
2722 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2723 JVMWrapper2("JVM_Write (0x%x)", fd);
2725 //%note jvm_r6
2726 return (jint)os::write(fd, buf, nbytes);
2727 JVM_END
2730 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2731 JVMWrapper2("JVM_Available (0x%x)", fd);
2732 //%note jvm_r6
2733 return os::available(fd, pbytes);
2734 JVM_END
2737 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2738 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2739 //%note jvm_r6
2740 return os::lseek(fd, offset, whence);
2741 JVM_END
2744 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2745 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2746 return os::ftruncate(fd, length);
2747 JVM_END
2750 JVM_LEAF(jint, JVM_Sync(jint fd))
2751 JVMWrapper2("JVM_Sync (0x%x)", fd);
2752 //%note jvm_r6
2753 return os::fsync(fd);
2754 JVM_END
2757 // Printing support //////////////////////////////////////////////////
2758 extern "C" {
2760 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2761 // see bug 4399518, 4417214
2762 if ((intptr_t)count <= 0) return -1;
2763 return vsnprintf(str, count, fmt, args);
2764 }
2767 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2768 va_list args;
2769 int len;
2770 va_start(args, fmt);
2771 len = jio_vsnprintf(str, count, fmt, args);
2772 va_end(args);
2773 return len;
2774 }
2777 int jio_fprintf(FILE* f, const char *fmt, ...) {
2778 int len;
2779 va_list args;
2780 va_start(args, fmt);
2781 len = jio_vfprintf(f, fmt, args);
2782 va_end(args);
2783 return len;
2784 }
2787 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2788 if (Arguments::vfprintf_hook() != NULL) {
2789 return Arguments::vfprintf_hook()(f, fmt, args);
2790 } else {
2791 return vfprintf(f, fmt, args);
2792 }
2793 }
2796 JNIEXPORT int jio_printf(const char *fmt, ...) {
2797 int len;
2798 va_list args;
2799 va_start(args, fmt);
2800 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2801 va_end(args);
2802 return len;
2803 }
2806 // HotSpot specific jio method
2807 void jio_print(const char* s) {
2808 // Try to make this function as atomic as possible.
2809 if (Arguments::vfprintf_hook() != NULL) {
2810 jio_fprintf(defaultStream::output_stream(), "%s", s);
2811 } else {
2812 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2813 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2814 }
2815 }
2817 } // Extern C
2819 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2821 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2822 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2823 // OSThread objects. The exception to this rule is when the target object is the thread
2824 // doing the operation, in which case we know that the thread won't exit until the
2825 // operation is done (all exits being voluntary). There are a few cases where it is
2826 // rather silly to do operations on yourself, like resuming yourself or asking whether
2827 // you are alive. While these can still happen, they are not subject to deadlocks if
2828 // the lock is held while the operation occurs (this is not the case for suspend, for
2829 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2830 // implementation is local to this file, we always lock Threads_lock for that one.
2832 static void thread_entry(JavaThread* thread, TRAPS) {
2833 HandleMark hm(THREAD);
2834 Handle obj(THREAD, thread->threadObj());
2835 JavaValue result(T_VOID);
2836 JavaCalls::call_virtual(&result,
2837 obj,
2838 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2839 vmSymbols::run_method_name(),
2840 vmSymbols::void_method_signature(),
2841 THREAD);
2842 }
2845 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2846 JVMWrapper("JVM_StartThread");
2847 JavaThread *native_thread = NULL;
2849 // We cannot hold the Threads_lock when we throw an exception,
2850 // due to rank ordering issues. Example: we might need to grab the
2851 // Heap_lock while we construct the exception.
2852 bool throw_illegal_thread_state = false;
2854 // We must release the Threads_lock before we can post a jvmti event
2855 // in Thread::start.
2856 {
2857 // Ensure that the C++ Thread and OSThread structures aren't freed before
2858 // we operate.
2859 MutexLocker mu(Threads_lock);
2861 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2862 // re-starting an already started thread, so we should usually find
2863 // that the JavaThread is null. However for a JNI attached thread
2864 // there is a small window between the Thread object being created
2865 // (with its JavaThread set) and the update to its threadStatus, so we
2866 // have to check for this
2867 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2868 throw_illegal_thread_state = true;
2869 } else {
2870 // We could also check the stillborn flag to see if this thread was already stopped, but
2871 // for historical reasons we let the thread detect that itself when it starts running
2873 jlong size =
2874 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2875 // Allocate the C++ Thread structure and create the native thread. The
2876 // stack size retrieved from java is signed, but the constructor takes
2877 // size_t (an unsigned type), so avoid passing negative values which would
2878 // result in really large stacks.
2879 size_t sz = size > 0 ? (size_t) size : 0;
2880 native_thread = new JavaThread(&thread_entry, sz);
2882 // At this point it may be possible that no osthread was created for the
2883 // JavaThread due to lack of memory. Check for this situation and throw
2884 // an exception if necessary. Eventually we may want to change this so
2885 // that we only grab the lock if the thread was created successfully -
2886 // then we can also do this check and throw the exception in the
2887 // JavaThread constructor.
2888 if (native_thread->osthread() != NULL) {
2889 // Note: the current thread is not being used within "prepare".
2890 native_thread->prepare(jthread);
2891 }
2892 }
2893 }
2895 if (throw_illegal_thread_state) {
2896 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2897 }
2899 assert(native_thread != NULL, "Starting null thread?");
2901 if (native_thread->osthread() == NULL) {
2902 // No one should hold a reference to the 'native_thread'.
2903 delete native_thread;
2904 if (JvmtiExport::should_post_resource_exhausted()) {
2905 JvmtiExport::post_resource_exhausted(
2906 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2907 "unable to create new native thread");
2908 }
2909 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2910 "unable to create new native thread");
2911 }
2913 Thread::start(native_thread);
2915 JVM_END
2917 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2918 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2919 // but is thought to be reliable and simple. In the case, where the receiver is the
2920 // same thread as the sender, no safepoint is needed.
2921 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2922 JVMWrapper("JVM_StopThread");
2924 oop java_throwable = JNIHandles::resolve(throwable);
2925 if (java_throwable == NULL) {
2926 THROW(vmSymbols::java_lang_NullPointerException());
2927 }
2928 oop java_thread = JNIHandles::resolve_non_null(jthread);
2929 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2930 Events::log_exception(JavaThread::current(),
2931 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2932 receiver, (address)java_thread, throwable);
2933 // First check if thread is alive
2934 if (receiver != NULL) {
2935 // Check if exception is getting thrown at self (use oop equality, since the
2936 // target object might exit)
2937 if (java_thread == thread->threadObj()) {
2938 THROW_OOP(java_throwable);
2939 } else {
2940 // Enques a VM_Operation to stop all threads and then deliver the exception...
