Mercurial > hg > truffle
annotate src/share/vm/prims/jvm.cpp @ 5073:2db1ad9dd385
rename PiNode.value to PiNode.object and UnsafeCastNode.x to UnsafeCastNode.object
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Wed, 14 Mar 2012 16:57:18 +0100 |
parents | aa3d708d67c4 |
children | f7c4174b33ba |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 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 "memory/oopFactory.hpp" | |
34 #include "memory/universe.inline.hpp" | |
3938 | 35 #include "oops/fieldStreams.hpp" |
1972 | 36 #include "oops/instanceKlass.hpp" |
37 #include "oops/objArrayKlass.hpp" | |
38 #include "prims/jvm.h" | |
39 #include "prims/jvm_misc.hpp" | |
40 #include "prims/jvmtiExport.hpp" | |
41 #include "prims/jvmtiThreadState.hpp" | |
42 #include "prims/nativeLookup.hpp" | |
43 #include "prims/privilegedStack.hpp" | |
44 #include "runtime/arguments.hpp" | |
45 #include "runtime/dtraceJSDT.hpp" | |
46 #include "runtime/handles.inline.hpp" | |
47 #include "runtime/init.hpp" | |
48 #include "runtime/interfaceSupport.hpp" | |
49 #include "runtime/java.hpp" | |
50 #include "runtime/javaCalls.hpp" | |
51 #include "runtime/jfieldIDWorkaround.hpp" | |
52 #include "runtime/os.hpp" | |
53 #include "runtime/perfData.hpp" | |
54 #include "runtime/reflection.hpp" | |
55 #include "runtime/vframe.hpp" | |
56 #include "runtime/vm_operations.hpp" | |
57 #include "services/attachListener.hpp" | |
58 #include "services/management.hpp" | |
59 #include "services/threadService.hpp" | |
60 #include "utilities/copy.hpp" | |
61 #include "utilities/defaultStream.hpp" | |
62 #include "utilities/dtrace.hpp" | |
63 #include "utilities/events.hpp" | |
64 #include "utilities/histogram.hpp" | |
65 #include "utilities/top.hpp" | |
66 #include "utilities/utf8.hpp" | |
67 #ifdef TARGET_OS_FAMILY_linux | |
68 # include "jvm_linux.h" | |
69 #endif | |
70 #ifdef TARGET_OS_FAMILY_solaris | |
71 # include "jvm_solaris.h" | |
72 #endif | |
73 #ifdef TARGET_OS_FAMILY_windows | |
74 # include "jvm_windows.h" | |
75 #endif | |
3960 | 76 #ifdef TARGET_OS_FAMILY_bsd |
77 # include "jvm_bsd.h" | |
78 #endif | |
1972 | 79 |
0 | 80 #include <errno.h> |
81 | |
4006 | 82 #ifndef USDT2 |
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83 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long); |
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84 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int); |
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85 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield); |
4006 | 86 #endif /* !USDT2 */ |
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87 |
0 | 88 /* |
89 NOTE about use of any ctor or function call that can trigger a safepoint/GC: | |
90 such ctors and calls MUST NOT come between an oop declaration/init and its | |
91 usage because if objects are move this may cause various memory stomps, bus | |
92 errors and segfaults. Here is a cookbook for causing so called "naked oop | |
93 failures": | |
94 | |
95 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> { | |
96 JVMWrapper("JVM_GetClassDeclaredFields"); | |
97 | |
98 // Object address to be held directly in mirror & not visible to GC | |
99 oop mirror = JNIHandles::resolve_non_null(ofClass); | |
100 | |
101 // If this ctor can hit a safepoint, moving objects around, then | |
102 ComplexConstructor foo; | |
103 | |
104 // Boom! mirror may point to JUNK instead of the intended object | |
105 (some dereference of mirror) | |
106 | |
107 // Here's another call that may block for GC, making mirror stale | |
108 MutexLocker ml(some_lock); | |
109 | |
110 // And here's an initializer that can result in a stale oop | |
111 // all in one step. | |
112 oop o = call_that_can_throw_exception(TRAPS); | |
113 | |
114 | |
115 The solution is to keep the oop declaration BELOW the ctor or function | |
116 call that might cause a GC, do another resolve to reassign the oop, or | |
117 consider use of a Handle instead of an oop so there is immunity from object | |
118 motion. But note that the "QUICK" entries below do not have a handlemark | |
119 and thus can only support use of handles passed in. | |
120 */ | |
121 | |
122 static void trace_class_resolution_impl(klassOop to_class, TRAPS) { | |
123 ResourceMark rm; | |
124 int line_number = -1; | |
125 const char * source_file = NULL; | |
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126 const char * trace = "explicit"; |
0 | 127 klassOop caller = NULL; |
128 JavaThread* jthread = JavaThread::current(); | |
129 if (jthread->has_last_Java_frame()) { | |
130 vframeStream vfst(jthread); | |
131 | |
132 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames | |
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133 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK); |
0 | 134 klassOop access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK); |
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135 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK); |
0 | 136 klassOop privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK); |
137 | |
138 methodOop last_caller = NULL; | |
139 | |
140 while (!vfst.at_end()) { | |
141 methodOop m = vfst.method(); | |
1142 | 142 if (!vfst.method()->method_holder()->klass_part()->is_subclass_of(SystemDictionary::ClassLoader_klass())&& |
0 | 143 !vfst.method()->method_holder()->klass_part()->is_subclass_of(access_controller_klass) && |
144 !vfst.method()->method_holder()->klass_part()->is_subclass_of(privileged_action_klass)) { | |
145 break; | |
146 } | |
147 last_caller = m; | |
148 vfst.next(); | |
149 } | |
150 // if this is called from Class.forName0 and that is called from Class.forName, | |
151 // then print the caller of Class.forName. If this is Class.loadClass, then print | |
152 // that caller, otherwise keep quiet since this should be picked up elsewhere. | |
153 bool found_it = false; | |
154 if (!vfst.at_end() && | |
155 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() && | |
156 vfst.method()->name() == vmSymbols::forName0_name()) { | |
157 vfst.next(); | |
158 if (!vfst.at_end() && | |
159 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() && | |
160 vfst.method()->name() == vmSymbols::forName_name()) { | |
161 vfst.next(); | |
162 found_it = true; | |
163 } | |
164 } else if (last_caller != NULL && | |
165 instanceKlass::cast(last_caller->method_holder())->name() == | |
166 vmSymbols::java_lang_ClassLoader() && | |
167 (last_caller->name() == vmSymbols::loadClassInternal_name() || | |
168 last_caller->name() == vmSymbols::loadClass_name())) { | |
169 found_it = true; | |
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170 } else if (!vfst.at_end()) { |
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171 if (vfst.method()->is_native()) { |
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172 // JNI call |
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173 found_it = true; |
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174 } |
0 | 175 } |
176 if (found_it && !vfst.at_end()) { | |
177 // found the caller | |
178 caller = vfst.method()->method_holder(); | |
179 line_number = vfst.method()->line_number_from_bci(vfst.bci()); | |
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180 if (line_number == -1) { |
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181 // show method name if it's a native method |
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182 trace = vfst.method()->name_and_sig_as_C_string(); |
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183 } |
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184 Symbol* s = instanceKlass::cast(caller)->source_file_name(); |
0 | 185 if (s != NULL) { |
186 source_file = s->as_C_string(); | |
187 } | |
188 } | |
189 } | |
190 if (caller != NULL) { | |
191 if (to_class != caller) { | |
192 const char * from = Klass::cast(caller)->external_name(); | |
193 const char * to = Klass::cast(to_class)->external_name(); | |
194 // print in a single call to reduce interleaving between threads | |
195 if (source_file != NULL) { | |
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196 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace); |
0 | 197 } else { |
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198 tty->print("RESOLVE %s %s (%s)\n", from, to, trace); |
0 | 199 } |
200 } | |
201 } | |
202 } | |
203 | |
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204 void trace_class_resolution(klassOop to_class) { |
0 | 205 EXCEPTION_MARK; |
206 trace_class_resolution_impl(to_class, THREAD); | |
207 if (HAS_PENDING_EXCEPTION) { | |
208 CLEAR_PENDING_EXCEPTION; | |
209 } | |
210 } | |
211 | |
212 // Wrapper to trace JVM functions | |
213 | |
214 #ifdef ASSERT | |
215 class JVMTraceWrapper : public StackObj { | |
216 public: | |
217 JVMTraceWrapper(const char* format, ...) { | |
218 if (TraceJVMCalls) { | |
219 va_list ap; | |
220 va_start(ap, format); | |
221 tty->print("JVM "); | |
222 tty->vprint_cr(format, ap); | |
223 va_end(ap); | |
224 } | |
225 } | |
226 }; | |
227 | |
228 Histogram* JVMHistogram; | |
229 volatile jint JVMHistogram_lock = 0; | |
230 | |
231 class JVMHistogramElement : public HistogramElement { | |
232 public: | |
233 JVMHistogramElement(const char* name); | |
234 }; | |
235 | |
236 JVMHistogramElement::JVMHistogramElement(const char* elementName) { | |
237 _name = elementName; | |
238 uintx count = 0; | |
239 | |
240 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) { | |
241 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) { | |
242 count +=1; | |
243 if ( (WarnOnStalledSpinLock > 0) | |
244 && (count % WarnOnStalledSpinLock == 0)) { | |
245 warning("JVMHistogram_lock seems to be stalled"); | |
246 } | |
247 } | |
248 } | |
249 | |
250 if(JVMHistogram == NULL) | |
251 JVMHistogram = new Histogram("JVM Call Counts",100); | |
252 | |
253 JVMHistogram->add_element(this); | |
254 Atomic::dec(&JVMHistogram_lock); | |
255 } | |
256 | |
257 #define JVMCountWrapper(arg) \ | |
258 static JVMHistogramElement* e = new JVMHistogramElement(arg); \ | |
259 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen! | |
260 | |
261 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1) | |
262 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2) | |
263 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3) | |
264 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4) | |
265 #else | |
266 #define JVMWrapper(arg1) | |
267 #define JVMWrapper2(arg1, arg2) | |
268 #define JVMWrapper3(arg1, arg2, arg3) | |
269 #define JVMWrapper4(arg1, arg2, arg3, arg4) | |
270 #endif | |
271 | |
272 | |
273 // Interface version ///////////////////////////////////////////////////////////////////// | |
274 | |
275 | |
276 JVM_LEAF(jint, JVM_GetInterfaceVersion()) | |
277 return JVM_INTERFACE_VERSION; | |
278 JVM_END | |
279 | |
280 | |
281 // java.lang.System ////////////////////////////////////////////////////////////////////// | |
282 | |
283 | |
284 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored)) | |
285 JVMWrapper("JVM_CurrentTimeMillis"); | |
286 return os::javaTimeMillis(); | |
287 JVM_END | |
288 | |
289 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored)) | |
290 JVMWrapper("JVM_NanoTime"); | |
291 return os::javaTimeNanos(); | |
292 JVM_END | |
293 | |
294 | |
295 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos, | |
296 jobject dst, jint dst_pos, jint length)) | |
297 JVMWrapper("JVM_ArrayCopy"); | |
298 // Check if we have null pointers | |
299 if (src == NULL || dst == NULL) { | |
300 THROW(vmSymbols::java_lang_NullPointerException()); | |
301 } | |
302 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src)); | |
303 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst)); | |
304 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop"); | |
305 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop"); | |
306 // Do copy | |
307 Klass::cast(s->klass())->copy_array(s, src_pos, d, dst_pos, length, thread); | |
308 JVM_END | |
309 | |
310 | |
311 static void set_property(Handle props, const char* key, const char* value, TRAPS) { | |
312 JavaValue r(T_OBJECT); | |
313 // public synchronized Object put(Object key, Object value); | |
314 HandleMark hm(THREAD); | |
315 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK); | |
316 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK); | |
317 JavaCalls::call_virtual(&r, | |
318 props, | |
1142 | 319 KlassHandle(THREAD, SystemDictionary::Properties_klass()), |
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320 vmSymbols::put_name(), |
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321 vmSymbols::object_object_object_signature(), |
0 | 322 key_str, |
323 value_str, | |
324 THREAD); | |
325 } | |
326 | |
327 | |
328 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties)); | |
329 | |
330 | |
331 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties)) | |
332 JVMWrapper("JVM_InitProperties"); | |
333 ResourceMark rm; | |
334 | |
335 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); | |
336 | |
337 // System property list includes both user set via -D option and | |
338 // jvm system specific properties. | |
339 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { | |
340 PUTPROP(props, p->key(), p->value()); | |
341 } | |
342 | |
343 // Convert the -XX:MaxDirectMemorySize= command line flag | |
344 // to the sun.nio.MaxDirectMemorySize property. | |
345 // Do this after setting user properties to prevent people | |
346 // from setting the value with a -D option, as requested. | |
347 { | |
348 char as_chars[256]; | |
349 jio_snprintf(as_chars, sizeof(as_chars), INTX_FORMAT, MaxDirectMemorySize); | |
350 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars); | |
351 } | |
352 | |
353 // JVM monitoring and management support | |
354 // Add the sun.management.compiler property for the compiler's name | |
355 { | |
356 #undef CSIZE | |
357 #if defined(_LP64) || defined(_WIN64) | |
358 #define CSIZE "64-Bit " | |
359 #else | |
360 #define CSIZE | |
361 #endif // 64bit | |
362 | |
363 #ifdef TIERED | |
364 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers"; | |
365 #else | |
366 #if defined(COMPILER1) | |
367 const char* compiler_name = "HotSpot " CSIZE "Client Compiler"; | |
368 #elif defined(COMPILER2) | |
369 const char* compiler_name = "HotSpot " CSIZE "Server Compiler"; | |
370 #else | |
371 const char* compiler_name = ""; | |
372 #endif // compilers | |
373 #endif // TIERED | |
374 | |
375 if (*compiler_name != '\0' && | |
376 (Arguments::mode() != Arguments::_int)) { | |
377 PUTPROP(props, "sun.management.compiler", compiler_name); | |
378 } | |
379 } | |
380 | |
381 return properties; | |
382 JVM_END | |
383 | |
384 | |
385 // java.lang.Runtime ///////////////////////////////////////////////////////////////////////// | |
386 | |
387 extern volatile jint vm_created; | |
388 | |
389 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code)) | |
390 if (vm_created != 0 && (code == 0)) { | |
391 // The VM is about to exit. We call back into Java to check whether finalizers should be run | |
392 Universe::run_finalizers_on_exit(); | |
393 } | |
394 before_exit(thread); | |
395 vm_exit(code); | |
396 JVM_END | |
397 | |
398 | |
399 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code)) | |
400 before_exit(thread); | |
401 vm_exit(code); | |
402 JVM_END | |
403 | |
404 | |
405 JVM_LEAF(void, JVM_OnExit(void (*func)(void))) | |
406 register_on_exit_function(func); | |
407 JVM_END | |
408 | |
409 | |
410 JVM_ENTRY_NO_ENV(void, JVM_GC(void)) | |
411 JVMWrapper("JVM_GC"); | |
412 if (!DisableExplicitGC) { | |
413 Universe::heap()->collect(GCCause::_java_lang_system_gc); | |
414 } | |
415 JVM_END | |
416 | |
417 | |
418 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void)) | |
419 JVMWrapper("JVM_MaxObjectInspectionAge"); | |
420 return Universe::heap()->millis_since_last_gc(); | |
421 JVM_END | |
422 | |
423 | |
424 JVM_LEAF(void, JVM_TraceInstructions(jboolean on)) | |
425 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported"); | |
426 JVM_END | |
427 | |
428 | |
429 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on)) | |
430 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported"); | |
431 JVM_END | |
432 | |
433 static inline jlong convert_size_t_to_jlong(size_t val) { | |
434 // In the 64-bit vm, a size_t can overflow a jlong (which is signed). | |
435 NOT_LP64 (return (jlong)val;) | |
436 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);) | |
437 } | |
438 | |
439 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void)) | |
440 JVMWrapper("JVM_TotalMemory"); | |
441 size_t n = Universe::heap()->capacity(); | |
442 return convert_size_t_to_jlong(n); | |
443 JVM_END | |
444 | |
445 | |
446 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void)) | |
447 JVMWrapper("JVM_FreeMemory"); | |
448 CollectedHeap* ch = Universe::heap(); | |
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449 size_t n; |
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450 { |
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451 MutexLocker x(Heap_lock); |
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452 n = ch->capacity() - ch->used(); |
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453 } |
0 | 454 return convert_size_t_to_jlong(n); |
455 JVM_END | |
456 | |
457 | |
458 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void)) | |
459 JVMWrapper("JVM_MaxMemory"); | |
460 size_t n = Universe::heap()->max_capacity(); | |
461 return convert_size_t_to_jlong(n); | |
462 JVM_END | |
463 | |
464 | |
465 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void)) | |
466 JVMWrapper("JVM_ActiveProcessorCount"); | |
467 return os::active_processor_count(); | |
468 JVM_END | |
469 | |
470 | |
471 | |
472 // java.lang.Throwable ////////////////////////////////////////////////////// | |
473 | |
474 | |
475 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver)) | |
476 JVMWrapper("JVM_FillInStackTrace"); | |
477 Handle exception(thread, JNIHandles::resolve_non_null(receiver)); | |
478 java_lang_Throwable::fill_in_stack_trace(exception); | |
479 JVM_END | |
480 | |
481 | |
482 JVM_ENTRY(void, JVM_PrintStackTrace(JNIEnv *env, jobject receiver, jobject printable)) | |
483 JVMWrapper("JVM_PrintStackTrace"); | |
484 // Note: This is no longer used in Merlin, but we still support it for compatibility. | |
485 oop exception = JNIHandles::resolve_non_null(receiver); | |
486 oop stream = JNIHandles::resolve_non_null(printable); | |
487 java_lang_Throwable::print_stack_trace(exception, stream); | |
488 JVM_END | |
489 | |
490 | |
491 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable)) | |
492 JVMWrapper("JVM_GetStackTraceDepth"); | |
493 oop exception = JNIHandles::resolve(throwable); | |
494 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD); | |
495 JVM_END | |
496 | |
497 | |
498 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index)) | |
499 JVMWrapper("JVM_GetStackTraceElement"); | |
500 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC | |
501 oop exception = JNIHandles::resolve(throwable); | |
502 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL); | |
503 return JNIHandles::make_local(env, element); | |
504 JVM_END | |
505 | |
506 | |
507 // java.lang.Object /////////////////////////////////////////////// | |
508 | |
509 | |
510 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle)) | |
511 JVMWrapper("JVM_IHashCode"); | |
512 // as implemented in the classic virtual machine; return 0 if object is NULL | |
513 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ; | |
514 JVM_END | |
515 | |
516 | |
517 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms)) | |
518 JVMWrapper("JVM_MonitorWait"); | |
519 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
520 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorWait must apply to an object"); | |
521 JavaThreadInObjectWaitState jtiows(thread, ms != 0); | |
522 if (JvmtiExport::should_post_monitor_wait()) { | |
523 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms); | |
524 } | |
525 ObjectSynchronizer::wait(obj, ms, CHECK); | |
526 JVM_END | |
527 | |
528 | |
529 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle)) | |
530 JVMWrapper("JVM_MonitorNotify"); | |
531 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
532 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotify must apply to an object"); | |
533 ObjectSynchronizer::notify(obj, CHECK); | |
534 JVM_END | |
535 | |
536 | |
537 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle)) | |
538 JVMWrapper("JVM_MonitorNotifyAll"); | |
539 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
540 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotifyAll must apply to an object"); | |
541 ObjectSynchronizer::notifyall(obj, CHECK); | |
542 JVM_END | |
543 | |
544 | |
545 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle)) | |
546 JVMWrapper("JVM_Clone"); | |
547 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
548 const KlassHandle klass (THREAD, obj->klass()); | |
549 JvmtiVMObjectAllocEventCollector oam; | |
550 | |
551 #ifdef ASSERT | |
552 // Just checking that the cloneable flag is set correct | |
553 if (obj->is_javaArray()) { | |
554 guarantee(klass->is_cloneable(), "all arrays are cloneable"); | |
555 } else { | |
556 guarantee(obj->is_instance(), "should be instanceOop"); | |
1142 | 557 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass()); |
0 | 558 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag"); |
559 } | |
560 #endif | |
561 | |
562 // Check if class of obj supports the Cloneable interface. | |
563 // All arrays are considered to be cloneable (See JLS 20.1.5) | |
564 if (!klass->is_cloneable()) { | |
565 ResourceMark rm(THREAD); | |
566 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name()); | |
567 } | |
568 | |
569 // Make shallow object copy | |
570 const int size = obj->size(); | |
571 oop new_obj = NULL; | |
572 if (obj->is_javaArray()) { | |
573 const int length = ((arrayOop)obj())->length(); | |
574 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL); | |
575 } else { | |
576 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL); | |
577 } | |
578 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread | |
579 // is modifying a reference field in the clonee, a non-oop-atomic copy might | |
580 // be suspended in the middle of copying the pointer and end up with parts | |
581 // of two different pointers in the field. Subsequent dereferences will crash. | |
582 // 4846409: an oop-copy of objects with long or double fields or arrays of same | |
583 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead | |
584 // of oops. We know objects are aligned on a minimum of an jlong boundary. | |
585 // The same is true of StubRoutines::object_copy and the various oop_copy | |
586 // variants, and of the code generated by the inline_native_clone intrinsic. | |
587 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned"); | |
588 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj, | |
589 (size_t)align_object_size(size) / HeapWordsPerLong); | |
590 // Clear the header | |
591 new_obj->init_mark(); | |
592 | |
593 // Store check (mark entire object and let gc sort it out) | |
594 BarrierSet* bs = Universe::heap()->barrier_set(); | |
595 assert(bs->has_write_region_opt(), "Barrier set does not have write_region"); | |
596 bs->write_region(MemRegion((HeapWord*)new_obj, size)); | |
597 | |
598 // Caution: this involves a java upcall, so the clone should be | |
599 // "gc-robust" by this stage. | |
600 if (klass->has_finalizer()) { | |
601 assert(obj->is_instance(), "should be instanceOop"); | |
602 new_obj = instanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL); | |
603 } | |
604 | |
605 return JNIHandles::make_local(env, oop(new_obj)); | |
606 JVM_END | |
607 | |
608 // java.lang.Compiler //////////////////////////////////////////////////// | |
609 | |
610 // The initial cuts of the HotSpot VM will not support JITs, and all existing | |
611 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM | |
612 // functions are all silently ignored unless JVM warnings are printed. | |
613 | |
614 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls)) | |
