Mercurial > hg > truffle
annotate src/share/vm/prims/jvm.cpp @ 20470:bc4ce33c0985
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Reviewed-by: roland, iveresov
author | vlivanov |
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date | Mon, 14 Jul 2014 03:27:21 -0700 |
parents | 6e0cb14ce59b |
children | 8cb56c8cb30d |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2014, 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" | |
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31 #if INCLUDE_CDS |
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32 #include "classfile/sharedClassUtil.hpp" |
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33 #include "classfile/systemDictionaryShared.hpp" |
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34 #endif |
1972 | 35 #include "classfile/vmSymbols.hpp" |
36 #include "gc_interface/collectedHeap.inline.hpp" | |
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37 #include "interpreter/bytecode.hpp" |
1972 | 38 #include "memory/oopFactory.hpp" |
39 #include "memory/universe.inline.hpp" | |
3938 | 40 #include "oops/fieldStreams.hpp" |
1972 | 41 #include "oops/instanceKlass.hpp" |
42 #include "oops/objArrayKlass.hpp" | |
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43 #include "oops/method.hpp" |
1972 | 44 #include "prims/jvm.h" |
45 #include "prims/jvm_misc.hpp" | |
46 #include "prims/jvmtiExport.hpp" | |
47 #include "prims/jvmtiThreadState.hpp" | |
48 #include "prims/nativeLookup.hpp" | |
49 #include "prims/privilegedStack.hpp" | |
50 #include "runtime/arguments.hpp" | |
51 #include "runtime/dtraceJSDT.hpp" | |
52 #include "runtime/handles.inline.hpp" | |
53 #include "runtime/init.hpp" | |
54 #include "runtime/interfaceSupport.hpp" | |
55 #include "runtime/java.hpp" | |
56 #include "runtime/javaCalls.hpp" | |
57 #include "runtime/jfieldIDWorkaround.hpp" | |
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58 #include "runtime/orderAccess.inline.hpp" |
1972 | 59 #include "runtime/os.hpp" |
60 #include "runtime/perfData.hpp" | |
61 #include "runtime/reflection.hpp" | |
62 #include "runtime/vframe.hpp" | |
63 #include "runtime/vm_operations.hpp" | |
64 #include "services/attachListener.hpp" | |
65 #include "services/management.hpp" | |
66 #include "services/threadService.hpp" | |
10405 | 67 #include "trace/tracing.hpp" |
1972 | 68 #include "utilities/copy.hpp" |
69 #include "utilities/defaultStream.hpp" | |
70 #include "utilities/dtrace.hpp" | |
71 #include "utilities/events.hpp" | |
72 #include "utilities/histogram.hpp" | |
73 #include "utilities/top.hpp" | |
74 #include "utilities/utf8.hpp" | |
75 #ifdef TARGET_OS_FAMILY_linux | |
76 # include "jvm_linux.h" | |
77 #endif | |
78 #ifdef TARGET_OS_FAMILY_solaris | |
79 # include "jvm_solaris.h" | |
80 #endif | |
81 #ifdef TARGET_OS_FAMILY_windows | |
82 # include "jvm_windows.h" | |
83 #endif | |
14411 | 84 #ifdef TARGET_OS_FAMILY_aix |
85 # include "jvm_aix.h" | |
86 #endif | |
3960 | 87 #ifdef TARGET_OS_FAMILY_bsd |
88 # include "jvm_bsd.h" | |
89 #endif | |
1972 | 90 |
0 | 91 #include <errno.h> |
92 | |
4006 | 93 #ifndef USDT2 |
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94 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long); |
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95 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int); |
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96 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield); |
4006 | 97 #endif /* !USDT2 */ |
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98 |
0 | 99 /* |
100 NOTE about use of any ctor or function call that can trigger a safepoint/GC: | |
101 such ctors and calls MUST NOT come between an oop declaration/init and its | |
102 usage because if objects are move this may cause various memory stomps, bus | |
103 errors and segfaults. Here is a cookbook for causing so called "naked oop | |
104 failures": | |
105 | |
106 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> { | |
107 JVMWrapper("JVM_GetClassDeclaredFields"); | |
108 | |
109 // Object address to be held directly in mirror & not visible to GC | |
110 oop mirror = JNIHandles::resolve_non_null(ofClass); | |
111 | |
112 // If this ctor can hit a safepoint, moving objects around, then | |
113 ComplexConstructor foo; | |
114 | |
115 // Boom! mirror may point to JUNK instead of the intended object | |
116 (some dereference of mirror) | |
117 | |
118 // Here's another call that may block for GC, making mirror stale | |
119 MutexLocker ml(some_lock); | |
120 | |
121 // And here's an initializer that can result in a stale oop | |
122 // all in one step. | |
123 oop o = call_that_can_throw_exception(TRAPS); | |
124 | |
125 | |
126 The solution is to keep the oop declaration BELOW the ctor or function | |
127 call that might cause a GC, do another resolve to reassign the oop, or | |
128 consider use of a Handle instead of an oop so there is immunity from object | |
129 motion. But note that the "QUICK" entries below do not have a handlemark | |
130 and thus can only support use of handles passed in. | |
131 */ | |
132 | |
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133 static void trace_class_resolution_impl(Klass* to_class, TRAPS) { |
0 | 134 ResourceMark rm; |
135 int line_number = -1; | |
136 const char * source_file = NULL; | |
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137 const char * trace = "explicit"; |
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138 InstanceKlass* caller = NULL; |
0 | 139 JavaThread* jthread = JavaThread::current(); |
140 if (jthread->has_last_Java_frame()) { | |
141 vframeStream vfst(jthread); | |
142 | |
143 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames | |
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144 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK); |
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145 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK); |
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146 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK); |
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147 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK); |
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148 |
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149 Method* last_caller = NULL; |
0 | 150 |
151 while (!vfst.at_end()) { | |
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152 Method* m = vfst.method(); |