2941 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2942 }
2943 }
2944 else {
2945 // Either:
2946 // - target thread has not been started before being stopped, or
2947 // - target thread already terminated
2948 // We could read the threadStatus to determine which case it is
2949 // but that is overkill as it doesn't matter. We must set the
2950 // stillborn flag for the first case, and if the thread has already
2951 // exited setting this flag has no affect
2952 java_lang_Thread::set_stillborn(java_thread);
2953 }
2954 JVM_END
2957 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2958 JVMWrapper("JVM_IsThreadAlive");
2960 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2961 return java_lang_Thread::is_alive(thread_oop);
2962 JVM_END
2965 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2966 JVMWrapper("JVM_SuspendThread");
2967 oop java_thread = JNIHandles::resolve_non_null(jthread);
2968 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2970 if (receiver != NULL) {
2971 // thread has run and has not exited (still on threads list)
2973 {
2974 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2975 if (receiver->is_external_suspend()) {
2976 // Don't allow nested external suspend requests. We can't return
2977 // an error from this interface so just ignore the problem.
2978 return;
2979 }
2980 if (receiver->is_exiting()) { // thread is in the process of exiting
2981 return;
2982 }
2983 receiver->set_external_suspend();
2984 }
2986 // java_suspend() will catch threads in the process of exiting
2987 // and will ignore them.
2988 receiver->java_suspend();
2990 // It would be nice to have the following assertion in all the
2991 // time, but it is possible for a racing resume request to have
2992 // resumed this thread right after we suspended it. Temporarily
2993 // enable this assertion if you are chasing a different kind of
2994 // bug.
2995 //
2996 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2997 // receiver->is_being_ext_suspended(), "thread is not suspended");
2998 }
2999 JVM_END
3002 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
3003 JVMWrapper("JVM_ResumeThread");
3004 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
3005 // We need to *always* get the threads lock here, since this operation cannot be allowed during
3006 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
3007 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
3008 // looks at it.
3009 MutexLocker ml(Threads_lock);
3010 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3011 if (thr != NULL) {
3012 // the thread has run and is not in the process of exiting
3013 thr->java_resume();
3014 }
3015 JVM_END
3018 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3019 JVMWrapper("JVM_SetThreadPriority");
3020 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3021 MutexLocker ml(Threads_lock);
3022 oop java_thread = JNIHandles::resolve_non_null(jthread);
3023 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3024 JavaThread* thr = java_lang_Thread::thread(java_thread);
3025 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
3026 Thread::set_priority(thr, (ThreadPriority)prio);
3027 }
3028 JVM_END
3031 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3032 JVMWrapper("JVM_Yield");
3033 if (os::dont_yield()) return;
3034 #ifndef USDT2
3035 HS_DTRACE_PROBE0(hotspot, thread__yield);
3036 #else /* USDT2 */
3037 HOTSPOT_THREAD_YIELD();
3038 #endif /* USDT2 */
3039 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
3040 // Critical for similar threading behaviour
3041 if (ConvertYieldToSleep) {
3042 os::sleep(thread, MinSleepInterval, false);
3043 } else {
3044 os::yield();
3045 }
3046 JVM_END
3049 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3050 JVMWrapper("JVM_Sleep");
3052 if (millis < 0) {
3053 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3054 }
3056 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3057 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3058 }
3060 // Save current thread state and restore it at the end of this block.
3061 // And set new thread state to SLEEPING.
3062 JavaThreadSleepState jtss(thread);
3064 #ifndef USDT2
3065 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
3066 #else /* USDT2 */
3067 HOTSPOT_THREAD_SLEEP_BEGIN(
3068 millis);
3069 #endif /* USDT2 */
3071 if (millis == 0) {
3072 // When ConvertSleepToYield is on, this matches the classic VM implementation of
3073 // JVM_Sleep. Critical for similar threading behaviour (Win32)
3074 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3075 // for SOLARIS
3076 if (ConvertSleepToYield) {
3077 os::yield();
3078 } else {
3079 ThreadState old_state = thread->osthread()->get_state();
3080 thread->osthread()->set_state(SLEEPING);
3081 os::sleep(thread, MinSleepInterval, false);
3082 thread->osthread()->set_state(old_state);
3083 }
3084 } else {
3085 ThreadState old_state = thread->osthread()->get_state();
3086 thread->osthread()->set_state(SLEEPING);
3087 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3088 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3089 // us while we were sleeping. We do not overwrite those.
3090 if (!HAS_PENDING_EXCEPTION) {
3091 #ifndef USDT2
3092 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
3093 #else /* USDT2 */
3094 HOTSPOT_THREAD_SLEEP_END(
3095 1);
3096 #endif /* USDT2 */
3097 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3098 // to properly restore the thread state. That's likely wrong.
3099 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3100 }
3101 }
3102 thread->osthread()->set_state(old_state);
3103 }
3104 #ifndef USDT2
3105 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
3106 #else /* USDT2 */
3107 HOTSPOT_THREAD_SLEEP_END(
3108 0);
3109 #endif /* USDT2 */
3110 JVM_END
3112 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3113 JVMWrapper("JVM_CurrentThread");
3114 oop jthread = thread->threadObj();
3115 assert (thread != NULL, "no current thread!");
3116 return JNIHandles::make_local(env, jthread);
3117 JVM_END
3120 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3121 JVMWrapper("JVM_CountStackFrames");
3123 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3124 oop java_thread = JNIHandles::resolve_non_null(jthread);
3125 bool throw_illegal_thread_state = false;
3126 int count = 0;
3128 {
3129 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3130 // We need to re-resolve the java_thread, since a GC might have happened during the
3131 // acquire of the lock
3132 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3134 if (thr == NULL) {
3135 // do nothing
3136 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3137 // Check whether this java thread has been suspended already. If not, throws
3138 // IllegalThreadStateException. We defer to throw that exception until
3139 // Threads_lock is released since loading exception class has to leave VM.
3140 // The correct way to test a thread is actually suspended is
3141 // wait_for_ext_suspend_completion(), but we can't call that while holding
3142 // the Threads_lock. The above tests are sufficient for our purposes
3143 // provided the walkability of the stack is stable - which it isn't
3144 // 100% but close enough for most practical purposes.