615 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported"); | |
616 JVM_END | |
617 | |
618 | |
619 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls)) | |
620 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported"); | |
621 return JNI_FALSE; | |
622 JVM_END | |
623 | |
624 | |
625 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls)) | |
626 if (PrintJVMWarnings) warning("JVM_CompileClass not supported"); | |
627 return JNI_FALSE; | |
628 JVM_END | |
629 | |
630 | |
631 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname)) | |
632 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported"); | |
633 return JNI_FALSE; | |
634 JVM_END | |
635 | |
636 | |
637 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg)) | |
638 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported"); | |
639 return NULL; | |
640 JVM_END | |
641 | |
642 | |
643 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls)) | |
644 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported"); | |
645 JVM_END | |
646 | |
647 | |
648 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls)) | |
649 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported"); | |
650 JVM_END | |
651 | |
652 | |
653 | |
654 // Error message support ////////////////////////////////////////////////////// | |
655 | |
656 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len)) | |
657 JVMWrapper("JVM_GetLastErrorString"); | |
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658 return (jint)os::lasterror(buf, len); |
0 | 659 JVM_END |
660 | |
661 | |
662 // java.io.File /////////////////////////////////////////////////////////////// | |
663 | |
664 JVM_LEAF(char*, JVM_NativePath(char* path)) | |
665 JVMWrapper2("JVM_NativePath (%s)", path); | |
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666 return os::native_path(path); |
0 | 667 JVM_END |
668 | |
669 | |
670 // Misc. class handling /////////////////////////////////////////////////////////// | |
671 | |
672 | |
673 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth)) | |
674 JVMWrapper("JVM_GetCallerClass"); | |
675 klassOop k = thread->security_get_caller_class(depth); | |
676 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); | |
677 JVM_END | |
678 | |
679 | |
680 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf)) | |
681 JVMWrapper("JVM_FindPrimitiveClass"); | |
682 oop mirror = NULL; | |
683 BasicType t = name2type(utf); | |
684 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) { | |
685 mirror = Universe::java_mirror(t); | |
686 } | |
687 if (mirror == NULL) { | |
688 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf); | |
689 } else { | |
690 return (jclass) JNIHandles::make_local(env, mirror); | |
691 } | |
692 JVM_END | |
693 | |
694 | |
695 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls)) | |
696 JVMWrapper("JVM_ResolveClass"); | |
697 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented"); | |
698 JVM_END | |
699 | |
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700 |
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701 // Returns a class loaded by the bootstrap class loader; or null |
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702 // if not found. ClassNotFoundException is not thrown. |
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703 // |
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704 // Rationale behind JVM_FindClassFromBootLoader |
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705 // a> JVM_FindClassFromClassLoader was never exported in the export tables. |
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706 // b> because of (a) java.dll has a direct dependecy on the unexported |
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707 // private symbol "_JVM_FindClassFromClassLoader@20". |
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708 // c> the launcher cannot use the private symbol as it dynamically opens |
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709 // the entry point, so if something changes, the launcher will fail |
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710 // unexpectedly at runtime, it is safest for the launcher to dlopen a |
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711 // stable exported interface. |
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712 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its |
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713 // signature to change from _JVM_FindClassFromClassLoader@20 to |
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714 // JVM_FindClassFromClassLoader and will not be backward compatible |
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715 // with older JDKs. |
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716 // Thus a public/stable exported entry point is the right solution, |
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717 // public here means public in linker semantics, and is exported only |
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718 // to the JDK, and is not intended to be a public API. |
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719 |
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720 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env, |
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721 const char* name)) |
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722 JVMWrapper2("JVM_FindClassFromBootLoader %s", name); |
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723 |
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724 // Java libraries should ensure that name is never null... |
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725 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { |
878
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726 // It's impossible to create this class; the name cannot fit |
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727 // into the constant pool. |
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728 return NULL; |
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729 } |
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730 |
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731 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); |
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732 klassOop k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL); |
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733 if (k == NULL) { |
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734 return NULL; |
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735 } |
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736 |
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737 if (TraceClassResolution) { |
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738 trace_class_resolution(k); |
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739 } |
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740 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); |
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741 JVM_END |
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742 |
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743 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name, |
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744 jboolean init, jobject loader, |
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745 jboolean throwError)) |
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746 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name, |
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747 throwError ? "error" : "exception"); |
388 | 748 // Java libraries should ensure that name is never null... |
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749 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { |
388 | 750 // It's impossible to create this class; the name cannot fit |
751 // into the constant pool. | |
752 if (throwError) { | |
753 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
754 } else { | |
755 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name); | |
756 } | |
757 } | |
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758 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); |
388 | 759 Handle h_loader(THREAD, JNIHandles::resolve(loader)); |
760 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, | |
761 Handle(), throwError, THREAD); | |
762 | |
763 if (TraceClassResolution && result != NULL) { | |
764 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); | |
765 } | |
766 return result; | |
0 | 767 JVM_END |
768 | |
769 | |
770 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name, | |
771 jboolean init, jclass from)) | |
772 JVMWrapper2("JVM_FindClassFromClass %s", name); | |
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773 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { |
0 | 774 // It's impossible to create this class; the name cannot fit |
775 // into the constant pool. | |
776 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
777 } | |
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778 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); |
0 | 779 oop from_class_oop = JNIHandles::resolve(from); |
780 klassOop from_class = (from_class_oop == NULL) | |
781 ? (klassOop)NULL | |
782 : java_lang_Class::as_klassOop(from_class_oop); | |
783 oop class_loader = NULL; | |
784 oop protection_domain = NULL; | |
785 if (from_class != NULL) { | |
786 class_loader = Klass::cast(from_class)->class_loader(); | |
787 protection_domain = Klass::cast(from_class)->protection_domain(); | |
788 } | |
789 Handle h_loader(THREAD, class_loader); | |
790 Handle h_prot (THREAD, protection_domain); | |
791 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, | |
792 h_prot, true, thread); | |
793 | |
794 if (TraceClassResolution && result != NULL) { | |
795 // this function is generally only used for class loading during verification. | |
796 ResourceMark rm; | |
797 oop from_mirror = JNIHandles::resolve_non_null(from); | |
798 klassOop from_class = java_lang_Class::as_klassOop(from_mirror); | |
799 const char * from_name = Klass::cast(from_class)->external_name(); | |
800 | |
801 oop mirror = JNIHandles::resolve_non_null(result); | |
802 klassOop to_class = java_lang_Class::as_klassOop(mirror); | |
803 const char * to = Klass::cast(to_class)->external_name(); | |
804 tty->print("RESOLVE %s %s (verification)\n", from_name, to); | |
805 } | |
806 | |
807 return result; | |
808 JVM_END | |
809 | |
810 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) { | |
811 if (loader.is_null()) { | |
812 return; | |
813 } | |
814 | |
815 // check whether the current caller thread holds the lock or not. | |
816 // If not, increment the corresponding counter | |
817 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) != | |
818 ObjectSynchronizer::owner_self) { | |
819 counter->inc(); | |
820 } | |
821 } | |
822 | |
823 // common code for JVM_DefineClass() and JVM_DefineClassWithSource() | |
973
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824 // and JVM_DefineClassWithSourceCond() |
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825 static jclass jvm_define_class_common(JNIEnv *env, const char *name, |
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826 jobject loader, const jbyte *buf, |
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827 jsize len, jobject pd, const char *source, |
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828 jboolean verify, TRAPS) { |
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829 if (source == NULL) source = "__JVM_DefineClass__"; |
0 | 830 |
875
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831 assert(THREAD->is_Java_thread(), "must be a JavaThread"); |
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832 JavaThread* jt = (JavaThread*) THREAD; |
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833 |
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834 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(), |
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835 ClassLoader::perf_define_appclass_selftime(), |
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836 ClassLoader::perf_define_appclasses(), |
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837 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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838 jt->get_thread_stat()->perf_timers_addr(), |
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839 PerfClassTraceTime::DEFINE_CLASS); |
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840 |
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841 if (UsePerfData) { |
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842 ClassLoader::perf_app_classfile_bytes_read()->inc(len); |
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843 } |
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844 |
0 | 845 // Since exceptions can be thrown, class initialization can take place |
846 // if name is NULL no check for class name in .class stream has to be made. | |
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847 TempNewSymbol class_name = NULL; |
0 | 848 if (name != NULL) { |
849 const int str_len = (int)strlen(name); | |
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850 if (str_len > Symbol::max_length()) { |
0 | 851 // It's impossible to create this class; the name cannot fit |
852 // into the constant pool. | |
853 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
854 } | |
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855 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL); |
0 | 856 } |
857 | |
858 ResourceMark rm(THREAD); | |
859 ClassFileStream st((u1*) buf, len, (char *)source); | |
860 Handle class_loader (THREAD, JNIHandles::resolve(loader)); | |
861 if (UsePerfData) { | |
862 is_lock_held_by_thread(class_loader, | |
863 ClassLoader::sync_JVMDefineClassLockFreeCounter(), | |
864 THREAD); | |
865 } | |
866 Handle protection_domain (THREAD, JNIHandles::resolve(pd)); | |
867 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader, | |
868 protection_domain, &st, | |
973
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869 verify != 0, |
0 | 870 CHECK_NULL); |
871 | |
872 if (TraceClassResolution && k != NULL) { | |
873 trace_class_resolution(k); | |
874 } | |
875 | |
876 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); | |
877 } | |
878 | |
879 | |
880 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd)) | |
881 JVMWrapper2("JVM_DefineClass %s", name); | |
882 | |
973
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883 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD); |
0 | 884 JVM_END |
885 | |
886 | |
887 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source)) | |
888 JVMWrapper2("JVM_DefineClassWithSource %s", name); | |
889 | |
973
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890 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD); |
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891 JVM_END |
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892 |
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893 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name, |
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894 jobject loader, const jbyte *buf, |
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895 jsize len, jobject pd, |
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896 const char *source, jboolean verify)) |
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897 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name); |
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898 |
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899 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD); |
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900 JVM_END |
0 | 901 |
902 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name)) | |
903 JVMWrapper("JVM_FindLoadedClass"); | |
904 ResourceMark rm(THREAD); | |
905 | |
906 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); | |
907 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL); | |
908 | |
909 const char* str = java_lang_String::as_utf8_string(string()); | |
910 // Sanity check, don't expect null | |
911 if (str == NULL) return NULL; | |
912 | |
913 const int str_len = (int)strlen(str); | |
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914 if (str_len > Symbol::max_length()) { |
0 | 915 // It's impossible to create this class; the name cannot fit |
916 // into the constant pool. | |
917 return NULL; | |
918 } | |
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919 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL); |
0 | 920 |
921 // Security Note: | |
922 // The Java level wrapper will perform the necessary security check allowing | |
923 // us to pass the NULL as the initiating class loader. | |
924 Handle h_loader(THREAD, JNIHandles::resolve(loader)); | |
925 if (UsePerfData) { | |
926 is_lock_held_by_thread(h_loader, | |
927 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(), | |
928 THREAD); | |
929 } | |
930 | |
931 klassOop k = SystemDictionary::find_instance_or_array_klass(klass_name, | |
932 h_loader, | |
933 Handle(), | |
934 CHECK_NULL); | |
935 | |
936 return (k == NULL) ? NULL : | |
937 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); | |
938 JVM_END | |
939 | |
940 | |
941 // Reflection support ////////////////////////////////////////////////////////////////////////////// | |
942 | |
943 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls)) | |
944 assert (cls != NULL, "illegal class"); | |
945 JVMWrapper("JVM_GetClassName"); | |
946 JvmtiVMObjectAllocEventCollector oam; | |
947 ResourceMark rm(THREAD); | |
948 const char* name; | |
949 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
950 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls))); | |
951 } else { | |
952 // Consider caching interned string in Klass | |
953 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
954 assert(k->is_klass(), "just checking"); | |
955 name = Klass::cast(k)->external_name(); | |
956 } | |
957 oop result = StringTable::intern((char*) name, CHECK_NULL); | |
958 return (jstring) JNIHandles::make_local(env, result); | |
959 JVM_END | |
960 | |
961 | |
962 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls)) | |
963 JVMWrapper("JVM_GetClassInterfaces"); | |
964 JvmtiVMObjectAllocEventCollector oam; | |
965 oop mirror = JNIHandles::resolve_non_null(cls); | |
966 | |
967 // Special handling for primitive objects | |
968 if (java_lang_Class::is_primitive(mirror)) { | |
969 // Primitive objects does not have any interfaces | |
1142 | 970 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); |
0 | 971 return (jobjectArray) JNIHandles::make_local(env, r); |
972 } | |
973 | |
974 KlassHandle klass(thread, java_lang_Class::as_klassOop(mirror)); | |
975 // Figure size of result array | |
976 int size; | |
977 if (klass->oop_is_instance()) { | |
978 size = instanceKlass::cast(klass())->local_interfaces()->length(); | |
979 } else { | |
980 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass"); | |
981 size = 2; | |
982 } | |
983 | |
984 // Allocate result array | |
1142 | 985 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL); |
0 | 986 objArrayHandle result (THREAD, r); |
987 // Fill in result | |
988 if (klass->oop_is_instance()) { | |
989 // Regular instance klass, fill in all local interfaces | |
990 for (int index = 0; index < size; index++) { | |
991 klassOop k = klassOop(instanceKlass::cast(klass())->local_interfaces()->obj_at(index)); | |
992 result->obj_at_put(index, Klass::cast(k)->java_mirror()); | |
993 } | |
994 } else { | |
995 // All arrays implement java.lang.Cloneable and java.io.Serializable | |
1142 | 996 result->obj_at_put(0, Klass::cast(SystemDictionary::Cloneable_klass())->java_mirror()); |
997 result->obj_at_put(1, Klass::cast(SystemDictionary::Serializable_klass())->java_mirror()); | |
0 | 998 } |
999 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1000 JVM_END | |
1001 | |
1002 | |
1003 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls)) | |
1004 JVMWrapper("JVM_GetClassLoader"); | |
1005 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1006 return NULL; | |
1007 } | |
1008 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1009 oop loader = Klass::cast(k)->class_loader(); | |
1010 return JNIHandles::make_local(env, loader); | |
1011 JVM_END | |
1012 | |
1013 | |
1014 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls)) | |
1015 JVMWrapper("JVM_IsInterface"); | |
1016 oop mirror = JNIHandles::resolve_non_null(cls); | |
1017 if (java_lang_Class::is_primitive(mirror)) { | |
1018 return JNI_FALSE; | |
1019 } | |
1020 klassOop k = java_lang_Class::as_klassOop(mirror); | |
1021 jboolean result = Klass::cast(k)->is_interface(); | |
1022 assert(!result || Klass::cast(k)->oop_is_instance(), | |
1023 "all interfaces are instance types"); | |
1024 // The compiler intrinsic for isInterface tests the | |
1025 // Klass::_access_flags bits in the same way. | |
1026 return result; | |
1027 JVM_END | |
1028 | |
1029 | |
1030 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls)) | |
1031 JVMWrapper("JVM_GetClassSigners"); | |
1032 JvmtiVMObjectAllocEventCollector oam; | |
1033 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1034 // There are no signers for primitive types | |
1035 return NULL; | |
1036 } | |
1037 | |
1038 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1039 objArrayOop signers = NULL; | |
1040 if (Klass::cast(k)->oop_is_instance()) { | |
1041 signers = instanceKlass::cast(k)->signers(); | |
1042 } | |
1043 | |
1044 // If there are no signers set in the class, or if the class | |
1045 // is an array, return NULL. | |
1046 if (signers == NULL) return NULL; | |
1047 | |
1048 // copy of the signers array | |
1049 klassOop element = objArrayKlass::cast(signers->klass())->element_klass(); | |
1050 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL); | |
1051 for (int index = 0; index < signers->length(); index++) { | |
1052 signers_copy->obj_at_put(index, signers->obj_at(index)); | |
1053 } | |
1054 | |
1055 // return the copy | |
1056 return (jobjectArray) JNIHandles::make_local(env, signers_copy); | |
1057 JVM_END | |
1058 | |
1059 | |
1060 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers)) | |
1061 JVMWrapper("JVM_SetClassSigners"); | |
1062 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1063 // This call is ignored for primitive types and arrays. | |
1064 // Signers are only set once, ClassLoader.java, and thus shouldn't | |
1065 // be called with an array. Only the bootstrap loader creates arrays. | |
1066 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1067 if (Klass::cast(k)->oop_is_instance()) { | |
1068 instanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers))); | |
1069 } | |
1070 } | |
1071 JVM_END | |
1072 | |
1073 | |
1074 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls)) | |
1075 JVMWrapper("JVM_GetProtectionDomain"); | |
1076 if (JNIHandles::resolve(cls) == NULL) { | |
1077 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); | |
1078 } | |
1079 | |
1080 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
1081 // Primitive types does not have a protection domain. | |
1082 return NULL; | |
1083 } | |
1084 | |
1085 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
1086 return (jobject) JNIHandles::make_local(env, Klass::cast(k)->protection_domain()); | |
1087 JVM_END | |
1088 | |
1089 | |
1090 // Obsolete since 1.2 (Class.setProtectionDomain removed), although | |
1091 // still defined in core libraries as of 1.5. | |
1092 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain)) | |
1093 JVMWrapper("JVM_SetProtectionDomain"); | |
1094 if (JNIHandles::resolve(cls) == NULL) { | |
1095 THROW(vmSymbols::java_lang_NullPointerException()); | |
1096 } | |
1097 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
1098 // Call is ignored for primitive types | |
1099 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
1100 | |
1101 // cls won't be an array, as this called only from ClassLoader.defineClass | |
1102 if (Klass::cast(k)->oop_is_instance()) { | |
1103 oop pd = JNIHandles::resolve(protection_domain); | |