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153 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&& |
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154 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) && |
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155 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) { |
0 | 156 break; |
157 } | |
158 last_caller = m; | |
159 vfst.next(); | |
160 } | |
161 // if this is called from Class.forName0 and that is called from Class.forName, | |
162 // then print the caller of Class.forName. If this is Class.loadClass, then print | |
163 // that caller, otherwise keep quiet since this should be picked up elsewhere. | |
164 bool found_it = false; | |
165 if (!vfst.at_end() && | |
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166 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() && |
0 | 167 vfst.method()->name() == vmSymbols::forName0_name()) { |
168 vfst.next(); | |
169 if (!vfst.at_end() && | |
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170 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() && |
0 | 171 vfst.method()->name() == vmSymbols::forName_name()) { |
172 vfst.next(); | |
173 found_it = true; | |
174 } | |
175 } else if (last_caller != NULL && | |
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176 last_caller->method_holder()->name() == |
0 | 177 vmSymbols::java_lang_ClassLoader() && |
178 (last_caller->name() == vmSymbols::loadClassInternal_name() || | |
179 last_caller->name() == vmSymbols::loadClass_name())) { | |
180 found_it = true; | |
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181 } else if (!vfst.at_end()) { |
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182 if (vfst.method()->is_native()) { |
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183 // JNI call |
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184 found_it = true; |
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185 } |
0 | 186 } |
187 if (found_it && !vfst.at_end()) { | |
188 // found the caller | |
189 caller = vfst.method()->method_holder(); | |
190 line_number = vfst.method()->line_number_from_bci(vfst.bci()); | |
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191 if (line_number == -1) { |
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192 // show method name if it's a native method |
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193 trace = vfst.method()->name_and_sig_as_C_string(); |
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194 } |
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195 Symbol* s = caller->source_file_name(); |
0 | 196 if (s != NULL) { |
197 source_file = s->as_C_string(); | |
198 } | |
199 } | |
200 } | |
201 if (caller != NULL) { | |
202 if (to_class != caller) { | |
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203 const char * from = caller->external_name(); |
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204 const char * to = to_class->external_name(); |
0 | 205 // print in a single call to reduce interleaving between threads |
206 if (source_file != NULL) { | |
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207 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace); |
0 | 208 } else { |
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209 tty->print("RESOLVE %s %s (%s)\n", from, to, trace); |
0 | 210 } |
211 } | |
212 } | |
213 } | |
214 | |
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215 void trace_class_resolution(Klass* to_class) { |
0 | 216 EXCEPTION_MARK; |
217 trace_class_resolution_impl(to_class, THREAD); | |
218 if (HAS_PENDING_EXCEPTION) { | |
219 CLEAR_PENDING_EXCEPTION; | |
220 } | |
221 } | |
222 | |
223 // Wrapper to trace JVM functions | |
224 | |
225 #ifdef ASSERT | |
226 class JVMTraceWrapper : public StackObj { | |
227 public: | |
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228 JVMTraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) { |
0 | 229 if (TraceJVMCalls) { |
230 va_list ap; | |
231 va_start(ap, format); | |
232 tty->print("JVM "); | |
233 tty->vprint_cr(format, ap); | |
234 va_end(ap); | |
235 } | |
236 } | |
237 }; | |
238 | |
239 Histogram* JVMHistogram; | |
240 volatile jint JVMHistogram_lock = 0; | |
241 | |
242 class JVMHistogramElement : public HistogramElement { | |
243 public: | |
244 JVMHistogramElement(const char* name); | |
245 }; | |
246 | |
247 JVMHistogramElement::JVMHistogramElement(const char* elementName) { | |
248 _name = elementName; | |
249 uintx count = 0; | |
250 | |
251 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) { | |
252 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) { | |
253 count +=1; | |
254 if ( (WarnOnStalledSpinLock > 0) | |
255 && (count % WarnOnStalledSpinLock == 0)) { | |
256 warning("JVMHistogram_lock seems to be stalled"); | |
257 } | |
258 } | |
259 } | |
260 | |
261 if(JVMHistogram == NULL) | |
262 JVMHistogram = new Histogram("JVM Call Counts",100); | |
263 | |
264 JVMHistogram->add_element(this); | |
265 Atomic::dec(&JVMHistogram_lock); | |
266 } | |
267 | |
268 #define JVMCountWrapper(arg) \ | |
269 static JVMHistogramElement* e = new JVMHistogramElement(arg); \ | |
270 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen! | |
271 | |
272 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1) | |
273 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2) | |
274 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3) | |
275 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4) | |
276 #else | |
277 #define JVMWrapper(arg1) | |
278 #define JVMWrapper2(arg1, arg2) | |
279 #define JVMWrapper3(arg1, arg2, arg3) | |
280 #define JVMWrapper4(arg1, arg2, arg3, arg4) | |
281 #endif | |
282 | |
283 | |
284 // Interface version ///////////////////////////////////////////////////////////////////// | |
285 | |
286 | |
287 JVM_LEAF(jint, JVM_GetInterfaceVersion()) | |
288 return JVM_INTERFACE_VERSION; | |
289 JVM_END | |
290 | |
291 | |
292 // java.lang.System ////////////////////////////////////////////////////////////////////// | |
293 | |
294 | |
295 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored)) | |
296 JVMWrapper("JVM_CurrentTimeMillis"); | |
297 return os::javaTimeMillis(); | |
298 JVM_END | |
299 | |
300 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored)) | |
301 JVMWrapper("JVM_NanoTime"); | |
302 return os::javaTimeNanos(); | |
303 JVM_END | |
304 | |
305 | |
306 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos, | |
307 jobject dst, jint dst_pos, jint length)) | |
308 JVMWrapper("JVM_ArrayCopy"); | |