3145 throw_illegal_thread_state = true;
3146 } else {
3147 // Count all java activation, i.e., number of vframes
3148 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3149 // Native frames are not counted
3150 if (!vfst.method()->is_native()) count++;
3151 }
3152 }
3153 }
3155 if (throw_illegal_thread_state) {
3156 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3157 "this thread is not suspended");
3158 }
3159 return count;
3160 JVM_END
3162 // Consider: A better way to implement JVM_Interrupt() is to acquire
3163 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3164 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3165 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3166 // outside the critical section. Threads_lock is hot so we want to minimize
3167 // the hold-time. A cleaner interface would be to decompose interrupt into
3168 // two steps. The 1st phase, performed under Threads_lock, would return
3169 // a closure that'd be invoked after Threads_lock was dropped.
3170 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3171 // admit spurious wakeups.
3173 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3174 JVMWrapper("JVM_Interrupt");
3176 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3177 oop java_thread = JNIHandles::resolve_non_null(jthread);
3178 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3179 // We need to re-resolve the java_thread, since a GC might have happened during the
3180 // acquire of the lock
3181 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3182 if (thr != NULL) {
3183 Thread::interrupt(thr);
3184 }
3185 JVM_END
3188 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3189 JVMWrapper("JVM_IsInterrupted");
3191 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3192 oop java_thread = JNIHandles::resolve_non_null(jthread);
3193 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3194 // We need to re-resolve the java_thread, since a GC might have happened during the
3195 // acquire of the lock
3196 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3197 if (thr == NULL) {
3198 return JNI_FALSE;
3199 } else {
3200 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3201 }
3202 JVM_END
3205 // Return true iff the current thread has locked the object passed in
3207 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3208 JVMWrapper("JVM_HoldsLock");
3209 assert(THREAD->is_Java_thread(), "sanity check");
3210 if (obj == NULL) {
3211 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3212 }
3213 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3214 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3215 JVM_END
3218 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3219 JVMWrapper("JVM_DumpAllStacks");
3220 VM_PrintThreads op;
3221 VMThread::execute(&op);
3222 if (JvmtiExport::should_post_data_dump()) {
3223 JvmtiExport::post_data_dump();
3224 }
3225 JVM_END
3227 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3228 JVMWrapper("JVM_SetNativeThreadName");
3229 ResourceMark rm(THREAD);
3230 oop java_thread = JNIHandles::resolve_non_null(jthread);
3231 JavaThread* thr = java_lang_Thread::thread(java_thread);
3232 // Thread naming only supported for the current thread, doesn't work for
3233 // target threads.
3234 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3235 // we don't set the name of an attached thread to avoid stepping
3236 // on other programs
3237 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3238 os::set_native_thread_name(thread_name);
3239 }
3240 JVM_END
3242 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3244 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3245 assert(jthread->is_Java_thread(), "must be a Java thread");
3246 if (jthread->privileged_stack_top() == NULL) return false;
3247 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3248 oop loader = jthread->privileged_stack_top()->class_loader();
3249 if (loader == NULL) return true;
3250 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3251 if (trusted) return true;
3252 }
3253 return false;
3254 }
3256 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3257 JVMWrapper("JVM_CurrentLoadedClass");
3258 ResourceMark rm(THREAD);
3260 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3261 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3262 bool trusted = is_trusted_frame(thread, &vfst);
3263 if (trusted) return NULL;
3265 Method* m = vfst.method();
3266 if (!m->is_native()) {
3267 InstanceKlass* holder = m->method_holder();
3268 oop loader = holder->class_loader();
3269 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3270 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3271 }
3272 }
3273 }
3274 return NULL;
3275 JVM_END
3278 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3279 JVMWrapper("JVM_CurrentClassLoader");
3280 ResourceMark rm(THREAD);
3282 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3284 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3285 bool trusted = is_trusted_frame(thread, &vfst);
3286 if (trusted) return NULL;
3288 Method* m = vfst.method();
3289 if (!m->is_native()) {
3290 InstanceKlass* holder = m->method_holder();
3291 assert(holder->is_klass(), "just checking");
3292 oop loader = holder->class_loader();
3293 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3294 return JNIHandles::make_local(env, loader);
3295 }
3296 }
3297 }
3298 return NULL;
3299 JVM_END
3302 // Utility object for collecting method holders walking down the stack
3303 class KlassLink: public ResourceObj {
3304 public:
3305 KlassHandle klass;
3306 KlassLink* next;
3308 KlassLink(KlassHandle k) { klass = k; next = NULL; }
3309 };
3312 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3313 JVMWrapper("JVM_GetClassContext");
3314 ResourceMark rm(THREAD);
3315 JvmtiVMObjectAllocEventCollector oam;
3316 // Collect linked list of (handles to) method holders
3317 KlassLink* first = NULL;
3318 KlassLink* last = NULL;
3319 int depth = 0;
3320 vframeStream vfst(thread);
3322 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3323 // This must only be called from SecurityManager.getClassContext
3324 Method* m = vfst.method();
3325 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3326 m->name() == vmSymbols::getClassContext_name() &&
3327 m->signature() == vmSymbols::void_class_array_signature())) {
3328 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3329 }
3330 }
3332 // Collect method holders
3333 for (; !vfst.at_end(); vfst.security_next()) {
3334 Method* m = vfst.method();
3335 // Native frames are not returned
3336 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3337 Klass* holder = m->method_holder();
3338 assert(holder->is_klass(), "just checking");
3339 depth++;
3340 KlassLink* l = new KlassLink(KlassHandle(thread, holder));
3341 if (first == NULL) {
3342 first = last = l;
3343 } else {
3344 last->next = l;
3345 last = l;
3346 }
3347 }
3348 }
3350 // Create result array of type [Ljava/lang/Class;
3351 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL);
3352 // Fill in mirrors corresponding to method holders
3353 int index = 0;
3354 while (first != NULL) {
3355 result->obj_at_put(index++, first->klass()->java_mirror());
3356 first = first->next;
3357 }
3358 assert(index == depth, "just checking");
3360 return (jobjectArray) JNIHandles::make_local(env, result);