1104 assert(pd == NULL || pd->is_oop(), "just checking"); | |
1105 instanceKlass::cast(k)->set_protection_domain(pd); | |
1106 } | |
1107 } | |
1108 JVM_END | |
1109 | |
1110 | |
1111 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException)) | |
1112 JVMWrapper("JVM_DoPrivileged"); | |
1113 | |
1114 if (action == NULL) { | |
1115 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action"); | |
1116 } | |
1117 | |
1118 // Stack allocated list of privileged stack elements | |
1119 PrivilegedElement pi; | |
1120 | |
1121 // Check that action object understands "Object run()" | |
1122 Handle object (THREAD, JNIHandles::resolve(action)); | |
1123 | |
1124 // get run() method | |
1125 methodOop m_oop = Klass::cast(object->klass())->uncached_lookup_method( | |
1126 vmSymbols::run_method_name(), | |
1127 vmSymbols::void_object_signature()); | |
1128 methodHandle m (THREAD, m_oop); | |
1129 if (m.is_null() || !m->is_method() || !methodOop(m())->is_public() || methodOop(m())->is_static()) { | |
1130 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method"); | |
1131 } | |
1132 | |
1133 // Compute the frame initiating the do privileged operation and setup the privileged stack | |
1134 vframeStream vfst(thread); | |
1135 vfst.security_get_caller_frame(1); | |
1136 | |
1137 if (!vfst.at_end()) { | |
1138 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL); | |
1139 thread->set_privileged_stack_top(&pi); | |
1140 } | |
1141 | |
1142 | |
1143 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type | |
1144 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction | |
1145 Handle pending_exception; | |
1146 JavaValue result(T_OBJECT); | |
1147 JavaCallArguments args(object); | |
1148 JavaCalls::call(&result, m, &args, THREAD); | |
1149 | |
1150 // done with action, remove ourselves from the list | |
1151 if (!vfst.at_end()) { | |
1152 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element"); | |
1153 thread->set_privileged_stack_top(thread->privileged_stack_top()->next()); | |
1154 } | |
1155 | |
1156 if (HAS_PENDING_EXCEPTION) { | |
1157 pending_exception = Handle(THREAD, PENDING_EXCEPTION); | |
1158 CLEAR_PENDING_EXCEPTION; | |
1159 | |
1142 | 1160 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) && |
1161 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) { | |
0 | 1162 // Throw a java.security.PrivilegedActionException(Exception e) exception |
1163 JavaCallArguments args(pending_exception); | |
2177
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1164 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(), |
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1165 vmSymbols::exception_void_signature(), |
0 | 1166 &args); |
1167 } | |
1168 } | |
1169 | |
1170 if (pending_exception.not_null()) THROW_OOP_0(pending_exception()); | |
1171 return JNIHandles::make_local(env, (oop) result.get_jobject()); | |
1172 JVM_END | |
1173 | |
1174 | |
1175 // Returns the inherited_access_control_context field of the running thread. | |
1176 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls)) | |
1177 JVMWrapper("JVM_GetInheritedAccessControlContext"); | |
1178 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj()); | |
1179 return JNIHandles::make_local(env, result); | |
1180 JVM_END | |
1181 | |
1182 class RegisterArrayForGC { | |
1183 private: | |
1184 JavaThread *_thread; | |
1185 public: | |
1186 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) { | |
1187 _thread = thread; | |
1188 _thread->register_array_for_gc(array); | |
1189 } | |
1190 | |
1191 ~RegisterArrayForGC() { | |
1192 _thread->register_array_for_gc(NULL); | |
1193 } | |
1194 }; | |
1195 | |
1196 | |
1197 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls)) | |
1198 JVMWrapper("JVM_GetStackAccessControlContext"); | |
1199 if (!UsePrivilegedStack) return NULL; | |
1200 | |
1201 ResourceMark rm(THREAD); | |
1202 GrowableArray<oop>* local_array = new GrowableArray<oop>(12); | |
1203 JvmtiVMObjectAllocEventCollector oam; | |
1204 | |
1205 // count the protection domains on the execution stack. We collapse | |
1206 // duplicate consecutive protection domains into a single one, as | |
1207 // well as stopping when we hit a privileged frame. | |
1208 | |
1209 // Use vframeStream to iterate through Java frames | |
1210 vframeStream vfst(thread); | |
1211 | |
1212 oop previous_protection_domain = NULL; | |
1213 Handle privileged_context(thread, NULL); | |
1214 bool is_privileged = false; | |
1215 oop protection_domain = NULL; | |
1216 | |
1217 for(; !vfst.at_end(); vfst.next()) { | |
1218 // get method of frame | |
1219 methodOop method = vfst.method(); | |
1220 intptr_t* frame_id = vfst.frame_id(); | |
1221 | |
1222 // check the privileged frames to see if we have a match | |
1223 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) { | |
1224 // this frame is privileged | |
1225 is_privileged = true; | |
1226 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context()); | |
1227 protection_domain = thread->privileged_stack_top()->protection_domain(); | |
1228 } else { | |
1229 protection_domain = instanceKlass::cast(method->method_holder())->protection_domain(); | |
1230 } | |
1231 | |
1232 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) { | |
1233 local_array->push(protection_domain); | |
1234 previous_protection_domain = protection_domain; | |
1235 } | |
1236 | |
1237 if (is_privileged) break; | |
1238 } | |
1239 | |
1240 | |
1241 // either all the domains on the stack were system domains, or | |
1242 // we had a privileged system domain | |
1243 if (local_array->is_empty()) { | |
1244 if (is_privileged && privileged_context.is_null()) return NULL; | |
1245 | |
1246 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL); | |
1247 return JNIHandles::make_local(env, result); | |
1248 } | |
1249 | |
1250 // the resource area must be registered in case of a gc | |
1251 RegisterArrayForGC ragc(thread, local_array); | |
1142 | 1252 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(), |
0 | 1253 local_array->length(), CHECK_NULL); |
1254 objArrayHandle h_context(thread, context); | |
1255 for (int index = 0; index < local_array->length(); index++) { | |
1256 h_context->obj_at_put(index, local_array->at(index)); | |
1257 } | |
1258 | |
1259 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL); | |
1260 | |
1261 return JNIHandles::make_local(env, result); | |
1262 JVM_END | |
1263 | |
1264 | |
1265 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls)) | |
1266 JVMWrapper("JVM_IsArrayClass"); | |
1267 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1268 return (k != NULL) && Klass::cast(k)->oop_is_javaArray() ? true : false; | |
1269 JVM_END | |
1270 | |
1271 | |
1272 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls)) | |
1273 JVMWrapper("JVM_IsPrimitiveClass"); | |
1274 oop mirror = JNIHandles::resolve_non_null(cls); | |
1275 return (jboolean) java_lang_Class::is_primitive(mirror); | |
1276 JVM_END | |
1277 | |
1278 | |
1279 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls)) | |
1280 JVMWrapper("JVM_GetComponentType"); | |
1281 oop mirror = JNIHandles::resolve_non_null(cls); | |
1282 oop result = Reflection::array_component_type(mirror, CHECK_NULL); | |
1283 return (jclass) JNIHandles::make_local(env, result); | |
1284 JVM_END | |
1285 | |
1286 | |
1287 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls)) | |
1288 JVMWrapper("JVM_GetClassModifiers"); | |
1289 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1290 // Primitive type | |
1291 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; | |
1292 } | |
1293 | |
1294 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); | |
1295 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0)); | |
1296 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK"); | |
1297 return k->modifier_flags(); | |
1298 JVM_END | |
1299 | |
1300 | |
1301 // Inner class reflection /////////////////////////////////////////////////////////////////////////////// | |
1302 | |
1303 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass)) | |
1304 const int inner_class_info_index = 0; | |
1305 const int outer_class_info_index = 1; | |
1306 | |
1307 JvmtiVMObjectAllocEventCollector oam; | |
1308 // ofClass is a reference to a java_lang_Class object. The mirror object | |
1309 // of an instanceKlass | |
1310 | |
1311 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || | |
1312 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) { | |
1142 | 1313 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); |
0 | 1314 return (jobjectArray)JNIHandles::make_local(env, result); |
1315 } | |
1316 | |
1317 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
1318 | |
1319 if (k->inner_classes()->length() == 0) { | |
1320 // Neither an inner nor outer class | |
1142 | 1321 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); |
0 | 1322 return (jobjectArray)JNIHandles::make_local(env, result); |
1323 } | |
1324 | |
1325 // find inner class info | |
1326 typeArrayHandle icls(thread, k->inner_classes()); | |
1327 constantPoolHandle cp(thread, k->constants()); | |
1328 int length = icls->length(); | |
1329 | |
1330 // Allocate temp. result array | |
1142 | 1331 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL); |
0 | 1332 objArrayHandle result (THREAD, r); |
1333 int members = 0; | |
1334 | |
1335 for(int i = 0; i < length; i += 4) { | |
1336 int ioff = icls->ushort_at(i + inner_class_info_index); | |
1337 int ooff = icls->ushort_at(i + outer_class_info_index); | |
1338 | |
1339 if (ioff != 0 && ooff != 0) { | |
1340 // Check to see if the name matches the class we're looking for | |
1341 // before attempting to find the class. | |
1342 if (cp->klass_name_at_matches(k, ooff)) { | |
1343 klassOop outer_klass = cp->klass_at(ooff, CHECK_NULL); | |
1344 if (outer_klass == k()) { | |
1345 klassOop ik = cp->klass_at(ioff, CHECK_NULL); | |
1346 instanceKlassHandle inner_klass (THREAD, ik); | |
1347 | |
1348 // Throws an exception if outer klass has not declared k as | |
1349 // an inner klass | |
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1350 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL); |
0 | 1351 |
1352 result->obj_at_put(members, inner_klass->java_mirror()); | |
1353 members++; | |
1354 } | |
1355 } | |
1356 } | |
1357 } | |
1358 | |
1359 if (members != length) { | |
1360 // Return array of right length | |
1142 | 1361 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL); |
0 | 1362 for(int i = 0; i < members; i++) { |
1363 res->obj_at_put(i, result->obj_at(i)); | |
1364 } | |
1365 return (jobjectArray)JNIHandles::make_local(env, res); | |
1366 } | |
1367 | |
1368 return (jobjectArray)JNIHandles::make_local(env, result()); | |
1369 JVM_END | |
1370 | |
1371 | |
1372 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass)) | |
665
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1373 { |
0 | 1374 // ofClass is a reference to a java_lang_Class object. |
1375 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || | |
1376 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) { | |
1377 return NULL; | |
1378 } | |
1379 | |
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1380 bool inner_is_member = false; |
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1381 klassOop outer_klass |
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1382 = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)) |
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1383 )->compute_enclosing_class(&inner_is_member, CHECK_NULL); |
665
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1384 if (outer_klass == NULL) return NULL; // already a top-level class |
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1385 if (!inner_is_member) return NULL; // an anonymous class (inside a method) |
665
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1386 return (jclass) JNIHandles::make_local(env, Klass::cast(outer_klass)->java_mirror()); |
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1387 } |
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1388 JVM_END |
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1389 |
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1390 // should be in instanceKlass.cpp, but is here for historical reasons |
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1391 klassOop instanceKlass::compute_enclosing_class_impl(instanceKlassHandle k, |
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1392 bool* inner_is_member, |
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1393 TRAPS) { |
665
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1394 Thread* thread = THREAD; |
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1395 const int inner_class_info_index = inner_class_inner_class_info_offset; |
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1396 const int outer_class_info_index = inner_class_outer_class_info_offset; |
0 | 1397 |
1398 if (k->inner_classes()->length() == 0) { | |
1399 // No inner class info => no declaring class | |
1400 return NULL; | |
1401 } | |
1402 | |
1403 typeArrayHandle i_icls(thread, k->inner_classes()); | |
1404 constantPoolHandle i_cp(thread, k->constants()); | |
1405 int i_length = i_icls->length(); | |
1406 | |
1407 bool found = false; | |
1408 klassOop ok; | |
1409 instanceKlassHandle outer_klass; | |
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1410 *inner_is_member = false; |
0 | 1411 |
1412 // Find inner_klass attribute | |
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1413 for (int i = 0; i < i_length && !found; i += inner_class_next_offset) { |
0 | 1414 int ioff = i_icls->ushort_at(i + inner_class_info_index); |
1415 int ooff = i_icls->ushort_at(i + outer_class_info_index); | |
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1416 int noff = i_icls->ushort_at(i + inner_class_inner_name_offset); |
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1417 if (ioff != 0) { |
0 | 1418 // Check to see if the name matches the class we're looking for |
1419 // before attempting to find the class. | |
1420 if (i_cp->klass_name_at_matches(k, ioff)) { | |
1421 klassOop inner_klass = i_cp->klass_at(ioff, CHECK_NULL); | |
665
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1422 found = (k() == inner_klass); |
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1423 if (found && ooff != 0) { |
0 | 1424 ok = i_cp->klass_at(ooff, CHECK_NULL); |
1425 outer_klass = instanceKlassHandle(thread, ok); | |
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1426 *inner_is_member = true; |
0 | 1427 } |
1428 } | |
1429 } | |
1430 } | |
1431 | |
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1432 if (found && outer_klass.is_null()) { |
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1433 // It may be anonymous; try for that. |
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1434 int encl_method_class_idx = k->enclosing_method_class_index(); |
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1435 if (encl_method_class_idx != 0) { |
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1436 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL); |
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1437 outer_klass = instanceKlassHandle(thread, ok); |
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1438 *inner_is_member = false; |
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1439 } |
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1440 } |
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1441 |
0 | 1442 // If no inner class attribute found for this class. |
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1443 if (outer_klass.is_null()) return NULL; |
0 | 1444 |
1445 // Throws an exception if outer klass has not declared k as an inner klass | |
665
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1446 // We need evidence that each klass knows about the other, or else |
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1447 // the system could allow a spoof of an inner class to gain access rights. |
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1448 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL); |
665
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1449 return outer_klass(); |
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1450 } |
0 | 1451 |
1452 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls)) | |
1453 assert (cls != NULL, "illegal class"); | |
1454 JVMWrapper("JVM_GetClassSignature"); | |
1455 JvmtiVMObjectAllocEventCollector oam; | |
1456 ResourceMark rm(THREAD); | |
1457 // Return null for arrays and primatives | |
1458 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
1459 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
1460 if (Klass::cast(k)->oop_is_instance()) { | |
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1461 Symbol* sym = instanceKlass::cast(k)->generic_signature(); |
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1462 if (sym == NULL) return NULL; |
0 | 1463 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); |
1464 return (jstring) JNIHandles::make_local(env, str()); | |
1465 } | |
1466 } | |
1467 return NULL; | |
1468 JVM_END | |
1469 | |
1470 | |
1471 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls)) | |
1472 assert (cls != NULL, "illegal class"); | |
1473 JVMWrapper("JVM_GetClassAnnotations"); | |
1474 ResourceMark rm(THREAD); | |
1475 // Return null for arrays and primitives | |
1476 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
1477 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
1478 if (Klass::cast(k)->oop_is_instance()) { | |
1479 return (jbyteArray) JNIHandles::make_local(env, | |
1480 instanceKlass::cast(k)->class_annotations()); | |
1481 } | |
1482 } | |
1483 return NULL; | |
1484 JVM_END | |
1485 | |
1486 | |
1487 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field)) | |
1488 assert(field != NULL, "illegal field"); | |
1489 JVMWrapper("JVM_GetFieldAnnotations"); | |
1490 | |
1491 // some of this code was adapted from from jni_FromReflectedField | |
1492 | |
1493 // field is a handle to a java.lang.reflect.Field object | |
1494 oop reflected = JNIHandles::resolve_non_null(field); | |
1495 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
1496 klassOop k = java_lang_Class::as_klassOop(mirror); | |
1497 int slot = java_lang_reflect_Field::slot(reflected); | |
1498 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
1499 | |
1500 fieldDescriptor fd; | |
1501 KlassHandle kh(THREAD, k); | |
3938 | 1502 intptr_t offset = instanceKlass::cast(kh())->field_offset(slot); |
0 | 1503 |
1504 if (modifiers & JVM_ACC_STATIC) { | |
1505 // for static fields we only look in the current class | |
1506 if (!instanceKlass::cast(kh())->find_local_field_from_offset(offset, | |
1507 true, &fd)) { | |
1508 assert(false, "cannot find static field"); | |
1509 return NULL; // robustness | |
1510 } | |
1511 } else { | |
1512 // for instance fields we start with the current class and work | |
1513 // our way up through the superclass chain | |
1514 if (!instanceKlass::cast(kh())->find_field_from_offset(offset, false, | |
1515 &fd)) { | |
1516 assert(false, "cannot find instance field"); | |
1517 return NULL; // robustness | |
1518 } | |
1519 } | |
1520 | |
1521 return (jbyteArray) JNIHandles::make_local(env, fd.annotations()); | |
1522 JVM_END | |
1523 | |
1524 | |
1525 static methodOop jvm_get_method_common(jobject method, TRAPS) { | |
1526 // some of this code was adapted from from jni_FromReflectedMethod | |
1527 | |
1528 oop reflected = JNIHandles::resolve_non_null(method); | |
1529 oop mirror = NULL; | |
1530 int slot = 0; | |
1531 | |
1142 | 1532 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { |
0 | 1533 mirror = java_lang_reflect_Constructor::clazz(reflected); |
1534 slot = java_lang_reflect_Constructor::slot(reflected); | |
1535 } else { | |
1142 | 1536 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), |
0 | 1537 "wrong type"); |
1538 mirror = java_lang_reflect_Method::clazz(reflected); | |
1539 slot = java_lang_reflect_Method::slot(reflected); | |
1540 } | |
1541 klassOop k = java_lang_Class::as_klassOop(mirror); | |
1542 | |
1543 KlassHandle kh(THREAD, k); | |
1544 methodOop m = instanceKlass::cast(kh())->method_with_idnum(slot); | |
1545 if (m == NULL) { | |
1546 assert(false, "cannot find method"); | |
1547 return NULL; // robustness | |
1548 } | |
1549 | |
1550 return m; | |
1551 } | |
1552 | |
1553 | |
1554 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method)) | |
1555 JVMWrapper("JVM_GetMethodAnnotations"); | |
1556 | |
1557 // method is a handle to a java.lang.reflect.Method object | |
1558 methodOop m = jvm_get_method_common(method, CHECK_NULL); | |
1559 return (jbyteArray) JNIHandles::make_local(env, m->annotations()); | |
1560 JVM_END | |
1561 | |
1562 | |
1563 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method)) | |
1564 JVMWrapper("JVM_GetMethodDefaultAnnotationValue"); | |
1565 | |
1566 // method is a handle to a java.lang.reflect.Method object | |
1567 methodOop m = jvm_get_method_common(method, CHECK_NULL); | |
1568 return (jbyteArray) JNIHandles::make_local(env, m->annotation_default()); | |
1569 JVM_END | |
1570 | |
1571 | |
1572 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method)) | |
1573 JVMWrapper("JVM_GetMethodParameterAnnotations"); | |
1574 | |
1575 // method is a handle to a java.lang.reflect.Method object | |
1576 methodOop m = jvm_get_method_common(method, CHECK_NULL); | |
1577 return (jbyteArray) JNIHandles::make_local(env, m->parameter_annotations()); | |
1578 JVM_END | |
1579 | |
1580 | |
1581 // New (JDK 1.4) reflection implementation ///////////////////////////////////// | |
1582 | |
1583 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly)) | |
1584 { | |
1585 JVMWrapper("JVM_GetClassDeclaredFields"); | |
1586 JvmtiVMObjectAllocEventCollector oam; | |
1587 | |
1588 // Exclude primitive types and array types | |
1589 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || | |
1590 Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { | |
1591 // Return empty array | |
1142 | 1592 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL); |
0 | 1593 return (jobjectArray) JNIHandles::make_local(env, res); |
1594 } | |
1595 | |
1596 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
1597 constantPoolHandle cp(THREAD, k->constants()); | |
1598 | |
1599 // Ensure class is linked | |
1600 k->link_class(CHECK_NULL); | |
1601 | |
1602 // 4496456 We need to filter out java.lang.Throwable.backtrace | |
1603 bool skip_backtrace = false; | |
1604 | |
1605 // Allocate result | |
1606 int num_fields; | |
1607 | |
1608 if (publicOnly) { | |
1609 num_fields = 0; | |
3938 | 1610 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) { |
1611 if (fs.access_flags().is_public()) ++num_fields; | |
0 | 1612 } |
1613 } else { | |
3938 | 1614 num_fields = k->java_fields_count(); |
0 | 1615 |
1142 | 1616 if (k() == SystemDictionary::Throwable_klass()) { |
0 | 1617 num_fields--; |
1618 skip_backtrace = true; | |
1619 } | |
1620 } | |
1621 | |
1142 | 1622 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL); |
0 | 1623 objArrayHandle result (THREAD, r); |
1624 | |
1625 int out_idx = 0; | |
1626 fieldDescriptor fd; | |
3938 | 1627 for (JavaFieldStream fs(k); !fs.done(); fs.next()) { |
0 | 1628 if (skip_backtrace) { |
1629 // 4496456 skip java.lang.Throwable.backtrace | |
3938 | 1630 int offset = fs.offset(); |
0 | 1631 if (offset == java_lang_Throwable::get_backtrace_offset()) continue; |
1632 } | |
1633 | |
3938 | 1634 if (!publicOnly || fs.access_flags().is_public()) { |
1635 fd.initialize(k(), fs.index()); | |
0 | 1636 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); |
1637 result->obj_at_put(out_idx, field); | |
1638 ++out_idx; | |
1639 } | |
1640 } | |
1641 assert(out_idx == num_fields, "just checking"); | |
1642 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1643 } | |
1644 JVM_END | |
1645 | |
1646 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) | |
1647 { | |
1648 JVMWrapper("JVM_GetClassDeclaredMethods"); | |
1649 JvmtiVMObjectAllocEventCollector oam; | |
1650 | |
1651 // Exclude primitive types and array types | |
1652 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) | |
1653 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { | |
1654 // Return empty array | |
1142 | 1655 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL); |
0 | 1656 return (jobjectArray) JNIHandles::make_local(env, res); |
1657 } | |
1658 | |
1659 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
1660 | |
1661 // Ensure class is linked | |
1662 k->link_class(CHECK_NULL); | |
1663 | |
1664 objArrayHandle methods (THREAD, k->methods()); | |
1665 int methods_length = methods->length(); | |
1666 int num_methods = 0; | |
1667 | |
1668 int i; | |
1669 for (i = 0; i < methods_length; i++) { | |
1670 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); | |
1671 if (!method->is_initializer()) { | |
1672 if (!publicOnly || method->is_public()) { | |
1673 ++num_methods; | |
1674 } | |
1675 } | |
1676 } | |
1677 | |
1678 // Allocate result | |
1142 | 1679 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL); |
0 | 1680 objArrayHandle result (THREAD, r); |
1681 | |
1682 int out_idx = 0; | |
1683 for (i = 0; i < methods_length; i++) { | |
1684 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); | |
1685 if (!method->is_initializer()) { | |
1686 if (!publicOnly || method->is_public()) { | |
1687 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); | |
1688 result->obj_at_put(out_idx, m); | |
1689 ++out_idx; | |
1690 } | |
1691 } | |
1692 } | |
1693 assert(out_idx == num_methods, "just checking"); | |
1694 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1695 } | |
1696 JVM_END | |
1697 | |
1698 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) | |
1699 { | |
1700 JVMWrapper("JVM_GetClassDeclaredConstructors"); | |
1701 JvmtiVMObjectAllocEventCollector oam; | |
1702 | |
1703 // Exclude primitive types and array types | |
1704 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) | |
1705 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { | |
1706 // Return empty array | |
1142 | 1707 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL); |
0 | 1708 return (jobjectArray) JNIHandles::make_local(env, res); |
1709 } | |
1710 | |
1711 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
1712 | |
1713 // Ensure class is linked | |
1714 k->link_class(CHECK_NULL); | |
1715 | |
1716 objArrayHandle methods (THREAD, k->methods()); | |
1717 int methods_length = methods->length(); | |
1718 int num_constructors = 0; | |
1719 | |
1720 int i; | |
1721 for (i = 0; i < methods_length; i++) { | |
1722 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); | |
1723 if (method->is_initializer() && !method->is_static()) { | |
1724 if (!publicOnly || method->is_public()) { | |
1725 ++num_constructors; | |
1726 } | |
1727 } | |
1728 } | |
1729 | |
1730 // Allocate result | |
1142 | 1731 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL); |
0 | 1732 objArrayHandle result(THREAD, r); |
1733 | |
1734 int out_idx = 0; | |
1735 for (i = 0; i < methods_length; i++) { | |
1736 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); | |
1737 if (method->is_initializer() && !method->is_static()) { | |
1738 if (!publicOnly || method->is_public()) { | |
1739 oop m = Reflection::new_constructor(method, CHECK_NULL); | |
1740 result->obj_at_put(out_idx, m); | |
1741 ++out_idx; | |
1742 } | |
1743 } | |
1744 } | |
1745 assert(out_idx == num_constructors, "just checking"); | |
1746 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1747 } | |
1748 JVM_END | |
1749 | |
1750 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls)) | |
1751 { | |
1752 JVMWrapper("JVM_GetClassAccessFlags"); | |
1753 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1754 // Primitive type | |
1755 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; | |
1756 } | |
1757 | |
1758 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); | |
1759 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS; | |
1760 } | |
1761 JVM_END | |
1762 | |
1763 | |
1764 // Constant pool access ////////////////////////////////////////////////////////// | |
1765 | |
1766 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls)) | |
1767 { | |
1768 JVMWrapper("JVM_GetClassConstantPool"); | |
1769 JvmtiVMObjectAllocEventCollector oam; | |
1770 | |
1771 // Return null for primitives and arrays | |
1772 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1773 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1774 if (Klass::cast(k)->oop_is_instance()) { | |
1775 instanceKlassHandle k_h(THREAD, k); | |
1776 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL); | |
1777 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants()); | |
1778 return JNIHandles::make_local(jcp()); | |
1779 } | |
1780 } | |
1781 return NULL; | |
1782 } | |
1783 JVM_END | |
1784 | |
1785 | |
1786 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool)) | |
1787 { | |
1788 JVMWrapper("JVM_ConstantPoolGetSize"); | |
1789 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1790 return cp->length(); | |
1791 } | |
1792 JVM_END | |
1793 | |
1794 | |
1795 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { | |
1796 if (!cp->is_within_bounds(index)) { | |
1797 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); | |
1798 } | |
1799 } | |
1800 | |
1801 | |
1802 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1803 { | |
1804 JVMWrapper("JVM_ConstantPoolGetClassAt"); | |
1805 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1806 bounds_check(cp, index, CHECK_NULL); | |
1807 constantTag tag = cp->tag_at(index); | |
1808 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
1809 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1810 } | |
1811 klassOop k = cp->klass_at(index, CHECK_NULL); | |
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1812 return (jclass) JNIHandles::make_local(k->java_mirror()); |
0 | 1813 } |
1814 JVM_END | |
1815 | |
1816 | |
1817 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1818 { | |
1819 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded"); | |
1820 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1821 bounds_check(cp, index, CHECK_NULL); | |
1822 constantTag tag = cp->tag_at(index); | |
1823 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
1824 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1825 } | |
1826 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index); | |
1827 if (k == NULL) return NULL; | |
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1828 return (jclass) JNIHandles::make_local(k->java_mirror()); |
0 | 1829 } |
1830 JVM_END | |
1831 | |
1832 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { | |
1833 constantTag tag = cp->tag_at(index); | |
1834 if (!tag.is_method() && !tag.is_interface_method()) { | |
1835 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1836 } | |
1837 int klass_ref = cp->uncached_klass_ref_index_at(index); | |
1838 klassOop k_o; | |
1839 if (force_resolution) { | |
1840 k_o = cp->klass_at(klass_ref, CHECK_NULL); | |
1841 } else { | |
1842 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref); | |
1843 if (k_o == NULL) return NULL; | |
1844 } | |
1845 instanceKlassHandle k(THREAD, k_o); | |
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1846 Symbol* name = cp->uncached_name_ref_at(index); |
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1847 Symbol* sig = cp->uncached_signature_ref_at(index); |
0 | 1848 methodHandle m (THREAD, k->find_method(name, sig)); |
1849 if (m.is_null()) { | |
1850 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class"); | |
1851 } | |
1852 oop method; | |
1853 if (!m->is_initializer() || m->is_static()) { | |
1854 method = Reflection::new_method(m, true, true, CHECK_NULL); | |
1855 } else { | |
1856 method = Reflection::new_constructor(m, CHECK_NULL); | |
1857 } | |
1858 return JNIHandles::make_local(method); | |
1859 } | |
1860 | |
1861 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1862 { | |
1863 JVMWrapper("JVM_ConstantPoolGetMethodAt"); | |
1864 JvmtiVMObjectAllocEventCollector oam; | |
1865 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1866 bounds_check(cp, index, CHECK_NULL); | |
1867 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL); | |
1868 return res; | |
1869 } | |
1870 JVM_END | |
1871 | |
1872 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1873 { | |
1874 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded"); | |
1875 JvmtiVMObjectAllocEventCollector oam; | |
1876 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1877 bounds_check(cp, index, CHECK_NULL); | |
1878 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL); | |
1879 return res; | |
1880 } | |
1881 JVM_END | |
1882 | |
1883 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { | |
1884 constantTag tag = cp->tag_at(index); | |
1885 if (!tag.is_field()) { | |
1886 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1887 } | |
1888 int klass_ref = cp->uncached_klass_ref_index_at(index); | |
1889 klassOop k_o; | |
1890 if (force_resolution) { | |
1891 k_o = cp->klass_at(klass_ref, CHECK_NULL); | |
1892 } else { | |
1893 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref); | |
1894 if (k_o == NULL) return NULL; | |
1895 } | |
1896 instanceKlassHandle k(THREAD, k_o); | |
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1897 Symbol* name = cp->uncached_name_ref_at(index); |
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1898 Symbol* sig = cp->uncached_signature_ref_at(index); |
0 | 1899 fieldDescriptor fd; |
1900 klassOop target_klass = k->find_field(name, sig, &fd); | |
1901 if (target_klass == NULL) { | |
1902 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class"); | |
1903 } | |
1904 oop field = Reflection::new_field(&fd, true, CHECK_NULL); | |
1905 return JNIHandles::make_local(field); | |
1906 } | |
1907 | |
1908 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1909 { | |
1910 JVMWrapper("JVM_ConstantPoolGetFieldAt"); | |
1911 JvmtiVMObjectAllocEventCollector oam; | |
1912 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1913 bounds_check(cp, index, CHECK_NULL); | |
1914 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL); | |
1915 return res; | |
1916 } | |
1917 JVM_END | |
1918 | |
1919 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1920 { | |
1921 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded"); | |
1922 JvmtiVMObjectAllocEventCollector oam; | |
1923 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1924 bounds_check(cp, index, CHECK_NULL); | |
1925 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL); | |
1926 return res; | |
1927 } | |
1928 JVM_END | |
1929 | |
1930 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1931 { | |
1932 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt"); | |
1933 JvmtiVMObjectAllocEventCollector oam; | |
1934 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1935 bounds_check(cp, index, CHECK_NULL); | |
1936 constantTag tag = cp->tag_at(index); | |
1937 if (!tag.is_field_or_method()) { | |
1938 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1939 } | |
1940 int klass_ref = cp->uncached_klass_ref_index_at(index); | |
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1941 Symbol* klass_name = cp->klass_name_at(klass_ref); |
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1942 Symbol* member_name = cp->uncached_name_ref_at(index); |
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1943 Symbol* member_sig = cp->uncached_signature_ref_at(index); |
1142 | 1944 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL); |
0 | 1945 objArrayHandle dest(THREAD, dest_o); |
1946 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL); | |
1947 dest->obj_at_put(0, str()); | |
1948 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); | |
1949 dest->obj_at_put(1, str()); | |
1950 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); | |
1951 dest->obj_at_put(2, str()); | |
1952 return (jobjectArray) JNIHandles::make_local(dest()); | |
1953 } | |
1954 JVM_END | |
1955 | |
1956 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1957 { | |
1958 JVMWrapper("JVM_ConstantPoolGetIntAt"); | |
1959 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1960 bounds_check(cp, index, CHECK_0); | |
1961 constantTag tag = cp->tag_at(index); | |
1962 if (!tag.is_int()) { | |
1963 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1964 } | |
1965 return cp->int_at(index); | |
1966 } | |
1967 JVM_END | |
1968 | |
1969 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1970 { | |
1971 JVMWrapper("JVM_ConstantPoolGetLongAt"); | |
1972 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1973 bounds_check(cp, index, CHECK_(0L)); | |
1974 constantTag tag = cp->tag_at(index); | |
1975 if (!tag.is_long()) { | |
1976 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1977 } | |
1978 return cp->long_at(index); | |
1979 } | |
1980 JVM_END | |
1981 | |
1982 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1983 { | |
1984 JVMWrapper("JVM_ConstantPoolGetFloatAt"); | |
1985 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1986 bounds_check(cp, index, CHECK_(0.0f)); | |
1987 constantTag tag = cp->tag_at(index); | |
1988 if (!tag.is_float()) { | |
1989 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1990 } | |
1991 return cp->float_at(index); | |
1992 } | |
1993 JVM_END | |
1994 | |
1995 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1996 { | |
1997 JVMWrapper("JVM_ConstantPoolGetDoubleAt"); | |
1998 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1999 bounds_check(cp, index, CHECK_(0.0)); | |
2000 constantTag tag = cp->tag_at(index); | |
2001 if (!tag.is_double()) { | |
2002 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2003 } | |
2004 return cp->double_at(index); | |
2005 } | |
2006 JVM_END | |
2007 | |
2008 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
2009 { | |
2010 JVMWrapper("JVM_ConstantPoolGetStringAt"); | |
2011 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
2012 bounds_check(cp, index, CHECK_NULL); | |
2013 constantTag tag = cp->tag_at(index); | |
2014 if (!tag.is_string() && !tag.is_unresolved_string()) { | |
2015 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2016 } | |
2017 oop str = cp->string_at(index, CHECK_NULL); | |
2018 return (jstring) JNIHandles::make_local(str); | |
2019 } | |
2020 JVM_END | |
2021 | |
2022 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
2023 { | |
2024 JVMWrapper("JVM_ConstantPoolGetUTF8At"); | |
2025 JvmtiVMObjectAllocEventCollector oam; | |
2026 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
2027 bounds_check(cp, index, CHECK_NULL); | |
2028 constantTag tag = cp->tag_at(index); | |
2029 if (!tag.is_symbol()) { | |
2030 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2031 } | |
2177
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2032 Symbol* sym = cp->symbol_at(index); |
0 | 2033 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); |
2034 return (jstring) JNIHandles::make_local(str()); | |
2035 } | |
2036 JVM_END | |
2037 | |
2038 | |
2039 // Assertion support. ////////////////////////////////////////////////////////// | |
2040 | |
2041 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls)) | |
2042 JVMWrapper("JVM_DesiredAssertionStatus"); | |
2043 assert(cls != NULL, "bad class"); | |
2044 | |
2045 oop r = JNIHandles::resolve(cls); | |
2046 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed"); | |
2047 if (java_lang_Class::is_primitive(r)) return false; | |
2048 | |
2049 klassOop k = java_lang_Class::as_klassOop(r); | |
2050 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass"); | |
2051 if (! Klass::cast(k)->oop_is_instance()) return false; | |
2052 | |
2053 ResourceMark rm(THREAD); | |
2054 const char* name = Klass::cast(k)->name()->as_C_string(); | |
2055 bool system_class = Klass::cast(k)->class_loader() == NULL; | |
2056 return JavaAssertions::enabled(name, system_class); | |
2057 | |
2058 JVM_END | |
2059 | |
2060 | |
2061 // Return a new AssertionStatusDirectives object with the fields filled in with | |
2062 // command-line assertion arguments (i.e., -ea, -da). | |
2063 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused)) | |
2064 JVMWrapper("JVM_AssertionStatusDirectives"); | |
2065 JvmtiVMObjectAllocEventCollector oam; | |
2066 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL); | |
2067 return JNIHandles::make_local(env, asd); | |
2068 JVM_END | |
2069 | |
2070 // Verification //////////////////////////////////////////////////////////////////////////////// | |
2071 | |
2072 // Reflection for the verifier ///////////////////////////////////////////////////////////////// | |
2073 | |
2074 // RedefineClasses support: bug 6214132 caused verification to fail. | |
2075 // All functions from this section should call the jvmtiThreadSate function: | |
2076 // klassOop class_to_verify_considering_redefinition(klassOop klass). | |
2077 // The function returns a klassOop of the _scratch_class if the verifier | |
2078 // was invoked in the middle of the class redefinition. | |
2079 // Otherwise it returns its argument value which is the _the_class klassOop. | |
2080 // Please, refer to the description in the jvmtiThreadSate.hpp. | |
2081 | |
2082 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls)) | |
2083 JVMWrapper("JVM_GetClassNameUTF"); | |
2084 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2085 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2086 return Klass::cast(k)->name()->as_utf8(); | |
2087 JVM_END | |
2088 | |
2089 | |
2090 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types)) | |
2091 JVMWrapper("JVM_GetClassCPTypes"); | |
2092 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2093 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2094 // types will have length zero if this is not an instanceKlass | |
2095 // (length is determined by call to JVM_GetClassCPEntriesCount) | |
2096 if (Klass::cast(k)->oop_is_instance()) { | |
2097 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2098 for (int index = cp->length() - 1; index >= 0; index--) { | |
2099 constantTag tag = cp->tag_at(index); | |
2100 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : | |
2101 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value(); | |
2102 } | |
2103 } | |
2104 JVM_END | |
2105 | |
2106 | |
2107 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls)) | |
2108 JVMWrapper("JVM_GetClassCPEntriesCount"); | |
2109 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2110 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2111 if (!Klass::cast(k)->oop_is_instance()) | |
2112 return 0; | |
2113 return instanceKlass::cast(k)->constants()->length(); | |
2114 JVM_END | |
2115 | |
2116 | |
2117 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls)) | |
2118 JVMWrapper("JVM_GetClassFieldsCount"); | |
2119 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2120 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2121 if (!Klass::cast(k)->oop_is_instance()) | |
2122 return 0; | |
3938 | 2123 return instanceKlass::cast(k)->java_fields_count(); |
0 | 2124 JVM_END |
2125 | |
2126 | |
2127 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls)) | |
2128 JVMWrapper("JVM_GetClassMethodsCount"); | |
2129 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2130 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2131 if (!Klass::cast(k)->oop_is_instance()) | |
2132 return 0; | |
2133 return instanceKlass::cast(k)->methods()->length(); | |
2134 JVM_END | |
2135 | |
2136 | |
2137 // The following methods, used for the verifier, are never called with | |
2138 // array klasses, so a direct cast to instanceKlass is safe. | |
2139 // Typically, these methods are called in a loop with bounds determined | |
2140 // by the results of JVM_GetClass{Fields,Methods}Count, which return | |
2141 // zero for arrays. | |
2142 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions)) | |
2143 JVMWrapper("JVM_GetMethodIxExceptionIndexes"); | |
2144 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2145 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2146 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2147 int length = methodOop(method)->checked_exceptions_length(); | |
2148 if (length > 0) { | |
2149 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start(); | |
2150 for (int i = 0; i < length; i++) { | |
2151 exceptions[i] = table[i].class_cp_index; | |
2152 } | |
2153 } | |
2154 JVM_END | |
2155 | |
2156 | |
2157 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index)) | |
2158 JVMWrapper("JVM_GetMethodIxExceptionsCount"); | |
2159 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2160 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2161 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2162 return methodOop(method)->checked_exceptions_length(); | |
2163 JVM_END | |
2164 | |
2165 | |
2166 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code)) | |
2167 JVMWrapper("JVM_GetMethodIxByteCode"); | |
2168 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2169 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2170 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2171 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size()); | |
2172 JVM_END | |
2173 | |
2174 | |
2175 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index)) | |
2176 JVMWrapper("JVM_GetMethodIxByteCodeLength"); | |
2177 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2178 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2179 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2180 return methodOop(method)->code_size(); | |
2181 JVM_END | |
2182 | |
2183 | |
2184 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry)) | |
2185 JVMWrapper("JVM_GetMethodIxExceptionTableEntry"); | |
2186 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2187 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2188 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2189 typeArrayOop extable = methodOop(method)->exception_table(); | |
2190 entry->start_pc = extable->int_at(entry_index * 4); | |
2191 entry->end_pc = extable->int_at(entry_index * 4 + 1); | |
2192 entry->handler_pc = extable->int_at(entry_index * 4 + 2); | |
2193 entry->catchType = extable->int_at(entry_index * 4 + 3); | |
2194 JVM_END | |
2195 | |
2196 | |
2197 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index)) | |
2198 JVMWrapper("JVM_GetMethodIxExceptionTableLength"); | |
2199 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2200 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2201 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2202 return methodOop(method)->exception_table()->length() / 4; | |
2203 JVM_END | |
2204 | |
2205 | |
2206 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index)) | |
2207 JVMWrapper("JVM_GetMethodIxModifiers"); | |
2208 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2209 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2210 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2211 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; | |
2212 JVM_END | |
2213 | |
2214 | |
2215 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index)) | |
2216 JVMWrapper("JVM_GetFieldIxModifiers"); | |
2217 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2218 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
3938 | 2219 return instanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS; |
0 | 2220 JVM_END |
2221 | |
2222 | |
2223 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index)) | |
2224 JVMWrapper("JVM_GetMethodIxLocalsCount"); | |
2225 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2226 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2227 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2228 return methodOop(method)->max_locals(); | |
2229 JVM_END | |
2230 | |
2231 | |
2232 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index)) | |
2233 JVMWrapper("JVM_GetMethodIxArgsSize"); | |
2234 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2235 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2236 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2237 return methodOop(method)->size_of_parameters(); | |
2238 JVM_END | |
2239 | |
2240 | |
2241 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index)) | |
2242 JVMWrapper("JVM_GetMethodIxMaxStack"); | |
2243 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2244 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2245 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2246 return methodOop(method)->max_stack(); | |