309 // Check if we have null pointers | |
310 if (src == NULL || dst == NULL) { | |
311 THROW(vmSymbols::java_lang_NullPointerException()); | |
312 } | |
313 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src)); | |
314 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst)); | |
315 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop"); | |
316 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop"); | |
317 // Do copy | |
6983 | 318 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread); |
0 | 319 JVM_END |
320 | |
321 | |
322 static void set_property(Handle props, const char* key, const char* value, TRAPS) { | |
323 JavaValue r(T_OBJECT); | |
324 // public synchronized Object put(Object key, Object value); | |
325 HandleMark hm(THREAD); | |
326 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK); | |
327 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK); | |
328 JavaCalls::call_virtual(&r, | |
329 props, | |
1142 | 330 KlassHandle(THREAD, SystemDictionary::Properties_klass()), |
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331 vmSymbols::put_name(), |
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332 vmSymbols::object_object_object_signature(), |
0 | 333 key_str, |
334 value_str, | |
335 THREAD); | |
336 } | |
337 | |
338 | |
339 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties)); | |
340 | |
341 | |
342 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties)) | |
343 JVMWrapper("JVM_InitProperties"); | |
344 ResourceMark rm; | |
345 | |
346 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); | |
347 | |
348 // System property list includes both user set via -D option and | |
349 // jvm system specific properties. | |
350 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { | |
351 PUTPROP(props, p->key(), p->value()); | |
352 } | |
353 | |
354 // Convert the -XX:MaxDirectMemorySize= command line flag | |
355 // to the sun.nio.MaxDirectMemorySize property. | |
356 // Do this after setting user properties to prevent people | |
357 // from setting the value with a -D option, as requested. | |
358 { | |
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359 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) { |
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360 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1"); |
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361 } else { |
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362 char as_chars[256]; |
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363 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize); |
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364 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars); |
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365 } |
0 | 366 } |
367 | |
368 // JVM monitoring and management support | |
369 // Add the sun.management.compiler property for the compiler's name | |
370 { | |
371 #undef CSIZE | |
372 #if defined(_LP64) || defined(_WIN64) | |
373 #define CSIZE "64-Bit " | |
374 #else | |
375 #define CSIZE | |
376 #endif // 64bit | |
377 | |
378 #ifdef TIERED | |
379 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers"; | |
380 #else | |
381 #if defined(COMPILER1) | |
382 const char* compiler_name = "HotSpot " CSIZE "Client Compiler"; | |
383 #elif defined(COMPILER2) | |
384 const char* compiler_name = "HotSpot " CSIZE "Server Compiler"; | |
385 #else | |
386 const char* compiler_name = ""; | |
387 #endif // compilers | |
388 #endif // TIERED | |
389 | |
390 if (*compiler_name != '\0' && | |
391 (Arguments::mode() != Arguments::_int)) { | |
392 PUTPROP(props, "sun.management.compiler", compiler_name); | |
393 } | |
394 } | |
395 | |
396 return properties; | |
397 JVM_END | |
398 | |
399 | |
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400 /* |
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401 * Return the temporary directory that the VM uses for the attach |
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402 * and perf data files. |
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403 * |
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404 * It is important that this directory is well-known and the |
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405 * same for all VM instances. It cannot be affected by configuration |
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406 * variables such as java.io.tmpdir. |
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407 */ |
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408 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env)) |
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409 JVMWrapper("JVM_GetTemporaryDirectory"); |
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410 HandleMark hm(THREAD); |
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411 const char* temp_dir = os::get_temp_directory(); |
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412 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL); |
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413 return (jstring) JNIHandles::make_local(env, h()); |
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414 JVM_END |
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415 |
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416 |
0 | 417 // java.lang.Runtime ///////////////////////////////////////////////////////////////////////// |
418 | |
419 extern volatile jint vm_created; | |
420 | |
421 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code)) | |
422 if (vm_created != 0 && (code == 0)) { | |
423 // The VM is about to exit. We call back into Java to check whether finalizers should be run | |
424 Universe::run_finalizers_on_exit(); | |
425 } | |
426 before_exit(thread); | |
427 vm_exit(code); | |
428 JVM_END | |
429 | |
430 | |
431 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code)) | |
432 before_exit(thread); | |
433 vm_exit(code); | |
434 JVM_END | |
435 | |
436 | |
437 JVM_LEAF(void, JVM_OnExit(void (*func)(void))) | |
438 register_on_exit_function(func); | |
439 JVM_END | |
440 | |
441 | |
442 JVM_ENTRY_NO_ENV(void, JVM_GC(void)) | |
443 JVMWrapper("JVM_GC"); | |
444 if (!DisableExplicitGC) { | |
445 Universe::heap()->collect(GCCause::_java_lang_system_gc); | |
446 } | |
447 JVM_END | |
448 | |
449 | |
450 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void)) | |
451 JVMWrapper("JVM_MaxObjectInspectionAge"); | |
452 return Universe::heap()->millis_since_last_gc(); | |