3361 JVM_END
3364 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3365 JVMWrapper("JVM_ClassDepth");
3366 ResourceMark rm(THREAD);
3367 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3368 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3370 const char* str = java_lang_String::as_utf8_string(class_name_str());
3371 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3372 if (class_name_sym == NULL) {
3373 return -1;
3374 }
3376 int depth = 0;
3378 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3379 if (!vfst.method()->is_native()) {
3380 InstanceKlass* holder = vfst.method()->method_holder();
3381 assert(holder->is_klass(), "just checking");
3382 if (holder->name() == class_name_sym) {
3383 return depth;
3384 }
3385 depth++;
3386 }
3387 }
3388 return -1;
3389 JVM_END
3392 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3393 JVMWrapper("JVM_ClassLoaderDepth");
3394 ResourceMark rm(THREAD);
3395 int depth = 0;
3396 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3397 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3398 bool trusted = is_trusted_frame(thread, &vfst);
3399 if (trusted) return -1;
3401 Method* m = vfst.method();
3402 if (!m->is_native()) {
3403 InstanceKlass* holder = m->method_holder();
3404 assert(holder->is_klass(), "just checking");
3405 oop loader = holder->class_loader();
3406 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3407 return depth;
3408 }
3409 depth++;
3410 }
3411 }
3412 return -1;
3413 JVM_END
3416 // java.lang.Package ////////////////////////////////////////////////////////////////
3419 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3420 JVMWrapper("JVM_GetSystemPackage");
3421 ResourceMark rm(THREAD);
3422 JvmtiVMObjectAllocEventCollector oam;
3423 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3424 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3425 return (jstring) JNIHandles::make_local(result);
3426 JVM_END
3429 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3430 JVMWrapper("JVM_GetSystemPackages");
3431 JvmtiVMObjectAllocEventCollector oam;
3432 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3433 return (jobjectArray) JNIHandles::make_local(result);
3434 JVM_END
3437 // ObjectInputStream ///////////////////////////////////////////////////////////////
3439 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3440 if (current_class == NULL) {
3441 return true;
3442 }
3443 if ((current_class == field_class) || access.is_public()) {
3444 return true;
3445 }
3447 if (access.is_protected()) {
3448 // See if current_class is a subclass of field_class
3449 if (current_class->is_subclass_of(field_class)) {
3450 return true;
3451 }
3452 }
3454 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3455 }
3458 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3459 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3460 JVMWrapper("JVM_AllocateNewObject");
3461 JvmtiVMObjectAllocEventCollector oam;
3462 // Receiver is not used
3463 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3464 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3466 // Cannot instantiate primitive types
3467 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3468 ResourceMark rm(THREAD);
3469 THROW_0(vmSymbols::java_lang_InvalidClassException());
3470 }
3472 // Arrays not allowed here, must use JVM_AllocateNewArray
3473 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3474 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3475 ResourceMark rm(THREAD);
3476 THROW_0(vmSymbols::java_lang_InvalidClassException());
3477 }
3479 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3480 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3482 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3484 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3485 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3487 // Make sure klass is initialized, since we are about to instantiate one of them.
3488 curr_klass->initialize(CHECK_NULL);
3490 methodHandle m (THREAD,
3491 init_klass->find_method(vmSymbols::object_initializer_name(),
3492 vmSymbols::void_method_signature()));
3493 if (m.is_null()) {
3494 ResourceMark rm(THREAD);
3495 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3496 Method::name_and_sig_as_C_string(init_klass(),
3497 vmSymbols::object_initializer_name(),
3498 vmSymbols::void_method_signature()));
3499 }
3501 if (curr_klass == init_klass && !m->is_public()) {
3502 // Calling the constructor for class 'curr_klass'.
3503 // Only allow calls to a public no-arg constructor.
3504 // This path corresponds to creating an Externalizable object.
3505 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3506 }
3508 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3509 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3510 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3511 }
3513 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3514 // Call constructor m. This might call a constructor higher up in the hierachy
3515 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3517 return JNIHandles::make_local(obj());
3518 JVM_END
3521 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3522 JVMWrapper("JVM_AllocateNewArray");
3523 JvmtiVMObjectAllocEventCollector oam;
3524 oop mirror = JNIHandles::resolve_non_null(currClass);
3526 if (java_lang_Class::is_primitive(mirror)) {
3527 THROW_0(vmSymbols::java_lang_InvalidClassException());
3528 }
3529 Klass* k = java_lang_Class::as_Klass(mirror);
3530 oop result;
3532 if (k->oop_is_typeArray()) {
3533 // typeArray
3534 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3535 } else if (k->oop_is_objArray()) {
3536 // objArray
3537 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3538 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3539 result = oak->allocate(length, CHECK_NULL);
3540 } else {
3541 THROW_0(vmSymbols::java_lang_InvalidClassException());
3542 }
3543 return JNIHandles::make_local(env, result);
3544 JVM_END
3547 // Return the first non-null class loader up the execution stack, or null
3548 // if only code from the null class loader is on the stack.
3550 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3551 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3552 // UseNewReflection
3553 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3554 oop loader = vfst.method()->method_holder()->class_loader();
3555 if (loader != NULL) {
3556 return JNIHandles::make_local(env, loader);
3557 }
3558 }
3559 return NULL;
3560 JVM_END
3563 // Load a class relative to the most recent class on the stack with a non-null
3564 // classloader.
3565 // This function has been deprecated and should not be considered part of the
3566 // specified JVM interface.
3568 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3569 jclass currClass, jstring currClassName))
3570 JVMWrapper("JVM_LoadClass0");
3571 // Receiver is not used
3572 ResourceMark rm(THREAD);
3574 // Class name argument is not guaranteed to be in internal format
3575 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3576 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3578 const char* str = java_lang_String::as_utf8_string(string());
3580 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3581 // It's impossible to create this class; the name cannot fit
3582 // into the constant pool.