2247 JVM_END | |
2248 | |
2249 | |
2250 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index)) | |
2251 JVMWrapper("JVM_IsConstructorIx"); | |
2252 ResourceMark rm(THREAD); | |
2253 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2254 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2255 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2256 return methodOop(method)->name() == vmSymbols::object_initializer_name(); | |
2257 JVM_END | |
2258 | |
2259 | |
2260 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index)) | |
2261 JVMWrapper("JVM_GetMethodIxIxUTF"); | |
2262 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2263 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2264 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2265 return methodOop(method)->name()->as_utf8(); | |
2266 JVM_END | |
2267 | |
2268 | |
2269 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index)) | |
2270 JVMWrapper("JVM_GetMethodIxSignatureUTF"); | |
2271 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2272 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2273 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2274 return methodOop(method)->signature()->as_utf8(); | |
2275 JVM_END | |
2276 | |
2277 /** | |
2278 * All of these JVM_GetCP-xxx methods are used by the old verifier to | |
2279 * read entries in the constant pool. Since the old verifier always | |
2280 * works on a copy of the code, it will not see any rewriting that | |
2281 * may possibly occur in the middle of verification. So it is important | |
2282 * that nothing it calls tries to use the cpCache instead of the raw | |
2283 * constant pool, so we must use cp->uncached_x methods when appropriate. | |
2284 */ | |
2285 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2286 JVMWrapper("JVM_GetCPFieldNameUTF"); | |
2287 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2288 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2289 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2290 switch (cp->tag_at(cp_index).value()) { | |
2291 case JVM_CONSTANT_Fieldref: | |
2292 return cp->uncached_name_ref_at(cp_index)->as_utf8(); | |
2293 default: | |
2294 fatal("JVM_GetCPFieldNameUTF: illegal constant"); | |
2295 } | |
2296 ShouldNotReachHere(); | |
2297 return NULL; | |
2298 JVM_END | |
2299 | |
2300 | |
2301 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2302 JVMWrapper("JVM_GetCPMethodNameUTF"); | |
2303 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2304 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2305 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2306 switch (cp->tag_at(cp_index).value()) { | |
2307 case JVM_CONSTANT_InterfaceMethodref: | |
2308 case JVM_CONSTANT_Methodref: | |
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2309 case JVM_CONSTANT_NameAndType: // for invokedynamic |
0 | 2310 return cp->uncached_name_ref_at(cp_index)->as_utf8(); |
2311 default: | |
2312 fatal("JVM_GetCPMethodNameUTF: illegal constant"); | |
2313 } | |
2314 ShouldNotReachHere(); | |
2315 return NULL; | |
2316 JVM_END | |
2317 | |
2318 | |
2319 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2320 JVMWrapper("JVM_GetCPMethodSignatureUTF"); | |
2321 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2322 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2323 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2324 switch (cp->tag_at(cp_index).value()) { | |
2325 case JVM_CONSTANT_InterfaceMethodref: | |
2326 case JVM_CONSTANT_Methodref: | |
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|
2327 case JVM_CONSTANT_NameAndType: // for invokedynamic |
0 | 2328 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); |
2329 default: | |
2330 fatal("JVM_GetCPMethodSignatureUTF: illegal constant"); | |
2331 } | |
2332 ShouldNotReachHere(); | |
2333 return NULL; | |
2334 JVM_END | |
2335 | |
2336 | |
2337 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2338 JVMWrapper("JVM_GetCPFieldSignatureUTF"); | |
2339 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2340 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2341 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2342 switch (cp->tag_at(cp_index).value()) { | |
2343 case JVM_CONSTANT_Fieldref: | |
2344 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); | |
2345 default: | |
2346 fatal("JVM_GetCPFieldSignatureUTF: illegal constant"); | |
2347 } | |
2348 ShouldNotReachHere(); | |
2349 return NULL; | |
2350 JVM_END | |
2351 | |
2352 | |
2353 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2354 JVMWrapper("JVM_GetCPClassNameUTF"); | |
2355 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2356 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2357 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
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2358 Symbol* classname = cp->klass_name_at(cp_index); |
0 | 2359 return classname->as_utf8(); |
2360 JVM_END | |
2361 | |
2362 | |
2363 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2364 JVMWrapper("JVM_GetCPFieldClassNameUTF"); | |
2365 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2366 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2367 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2368 switch (cp->tag_at(cp_index).value()) { | |
2369 case JVM_CONSTANT_Fieldref: { | |
2370 int class_index = cp->uncached_klass_ref_index_at(cp_index); | |
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|
2371 Symbol* classname = cp->klass_name_at(class_index); |
0 | 2372 return classname->as_utf8(); |
2373 } | |
2374 default: | |
2375 fatal("JVM_GetCPFieldClassNameUTF: illegal constant"); | |
2376 } | |
2377 ShouldNotReachHere(); | |
2378 return NULL; | |
2379 JVM_END | |
2380 | |
2381 | |
2382 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2383 JVMWrapper("JVM_GetCPMethodClassNameUTF"); | |
2384 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2385 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2386 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2387 switch (cp->tag_at(cp_index).value()) { | |
2388 case JVM_CONSTANT_Methodref: | |
2389 case JVM_CONSTANT_InterfaceMethodref: { | |
2390 int class_index = cp->uncached_klass_ref_index_at(cp_index); | |
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2391 Symbol* classname = cp->klass_name_at(class_index); |
0 | 2392 return classname->as_utf8(); |
2393 } | |
2394 default: | |
2395 fatal("JVM_GetCPMethodClassNameUTF: illegal constant"); | |
2396 } | |
2397 ShouldNotReachHere(); | |
2398 return NULL; | |
2399 JVM_END | |
2400 | |
2401 | |
3938 | 2402 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) |
0 | 2403 JVMWrapper("JVM_GetCPFieldModifiers"); |
2404 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2405 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls)); | |
2406 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2407 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); | |
2408 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2409 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants(); | |
2410 switch (cp->tag_at(cp_index).value()) { | |
2411 case JVM_CONSTANT_Fieldref: { | |
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2412 Symbol* name = cp->uncached_name_ref_at(cp_index); |
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2413 Symbol* signature = cp->uncached_signature_ref_at(cp_index); |
3938 | 2414 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) { |
2415 if (fs.name() == name && fs.signature() == signature) { | |
2416 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
0 | 2417 } |
2418 } | |
2419 return -1; | |
2420 } | |
2421 default: | |
2422 fatal("JVM_GetCPFieldModifiers: illegal constant"); | |
2423 } | |
2424 ShouldNotReachHere(); | |
2425 return 0; | |
2426 JVM_END | |
2427 | |
2428 | |
2429 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) | |
2430 JVMWrapper("JVM_GetCPMethodModifiers"); | |
2431 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2432 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls)); | |
2433 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2434 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); | |
2435 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2436 switch (cp->tag_at(cp_index).value()) { | |
2437 case JVM_CONSTANT_Methodref: | |
2438 case JVM_CONSTANT_InterfaceMethodref: { | |
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2439 Symbol* name = cp->uncached_name_ref_at(cp_index); |
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6990754: Use native memory and reference counting to implement SymbolTable
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|
2440 Symbol* signature = cp->uncached_signature_ref_at(cp_index); |
0 | 2441 objArrayOop methods = instanceKlass::cast(k_called)->methods(); |
2442 int methods_count = methods->length(); | |
2443 for (int i = 0; i < methods_count; i++) { | |
2444 methodOop method = methodOop(methods->obj_at(i)); | |
2445 if (method->name() == name && method->signature() == signature) { | |
2446 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; | |
2447 } | |
2448 } | |
2449 return -1; | |
2450 } | |
2451 default: | |
2452 fatal("JVM_GetCPMethodModifiers: illegal constant"); | |
2453 } | |
2454 ShouldNotReachHere(); | |
2455 return 0; | |
2456 JVM_END | |
2457 | |
2458 | |
2459 // Misc ////////////////////////////////////////////////////////////////////////////////////////////// | |
2460 | |
2461 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf)) | |
2462 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything | |
2463 JVM_END | |
2464 | |
2465 | |
2466 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2)) | |
2467 JVMWrapper("JVM_IsSameClassPackage"); | |
2468 oop class1_mirror = JNIHandles::resolve_non_null(class1); | |
2469 oop class2_mirror = JNIHandles::resolve_non_null(class2); | |
2470 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror); | |
2471 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror); | |
2472 return (jboolean) Reflection::is_same_class_package(klass1, klass2); | |
2473 JVM_END | |
2474 | |
2475 | |
2476 // IO functions //////////////////////////////////////////////////////////////////////////////////////// | |
2477 | |
2478 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode)) | |
2479 JVMWrapper2("JVM_Open (%s)", fname); | |
2480 | |
2481 //%note jvm_r6 | |
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828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
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1972
diff
changeset
|
2482 int result = os::open(fname, flags, mode); |
0 | 2483 if (result >= 0) { |
2484 return result; | |
2485 } else { | |
2486 switch(errno) { | |
2487 case EEXIST: | |
2488 return JVM_EEXIST; | |
2489 default: | |
2490 return -1; | |
2491 } | |
2492 } | |
2493 JVM_END | |
2494 | |
2495 | |
2496 JVM_LEAF(jint, JVM_Close(jint fd)) | |
2497 JVMWrapper2("JVM_Close (0x%x)", fd); | |
2498 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
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diff
changeset
|
2499 return os::close(fd); |
0 | 2500 JVM_END |
2501 | |
2502 | |
2503 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes)) | |
2504 JVMWrapper2("JVM_Read (0x%x)", fd); | |
2505 | |
2506 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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diff
changeset
|
2507 return (jint)os::restartable_read(fd, buf, nbytes); |
0 | 2508 JVM_END |
2509 | |
2510 | |
2511 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes)) | |
2512 JVMWrapper2("JVM_Write (0x%x)", fd); | |
2513 | |
2514 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
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diff
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|
2515 return (jint)os::write(fd, buf, nbytes); |
0 | 2516 JVM_END |
2517 | |
2518 | |
2519 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes)) | |
2520 JVMWrapper2("JVM_Available (0x%x)", fd); | |
2521 //%note jvm_r6 | |
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6348631: remove the use of the HPI library from Hotspot
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diff
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|
2522 return os::available(fd, pbytes); |
0 | 2523 JVM_END |
2524 | |
2525 | |
2526 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence)) | |
2527 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence); | |
2528 //%note jvm_r6 | |
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diff
changeset
|
2529 return os::lseek(fd, offset, whence); |
0 | 2530 JVM_END |
2531 | |
2532 | |
2533 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length)) | |
2534 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length); | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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diff
changeset
|
2535 return os::ftruncate(fd, length); |
0 | 2536 JVM_END |
2537 | |
2538 | |
2539 JVM_LEAF(jint, JVM_Sync(jint fd)) | |
2540 JVMWrapper2("JVM_Sync (0x%x)", fd); | |
2541 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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diff
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|
2542 return os::fsync(fd); |
0 | 2543 JVM_END |
2544 | |
2545 | |
2546 // Printing support ////////////////////////////////////////////////// | |
2547 extern "C" { | |
2548 | |
2549 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) { | |
2550 // see bug 4399518, 4417214 | |
2551 if ((intptr_t)count <= 0) return -1; | |
2552 return vsnprintf(str, count, fmt, args); | |
2553 } | |
2554 | |
2555 | |
2556 int jio_snprintf(char *str, size_t count, const char *fmt, ...) { | |
2557 va_list args; | |
2558 int len; | |
2559 va_start(args, fmt); | |
2560 len = jio_vsnprintf(str, count, fmt, args); | |
2561 va_end(args); | |
2562 return len; | |
2563 } | |
2564 | |
2565 | |
2566 int jio_fprintf(FILE* f, const char *fmt, ...) { | |
2567 int len; | |
2568 va_list args; | |
2569 va_start(args, fmt); | |
2570 len = jio_vfprintf(f, fmt, args); | |
2571 va_end(args); | |
2572 return len; | |
2573 } | |
2574 | |
2575 | |
2576 int jio_vfprintf(FILE* f, const char *fmt, va_list args) { | |
2577 if (Arguments::vfprintf_hook() != NULL) { | |
2578 return Arguments::vfprintf_hook()(f, fmt, args); | |
2579 } else { | |
2580 return vfprintf(f, fmt, args); | |
2581 } | |
2582 } | |
2583 | |
2584 | |
2191 | 2585 JNIEXPORT int jio_printf(const char *fmt, ...) { |
0 | 2586 int len; |
2587 va_list args; | |
2588 va_start(args, fmt); | |
2589 len = jio_vfprintf(defaultStream::output_stream(), fmt, args); | |
2590 va_end(args); | |
2591 return len; | |
2592 } | |
2593 | |
2594 | |
2595 // HotSpot specific jio method | |
2596 void jio_print(const char* s) { | |
2597 // Try to make this function as atomic as possible. | |
2598 if (Arguments::vfprintf_hook() != NULL) { | |
2599 jio_fprintf(defaultStream::output_stream(), "%s", s); | |
2600 } else { | |
513
2328d1d3f8cf
6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2
xlu
parents:
431
diff
changeset
|
2601 // Make an unused local variable to avoid warning from gcc 4.x compiler. |
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6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2
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diff
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|
2602 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s)); |
0 | 2603 } |
2604 } | |
2605 | |
2606 } // Extern C | |
2607 | |
2608 // java.lang.Thread ////////////////////////////////////////////////////////////////////////////// | |
2609 | |
2610 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock | |
2611 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or | |
2612 // OSThread objects. The exception to this rule is when the target object is the thread | |
2613 // doing the operation, in which case we know that the thread won't exit until the | |
2614 // operation is done (all exits being voluntary). There are a few cases where it is | |
2615 // rather silly to do operations on yourself, like resuming yourself or asking whether | |
2616 // you are alive. While these can still happen, they are not subject to deadlocks if | |
2617 // the lock is held while the operation occurs (this is not the case for suspend, for | |
2618 // instance), and are very unlikely. Because IsAlive needs to be fast and its | |
2619 // implementation is local to this file, we always lock Threads_lock for that one. | |
2620 | |
2621 static void thread_entry(JavaThread* thread, TRAPS) { | |
2622 HandleMark hm(THREAD); | |
2623 Handle obj(THREAD, thread->threadObj()); | |
2624 JavaValue result(T_VOID); | |
2625 JavaCalls::call_virtual(&result, | |
2626 obj, | |
1142 | 2627 KlassHandle(THREAD, SystemDictionary::Thread_klass()), |
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diff
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|
2628 vmSymbols::run_method_name(), |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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diff
changeset
|
2629 vmSymbols::void_method_signature(), |
0 | 2630 THREAD); |
2631 } | |
2632 | |
2633 | |
2634 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread)) | |
2635 JVMWrapper("JVM_StartThread"); | |
2636 JavaThread *native_thread = NULL; | |
2637 | |
2638 // We cannot hold the Threads_lock when we throw an exception, | |
2639 // due to rank ordering issues. Example: we might need to grab the | |
2640 // Heap_lock while we construct the exception. | |
2641 bool throw_illegal_thread_state = false; | |
2642 | |
2643 // We must release the Threads_lock before we can post a jvmti event | |
2644 // in Thread::start. | |
2645 { | |
2646 // Ensure that the C++ Thread and OSThread structures aren't freed before | |
2647 // we operate. | |
2648 MutexLocker mu(Threads_lock); | |
2649 | |
2162
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
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diff
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|
2650 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2651 // re-starting an already started thread, so we should usually find |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2652 // that the JavaThread is null. However for a JNI attached thread |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
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1980
diff
changeset
|
2653 // there is a small window between the Thread object being created |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
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1980
diff
changeset
|
2654 // (with its JavaThread set) and the update to its threadStatus, so we |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2655 // have to check for this |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
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diff
changeset
|
2656 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) { |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
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diff
changeset
|
2657 throw_illegal_thread_state = true; |
0 | 2658 } else { |
2162
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
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diff
changeset
|
2659 // We could also check the stillborn flag to see if this thread was already stopped, but |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2660 // for historical reasons we let the thread detect that itself when it starts running |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
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diff
changeset
|
2661 |
0 | 2662 jlong size = |
2663 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread)); | |
2664 // Allocate the C++ Thread structure and create the native thread. The | |
2665 // stack size retrieved from java is signed, but the constructor takes | |
2666 // size_t (an unsigned type), so avoid passing negative values which would | |
2667 // result in really large stacks. | |
2668 size_t sz = size > 0 ? (size_t) size : 0; | |
2669 native_thread = new JavaThread(&thread_entry, sz); | |
2670 | |
2671 // At this point it may be possible that no osthread was created for the | |
2672 // JavaThread due to lack of memory. Check for this situation and throw | |
2673 // an exception if necessary. Eventually we may want to change this so | |
2674 // that we only grab the lock if the thread was created successfully - | |
2675 // then we can also do this check and throw the exception in the | |
2676 // JavaThread constructor. | |
2677 if (native_thread->osthread() != NULL) { | |
2678 // Note: the current thread is not being used within "prepare". | |
2679 native_thread->prepare(jthread); | |
2680 } | |
2681 } | |
2682 } | |
2683 | |
2684 if (throw_illegal_thread_state) { | |
2685 THROW(vmSymbols::java_lang_IllegalThreadStateException()); | |
2686 } | |
2687 | |
2688 assert(native_thread != NULL, "Starting null thread?"); | |
2689 | |
2690 if (native_thread->osthread() == NULL) { | |
2691 // No one should hold a reference to the 'native_thread'. | |
2692 delete native_thread; | |
2693 if (JvmtiExport::should_post_resource_exhausted()) { | |
2694 JvmtiExport::post_resource_exhausted( | |
2695 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS, | |
2696 "unable to create new native thread"); | |
2697 } | |
2698 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), | |
2699 "unable to create new native thread"); | |
2700 } | |
2701 | |
2702 Thread::start(native_thread); | |
2703 | |
2704 JVM_END | |
2705 | |
2706 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints | |
2707 // before the quasi-asynchronous exception is delivered. This is a little obtrusive, | |
2708 // but is thought to be reliable and simple. In the case, where the receiver is the | |
2162
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2709 // same thread as the sender, no safepoint is needed. |
0 | 2710 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable)) |
2711 JVMWrapper("JVM_StopThread"); | |
2712 | |
2713 oop java_throwable = JNIHandles::resolve(throwable); | |
2714 if (java_throwable == NULL) { | |
2715 THROW(vmSymbols::java_lang_NullPointerException()); | |
2716 } | |
2717 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2718 JavaThread* receiver = java_lang_Thread::thread(java_thread); | |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4717
diff
changeset
|
2719 Events::log_exception(JavaThread::current(), |
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4717
diff
changeset
|
2720 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", |
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4717
diff
changeset
|
2721 receiver, (address)java_thread, throwable); |
2162
ccfcb502af3f
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diff
changeset
|
2722 // First check if thread is alive |
0 | 2723 if (receiver != NULL) { |
2724 // Check if exception is getting thrown at self (use oop equality, since the | |
2725 // target object might exit) | |
2726 if (java_thread == thread->threadObj()) { | |
2727 THROW_OOP(java_throwable); | |
2728 } else { | |
2729 // Enques a VM_Operation to stop all threads and then deliver the exception... | |
2730 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable)); | |
2731 } | |
2732 } | |
2162
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diff
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|
2733 else { |
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diff
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|
2734 // Either: |
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diff
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|
2735 // - target thread has not been started before being stopped, or |
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1980
diff
changeset
|
2736 // - target thread already terminated |
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diff
changeset
|
2737 // We could read the threadStatus to determine which case it is |
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parents:
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diff
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|