453 JVM_END | |
454 | |
455 | |
456 JVM_LEAF(void, JVM_TraceInstructions(jboolean on)) | |
457 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported"); | |
458 JVM_END | |
459 | |
460 | |
461 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on)) | |
462 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported"); | |
463 JVM_END | |
464 | |
465 static inline jlong convert_size_t_to_jlong(size_t val) { | |
466 // In the 64-bit vm, a size_t can overflow a jlong (which is signed). | |
467 NOT_LP64 (return (jlong)val;) | |
468 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);) | |
469 } | |
470 | |
471 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void)) | |
472 JVMWrapper("JVM_TotalMemory"); | |
473 size_t n = Universe::heap()->capacity(); | |
474 return convert_size_t_to_jlong(n); | |
475 JVM_END | |
476 | |
477 | |
478 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void)) | |
479 JVMWrapper("JVM_FreeMemory"); | |
480 CollectedHeap* ch = Universe::heap(); | |
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481 size_t n; |
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482 { |
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483 MutexLocker x(Heap_lock); |
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484 n = ch->capacity() - ch->used(); |
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485 } |
0 | 486 return convert_size_t_to_jlong(n); |
487 JVM_END | |
488 | |
489 | |
490 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void)) | |
491 JVMWrapper("JVM_MaxMemory"); | |
492 size_t n = Universe::heap()->max_capacity(); | |
493 return convert_size_t_to_jlong(n); | |
494 JVM_END | |
495 | |
496 | |
497 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void)) | |
498 JVMWrapper("JVM_ActiveProcessorCount"); | |
499 return os::active_processor_count(); | |
500 JVM_END | |
501 | |
502 | |
503 | |
504 // java.lang.Throwable ////////////////////////////////////////////////////// | |
505 | |
506 | |
507 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver)) | |
508 JVMWrapper("JVM_FillInStackTrace"); | |
509 Handle exception(thread, JNIHandles::resolve_non_null(receiver)); | |
510 java_lang_Throwable::fill_in_stack_trace(exception); | |
511 JVM_END | |
512 | |
513 | |
514 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable)) | |
515 JVMWrapper("JVM_GetStackTraceDepth"); | |
516 oop exception = JNIHandles::resolve(throwable); | |
517 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD); | |
518 JVM_END | |
519 | |
520 | |
521 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index)) | |
522 JVMWrapper("JVM_GetStackTraceElement"); | |
523 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC | |
524 oop exception = JNIHandles::resolve(throwable); | |
525 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL); | |
526 return JNIHandles::make_local(env, element); | |
527 JVM_END | |
528 | |
529 | |
530 // java.lang.Object /////////////////////////////////////////////// | |
531 | |
532 | |
533 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle)) | |
534 JVMWrapper("JVM_IHashCode"); | |
535 // as implemented in the classic virtual machine; return 0 if object is NULL | |
536 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ; | |
537 JVM_END | |
538 | |
539 | |
540 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms)) | |
541 JVMWrapper("JVM_MonitorWait"); | |
542 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
543 JavaThreadInObjectWaitState jtiows(thread, ms != 0); | |
544 if (JvmtiExport::should_post_monitor_wait()) { | |
545 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms); | |
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546 |
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547 // The current thread already owns the monitor and it has not yet |
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548 // been added to the wait queue so the current thread cannot be |
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549 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT |
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550 // event handler cannot accidentally consume an unpark() meant for |
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551 // the ParkEvent associated with this ObjectMonitor. |
0 | 552 } |
553 ObjectSynchronizer::wait(obj, ms, CHECK); | |
554 JVM_END | |
555 | |
556 | |
557 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle)) | |
558 JVMWrapper("JVM_MonitorNotify"); | |
559 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
560 ObjectSynchronizer::notify(obj, CHECK); | |
561 JVM_END | |
562 | |
563 | |
564 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle)) | |
565 JVMWrapper("JVM_MonitorNotifyAll"); | |
566 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
567 ObjectSynchronizer::notifyall(obj, CHECK); | |
568 JVM_END | |
569 | |
570 | |
571 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle)) | |
572 JVMWrapper("JVM_Clone"); | |
573 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
574 const KlassHandle klass (THREAD, obj->klass()); | |
575 JvmtiVMObjectAllocEventCollector oam; | |
576 | |
577 #ifdef ASSERT | |
578 // Just checking that the cloneable flag is set correct | |
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579 if (obj->is_array()) { |
0 | 580 guarantee(klass->is_cloneable(), "all arrays are cloneable"); |
581 } else { | |
582 guarantee(obj->is_instance(), "should be instanceOop"); | |
1142 | 583 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass()); |
0 | 584 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag"); |
585 } | |
586 #endif | |
587 | |
588 // Check if class of obj supports the Cloneable interface. | |
589 // All arrays are considered to be cloneable (See JLS 20.1.5) | |
590 if (!klass->is_cloneable()) { | |
591 ResourceMark rm(THREAD); | |
592 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name()); | |
593 } | |
594 | |
595 // Make shallow object copy | |
596 const int size = obj->size(); | |
597 oop new_obj = NULL; | |
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598 if (obj->is_array()) { |
0 | 599 const int length = ((arrayOop)obj())->length(); |
600 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL); | |
601 } else { | |
602 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL); | |
603 } | |
604 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread | |
605 // is modifying a reference field in the clonee, a non-oop-atomic copy might | |