3583 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3584 }
3586 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3587 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3588 // Find the most recent class on the stack with a non-null classloader
3589 oop loader = NULL;
3590 oop protection_domain = NULL;
3591 if (curr_klass.is_null()) {
3592 for (vframeStream vfst(thread);
3593 !vfst.at_end() && loader == NULL;
3594 vfst.next()) {
3595 if (!vfst.method()->is_native()) {
3596 InstanceKlass* holder = vfst.method()->method_holder();
3597 loader = holder->class_loader();
3598 protection_domain = holder->protection_domain();
3599 }
3600 }
3601 } else {
3602 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3603 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3604 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3605 }
3606 Handle h_loader(THREAD, loader);
3607 Handle h_prot (THREAD, protection_domain);
3608 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3609 false, thread);
3610 if (TraceClassResolution && result != NULL) {
3611 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3612 }
3613 return result;
3614 JVM_END
3617 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3620 // resolve array handle and check arguments
3621 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3622 if (arr == NULL) {
3623 THROW_0(vmSymbols::java_lang_NullPointerException());
3624 }
3625 oop a = JNIHandles::resolve_non_null(arr);
3626 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3627 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3628 }
3629 return arrayOop(a);
3630 }
3633 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3634 JVMWrapper("JVM_GetArrayLength");
3635 arrayOop a = check_array(env, arr, false, CHECK_0);
3636 return a->length();
3637 JVM_END
3640 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3641 JVMWrapper("JVM_Array_Get");
3642 JvmtiVMObjectAllocEventCollector oam;
3643 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3644 jvalue value;
3645 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3646 oop box = Reflection::box(&value, type, CHECK_NULL);
3647 return JNIHandles::make_local(env, box);
3648 JVM_END
3651 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3652 JVMWrapper("JVM_GetPrimitiveArrayElement");
3653 jvalue value;
3654 value.i = 0; // to initialize value before getting used in CHECK
3655 arrayOop a = check_array(env, arr, true, CHECK_(value));
3656 assert(a->is_typeArray(), "just checking");
3657 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3658 BasicType wide_type = (BasicType) wCode;
3659 if (type != wide_type) {
3660 Reflection::widen(&value, type, wide_type, CHECK_(value));
3661 }
3662 return value;
3663 JVM_END
3666 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3667 JVMWrapper("JVM_SetArrayElement");
3668 arrayOop a = check_array(env, arr, false, CHECK);
3669 oop box = JNIHandles::resolve(val);
3670 jvalue value;
3671 value.i = 0; // to initialize value before getting used in CHECK
3672 BasicType value_type;
3673 if (a->is_objArray()) {
3674 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3675 value_type = Reflection::unbox_for_regular_object(box, &value);
3676 } else {
3677 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3678 }
3679 Reflection::array_set(&value, a, index, value_type, CHECK);
3680 JVM_END
3683 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3684 JVMWrapper("JVM_SetPrimitiveArrayElement");
3685 arrayOop a = check_array(env, arr, true, CHECK);
3686 assert(a->is_typeArray(), "just checking");
3687 BasicType value_type = (BasicType) vCode;
3688 Reflection::array_set(&v, a, index, value_type, CHECK);
3689 JVM_END
3692 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3693 JVMWrapper("JVM_NewArray");
3694 JvmtiVMObjectAllocEventCollector oam;
3695 oop element_mirror = JNIHandles::resolve(eltClass);
3696 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3697 return JNIHandles::make_local(env, result);
3698 JVM_END
3701 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3702 JVMWrapper("JVM_NewMultiArray");
3703 JvmtiVMObjectAllocEventCollector oam;
3704 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3705 oop element_mirror = JNIHandles::resolve(eltClass);
3706 assert(dim_array->is_typeArray(), "just checking");
3707 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3708 return JNIHandles::make_local(env, result);
3709 JVM_END
3712 // Networking library support ////////////////////////////////////////////////////////////////////
3714 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3715 JVMWrapper("JVM_InitializeSocketLibrary");
3716 return 0;
3717 JVM_END
3720 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3721 JVMWrapper("JVM_Socket");
3722 return os::socket(domain, type, protocol);
3723 JVM_END
3726 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3727 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3728 //%note jvm_r6
3729 return os::socket_close(fd);
3730 JVM_END
3733 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3734 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3735 //%note jvm_r6
3736 return os::socket_shutdown(fd, howto);
3737 JVM_END
3740 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3741 JVMWrapper2("JVM_Recv (0x%x)", fd);
3742 //%note jvm_r6
3743 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3744 JVM_END
3747 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3748 JVMWrapper2("JVM_Send (0x%x)", fd);
3749 //%note jvm_r6
3750 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3751 JVM_END
3754 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3755 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3756 //%note jvm_r6
3757 return os::timeout(fd, timeout);
3758 JVM_END
3761 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3762 JVMWrapper2("JVM_Listen (0x%x)", fd);
3763 //%note jvm_r6
3764 return os::listen(fd, count);
3765 JVM_END
3768 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3769 JVMWrapper2("JVM_Connect (0x%x)", fd);
3770 //%note jvm_r6
3771 return os::connect(fd, him, (socklen_t)len);
3772 JVM_END
3775 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3776 JVMWrapper2("JVM_Bind (0x%x)", fd);
3777 //%note jvm_r6
3778 return os::bind(fd, him, (socklen_t)len);
3779 JVM_END
3782 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3783 JVMWrapper2("JVM_Accept (0x%x)", fd);
3784 //%note jvm_r6
3785 socklen_t socklen = (socklen_t)(*len);
3786 jint result = os::accept(fd, him, &socklen);
3787 *len = (jint)socklen;
3788 return result;
3789 JVM_END
3792 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3793 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3794 //%note jvm_r6
3795 socklen_t socklen = (socklen_t)(*fromlen);
3796 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3797 *fromlen = (int)socklen;
3798 return result;
3799 JVM_END
3802 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3803 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3804 //%note jvm_r6
3805 socklen_t socklen = (socklen_t)(*len);
3806 jint result = os::get_sock_name(fd, him, &socklen);
3807 *len = (int)socklen;
3808 return result;
3809 JVM_END
3812 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3813 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3814 //%note jvm_r6
3815 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3816 JVM_END
3819 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3820 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3821 //%note jvm_r6
3822 return os::socket_available(fd, pbytes);
3823 JVM_END
3826 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3827 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3828 //%note jvm_r6
3829 socklen_t socklen = (socklen_t)(*optlen);
3830 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3831 *optlen = (int)socklen;
3832 return result;
3833 JVM_END
3836 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3837 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3838 //%note jvm_r6
3839 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3840 JVM_END
3843 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3844 JVMWrapper("JVM_GetHostName");
3845 return os::get_host_name(name, namelen);
3846 JVM_END
3849 // Library support ///////////////////////////////////////////////////////////////////////////
3851 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3852 //%note jvm_ct
3853 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3854 char ebuf[1024];
3855 void *load_result;
3856 {
3857 ThreadToNativeFromVM ttnfvm(thread);
3858 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3859 }
3860 if (load_result == NULL) {
3861 char msg[1024];
3862 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3863 // Since 'ebuf' may contain a string encoded using
3864 // platform encoding scheme, we need to pass
3865 // Exceptions::unsafe_to_utf8 to the new_exception method
3866 // as the last argument. See bug 6367357.
3867 Handle h_exception =
3868 Exceptions::new_exception(thread,
3869 vmSymbols::java_lang_UnsatisfiedLinkError(),
3870 msg, Exceptions::unsafe_to_utf8);
3872 THROW_HANDLE_0(h_exception);
3873 }
3874 return load_result;
3875 JVM_END
3878 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3879 JVMWrapper("JVM_UnloadLibrary");
3880 os::dll_unload(handle);
3881 JVM_END
3884 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3885 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3886 return os::dll_lookup(handle, name);
3887 JVM_END
3890 // Floating point support ////////////////////////////////////////////////////////////////////
3892 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3893 JVMWrapper("JVM_IsNaN");
3894 return g_isnan(a);
3895 JVM_END
3898 // JNI version ///////////////////////////////////////////////////////////////////////////////
3900 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3901 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3902 return Threads::is_supported_jni_version_including_1_1(version);
3903 JVM_END
3906 // String support ///////////////////////////////////////////////////////////////////////////
3908 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3909 JVMWrapper("JVM_InternString");
3910 JvmtiVMObjectAllocEventCollector oam;
3911 if (str == NULL) return NULL;
3912 oop string = JNIHandles::resolve_non_null(str);
3913 oop result = StringTable::intern(string, CHECK_NULL);
3914 return (jstring) JNIHandles::make_local(env, result);
3915 JVM_END
3918 // Raw monitor support //////////////////////////////////////////////////////////////////////
3920 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3921 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3922 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3923 // that only works with java threads.