2738 // but that is overkill as it doesn't matter. We must set the |
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parents:
1980
diff
changeset
|
2739 // stillborn flag for the first case, and if the thread has already |
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parents:
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diff
changeset
|
2740 // exited setting this flag has no affect |
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diff
changeset
|
2741 java_lang_Thread::set_stillborn(java_thread); |
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diff
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|
2742 } |
0 | 2743 JVM_END |
2744 | |
2745 | |
2746 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread)) | |
2747 JVMWrapper("JVM_IsThreadAlive"); | |
2748 | |
2749 oop thread_oop = JNIHandles::resolve_non_null(jthread); | |
2750 return java_lang_Thread::is_alive(thread_oop); | |
2751 JVM_END | |
2752 | |
2753 | |
2754 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread)) | |
2755 JVMWrapper("JVM_SuspendThread"); | |
2756 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2757 JavaThread* receiver = java_lang_Thread::thread(java_thread); | |
2758 | |
2759 if (receiver != NULL) { | |
2760 // thread has run and has not exited (still on threads list) | |
2761 | |
2762 { | |
2763 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag); | |
2764 if (receiver->is_external_suspend()) { | |
2765 // Don't allow nested external suspend requests. We can't return | |
2766 // an error from this interface so just ignore the problem. | |
2767 return; | |
2768 } | |
2769 if (receiver->is_exiting()) { // thread is in the process of exiting | |
2770 return; | |
2771 } | |
2772 receiver->set_external_suspend(); | |
2773 } | |
2774 | |
2775 // java_suspend() will catch threads in the process of exiting | |
2776 // and will ignore them. | |
2777 receiver->java_suspend(); | |
2778 | |
2779 // It would be nice to have the following assertion in all the | |
2780 // time, but it is possible for a racing resume request to have | |
2781 // resumed this thread right after we suspended it. Temporarily | |
2782 // enable this assertion if you are chasing a different kind of | |
2783 // bug. | |
2784 // | |
2785 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL || | |
2786 // receiver->is_being_ext_suspended(), "thread is not suspended"); | |
2787 } | |
2788 JVM_END | |
2789 | |
2790 | |
2791 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread)) | |
2792 JVMWrapper("JVM_ResumeThread"); | |
2793 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate. | |
2794 // We need to *always* get the threads lock here, since this operation cannot be allowed during | |
2795 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other | |
2796 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code | |
2797 // looks at it. | |
2798 MutexLocker ml(Threads_lock); | |
2799 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
2800 if (thr != NULL) { | |
2801 // the thread has run and is not in the process of exiting | |
2802 thr->java_resume(); | |
2803 } | |
2804 JVM_END | |
2805 | |
2806 | |
2807 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio)) | |
2808 JVMWrapper("JVM_SetThreadPriority"); | |
2809 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
2810 MutexLocker ml(Threads_lock); | |
2811 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2812 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio); | |
2813 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
2814 if (thr != NULL) { // Thread not yet started; priority pushed down when it is | |
2815 Thread::set_priority(thr, (ThreadPriority)prio); | |
2816 } | |
2817 JVM_END | |
2818 | |
2819 | |
2820 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass)) | |
2821 JVMWrapper("JVM_Yield"); | |
2822 if (os::dont_yield()) return; | |
4006 | 2823 #ifndef USDT2 |
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|
2824 HS_DTRACE_PROBE0(hotspot, thread__yield); |
4006 | 2825 #else /* USDT2 */ |
2826 HOTSPOT_THREAD_YIELD(); | |
2827 #endif /* USDT2 */ | |
0 | 2828 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield. |
2829 // Critical for similar threading behaviour | |
2830 if (ConvertYieldToSleep) { | |
2831 os::sleep(thread, MinSleepInterval, false); | |
2832 } else { | |
2833 os::yield(); | |
2834 } | |
2835 JVM_END | |
2836 | |
2837 | |
2838 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis)) | |
2839 JVMWrapper("JVM_Sleep"); | |
2840 | |
2841 if (millis < 0) { | |
2842 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative"); | |
2843 } | |
2844 | |
2845 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) { | |
2846 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); | |
2847 } | |
2848 | |
2849 // Save current thread state and restore it at the end of this block. | |
2850 // And set new thread state to SLEEPING. | |
2851 JavaThreadSleepState jtss(thread); | |
2852 | |
4006 | 2853 #ifndef USDT2 |
1324
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1144
diff
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|
2854 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis); |
4006 | 2855 #else /* USDT2 */ |
2856 HOTSPOT_THREAD_SLEEP_BEGIN( | |
2857 millis); | |
2858 #endif /* USDT2 */ | |
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1144
diff
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|
2859 |
0 | 2860 if (millis == 0) { |
2861 // When ConvertSleepToYield is on, this matches the classic VM implementation of | |
2862 // JVM_Sleep. Critical for similar threading behaviour (Win32) | |
2863 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep | |
2864 // for SOLARIS | |
2865 if (ConvertSleepToYield) { | |
2866 os::yield(); | |
2867 } else { | |
2868 ThreadState old_state = thread->osthread()->get_state(); | |
2869 thread->osthread()->set_state(SLEEPING); | |
2870 os::sleep(thread, MinSleepInterval, false); | |
2871 thread->osthread()->set_state(old_state); | |
2872 } | |
2873 } else { | |
2874 ThreadState old_state = thread->osthread()->get_state(); | |
2875 thread->osthread()->set_state(SLEEPING); | |
2876 if (os::sleep(thread, millis, true) == OS_INTRPT) { | |
2877 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on | |
2878 // us while we were sleeping. We do not overwrite those. | |
2879 if (!HAS_PENDING_EXCEPTION) { | |
4006 | 2880 #ifndef USDT2 |
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diff
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|
2881 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1); |
4006 | 2882 #else /* USDT2 */ |
2883 HOTSPOT_THREAD_SLEEP_END( | |
2884 1); | |
2885 #endif /* USDT2 */ | |
0 | 2886 // TODO-FIXME: THROW_MSG returns which means we will not call set_state() |
2887 // to properly restore the thread state. That's likely wrong. | |
2888 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); | |
2889 } | |
2890 } | |
2891 thread->osthread()->set_state(old_state); | |
2892 } | |
4006 | 2893 #ifndef USDT2 |
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|
2894 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0); |
4006 | 2895 #else /* USDT2 */ |
2896 HOTSPOT_THREAD_SLEEP_END( | |
2897 0); | |
2898 #endif /* USDT2 */ | |
0 | 2899 JVM_END |
2900 | |
2901 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) | |
2902 JVMWrapper("JVM_CurrentThread"); | |
2903 oop jthread = thread->threadObj(); | |
2904 assert (thread != NULL, "no current thread!"); | |
2905 return JNIHandles::make_local(env, jthread); | |
2906 JVM_END | |
2907 | |
2908 | |
2909 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread)) | |
2910 JVMWrapper("JVM_CountStackFrames"); | |
2911 | |
2912 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
2913 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2914 bool throw_illegal_thread_state = false; | |
2915 int count = 0; | |
2916 | |
2917 { | |
2918 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); | |
2919 // We need to re-resolve the java_thread, since a GC might have happened during the | |
2920 // acquire of the lock | |
2921 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
2922 | |
2923 if (thr == NULL) { | |
2924 // do nothing | |
2925 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) { | |
2926 // Check whether this java thread has been suspended already. If not, throws | |
2927 // IllegalThreadStateException. We defer to throw that exception until | |
2928 // Threads_lock is released since loading exception class has to leave VM. | |
2929 // The correct way to test a thread is actually suspended is | |
2930 // wait_for_ext_suspend_completion(), but we can't call that while holding | |
2931 // the Threads_lock. The above tests are sufficient for our purposes | |
2932 // provided the walkability of the stack is stable - which it isn't | |
2933 // 100% but close enough for most practical purposes. | |
2934 throw_illegal_thread_state = true; | |
2935 } else { | |
2936 // Count all java activation, i.e., number of vframes | |
2937 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) { | |
2938 // Native frames are not counted | |
2939 if (!vfst.method()->is_native()) count++; | |
2940 } | |
2941 } | |
2942 } | |
2943 | |
2944 if (throw_illegal_thread_state) { | |
2945 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(), | |
2946 "this thread is not suspended"); | |
2947 } | |
2948 return count; | |
2949 JVM_END | |
2950 | |
2951 // Consider: A better way to implement JVM_Interrupt() is to acquire | |
2952 // Threads_lock to resolve the jthread into a Thread pointer, fetch | |
2953 // Thread->platformevent, Thread->native_thr, Thread->parker, etc., | |
2954 // drop Threads_lock, and the perform the unpark() and thr_kill() operations | |
2955 // outside the critical section. Threads_lock is hot so we want to minimize | |
2956 // the hold-time. A cleaner interface would be to decompose interrupt into | |
2957 // two steps. The 1st phase, performed under Threads_lock, would return | |
2958 // a closure that'd be invoked after Threads_lock was dropped. | |
2959 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and | |
2960 // admit spurious wakeups. | |
2961 | |
2962 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread)) | |
2963 JVMWrapper("JVM_Interrupt"); | |
2964 | |
2965 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
2966 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2967 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); | |
2968 // We need to re-resolve the java_thread, since a GC might have happened during the | |
2969 // acquire of the lock | |
2970 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
2971 if (thr != NULL) { | |
2972 Thread::interrupt(thr); | |
2973 } | |
2974 JVM_END | |
2975 | |
2976 | |
2977 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted)) | |
2978 JVMWrapper("JVM_IsInterrupted"); | |
2979 | |
2980 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
2981 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2982 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); | |
2983 // We need to re-resolve the java_thread, since a GC might have happened during the | |
2984 // acquire of the lock | |
2985 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
2986 if (thr == NULL) { | |
2987 return JNI_FALSE; | |
2988 } else { | |
2989 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0); | |
2990 } | |
2991 JVM_END | |
2992 | |
2993 | |
2994 // Return true iff the current thread has locked the object passed in | |
2995 | |
2996 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj)) | |
2997 JVMWrapper("JVM_HoldsLock"); | |
2998 assert(THREAD->is_Java_thread(), "sanity check"); | |
2999 if (obj == NULL) { | |
3000 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
3001 } | |
3002 Handle h_obj(THREAD, JNIHandles::resolve(obj)); | |
3003 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj); | |
3004 JVM_END | |
3005 | |
3006 | |
3007 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass)) | |
3008 JVMWrapper("JVM_DumpAllStacks"); | |
3009 VM_PrintThreads op; | |
3010 VMThread::execute(&op); | |
3011 if (JvmtiExport::should_post_data_dump()) { | |
3012 JvmtiExport::post_data_dump(); | |
3013 } | |
3014 JVM_END | |
3015 | |
4006 | 3016 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name)) |
3017 JVMWrapper("JVM_SetNativeThreadName"); | |
3018 ResourceMark rm(THREAD); | |
3019 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
3020 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
3021 // Thread naming only supported for the current thread, doesn't work for | |
3022 // target threads. | |
3023 if (Thread::current() == thr && !thr->has_attached_via_jni()) { | |
3024 // we don't set the name of an attached thread to avoid stepping | |
3025 // on other programs | |
3026 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); | |
3027 os::set_native_thread_name(thread_name); | |
3028 } | |
3029 JVM_END | |
0 | 3030 |
3031 // java.lang.SecurityManager /////////////////////////////////////////////////////////////////////// | |
3032 | |
3033 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) { | |
3034 assert(jthread->is_Java_thread(), "must be a Java thread"); | |
3035 if (jthread->privileged_stack_top() == NULL) return false; | |
3036 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) { | |
3037 oop loader = jthread->privileged_stack_top()->class_loader(); | |
3038 if (loader == NULL) return true; | |
3039 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); | |
3040 if (trusted) return true; | |
3041 } | |
3042 return false; | |
3043 } | |
3044 | |
3045 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env)) | |
3046 JVMWrapper("JVM_CurrentLoadedClass"); | |
3047 ResourceMark rm(THREAD); | |
3048 | |
3049 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3050 // if a method in a class in a trusted loader is in a doPrivileged, return NULL | |
3051 bool trusted = is_trusted_frame(thread, &vfst); | |
3052 if (trusted) return NULL; | |
3053 | |
3054 methodOop m = vfst.method(); | |
3055 if (!m->is_native()) { | |
3056 klassOop holder = m->method_holder(); | |
3057 oop loader = instanceKlass::cast(holder)->class_loader(); | |
3058 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { | |
3059 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror()); | |
3060 } | |
3061 } | |
3062 } | |
3063 return NULL; | |
3064 JVM_END | |
3065 | |
3066 | |
3067 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env)) | |
3068 JVMWrapper("JVM_CurrentClassLoader"); | |
3069 ResourceMark rm(THREAD); | |
3070 | |
3071 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3072 | |
3073 // if a method in a class in a trusted loader is in a doPrivileged, return NULL | |
3074 bool trusted = is_trusted_frame(thread, &vfst); | |
3075 if (trusted) return NULL; | |
3076 | |
3077 methodOop m = vfst.method(); | |
3078 if (!m->is_native()) { | |
3079 klassOop holder = m->method_holder(); | |
3080 assert(holder->is_klass(), "just checking"); | |
3081 oop loader = instanceKlass::cast(holder)->class_loader(); | |
3082 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { | |
3083 return JNIHandles::make_local(env, loader); | |
3084 } | |
3085 } | |
3086 } | |
3087 return NULL; | |
3088 JVM_END | |
3089 | |
3090 | |
3091 // Utility object for collecting method holders walking down the stack | |
3092 class KlassLink: public ResourceObj { | |
3093 public: | |
3094 KlassHandle klass; | |
3095 KlassLink* next; | |
3096 | |
3097 KlassLink(KlassHandle k) { klass = k; next = NULL; } | |
3098 }; | |
3099 | |
3100 | |
3101 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env)) | |
3102 JVMWrapper("JVM_GetClassContext"); | |
3103 ResourceMark rm(THREAD); | |
3104 JvmtiVMObjectAllocEventCollector oam; | |
3105 // Collect linked list of (handles to) method holders | |
3106 KlassLink* first = NULL; | |
3107 KlassLink* last = NULL; | |
3108 int depth = 0; | |
3109 | |
3110 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) { | |
3111 // Native frames are not returned | |
3112 if (!vfst.method()->is_native()) { | |
3113 klassOop holder = vfst.method()->method_holder(); | |
3114 assert(holder->is_klass(), "just checking"); | |
3115 depth++; | |
3116 KlassLink* l = new KlassLink(KlassHandle(thread, holder)); | |
3117 if (first == NULL) { | |
3118 first = last = l; | |
3119 } else { | |
3120 last->next = l; | |
3121 last = l; | |
3122 } | |
3123 } | |
3124 } | |
3125 | |
3126 // Create result array of type [Ljava/lang/Class; | |
1142 | 3127 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL); |
0 | 3128 // Fill in mirrors corresponding to method holders |
3129 int index = 0; | |
3130 while (first != NULL) { | |
3131 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror()); | |
3132 first = first->next; | |
3133 } | |
3134 assert(index == depth, "just checking"); | |
3135 | |
3136 return (jobjectArray) JNIHandles::make_local(env, result); | |
3137 JVM_END | |
3138 | |
3139 | |
3140 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name)) | |
3141 JVMWrapper("JVM_ClassDepth"); | |
3142 ResourceMark rm(THREAD); | |
3143 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); | |
3144 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0); | |
3145 | |
3146 const char* str = java_lang_String::as_utf8_string(class_name_str()); | |
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2162
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|
3147 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str)); |
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diff
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|
3148 if (class_name_sym == NULL) { |
0 | 3149 return -1; |
3150 } | |
3151 | |
3152 int depth = 0; | |
3153 | |
3154 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3155 if (!vfst.method()->is_native()) { | |
3156 klassOop holder = vfst.method()->method_holder(); | |
3157 assert(holder->is_klass(), "just checking"); | |
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|
3158 if (instanceKlass::cast(holder)->name() == class_name_sym) { |
0 | 3159 return depth; |
3160 } | |
3161 depth++; | |
3162 } | |
3163 } | |
3164 return -1; | |
3165 JVM_END | |
3166 | |
3167 | |
3168 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env)) | |
3169 JVMWrapper("JVM_ClassLoaderDepth"); | |
3170 ResourceMark rm(THREAD); | |
3171 int depth = 0; | |
3172 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3173 // if a method in a class in a trusted loader is in a doPrivileged, return -1 | |
3174 bool trusted = is_trusted_frame(thread, &vfst); | |
3175 if (trusted) return -1; | |
3176 | |
3177 methodOop m = vfst.method(); | |
3178 if (!m->is_native()) { | |
3179 klassOop holder = m->method_holder(); | |
3180 assert(holder->is_klass(), "just checking"); | |
3181 oop loader = instanceKlass::cast(holder)->class_loader(); | |
3182 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { | |
3183 return depth; | |
3184 } | |
3185 depth++; | |
3186 } | |
3187 } | |
3188 return -1; | |
3189 JVM_END | |
3190 | |
3191 | |
3192 // java.lang.Package //////////////////////////////////////////////////////////////// | |
3193 | |
3194 | |
3195 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name)) | |
3196 JVMWrapper("JVM_GetSystemPackage"); | |
3197 ResourceMark rm(THREAD); | |
3198 JvmtiVMObjectAllocEventCollector oam; | |
3199 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); | |
3200 oop result = ClassLoader::get_system_package(str, CHECK_NULL); | |
3201 return (jstring) JNIHandles::make_local(result); | |
3202 JVM_END | |
3203 | |
3204 | |
3205 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env)) | |
3206 JVMWrapper("JVM_GetSystemPackages"); | |
3207 JvmtiVMObjectAllocEventCollector oam; | |
3208 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL); | |
3209 return (jobjectArray) JNIHandles::make_local(result); | |
3210 JVM_END | |
3211 | |
3212 | |
3213 // ObjectInputStream /////////////////////////////////////////////////////////////// | |
3214 | |
3215 bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) { | |
3216 if (current_class == NULL) { | |
3217 return true; | |
3218 } | |
3219 if ((current_class == field_class) || access.is_public()) { | |
3220 return true; | |
3221 } | |
3222 | |
3223 if (access.is_protected()) { | |
3224 // See if current_class is a subclass of field_class | |
3225 if (Klass::cast(current_class)->is_subclass_of(field_class)) { | |
3226 return true; | |
3227 } | |
3228 } | |
3229 | |
3230 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class)); | |
3231 } | |
3232 | |
3233 | |
3234 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4 | |
3235 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass)) | |
3236 JVMWrapper("JVM_AllocateNewObject"); | |
3237 JvmtiVMObjectAllocEventCollector oam; | |
3238 // Receiver is not used | |
3239 oop curr_mirror = JNIHandles::resolve_non_null(currClass); | |
3240 oop init_mirror = JNIHandles::resolve_non_null(initClass); | |
3241 | |
3242 // Cannot instantiate primitive types | |
3243 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) { | |
3244 ResourceMark rm(THREAD); | |
3245 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3246 } | |
3247 | |
3248 // Arrays not allowed here, must use JVM_AllocateNewArray | |
3249 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() || | |
3250 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) { | |
3251 ResourceMark rm(THREAD); | |
3252 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3253 } | |
3254 | |
3255 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror)); | |
3256 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror)); | |
3257 | |
3258 assert(curr_klass->is_subclass_of(init_klass()), "just checking"); | |
3259 | |
3260 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly. | |
3261 curr_klass->check_valid_for_instantiation(false, CHECK_NULL); | |
3262 | |
3263 // Make sure klass is initialized, since we are about to instantiate one of them. | |
3264 curr_klass->initialize(CHECK_NULL); | |
3265 | |
3266 methodHandle m (THREAD, | |
3267 init_klass->find_method(vmSymbols::object_initializer_name(), | |
3268 vmSymbols::void_method_signature())); | |
3269 if (m.is_null()) { | |
3270 ResourceMark rm(THREAD); | |
3271 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), | |
3272 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()), | |
3273 vmSymbols::object_initializer_name(), | |
3274 vmSymbols::void_method_signature())); | |
3275 } | |
3276 | |
3277 if (curr_klass == init_klass && !m->is_public()) { | |
3278 // Calling the constructor for class 'curr_klass'. | |
3279 // Only allow calls to a public no-arg constructor. | |
3280 // This path corresponds to creating an Externalizable object. | |
3281 THROW_0(vmSymbols::java_lang_IllegalAccessException()); | |
3282 } | |
3283 | |
3284 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) { | |
3285 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb' | |
3286 THROW_0(vmSymbols::java_lang_IllegalAccessException()); | |
3287 } | |
3288 | |
3289 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL); | |
3290 // Call constructor m. This might call a constructor higher up in the hierachy | |
3291 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL); | |
3292 | |
3293 return JNIHandles::make_local(obj()); | |
3294 JVM_END | |
3295 | |
3296 | |
3297 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length)) | |
3298 JVMWrapper("JVM_AllocateNewArray"); | |
3299 JvmtiVMObjectAllocEventCollector oam; | |
3300 oop mirror = JNIHandles::resolve_non_null(currClass); | |
3301 | |
3302 if (java_lang_Class::is_primitive(mirror)) { | |
3303 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3304 } | |
3305 klassOop k = java_lang_Class::as_klassOop(mirror); | |
3306 oop result; | |
3307 | |
3308 if (k->klass_part()->oop_is_typeArray()) { | |
3309 // typeArray | |
3310 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL); | |
3311 } else if (k->klass_part()->oop_is_objArray()) { | |
3312 // objArray | |
3313 objArrayKlassHandle oak(THREAD, k); | |
3314 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior) | |
3315 result = oak->allocate(length, CHECK_NULL); | |
3316 } else { | |
3317 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3318 } | |