606 // be suspended in the middle of copying the pointer and end up with parts | |
607 // of two different pointers in the field. Subsequent dereferences will crash. | |
608 // 4846409: an oop-copy of objects with long or double fields or arrays of same | |
609 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead | |
610 // of oops. We know objects are aligned on a minimum of an jlong boundary. | |
611 // The same is true of StubRoutines::object_copy and the various oop_copy | |
612 // variants, and of the code generated by the inline_native_clone intrinsic. | |
613 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned"); | |
614 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj, | |
615 (size_t)align_object_size(size) / HeapWordsPerLong); | |
616 // Clear the header | |
617 new_obj->init_mark(); | |
618 | |
619 // Store check (mark entire object and let gc sort it out) | |
620 BarrierSet* bs = Universe::heap()->barrier_set(); | |
621 assert(bs->has_write_region_opt(), "Barrier set does not have write_region"); | |
622 bs->write_region(MemRegion((HeapWord*)new_obj, size)); | |
623 | |
624 // Caution: this involves a java upcall, so the clone should be | |
625 // "gc-robust" by this stage. | |
626 if (klass->has_finalizer()) { | |
627 assert(obj->is_instance(), "should be instanceOop"); | |
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628 new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL); |
0 | 629 } |
630 | |
631 return JNIHandles::make_local(env, oop(new_obj)); | |
632 JVM_END | |
633 | |
634 // java.lang.Compiler //////////////////////////////////////////////////// | |
635 | |
636 // The initial cuts of the HotSpot VM will not support JITs, and all existing | |
637 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM | |
638 // functions are all silently ignored unless JVM warnings are printed. | |
639 | |
640 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls)) | |
641 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported"); | |
642 JVM_END | |
643 | |
644 | |
645 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls)) | |
646 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported"); | |
647 return JNI_FALSE; | |
648 JVM_END | |
649 | |
650 | |
651 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls)) | |
652 if (PrintJVMWarnings) warning("JVM_CompileClass not supported"); | |
653 return JNI_FALSE; | |
654 JVM_END | |
655 | |
656 | |
657 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname)) | |
658 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported"); | |
659 return JNI_FALSE; | |
660 JVM_END | |
661 | |
662 | |
663 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg)) | |
664 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported"); | |
665 return NULL; | |
666 JVM_END | |
667 | |
668 | |
669 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls)) | |
670 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported"); | |
671 JVM_END | |
672 | |
673 | |
674 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls)) | |
675 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported"); | |
676 JVM_END | |
677 | |
678 | |
679 | |
680 // Error message support ////////////////////////////////////////////////////// | |
681 | |
682 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len)) | |
683 JVMWrapper("JVM_GetLastErrorString"); | |
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684 return (jint)os::lasterror(buf, len); |
0 | 685 JVM_END |
686 | |
687 | |
688 // java.io.File /////////////////////////////////////////////////////////////// | |
689 | |
690 JVM_LEAF(char*, JVM_NativePath(char* path)) | |
691 JVMWrapper2("JVM_NativePath (%s)", path); | |
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692 return os::native_path(path); |
0 | 693 JVM_END |
694 | |
695 | |
696 // Misc. class handling /////////////////////////////////////////////////////////// | |
697 | |
698 | |
699 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth)) | |
700 JVMWrapper("JVM_GetCallerClass"); | |
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701 |
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702 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or |
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703 // sun.reflect.Reflection.getCallerClass with a depth parameter is provided |
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704 // temporarily for existing code to use until a replacement API is defined. |
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705 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) { |
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706 Klass* k = thread->security_get_caller_class(depth); |
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707 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror()); |
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708 } |
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709 |
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710 // Getting the class of the caller frame. |
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711 // |
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712 // The call stack at this point looks something like this: |
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713 // |
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714 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ] |
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715 // [1] [ @CallerSensitive API.method ] |
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716 // [.] [ (skipped intermediate frames) ] |
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717 // [n] [ caller ] |
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718 vframeStream vfst(thread); |
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719 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass |
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720 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) { |
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721 Method* m = vfst.method(); |
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722 assert(m != NULL, "sanity"); |
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723 switch (n) { |
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724 case 0: |
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725 // This must only be called from Reflection.getCallerClass |
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726 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) { |