3926 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3927 VM_Exit::block_if_vm_exited();
3928 JVMWrapper("JVM_RawMonitorCreate");
3929 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3930 }
3933 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3934 VM_Exit::block_if_vm_exited();
3935 JVMWrapper("JVM_RawMonitorDestroy");
3936 delete ((Mutex*) mon);
3937 }
3940 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3941 VM_Exit::block_if_vm_exited();
3942 JVMWrapper("JVM_RawMonitorEnter");
3943 ((Mutex*) mon)->jvm_raw_lock();
3944 return 0;
3945 }
3948 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3949 VM_Exit::block_if_vm_exited();
3950 JVMWrapper("JVM_RawMonitorExit");
3951 ((Mutex*) mon)->jvm_raw_unlock();
3952 }
3955 // Support for Serialization
3957 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3958 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3959 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3960 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3962 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3963 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3964 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3965 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3968 void initialize_converter_functions() {
3969 if (JDK_Version::is_gte_jdk14x_version()) {
3970 // These functions only exist for compatibility with 1.3.1 and earlier
3971 return;
3972 }
3974 // called from universe_post_init()
3975 assert(
3976 int_bits_to_float_fn == NULL &&
3977 long_bits_to_double_fn == NULL &&
3978 float_to_int_bits_fn == NULL &&
3979 double_to_long_bits_fn == NULL ,
3980 "initialization done twice"
3981 );
3982 // initialize
3983 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3984 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3985 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3986 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3987 // verify
3988 assert(
3989 int_bits_to_float_fn != NULL &&
3990 long_bits_to_double_fn != NULL &&
3991 float_to_int_bits_fn != NULL &&
3992 double_to_long_bits_fn != NULL ,
3993 "initialization failed"
3994 );
3995 }
3998 // Serialization
3999 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
4000 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
4001 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
4003 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
4004 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
4005 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
4006 oop o = JNIHandles::resolve(obj);
4008 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
4009 THROW(vmSymbols::java_lang_NullPointerException());
4010 }
4012 jsize nfids = fids->length();
4013 if (nfids == 0) return;
4015 if (tcodes->length() < nfids) {
4016 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
4017 }
4019 jsize off = 0;
4020 /* loop through fields, setting values */
4021 for (jsize i = 0; i < nfids; i++) {
4022 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
4023 int field_offset;
4024 if (fid != NULL) {
4025 // NULL is a legal value for fid, but retrieving the field offset
4026 // trigger assertion in that case
4027 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4028 }
4030 switch (tcodes->char_at(i)) {
4031 case 'Z':
4032 if (fid != NULL) {
4033 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
4034 o->bool_field_put(field_offset, val);
4035 }
4036 off++;
4037 break;
4039 case 'B':
4040 if (fid != NULL) {
4041 o->byte_field_put(field_offset, dbuf->byte_at(off));
4042 }
4043 off++;
4044 break;
4046 case 'C':
4047 if (fid != NULL) {
4048 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
4049 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
4050 o->char_field_put(field_offset, val);
4051 }
4052 off += 2;
4053 break;
4055 case 'S':
4056 if (fid != NULL) {
4057 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
4058 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
4059 o->short_field_put(field_offset, val);
4060 }
4061 off += 2;
4062 break;
4064 case 'I':
4065 if (fid != NULL) {
4066 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
4067 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
4068 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
4069 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
4070 o->int_field_put(field_offset, ival);
4071 }
4072 off += 4;
4073 break;
4075 case 'F':
4076 if (fid != NULL) {
4077 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
4078 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
4079 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
4080 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
4081 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
4082 o->float_field_put(field_offset, fval);
4083 }
4084 off += 4;
4085 break;
4087 case 'J':
4088 if (fid != NULL) {
4089 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
4090 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
4091 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
4092 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
4093 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
4094 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
4095 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
4096 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
4097 o->long_field_put(field_offset, lval);
4098 }
4099 off += 8;
4100 break;
4102 case 'D':
4103 if (fid != NULL) {
4104 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
4105 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
4106 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
4107 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
4108 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
4109 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
4110 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
4111 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
4112 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
4113 o->double_field_put(field_offset, dval);
4114 }
4115 off += 8;
4116 break;
4118 default:
4119 // Illegal typecode
4120 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4121 }
4122 }
4123 JVM_END
4126 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
4127 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
4128 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
4130 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
4131 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
4132 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
4133 oop o = JNIHandles::resolve(obj);
4135 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
4136 THROW(vmSymbols::java_lang_NullPointerException());
4137 }
4139 jsize nfids = fids->length();
4140 if (nfids == 0) return;
4142 if (tcodes->length() < nfids) {
4143 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
4144 }
4146 /* loop through fields, fetching values */
4147 jsize off = 0;
4148 for (jsize i = 0; i < nfids; i++) {
4149 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
4150 if (fid == NULL) {
4151 THROW(vmSymbols::java_lang_NullPointerException());
4152 }
4153 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4155 switch (tcodes->char_at(i)) {
4156 case 'Z':
4157 {
4158 jboolean val = o->bool_field(field_offset);
4159 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
4160 }
4161 break;
4163 case 'B':
4164 dbuf->byte_at_put(off++, o->byte_field(field_offset));
4165 break;
4167 case 'C':
4168 {
4169 jchar val = o->char_field(field_offset);
4170 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4171 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4172 }
4173 break;
4175 case 'S':
4176 {
4177 jshort val = o->short_field(field_offset);
4178 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4179 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4180 }
4181 break;
4183 case 'I':
4184 {
4185 jint val = o->int_field(field_offset);
4186 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4187 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4188 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4189 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4190 }
4191 break;
4193 case 'F':
4194 {
4195 jfloat fval = o->float_field(field_offset);
4196 jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
4197 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
4198 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
4199 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF);
4200 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF);
4201 }
4202 break;
4204 case 'J':
4205 {
4206 jlong val = o->long_field(field_offset);
4207 dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
4208 dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
4209 dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
4210 dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
4211 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4212 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4213 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4214 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4215 }
4216 break;
4218 case 'D':
4219 {
4220 jdouble dval = o->double_field(field_offset);
4221 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
4222 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
4223 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
4224 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
4225 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
4226 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
4227 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
4228 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF);
4229 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF);
4230 }
4231 break;
4233 default:
4234 // Illegal typecode
4235 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4236 }
4237 }
4238 JVM_END
4241 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
4243 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
4244 // Security Note:
4245 // The Java level wrapper will perform the necessary security check allowing
4246 // us to pass the NULL as the initiating class loader.