3319 return JNIHandles::make_local(env, result); | |
3320 JVM_END | |
3321 | |
3322 | |
3323 // Return the first non-null class loader up the execution stack, or null | |
3324 // if only code from the null class loader is on the stack. | |
3325 | |
3326 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env)) | |
3327 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3328 // UseNewReflection | |
3329 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection | |
3330 klassOop holder = vfst.method()->method_holder(); | |
3331 oop loader = instanceKlass::cast(holder)->class_loader(); | |
3332 if (loader != NULL) { | |
3333 return JNIHandles::make_local(env, loader); | |
3334 } | |
3335 } | |
3336 return NULL; | |
3337 JVM_END | |
3338 | |
3339 | |
3340 // Load a class relative to the most recent class on the stack with a non-null | |
3341 // classloader. | |
3342 // This function has been deprecated and should not be considered part of the | |
3343 // specified JVM interface. | |
3344 | |
3345 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver, | |
3346 jclass currClass, jstring currClassName)) | |
3347 JVMWrapper("JVM_LoadClass0"); | |
3348 // Receiver is not used | |
3349 ResourceMark rm(THREAD); | |
3350 | |
3351 // Class name argument is not guaranteed to be in internal format | |
3352 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName)); | |
3353 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL); | |
3354 | |
3355 const char* str = java_lang_String::as_utf8_string(string()); | |
3356 | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3357 if (str == NULL || (int)strlen(str) > Symbol::max_length()) { |
0 | 3358 // It's impossible to create this class; the name cannot fit |
3359 // into the constant pool. | |
3360 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str); | |
3361 } | |
3362 | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3363 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL); |
0 | 3364 Handle curr_klass (THREAD, JNIHandles::resolve(currClass)); |
3365 // Find the most recent class on the stack with a non-null classloader | |
3366 oop loader = NULL; | |
3367 oop protection_domain = NULL; | |
3368 if (curr_klass.is_null()) { | |
3369 for (vframeStream vfst(thread); | |
3370 !vfst.at_end() && loader == NULL; | |
3371 vfst.next()) { | |
3372 if (!vfst.method()->is_native()) { | |
3373 klassOop holder = vfst.method()->method_holder(); | |
3374 loader = instanceKlass::cast(holder)->class_loader(); | |
3375 protection_domain = instanceKlass::cast(holder)->protection_domain(); | |
3376 } | |
3377 } | |
3378 } else { | |
3379 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass()); | |
3380 loader = instanceKlass::cast(curr_klass_oop)->class_loader(); | |
3381 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain(); | |
3382 } | |
3383 Handle h_loader(THREAD, loader); | |
3384 Handle h_prot (THREAD, protection_domain); | |
657
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
3385 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot, |
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
3386 false, thread); |
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
3387 if (TraceClassResolution && result != NULL) { |
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
3388 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); |
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
3389 } |
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
3390 return result; |
0 | 3391 JVM_END |
3392 | |
3393 | |
3394 // Array /////////////////////////////////////////////////////////////////////////////////////////// | |
3395 | |
3396 | |
3397 // resolve array handle and check arguments | |
3398 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) { | |
3399 if (arr == NULL) { | |
3400 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
3401 } | |
3402 oop a = JNIHandles::resolve_non_null(arr); | |
3403 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) { | |
3404 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array"); | |
3405 } | |
3406 return arrayOop(a); | |
3407 } | |
3408 | |
3409 | |
3410 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr)) | |
3411 JVMWrapper("JVM_GetArrayLength"); | |
3412 arrayOop a = check_array(env, arr, false, CHECK_0); | |
3413 return a->length(); | |
3414 JVM_END | |
3415 | |
3416 | |
3417 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index)) | |
3418 JVMWrapper("JVM_Array_Get"); | |
3419 JvmtiVMObjectAllocEventCollector oam; | |
3420 arrayOop a = check_array(env, arr, false, CHECK_NULL); | |
3421 jvalue value; | |
3422 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL); | |
3423 oop box = Reflection::box(&value, type, CHECK_NULL); | |
3424 return JNIHandles::make_local(env, box); | |
3425 JVM_END | |
3426 | |
3427 | |
3428 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode)) | |
3429 JVMWrapper("JVM_GetPrimitiveArrayElement"); | |
3430 jvalue value; | |
3431 value.i = 0; // to initialize value before getting used in CHECK | |
3432 arrayOop a = check_array(env, arr, true, CHECK_(value)); | |
3433 assert(a->is_typeArray(), "just checking"); | |
3434 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value)); | |
3435 BasicType wide_type = (BasicType) wCode; | |
3436 if (type != wide_type) { | |
3437 Reflection::widen(&value, type, wide_type, CHECK_(value)); | |
3438 } | |
3439 return value; | |
3440 JVM_END | |
3441 | |
3442 | |
3443 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val)) | |
3444 JVMWrapper("JVM_SetArrayElement"); | |
3445 arrayOop a = check_array(env, arr, false, CHECK); | |
3446 oop box = JNIHandles::resolve(val); | |
3447 jvalue value; | |
3448 value.i = 0; // to initialize value before getting used in CHECK | |
3449 BasicType value_type; | |
3450 if (a->is_objArray()) { | |
3451 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array | |
3452 value_type = Reflection::unbox_for_regular_object(box, &value); | |
3453 } else { | |
3454 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); | |
3455 } | |
3456 Reflection::array_set(&value, a, index, value_type, CHECK); | |
3457 JVM_END | |
3458 | |
3459 | |
3460 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode)) | |
3461 JVMWrapper("JVM_SetPrimitiveArrayElement"); | |
3462 arrayOop a = check_array(env, arr, true, CHECK); | |
3463 assert(a->is_typeArray(), "just checking"); | |
3464 BasicType value_type = (BasicType) vCode; | |
3465 Reflection::array_set(&v, a, index, value_type, CHECK); | |
3466 JVM_END | |
3467 | |
3468 | |
3469 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length)) | |
3470 JVMWrapper("JVM_NewArray"); | |
3471 JvmtiVMObjectAllocEventCollector oam; | |
3472 oop element_mirror = JNIHandles::resolve(eltClass); | |
3473 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL); | |
3474 return JNIHandles::make_local(env, result); | |
3475 JVM_END | |
3476 | |
3477 | |
3478 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim)) | |
3479 JVMWrapper("JVM_NewMultiArray"); | |
3480 JvmtiVMObjectAllocEventCollector oam; | |
3481 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL); | |
3482 oop element_mirror = JNIHandles::resolve(eltClass); | |
3483 assert(dim_array->is_typeArray(), "just checking"); | |
3484 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL); | |
3485 return JNIHandles::make_local(env, result); | |
3486 JVM_END | |
3487 | |
3488 | |
3489 // Networking library support //////////////////////////////////////////////////////////////////// | |
3490 | |
3491 JVM_LEAF(jint, JVM_InitializeSocketLibrary()) | |
3492 JVMWrapper("JVM_InitializeSocketLibrary"); | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3493 return 0; |
0 | 3494 JVM_END |
3495 | |
3496 | |
3497 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol)) | |
3498 JVMWrapper("JVM_Socket"); | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3499 return os::socket(domain, type, protocol); |
0 | 3500 JVM_END |
3501 | |
3502 | |
3503 JVM_LEAF(jint, JVM_SocketClose(jint fd)) | |
3504 JVMWrapper2("JVM_SocketClose (0x%x)", fd); | |
3505 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3506 return os::socket_close(fd); |
0 | 3507 JVM_END |
3508 | |
3509 | |
3510 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto)) | |
3511 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd); | |
3512 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3513 return os::socket_shutdown(fd, howto); |
0 | 3514 JVM_END |
3515 | |
3516 | |
3517 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags)) | |
3518 JVMWrapper2("JVM_Recv (0x%x)", fd); | |
3519 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3520 return os::recv(fd, buf, (size_t)nBytes, (uint)flags); |
0 | 3521 JVM_END |
3522 | |
3523 | |
3524 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags)) | |
3525 JVMWrapper2("JVM_Send (0x%x)", fd); | |
3526 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3527 return os::send(fd, buf, (size_t)nBytes, (uint)flags); |
0 | 3528 JVM_END |
3529 | |
3530 | |
3531 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout)) | |
3532 JVMWrapper2("JVM_Timeout (0x%x)", fd); | |
3533 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3534 return os::timeout(fd, timeout); |
0 | 3535 JVM_END |
3536 | |
3537 | |
3538 JVM_LEAF(jint, JVM_Listen(jint fd, jint count)) | |
3539 JVMWrapper2("JVM_Listen (0x%x)", fd); | |
3540 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3541 return os::listen(fd, count); |
0 | 3542 JVM_END |
3543 | |
3544 | |
3545 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len)) | |
3546 JVMWrapper2("JVM_Connect (0x%x)", fd); | |
3547 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3548 return os::connect(fd, him, (socklen_t)len); |
0 | 3549 JVM_END |
3550 | |
3551 | |
3552 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len)) | |
3553 JVMWrapper2("JVM_Bind (0x%x)", fd); | |
3554 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3555 return os::bind(fd, him, (socklen_t)len); |
0 | 3556 JVM_END |
3557 | |
3558 | |
3559 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len)) | |
3560 JVMWrapper2("JVM_Accept (0x%x)", fd); | |
3561 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3562 socklen_t socklen = (socklen_t)(*len); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3563 jint result = os::accept(fd, him, &socklen); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3564 *len = (jint)socklen; |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3565 return result; |
0 | 3566 JVM_END |
3567 | |
3568 | |
3569 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen)) | |
3570 JVMWrapper2("JVM_RecvFrom (0x%x)", fd); | |
3571 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3572 socklen_t socklen = (socklen_t)(*fromlen); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3573 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3574 *fromlen = (int)socklen; |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3575 return result; |
0 | 3576 JVM_END |
3577 | |
3578 | |
3579 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len)) | |
3580 JVMWrapper2("JVM_GetSockName (0x%x)", fd); | |
3581 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3582 socklen_t socklen = (socklen_t)(*len); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3583 jint result = os::get_sock_name(fd, him, &socklen); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3584 *len = (int)socklen; |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3585 return result; |
0 | 3586 JVM_END |
3587 | |
3588 | |
3589 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen)) | |
3590 JVMWrapper2("JVM_SendTo (0x%x)", fd); | |
3591 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3592 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen); |
0 | 3593 JVM_END |
3594 | |
3595 | |
3596 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes)) | |
3597 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd); | |
3598 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3599 return os::socket_available(fd, pbytes); |
0 | 3600 JVM_END |
3601 | |
3602 | |
3603 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen)) | |
3604 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); | |
3605 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3606 socklen_t socklen = (socklen_t)(*optlen); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3607 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3608 *optlen = (int)socklen; |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3609 return result; |
0 | 3610 JVM_END |
3611 | |
3612 | |
3613 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen)) | |
3614 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); | |
3615 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3616 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen); |
0 | 3617 JVM_END |
3618 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3619 |
0 | 3620 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen)) |
3621 JVMWrapper("JVM_GetHostName"); | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3622 return os::get_host_name(name, namelen); |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3623 JVM_END |
0 | 3624 |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3625 |
0 | 3626 // Library support /////////////////////////////////////////////////////////////////////////// |
3627 | |
3628 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name)) | |
3629 //%note jvm_ct | |
3630 JVMWrapper2("JVM_LoadLibrary (%s)", name); | |
3631 char ebuf[1024]; | |
3632 void *load_result; | |
3633 { | |
3634 ThreadToNativeFromVM ttnfvm(thread); | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3635 load_result = os::dll_load(name, ebuf, sizeof ebuf); |
0 | 3636 } |
3637 if (load_result == NULL) { | |
3638 char msg[1024]; | |
3639 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf); | |
3640 // Since 'ebuf' may contain a string encoded using | |
3641 // platform encoding scheme, we need to pass | |
3642 // Exceptions::unsafe_to_utf8 to the new_exception method | |
3643 // as the last argument. See bug 6367357. | |
3644 Handle h_exception = | |
3645 Exceptions::new_exception(thread, | |
3646 vmSymbols::java_lang_UnsatisfiedLinkError(), | |
3647 msg, Exceptions::unsafe_to_utf8); | |
3648 | |
3649 THROW_HANDLE_0(h_exception); | |
3650 } | |
3651 return load_result; | |
3652 JVM_END | |
3653 | |
3654 | |
3655 JVM_LEAF(void, JVM_UnloadLibrary(void* handle)) | |
3656 JVMWrapper("JVM_UnloadLibrary"); | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3657 os::dll_unload(handle); |
0 | 3658 JVM_END |
3659 | |
3660 | |
3661 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name)) | |
3662 JVMWrapper2("JVM_FindLibraryEntry (%s)", name); | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3663 return os::dll_lookup(handle, name); |
0 | 3664 JVM_END |
3665 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3666 |
0 | 3667 // Floating point support //////////////////////////////////////////////////////////////////// |
3668 | |
3669 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a)) | |
3670 JVMWrapper("JVM_IsNaN"); | |
3671 return g_isnan(a); | |
3672 JVM_END | |
3673 | |
3674 | |
3675 // JNI version /////////////////////////////////////////////////////////////////////////////// | |
3676 | |
3677 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version)) | |
3678 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version); | |
3679 return Threads::is_supported_jni_version_including_1_1(version); | |
3680 JVM_END | |
3681 | |
3682 | |
3683 // String support /////////////////////////////////////////////////////////////////////////// | |
3684 | |
3685 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str)) | |
3686 JVMWrapper("JVM_InternString"); | |
3687 JvmtiVMObjectAllocEventCollector oam; | |
3688 if (str == NULL) return NULL; | |
3689 oop string = JNIHandles::resolve_non_null(str); | |
3690 oop result = StringTable::intern(string, CHECK_NULL); | |
3691 return (jstring) JNIHandles::make_local(env, result); | |
3692 JVM_END | |
3693 | |
3694 | |
3695 // Raw monitor support ////////////////////////////////////////////////////////////////////// | |
3696 | |
3697 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock | |
3698 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because | |
3699 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check | |
3700 // that only works with java threads. | |
3701 | |
3702 | |
3703 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) { | |
3704 VM_Exit::block_if_vm_exited(); | |
3705 JVMWrapper("JVM_RawMonitorCreate"); | |
3706 return new Mutex(Mutex::native, "JVM_RawMonitorCreate"); | |
3707 } | |
3708 | |
3709 | |
3710 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) { | |
3711 VM_Exit::block_if_vm_exited(); | |
3712 JVMWrapper("JVM_RawMonitorDestroy"); | |
3713 delete ((Mutex*) mon); | |
3714 } | |
3715 | |
3716 | |
3717 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) { | |
3718 VM_Exit::block_if_vm_exited(); | |
3719 JVMWrapper("JVM_RawMonitorEnter"); | |
3720 ((Mutex*) mon)->jvm_raw_lock(); | |
3721 return 0; | |
3722 } | |
3723 | |
3724 | |
3725 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) { | |
3726 VM_Exit::block_if_vm_exited(); | |
3727 JVMWrapper("JVM_RawMonitorExit"); | |
3728 ((Mutex*) mon)->jvm_raw_unlock(); | |
3729 } | |
3730 | |
3731 | |
3732 // Support for Serialization | |
3733 | |
3734 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value); | |
3735 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value); | |
3736 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value); | |
3737 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value); | |
3738 | |
3739 static IntBitsToFloatFn int_bits_to_float_fn = NULL; | |
3740 static LongBitsToDoubleFn long_bits_to_double_fn = NULL; | |
3741 static FloatToIntBitsFn float_to_int_bits_fn = NULL; | |
3742 static DoubleToLongBitsFn double_to_long_bits_fn = NULL; | |
3743 | |
3744 | |
3745 void initialize_converter_functions() { | |
3746 if (JDK_Version::is_gte_jdk14x_version()) { | |
3747 // These functions only exist for compatibility with 1.3.1 and earlier | |
3748 return; | |
3749 } | |
3750 | |
3751 // called from universe_post_init() | |
3752 assert( | |
3753 int_bits_to_float_fn == NULL && | |
3754 long_bits_to_double_fn == NULL && | |
3755 float_to_int_bits_fn == NULL && | |
3756 double_to_long_bits_fn == NULL , | |
3757 "initialization done twice" | |
3758 ); | |
3759 // initialize | |
3760 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F")); | |
3761 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D")); | |
3762 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I")); | |
3763 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J")); | |
3764 // verify | |
3765 assert( | |
3766 int_bits_to_float_fn != NULL && | |
3767 long_bits_to_double_fn != NULL && | |
3768 float_to_int_bits_fn != NULL && | |
3769 double_to_long_bits_fn != NULL , | |
3770 "initialization failed" | |
3771 ); | |
3772 } | |
3773 | |
3774 | |
3775 // Serialization | |
3776 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, | |
3777 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) | |
3778 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); | |
3779 | |
3780 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); | |
3781 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); | |
3782 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); | |
3783 oop o = JNIHandles::resolve(obj); | |
3784 | |
3785 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { | |
3786 THROW(vmSymbols::java_lang_NullPointerException()); | |
3787 } | |
3788 | |
3789 jsize nfids = fids->length(); | |
3790 if (nfids == 0) return; | |
3791 | |
3792 if (tcodes->length() < nfids) { | |
3793 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); | |
3794 } | |
3795 | |
3796 jsize off = 0; | |
3797 /* loop through fields, setting values */ | |
3798 for (jsize i = 0; i < nfids; i++) { | |
3799 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); | |
3800 int field_offset; | |
3801 if (fid != NULL) { | |
3802 // NULL is a legal value for fid, but retrieving the field offset | |
3803 // trigger assertion in that case | |
3804 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); | |
3805 } | |
3806 | |
3807 switch (tcodes->char_at(i)) { | |
3808 case 'Z': | |
3809 if (fid != NULL) { | |
3810 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE; | |
3811 o->bool_field_put(field_offset, val); | |
3812 } | |
3813 off++; | |
3814 break; | |
3815 | |
3816 case 'B': | |
3817 if (fid != NULL) { | |
3818 o->byte_field_put(field_offset, dbuf->byte_at(off)); | |
3819 } | |
3820 off++; | |
3821 break; | |
3822 | |
3823 case 'C': | |
3824 if (fid != NULL) { | |
3825 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) | |
3826 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); | |
3827 o->char_field_put(field_offset, val); | |
3828 } | |
3829 off += 2; | |
3830 break; | |
3831 | |
3832 case 'S': | |
3833 if (fid != NULL) { | |
3834 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) | |
3835 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); | |
3836 o->short_field_put(field_offset, val); | |
3837 } | |
3838 off += 2; | |
3839 break; | |
3840 | |
3841 case 'I': | |
3842 if (fid != NULL) { | |
3843 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) | |
3844 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) | |
3845 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) | |
3846 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); | |
3847 o->int_field_put(field_offset, ival); | |
3848 } | |
3849 off += 4; | |
3850 break; | |
3851 | |
3852 case 'F': | |
3853 if (fid != NULL) { | |
3854 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) | |
3855 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) | |
3856 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) | |
3857 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); | |
3858 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival); | |
3859 o->float_field_put(field_offset, fval); | |
3860 } | |
3861 off += 4; | |
3862 break; | |
3863 | |
3864 case 'J': | |
3865 if (fid != NULL) { | |
3866 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) | |
3867 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) | |
3868 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) | |
3869 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) | |
3870 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) | |
3871 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) | |
3872 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) | |
3873 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); | |
3874 o->long_field_put(field_offset, lval); | |
3875 } | |
3876 off += 8; | |
3877 break; | |
3878 | |
3879 case 'D': | |
3880 if (fid != NULL) { | |
3881 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) | |
3882 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) | |
3883 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) | |
3884 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) | |
3885 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) | |
3886 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) | |
3887 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) | |
3888 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); | |
3889 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval); | |
3890 o->double_field_put(field_offset, dval); | |
3891 } | |
3892 off += 8; | |
3893 break; | |
3894 | |
3895 default: | |
3896 // Illegal typecode | |
3897 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); | |
3898 } | |
3899 } | |
3900 JVM_END | |
3901 | |
3902 | |
3903 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, | |
3904 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) | |
3905 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); | |
3906 | |
3907 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); | |
3908 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); | |
3909 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); | |
3910 oop o = JNIHandles::resolve(obj); | |
3911 | |
3912 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { | |
3913 THROW(vmSymbols::java_lang_NullPointerException()); | |
3914 } | |
3915 | |
3916 jsize nfids = fids->length(); | |
3917 if (nfids == 0) return; | |
3918 | |
3919 if (tcodes->length() < nfids) { | |
3920 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); | |
3921 } | |
3922 | |
3923 /* loop through fields, fetching values */ | |
3924 jsize off = 0; | |
3925 for (jsize i = 0; i < nfids; i++) { | |
3926 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); | |
3927 if (fid == NULL) { | |
3928 THROW(vmSymbols::java_lang_NullPointerException()); | |
3929 } | |
3930 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); | |
3931 | |
3932 switch (tcodes->char_at(i)) { | |
3933 case 'Z': | |
3934 { | |
3935 jboolean val = o->bool_field(field_offset); | |
3936 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0); | |
3937 } | |
3938 break; | |
3939 | |
3940 case 'B': | |
3941 dbuf->byte_at_put(off++, o->byte_field(field_offset)); | |
3942 break; | |
3943 | |
3944 case 'C': | |
3945 { | |
3946 jchar val = o->char_field(field_offset); | |
3947 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); | |
3948 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); | |
3949 } | |
3950 break; | |
3951 | |
3952 case 'S': | |
3953 { | |
3954 jshort val = o->short_field(field_offset); | |
3955 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); | |
3956 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); | |
3957 } | |
3958 break; | |
3959 | |
3960 case 'I': | |
3961 { | |
3962 jint val = o->int_field(field_offset); | |
3963 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); | |
3964 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); | |
3965 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); | |
3966 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); | |
3967 } | |
3968 break; | |
3969 | |
3970 case 'F': | |
3971 { | |
3972 jfloat fval = o->float_field(field_offset); | |
3973 jint ival = (*float_to_int_bits_fn)(env, NULL, fval); | |
3974 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF); | |
3975 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF); | |
3976 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF); | |
3977 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF); | |
3978 } | |
3979 break; | |
3980 | |
3981 case 'J': | |
3982 { | |
3983 jlong val = o->long_field(field_offset); | |
3984 dbuf->byte_at_put(off++, (val >> 56) & 0xFF); | |
3985 dbuf->byte_at_put(off++, (val >> 48) & 0xFF); | |
3986 dbuf->byte_at_put(off++, (val >> 40) & 0xFF); | |
3987 dbuf->byte_at_put(off++, (val >> 32) & 0xFF); | |
3988 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); | |
3989 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); | |
3990 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); | |
3991 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); | |
3992 } | |
3993 break; | |
3994 | |
3995 case 'D': | |
3996 { | |
3997 jdouble dval = o->double_field(field_offset); | |
3998 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval); | |
3999 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF); | |
4000 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF); | |
4001 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF); | |
4002 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF); | |
4003 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF); | |
4004 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF); | |
4005 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF); | |
4006 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF); | |
4007 } | |
4008 break; | |
4009 | |
4010 default: | |
4011 // Illegal typecode | |
4012 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); | |
4013 } | |
4014 } | |
4015 JVM_END | |
4016 | |
4017 | |
4018 // Shared JNI/JVM entry points ////////////////////////////////////////////////////////////// | |
4019 | |
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4020 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) { |
0 | 4021 // Security Note: |
4022 // The Java level wrapper will perform the necessary security check allowing | |
4023 // us to pass the NULL as the initiating class loader. | |
4024 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL); | |
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4025 |
0 | 4026 KlassHandle klass_handle(THREAD, klass); |
4027 // Check if we should initialize the class | |
4028 if (init && klass_handle->oop_is_instance()) { | |
4029 klass_handle->initialize(CHECK_NULL); | |
4030 } | |
4031 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror()); | |
4032 } | |
4033 | |
4034 | |
4035 // Internal SQE debugging support /////////////////////////////////////////////////////////// | |
4036 | |
4037 #ifndef PRODUCT | |
4038 | |
4039 extern "C" { | |
4040 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get); | |
4041 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get); | |
4042 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj); | |
4043 } | |
4044 | |
4045 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get)) | |
4046 JVMWrapper("JVM_AccessBoolVMFlag"); | |
4047 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL); | |
4048 JVM_END | |
4049 | |
4050 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get)) | |
4051 JVMWrapper("JVM_AccessVMIntFlag"); | |
4052 intx v; | |
4053 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL); | |
4054 *value = (jint)v; | |
4055 return result; | |
4056 JVM_END | |
4057 | |
4058 | |
4059 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj)) | |
4060 JVMWrapper("JVM_VMBreakPoint"); | |
4061 oop the_obj = JNIHandles::resolve(obj); | |
4062 BREAKPOINT; | |
4063 JVM_END | |
4064 | |
4065 | |
4066 #endif | |
4067 | |
4068 | |
4069 // Method /////////////////////////////////////////////////////////////////////////////////////////// | |
4070 | |
4071 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0)) | |
4072 JVMWrapper("JVM_InvokeMethod"); | |
4073 Handle method_handle; | |
4074 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) { | |
4075 method_handle = Handle(THREAD, JNIHandles::resolve(method)); | |
4076 Handle receiver(THREAD, JNIHandles::resolve(obj)); | |
4077 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); | |
4078 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL); | |
4079 jobject res = JNIHandles::make_local(env, result); | |
4080 if (JvmtiExport::should_post_vm_object_alloc()) { | |
4081 oop ret_type = java_lang_reflect_Method::return_type(method_handle()); | |
4082 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!"); | |
4083 if (java_lang_Class::is_primitive(ret_type)) { | |
4084 // Only for primitive type vm allocates memory for java object. | |
4085 // See box() method. | |
4086 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); | |
4087 } | |
4088 } | |
4089 return res; | |
4090 } else { | |
4091 THROW_0(vmSymbols::java_lang_StackOverflowError()); | |
4092 } | |
4093 JVM_END | |
4094 | |
4095 | |
4096 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0)) | |
4097 JVMWrapper("JVM_NewInstanceFromConstructor"); | |
4098 oop constructor_mirror = JNIHandles::resolve(c); | |
4099 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); | |
4100 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL); | |
4101 jobject res = JNIHandles::make_local(env, result); | |
4102 if (JvmtiExport::should_post_vm_object_alloc()) { | |
4103 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); | |
4104 } | |
4105 return res; | |
4106 JVM_END | |
4107 | |
4108 // Atomic /////////////////////////////////////////////////////////////////////////////////////////// | |
4109 | |
4110 JVM_LEAF(jboolean, JVM_SupportsCX8()) | |
4111 JVMWrapper("JVM_SupportsCX8"); | |
4112 return VM_Version::supports_cx8(); | |
4113 JVM_END | |
4114 | |
4115 | |
4116 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal)) | |
4117 JVMWrapper("JVM_CX8Field"); | |
4118 jlong res; | |
4119 oop o = JNIHandles::resolve(obj); | |
4120 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); | |
4121 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs); | |
4122 | |
4123 assert(VM_Version::supports_cx8(), "cx8 not supported"); | |
4124 res = Atomic::cmpxchg(newVal, addr, oldVal); | |
4125 | |
4126 return res == oldVal; | |
4127 JVM_END | |
4128 | |
116
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4129 // DTrace /////////////////////////////////////////////////////////////////// |
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4130 |
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4131 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env)) |
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4132 JVMWrapper("JVM_DTraceGetVersion"); |
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4133 return (jint)JVM_TRACING_DTRACE_VERSION; |
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4134 JVM_END |
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4135 |
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4136 JVM_ENTRY(jlong,JVM_DTraceActivate( |
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4137 JNIEnv* env, jint version, jstring module_name, jint providers_count, |
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4138 JVM_DTraceProvider* providers)) |
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4139 JVMWrapper("JVM_DTraceActivate"); |
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4140 return DTraceJSDT::activate( |
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4141 version, module_name, providers_count, providers, CHECK_0); |
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4142 JVM_END |
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4143 |
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4144 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method)) |
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4145 JVMWrapper("JVM_DTraceIsProbeEnabled"); |
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4146 return DTraceJSDT::is_probe_enabled(method); |
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4147 JVM_END |
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4148 |
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4149 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle)) |
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4150 JVMWrapper("JVM_DTraceDispose"); |
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4151 DTraceJSDT::dispose(handle); |
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4152 JVM_END |
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4153 |
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4154 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env)) |
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4155 JVMWrapper("JVM_DTraceIsSupported"); |
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4156 return DTraceJSDT::is_supported(); |
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4157 JVM_END |
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4158 |
0 | 4159 // Returns an array of all live Thread objects (VM internal JavaThreads, |
4160 // jvmti agent threads, and JNI attaching threads are skipped) | |
4161 // See CR 6404306 regarding JNI attaching threads | |
4162 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy)) | |
4163 ResourceMark rm(THREAD); | |
4164 ThreadsListEnumerator tle(THREAD, false, false); | |
4165 JvmtiVMObjectAllocEventCollector oam; | |
4166 | |
4167 int num_threads = tle.num_threads(); | |
1142 | 4168 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL); |
0 | 4169 objArrayHandle threads_ah(THREAD, r); |
4170 | |
4171 for (int i = 0; i < num_threads; i++) { | |
4172 Handle h = tle.get_threadObj(i); | |
4173 threads_ah->obj_at_put(i, h()); | |
4174 } | |
4175 | |
4176 return (jobjectArray) JNIHandles::make_local(env, threads_ah()); | |
4177 JVM_END | |
4178 | |
4179 | |
4180 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods | |
4181 // Return StackTraceElement[][], each element is the stack trace of a thread in | |
4182 // the corresponding entry in the given threads array | |
4183 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads)) | |
4184 JVMWrapper("JVM_DumpThreads"); | |
4185 JvmtiVMObjectAllocEventCollector oam; | |
4186 | |
4187 // Check if threads is null | |
4188 if (threads == NULL) { | |
4189 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
4190 } | |
4191 | |
4192 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads)); | |
4193 objArrayHandle ah(THREAD, a); | |
4194 int num_threads = ah->length(); | |
4195 // check if threads is non-empty array | |
4196 if (num_threads == 0) { | |
4197 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); | |
4198 } | |
4199 | |
4200 // check if threads is not an array of objects of Thread class | |
4201 klassOop k = objArrayKlass::cast(ah->klass())->element_klass(); | |
1142 | 4202 if (k != SystemDictionary::Thread_klass()) { |
0 | 4203 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); |
4204 } | |
4205 | |
4206 ResourceMark rm(THREAD); | |
4207 | |
4208 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); | |
4209 for (int i = 0; i < num_threads; i++) { | |
4210 oop thread_obj = ah->obj_at(i); | |
4211 instanceHandle h(THREAD, (instanceOop) thread_obj); | |
4212 thread_handle_array->append(h); | |
4213 } | |
4214 | |
4215 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL); | |
4216 return (jobjectArray)JNIHandles::make_local(env, stacktraces()); | |
4217 | |
4218 JVM_END | |
4219 | |
4220 // JVM monitoring and management support | |
4221 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version)) | |
4222 return Management::get_jmm_interface(version); | |
4223 JVM_END | |
4224 | |
4225 // com.sun.tools.attach.VirtualMachine agent properties support | |
4226 // | |
4227 // Initialize the agent properties with the properties maintained in the VM | |
4228 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties)) | |
4229 JVMWrapper("JVM_InitAgentProperties"); | |
4230 ResourceMark rm; | |
4231 | |
4232 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); | |
4233 | |
4234 PUTPROP(props, "sun.java.command", Arguments::java_command()); | |
4235 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags()); | |
4236 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args()); | |
4237 return properties; | |
4238 JVM_END | |
4239 | |
4240 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass)) | |
4241 { | |
4242 JVMWrapper("JVM_GetEnclosingMethodInfo"); | |
4243 JvmtiVMObjectAllocEventCollector oam; | |
4244 | |
4245 if (ofClass == NULL) { | |
4246 return NULL; | |
4247 } | |
4248 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass)); | |
4249 // Special handling for primitive objects | |
4250 if (java_lang_Class::is_primitive(mirror())) { | |
4251 return NULL; | |
4252 } | |
4253 klassOop k = java_lang_Class::as_klassOop(mirror()); | |
4254 if (!Klass::cast(k)->oop_is_instance()) { | |
4255 return NULL; | |
4256 } | |
4257 instanceKlassHandle ik_h(THREAD, k); | |
4258 int encl_method_class_idx = ik_h->enclosing_method_class_index(); | |
4259 if (encl_method_class_idx == 0) { | |
4260 return NULL; | |
4261 } | |
1142 | 4262 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL); |
0 | 4263 objArrayHandle dest(THREAD, dest_o); |
4264 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL); | |
4265 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror()); | |
4266 int encl_method_method_idx = ik_h->enclosing_method_method_index(); | |
4267 if (encl_method_method_idx != 0) { | |
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4268 Symbol* sym = ik_h->constants()->symbol_at( |
0 | 4269 extract_low_short_from_int( |
4270 ik_h->constants()->name_and_type_at(encl_method_method_idx))); | |
4271 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); | |
4272 dest->obj_at_put(1, str()); | |
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4273 sym = ik_h->constants()->symbol_at( |
0 | 4274 extract_high_short_from_int( |
4275 ik_h->constants()->name_and_type_at(encl_method_method_idx))); | |
4276 str = java_lang_String::create_from_symbol(sym, CHECK_NULL); | |
4277 dest->obj_at_put(2, str()); | |
4278 } | |
4279 return (jobjectArray) JNIHandles::make_local(dest()); | |
4280 } | |
4281 JVM_END | |
4282 | |
4283 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env, | |
4284 jint javaThreadState)) | |
4285 { | |
4286 // If new thread states are added in future JDK and VM versions, | |
4287 // this should check if the JDK version is compatible with thread | |
4288 // states supported by the VM. Return NULL if not compatible. | |
4289 // | |
4290 // This function must map the VM java_lang_Thread::ThreadStatus | |
4291 // to the Java thread state that the JDK supports. | |
4292 // | |
4293 | |
4294 typeArrayHandle values_h; | |
4295 switch (javaThreadState) { | |
4296 case JAVA_THREAD_STATE_NEW : { | |
4297 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4298 values_h = typeArrayHandle(THREAD, r); | |
4299 values_h->int_at_put(0, java_lang_Thread::NEW); | |
4300 break; | |
4301 } | |
4302 case JAVA_THREAD_STATE_RUNNABLE : { | |
4303 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4304 values_h = typeArrayHandle(THREAD, r); | |
4305 values_h->int_at_put(0, java_lang_Thread::RUNNABLE); | |
4306 break; | |
4307 } | |
4308 case JAVA_THREAD_STATE_BLOCKED : { | |
4309 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4310 values_h = typeArrayHandle(THREAD, r); | |
4311 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); | |
4312 break; | |
4313 } | |
4314 case JAVA_THREAD_STATE_WAITING : { | |
4315 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL); | |
4316 values_h = typeArrayHandle(THREAD, r); | |
4317 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT); | |
4318 values_h->int_at_put(1, java_lang_Thread::PARKED); | |
4319 break; | |
4320 } | |
4321 case JAVA_THREAD_STATE_TIMED_WAITING : { | |
4322 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL); | |
4323 values_h = typeArrayHandle(THREAD, r); | |
4324 values_h->int_at_put(0, java_lang_Thread::SLEEPING); | |
4325 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED); | |
4326 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED); | |
4327 break; | |
4328 } | |
4329 case JAVA_THREAD_STATE_TERMINATED : { | |
4330 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4331 values_h = typeArrayHandle(THREAD, r); | |
4332 values_h->int_at_put(0, java_lang_Thread::TERMINATED); | |
4333 break; | |
4334 } | |
4335 default: | |
4336 // Unknown state - probably incompatible JDK version | |
4337 return NULL; | |
4338 } | |
4339 | |
4340 return (jintArray) JNIHandles::make_local(env, values_h()); | |
4341 } | |
4342 JVM_END | |
4343 | |
4344 | |
4345 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env, | |
4346 jint javaThreadState, | |
4347 jintArray values)) | |
4348 { | |
4349 // If new thread states are added in future JDK and VM versions, | |
4350 // this should check if the JDK version is compatible with thread | |
4351 // states supported by the VM. Return NULL if not compatible. | |
4352 // | |
4353 // This function must map the VM java_lang_Thread::ThreadStatus | |
4354 // to the Java thread state that the JDK supports. | |
4355 // | |
4356 | |
4357 ResourceMark rm; | |
4358 | |
4359 // Check if threads is null | |
4360 if (values == NULL) { | |
4361 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
4362 } | |
4363 | |
4364 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values)); | |
4365 typeArrayHandle values_h(THREAD, v); | |
4366 | |
4367 objArrayHandle names_h; | |
4368 switch (javaThreadState) { | |
4369 case JAVA_THREAD_STATE_NEW : { | |
4370 assert(values_h->length() == 1 && | |
4371 values_h->int_at(0) == java_lang_Thread::NEW, | |
4372 "Invalid threadStatus value"); | |
4373 | |
1142 | 4374 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4375 1, /* only 1 substate */ |
4376 CHECK_NULL); | |
4377 names_h = objArrayHandle(THREAD, r); | |
4378 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL); | |
4379 names_h->obj_at_put(0, name()); | |
4380 break; | |
4381 } | |
4382 case JAVA_THREAD_STATE_RUNNABLE : { | |
4383 assert(values_h->length() == 1 && | |
4384 values_h->int_at(0) == java_lang_Thread::RUNNABLE, | |
4385 "Invalid threadStatus value"); | |
4386 | |
1142 | 4387 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4388 1, /* only 1 substate */ |
4389 CHECK_NULL); | |
4390 names_h = objArrayHandle(THREAD, r); | |
4391 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL); | |
4392 names_h->obj_at_put(0, name()); | |
4393 break; | |
4394 } | |
4395 case JAVA_THREAD_STATE_BLOCKED : { | |
4396 assert(values_h->length() == 1 && | |
4397 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER, | |
4398 "Invalid threadStatus value"); | |
4399 | |
1142 | 4400 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4401 1, /* only 1 substate */ |
4402 CHECK_NULL); | |
4403 names_h = objArrayHandle(THREAD, r); | |
4404 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL); | |
4405 names_h->obj_at_put(0, name()); | |
4406 break; | |
4407 } | |
4408 case JAVA_THREAD_STATE_WAITING : { | |
4409 assert(values_h->length() == 2 && | |
4410 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT && | |
4411 values_h->int_at(1) == java_lang_Thread::PARKED, | |
4412 "Invalid threadStatus value"); | |
1142 | 4413 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4414 2, /* number of substates */ |
4415 CHECK_NULL); | |
4416 names_h = objArrayHandle(THREAD, r); | |
4417 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT", | |
4418 CHECK_NULL); | |
4419 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED", | |
4420 CHECK_NULL); | |
4421 names_h->obj_at_put(0, name0()); | |
4422 names_h->obj_at_put(1, name1()); | |
4423 break; | |
4424 } | |
4425 case JAVA_THREAD_STATE_TIMED_WAITING : { | |
4426 assert(values_h->length() == 3 && | |
4427 values_h->int_at(0) == java_lang_Thread::SLEEPING && | |
4428 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED && | |
4429 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED, | |
4430 "Invalid threadStatus value"); | |
1142 | 4431 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4432 3, /* number of substates */ |
4433 CHECK_NULL); | |
4434 names_h = objArrayHandle(THREAD, r); | |
4435 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING", | |
4436 CHECK_NULL); | |
4437 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT", | |
4438 CHECK_NULL); | |
4439 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED", | |
4440 CHECK_NULL); | |
4441 names_h->obj_at_put(0, name0()); | |
4442 names_h->obj_at_put(1, name1()); | |
4443 names_h->obj_at_put(2, name2()); | |
4444 break; | |
4445 } | |
4446 case JAVA_THREAD_STATE_TERMINATED : { | |
4447 assert(values_h->length() == 1 && | |
4448 values_h->int_at(0) == java_lang_Thread::TERMINATED, | |
4449 "Invalid threadStatus value"); | |
1142 | 4450 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4451 1, /* only 1 substate */ |
4452 CHECK_NULL); | |
4453 names_h = objArrayHandle(THREAD, r); | |
4454 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL); | |
4455 names_h->obj_at_put(0, name()); | |
4456 break; | |
4457 } | |
4458 default: | |
4459 // Unknown state - probably incompatible JDK version | |
4460 return NULL; | |
4461 } | |
4462 return (jobjectArray) JNIHandles::make_local(env, names_h()); | |
4463 } | |
4464 JVM_END | |
4465 | |
4466 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size)) | |
4467 { | |
4468 memset(info, 0, sizeof(info_size)); | |
4469 | |
4470 info->jvm_version = Abstract_VM_Version::jvm_version(); | |
4471 info->update_version = 0; /* 0 in HotSpot Express VM */ | |
4472 info->special_update_version = 0; /* 0 in HotSpot Express VM */ | |
4473 | |
4474 // when we add a new capability in the jvm_version_info struct, we should also | |
4475 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat | |
4476 // counter defined in runtimeService.cpp. | |
4477 info->is_attachable = AttachListener::is_attach_supported(); | |
4478 #ifdef KERNEL | |
4479 info->is_kernel_jvm = 1; // true; | |
4480 #else // KERNEL | |
4481 info->is_kernel_jvm = 0; // false; | |
4482 #endif // KERNEL | |
4483 } | |
4484 JVM_END |