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727 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass"); |
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728 } |
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729 // fall-through |
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730 case 1: |
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731 // Frame 0 and 1 must be caller sensitive. |
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732 if (!m->caller_sensitive()) { |
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733 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n)); |
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734 } |
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735 break; |
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736 default: |
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737 if (!m->is_ignored_by_security_stack_walk()) { |
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738 // We have reached the desired frame; return the holder class. |
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739 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror()); |
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740 } |
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741 break; |
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742 } |
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743 } |
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744 return NULL; |
0 | 745 JVM_END |
746 | |
747 | |
748 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf)) | |
749 JVMWrapper("JVM_FindPrimitiveClass"); | |
750 oop mirror = NULL; | |
751 BasicType t = name2type(utf); | |
752 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) { | |
753 mirror = Universe::java_mirror(t); | |
754 } | |
755 if (mirror == NULL) { | |
756 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf); | |
757 } else { | |
758 return (jclass) JNIHandles::make_local(env, mirror); | |
759 } | |
760 JVM_END | |
761 | |
762 | |
763 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls)) | |
764 JVMWrapper("JVM_ResolveClass"); | |
765 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented"); | |
766 JVM_END | |
767 | |
878
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768 |
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769 // Returns a class loaded by the bootstrap class loader; or null |
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770 // if not found. ClassNotFoundException is not thrown. |
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771 // |
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772 // Rationale behind JVM_FindClassFromBootLoader |
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773 // a> JVM_FindClassFromClassLoader was never exported in the export tables. |
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774 // b> because of (a) java.dll has a direct dependecy on the unexported |
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775 // private symbol "_JVM_FindClassFromClassLoader@20". |
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776 // c> the launcher cannot use the private symbol as it dynamically opens |
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777 // the entry point, so if something changes, the launcher will fail |
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778 // unexpectedly at runtime, it is safest for the launcher to dlopen a |
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779 // stable exported interface. |
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780 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its |
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781 // signature to change from _JVM_FindClassFromClassLoader@20 to |
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782 // JVM_FindClassFromClassLoader and will not be backward compatible |
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783 // with older JDKs. |
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784 // Thus a public/stable exported entry point is the right solution, |
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785 // public here means public in linker semantics, and is exported only |
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786 // to the JDK, and is not intended to be a public API. |
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787 |
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788 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env, |
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789 const char* name)) |
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790 JVMWrapper2("JVM_FindClassFromBootLoader %s", name); |
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791 |
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792 // Java libraries should ensure that name is never null... |
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793 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { |
878
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794 // It's impossible to create this class; the name cannot fit |
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795 // into the constant pool. |
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796 return NULL; |
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797 } |
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798 |
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799 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); |
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800 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL); |
878
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801 if (k == NULL) { |
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|
802 return NULL; |
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|
803 } |
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804 |
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|
805 if (TraceClassResolution) { |
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806 trace_class_resolution(k); |
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807 } |
6983 | 808 return (jclass) JNIHandles::make_local(env, k->java_mirror()); |
878
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809 JVM_END |
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810 |
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811 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name, |