4247 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
4249 KlassHandle klass_handle(THREAD, klass);
4250 // Check if we should initialize the class
4251 if (init && klass_handle->oop_is_instance()) {
4252 klass_handle->initialize(CHECK_NULL);
4253 }
4254 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4255 }
4258 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4260 #ifndef PRODUCT
4262 extern "C" {
4263 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4264 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4265 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4266 }
4268 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4269 JVMWrapper("JVM_AccessBoolVMFlag");
4270 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
4271 JVM_END
4273 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4274 JVMWrapper("JVM_AccessVMIntFlag");
4275 intx v;
4276 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
4277 *value = (jint)v;
4278 return result;
4279 JVM_END
4282 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4283 JVMWrapper("JVM_VMBreakPoint");
4284 oop the_obj = JNIHandles::resolve(obj);
4285 BREAKPOINT;
4286 JVM_END
4289 #endif
4292 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4294 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4295 JVMWrapper("JVM_InvokeMethod");
4296 Handle method_handle;
4297 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4298 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4299 Handle receiver(THREAD, JNIHandles::resolve(obj));
4300 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4301 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4302 jobject res = JNIHandles::make_local(env, result);
4303 if (JvmtiExport::should_post_vm_object_alloc()) {
4304 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4305 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4306 if (java_lang_Class::is_primitive(ret_type)) {
4307 // Only for primitive type vm allocates memory for java object.
4308 // See box() method.
4309 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4310 }
4311 }
4312 return res;
4313 } else {
4314 THROW_0(vmSymbols::java_lang_StackOverflowError());
4315 }
4316 JVM_END
4319 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4320 JVMWrapper("JVM_NewInstanceFromConstructor");
4321 oop constructor_mirror = JNIHandles::resolve(c);
4322 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4323 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4324 jobject res = JNIHandles::make_local(env, result);
4325 if (JvmtiExport::should_post_vm_object_alloc()) {
4326 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4327 }
4328 return res;
4329 JVM_END
4331 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4333 JVM_LEAF(jboolean, JVM_SupportsCX8())
4334 JVMWrapper("JVM_SupportsCX8");
4335 return VM_Version::supports_cx8();
4336 JVM_END
4339 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4340 JVMWrapper("JVM_CX8Field");
4341 jlong res;
4342 oop o = JNIHandles::resolve(obj);
4343 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4344 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4346 assert(VM_Version::supports_cx8(), "cx8 not supported");
4347 res = Atomic::cmpxchg(newVal, addr, oldVal);
4349 return res == oldVal;
4350 JVM_END
4352 // DTrace ///////////////////////////////////////////////////////////////////
4354 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4355 JVMWrapper("JVM_DTraceGetVersion");
4356 return (jint)JVM_TRACING_DTRACE_VERSION;
4357 JVM_END
4359 JVM_ENTRY(jlong,JVM_DTraceActivate(
4360 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4361 JVM_DTraceProvider* providers))
4362 JVMWrapper("JVM_DTraceActivate");
4363 return DTraceJSDT::activate(
4364 version, module_name, providers_count, providers, CHECK_0);
4365 JVM_END
4367 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4368 JVMWrapper("JVM_DTraceIsProbeEnabled");
4369 return DTraceJSDT::is_probe_enabled(method);
4370 JVM_END
4372 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4373 JVMWrapper("JVM_DTraceDispose");
4374 DTraceJSDT::dispose(handle);
4375 JVM_END
4377 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4378 JVMWrapper("JVM_DTraceIsSupported");
4379 return DTraceJSDT::is_supported();
4380 JVM_END
4382 // Returns an array of all live Thread objects (VM internal JavaThreads,
4383 // jvmti agent threads, and JNI attaching threads are skipped)
4384 // See CR 6404306 regarding JNI attaching threads
4385 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4386 ResourceMark rm(THREAD);
4387 ThreadsListEnumerator tle(THREAD, false, false);
4388 JvmtiVMObjectAllocEventCollector oam;
4390 int num_threads = tle.num_threads();
4391 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4392 objArrayHandle threads_ah(THREAD, r);
4394 for (int i = 0; i < num_threads; i++) {
4395 Handle h = tle.get_threadObj(i);
4396 threads_ah->obj_at_put(i, h());
4397 }
4399 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4400 JVM_END
4403 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4404 // Return StackTraceElement[][], each element is the stack trace of a thread in
4405 // the corresponding entry in the given threads array
4406 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4407 JVMWrapper("JVM_DumpThreads");
4408 JvmtiVMObjectAllocEventCollector oam;
4410 // Check if threads is null
4411 if (threads == NULL) {
4412 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4413 }
4415 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4416 objArrayHandle ah(THREAD, a);
4417 int num_threads = ah->length();
4418 // check if threads is non-empty array
4419 if (num_threads == 0) {
4420 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4421 }
4423 // check if threads is not an array of objects of Thread class
4424 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4425 if (k != SystemDictionary::Thread_klass()) {
4426 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4427 }
4429 ResourceMark rm(THREAD);
4431 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4432 for (int i = 0; i < num_threads; i++) {
4433 oop thread_obj = ah->obj_at(i);
4434 instanceHandle h(THREAD, (instanceOop) thread_obj);
4435 thread_handle_array->append(h);
4436 }
4438 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4439 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4441 JVM_END
4443 // JVM monitoring and management support
4444 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4445 return Management::get_jmm_interface(version);
4446 JVM_END
4448 // com.sun.tools.attach.VirtualMachine agent properties support
4449 //
4450 // Initialize the agent properties with the properties maintained in the VM
4451 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4452 JVMWrapper("JVM_InitAgentProperties");
4453 ResourceMark rm;
4455 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4457 PUTPROP(props, "sun.java.command", Arguments::java_command());
4458 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4459 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4460 return properties;
4461 JVM_END
4463 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4464 {
4465 JVMWrapper("JVM_GetEnclosingMethodInfo");
4466 JvmtiVMObjectAllocEventCollector oam;
4468 if (ofClass == NULL) {
4469 return NULL;
4470 }
4471 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4472 // Special handling for primitive objects
4473 if (java_lang_Class::is_primitive(mirror())) {
4474 return NULL;
4475 }
4476 Klass* k = java_lang_Class::as_Klass(mirror());
4477 if (!k->oop_is_instance()) {
4478 return NULL;
4479 }
4480 instanceKlassHandle ik_h(THREAD, k);
4481 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4482 if (encl_method_class_idx == 0) {
4483 return NULL;
4484 }
4485 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4486 objArrayHandle dest(THREAD, dest_o);
4487 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4488 dest->obj_at_put(0, enc_k->java_mirror());
4489 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4490 if (encl_method_method_idx != 0) {
4491 Symbol* sym = ik_h->constants()->symbol_at(
4492 extract_low_short_from_int(
4493 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4494 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4495 dest->obj_at_put(1, str());
4496 sym = ik_h->constants()->symbol_at(
4497 extract_high_short_from_int(
4498 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4499 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4500 dest->obj_at_put(2, str());
4501 }
4502 return (jobjectArray) JNIHandles::make_local(dest());
4503 }
4504 JVM_END
4506 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4507 jint javaThreadState))
4508 {
4509 // If new thread states are added in future JDK and VM versions,
4510 // this should check if the JDK version is compatible with thread
4511 // states supported by the VM. Return NULL if not compatible.