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812 jboolean init, jobject loader, |
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813 jboolean throwError)) |
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814 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name, |
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815 throwError ? "error" : "exception"); |
388 | 816 // Java libraries should ensure that name is never null... |
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817 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { |
388 | 818 // It's impossible to create this class; the name cannot fit |
819 // into the constant pool. | |
820 if (throwError) { | |
821 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
822 } else { | |
823 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name); | |
824 } | |
825 } | |
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826 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); |
388 | 827 Handle h_loader(THREAD, JNIHandles::resolve(loader)); |
828 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, | |
829 Handle(), throwError, THREAD); | |
830 | |
831 if (TraceClassResolution && result != NULL) { | |
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832 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); |
388 | 833 } |
834 return result; | |
0 | 835 JVM_END |
836 | |
837 | |
838 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name, | |
839 jboolean init, jclass from)) | |
840 JVMWrapper2("JVM_FindClassFromClass %s", name); | |
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841 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { |
0 | 842 // It's impossible to create this class; the name cannot fit |
843 // into the constant pool. | |
844 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
845 } | |
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846 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); |
0 | 847 oop from_class_oop = JNIHandles::resolve(from); |
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848 Klass* from_class = (from_class_oop == NULL) |
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849 ? (Klass*)NULL |
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850 : java_lang_Class::as_Klass(from_class_oop); |
0 | 851 oop class_loader = NULL; |
852 oop protection_domain = NULL; | |
853 if (from_class != NULL) { | |
6983 | 854 class_loader = from_class->class_loader(); |
855 protection_domain = from_class->protection_domain(); | |
0 | 856 } |
857 Handle h_loader(THREAD, class_loader); | |
858 Handle h_prot (THREAD, protection_domain); | |
859 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, | |
860 h_prot, true, thread); | |
861 | |
862 if (TraceClassResolution && result != NULL) { | |
863 // this function is generally only used for class loading during verification. | |
864 ResourceMark rm; | |
865 oop from_mirror = JNIHandles::resolve_non_null(from); | |
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866 Klass* from_class = java_lang_Class::as_Klass(from_mirror); |
6983 | 867 const char * from_name = from_class->external_name(); |
0 | 868 |
869 oop mirror = JNIHandles::resolve_non_null(result); | |
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870 Klass* to_class = java_lang_Class::as_Klass(mirror); |
6983 | 871 const char * to = to_class->external_name(); |
0 | 872 tty->print("RESOLVE %s %s (verification)\n", from_name, to); |
873 } | |
874 | |
875 return result; | |
876 JVM_END | |
877 | |
878 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) { | |
879 if (loader.is_null()) { | |
880 return; | |
881 } | |
882 | |
883 // check whether the current caller thread holds the lock or not. | |
884 // If not, increment the corresponding counter | |
885 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) != | |
886 ObjectSynchronizer::owner_self) { | |
887 counter->inc(); | |
888 } | |
889 } | |
890 | |
891 // common code for JVM_DefineClass() and JVM_DefineClassWithSource() | |
973
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892 // and JVM_DefineClassWithSourceCond() |
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893 static jclass jvm_define_class_common(JNIEnv *env, const char *name, |
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894 jobject loader, const jbyte *buf, |
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895 jsize len, jobject pd, const char *source, |
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896 jboolean verify, TRAPS) { |
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897 if (source == NULL) source = "__JVM_DefineClass__"; |
0 | 898 |
875
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899 assert(THREAD->is_Java_thread(), "must be a JavaThread"); |
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900 JavaThread* jt = (JavaThread*) THREAD; |
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901 |
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902 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(), |
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903 ClassLoader::perf_define_appclass_selftime(), |
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904 ClassLoader::perf_define_appclasses(), |
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905 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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906 jt->get_thread_stat()->perf_timers_addr(), |
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907 PerfClassTraceTime::DEFINE_CLASS); |
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|
908 |
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909 if (UsePerfData) { |
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910 ClassLoader::perf_app_classfile_bytes_read()->inc(len); |
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911 } |
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912 |
0 | 913 // Since exceptions can be thrown, class initialization can take place |
914 // if name is NULL no check for class name in .class stream has to be made. | |
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915 TempNewSymbol class_name = NULL; |
0 | 916 if (name != NULL) { |
917 const int str_len = (int)strlen(name); | |
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918 if (str_len > Symbol::max_length()) { |
0 | 919 // It's impossible to create this class; the name cannot fit |
920 // into the constant pool. | |
921 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