4512 //
4513 // This function must map the VM java_lang_Thread::ThreadStatus
4514 // to the Java thread state that the JDK supports.
4515 //
4517 typeArrayHandle values_h;
4518 switch (javaThreadState) {
4519 case JAVA_THREAD_STATE_NEW : {
4520 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4521 values_h = typeArrayHandle(THREAD, r);
4522 values_h->int_at_put(0, java_lang_Thread::NEW);
4523 break;
4524 }
4525 case JAVA_THREAD_STATE_RUNNABLE : {
4526 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4527 values_h = typeArrayHandle(THREAD, r);
4528 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4529 break;
4530 }
4531 case JAVA_THREAD_STATE_BLOCKED : {
4532 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4533 values_h = typeArrayHandle(THREAD, r);
4534 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4535 break;
4536 }
4537 case JAVA_THREAD_STATE_WAITING : {
4538 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4539 values_h = typeArrayHandle(THREAD, r);
4540 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4541 values_h->int_at_put(1, java_lang_Thread::PARKED);
4542 break;
4543 }
4544 case JAVA_THREAD_STATE_TIMED_WAITING : {
4545 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4546 values_h = typeArrayHandle(THREAD, r);
4547 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4548 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4549 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4550 break;
4551 }
4552 case JAVA_THREAD_STATE_TERMINATED : {
4553 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4554 values_h = typeArrayHandle(THREAD, r);
4555 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4556 break;
4557 }
4558 default:
4559 // Unknown state - probably incompatible JDK version
4560 return NULL;
4561 }
4563 return (jintArray) JNIHandles::make_local(env, values_h());
4564 }
4565 JVM_END
4568 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4569 jint javaThreadState,
4570 jintArray values))
4571 {
4572 // If new thread states are added in future JDK and VM versions,
4573 // this should check if the JDK version is compatible with thread
4574 // states supported by the VM. Return NULL if not compatible.
4575 //
4576 // This function must map the VM java_lang_Thread::ThreadStatus
4577 // to the Java thread state that the JDK supports.
4578 //
4580 ResourceMark rm;
4582 // Check if threads is null
4583 if (values == NULL) {
4584 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4585 }
4587 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4588 typeArrayHandle values_h(THREAD, v);
4590 objArrayHandle names_h;
4591 switch (javaThreadState) {
4592 case JAVA_THREAD_STATE_NEW : {
4593 assert(values_h->length() == 1 &&
4594 values_h->int_at(0) == java_lang_Thread::NEW,
4595 "Invalid threadStatus value");
4597 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4598 1, /* only 1 substate */
4599 CHECK_NULL);
4600 names_h = objArrayHandle(THREAD, r);
4601 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4602 names_h->obj_at_put(0, name());
4603 break;
4604 }
4605 case JAVA_THREAD_STATE_RUNNABLE : {
4606 assert(values_h->length() == 1 &&
4607 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4608 "Invalid threadStatus value");
4610 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4611 1, /* only 1 substate */
4612 CHECK_NULL);
4613 names_h = objArrayHandle(THREAD, r);
4614 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4615 names_h->obj_at_put(0, name());
4616 break;
4617 }
4618 case JAVA_THREAD_STATE_BLOCKED : {
4619 assert(values_h->length() == 1 &&
4620 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4621 "Invalid threadStatus value");
4623 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4624 1, /* only 1 substate */
4625 CHECK_NULL);
4626 names_h = objArrayHandle(THREAD, r);
4627 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4628 names_h->obj_at_put(0, name());
4629 break;
4630 }
4631 case JAVA_THREAD_STATE_WAITING : {
4632 assert(values_h->length() == 2 &&
4633 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4634 values_h->int_at(1) == java_lang_Thread::PARKED,
4635 "Invalid threadStatus value");
4636 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4637 2, /* number of substates */
4638 CHECK_NULL);
4639 names_h = objArrayHandle(THREAD, r);
4640 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4641 CHECK_NULL);
4642 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4643 CHECK_NULL);
4644 names_h->obj_at_put(0, name0());
4645 names_h->obj_at_put(1, name1());
4646 break;
4647 }
4648 case JAVA_THREAD_STATE_TIMED_WAITING : {
4649 assert(values_h->length() == 3 &&
4650 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4651 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4652 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4653 "Invalid threadStatus value");
4654 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4655 3, /* number of substates */
4656 CHECK_NULL);
4657 names_h = objArrayHandle(THREAD, r);
4658 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4659 CHECK_NULL);
4660 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4661 CHECK_NULL);
4662 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4663 CHECK_NULL);
4664 names_h->obj_at_put(0, name0());
4665 names_h->obj_at_put(1, name1());
4666 names_h->obj_at_put(2, name2());
4667 break;
4668 }
4669 case JAVA_THREAD_STATE_TERMINATED : {
4670 assert(values_h->length() == 1 &&
4671 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4672 "Invalid threadStatus value");
4673 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4674 1, /* only 1 substate */
4675 CHECK_NULL);
4676 names_h = objArrayHandle(THREAD, r);
4677 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4678 names_h->obj_at_put(0, name());
4679 break;
4680 }
4681 default:
4682 // Unknown state - probably incompatible JDK version
4683 return NULL;
4684 }
4685 return (jobjectArray) JNIHandles::make_local(env, names_h());
4686 }
4687 JVM_END
4689 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4690 {
4691 memset(info, 0, sizeof(info_size));
4693 info->jvm_version = Abstract_VM_Version::jvm_version();
4694 info->update_version = 0; /* 0 in HotSpot Express VM */
4695 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4697 // when we add a new capability in the jvm_version_info struct, we should also
4698 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4699 // counter defined in runtimeService.cpp.
4700 info->is_attachable = AttachListener::is_attach_supported();
4701 }
4702 JVM_END