922 } | |
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923 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL); |
0 | 924 } |
925 | |
926 ResourceMark rm(THREAD); | |
927 ClassFileStream st((u1*) buf, len, (char *)source); | |
928 Handle class_loader (THREAD, JNIHandles::resolve(loader)); | |
929 if (UsePerfData) { | |
930 is_lock_held_by_thread(class_loader, | |
931 ClassLoader::sync_JVMDefineClassLockFreeCounter(), | |
932 THREAD); | |
933 } | |
934 Handle protection_domain (THREAD, JNIHandles::resolve(pd)); | |
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935 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader, |
0 | 936 protection_domain, &st, |
973
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937 verify != 0, |
0 | 938 CHECK_NULL); |
939 | |
940 if (TraceClassResolution && k != NULL) { | |
941 trace_class_resolution(k); | |
942 } | |
943 | |
6983 | 944 return (jclass) JNIHandles::make_local(env, k->java_mirror()); |
0 | 945 } |
946 | |
947 | |
948 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd)) | |
949 JVMWrapper2("JVM_DefineClass %s", name); | |
950 | |
973
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951 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD); |
0 | 952 JVM_END |
953 | |
954 | |
955 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source)) | |
956 JVMWrapper2("JVM_DefineClassWithSource %s", name); | |
957 | |
973
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958 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD); |
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959 JVM_END |
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960 |
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961 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name, |
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962 jobject loader, const jbyte *buf, |
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963 jsize len, jobject pd, |
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964 const char *source, jboolean verify)) |
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965 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name); |
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966 |
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967 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD); |
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968 JVM_END |
0 | 969 |
970 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name)) | |
971 JVMWrapper("JVM_FindLoadedClass"); | |
972 ResourceMark rm(THREAD); | |
973 | |
974 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); | |
975 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL); | |
976 | |
977 const char* str = java_lang_String::as_utf8_string(string()); | |
978 // Sanity check, don't expect null | |
979 if (str == NULL) return NULL; | |
980 | |
981 const int str_len = (int)strlen(str); | |
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982 if (str_len > Symbol::max_length()) { |
0 | 983 // It's impossible to create this class; the name cannot fit |
984 // into the constant pool. | |
985 return NULL; | |
986 } | |
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987 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL); |
0 | 988 |
989 // Security Note: | |
990 // The Java level wrapper will perform the necessary security check allowing | |
991 // us to pass the NULL as the initiating class loader. | |
992 Handle h_loader(THREAD, JNIHandles::resolve(loader)); | |
993 if (UsePerfData) { | |
994 is_lock_held_by_thread(h_loader, | |
995 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(), | |
996 THREAD); | |
997 } | |
998 | |
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999 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name, |
0 | 1000 h_loader, |
1001 Handle(), | |
1002 CHECK_NULL); | |
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1003 #if INCLUDE_CDS |
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1004 if (k == NULL) { |
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1005 // If the class is not already loaded, try to see if it's in the shared |
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1006 // archive for the current classloader (h_loader). |
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1007 instanceKlassHandle ik = SystemDictionaryShared::find_or_load_shared_class( |
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1008 klass_name, h_loader, CHECK_NULL); |
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1009 k = ik(); |
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1010 } |
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1011 #endif |
0 | 1012 return (k == NULL) ? NULL : |
6983 | 1013 (jclass) JNIHandles::make_local(env, k->java_mirror()); |
0 | 1014 JVM_END |
1015 | |
1016 | |
1017 // Reflection support ////////////////////////////////////////////////////////////////////////////// | |
1018 | |
1019 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls)) | |
1020 assert (cls != NULL, "illegal class"); | |
1021 JVMWrapper("JVM_GetClassName"); | |
1022 JvmtiVMObjectAllocEventCollector oam; | |
1023 ResourceMark rm(THREAD); | |
1024 const char* name; | |
1025 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
1026 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls))); | |
1027 } else { | |
1028 // Consider caching interned string in Klass | |
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1029 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); |
0 | 1030 assert(k->is_klass(), "just checking"); |
6983 | 1031 name = k->external_name(); |
0 | 1032 } |
1033 oop result = StringTable::intern((char*) name, CHECK_NULL); | |
1034 return (jstring) JNIHandles::make_local(env, result); | |
1035 JVM_END | |
1036 | |
1037 | |
1038 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls)) | |
1039 JVMWrapper("JVM_GetClassInterfaces"); | |
1040 JvmtiVMObjectAllocEventCollector oam; | |
1041 oop mirror = JNIHandles::resolve_non_null(cls); | |
1042 | |
1043 // Special handling for primitive objects | |
1044 if (java_lang_Class::is_primitive(mirror)) { | |
1045 // Primitive objects does not have any interfaces | |
1142 | 1046 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); |
0 | 1047 return (jobjectArray) JNIHandles::make_local(env, r); |
1048 } | |
1049 | |
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1050 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror)); |
0 | 1051 // Figure size of result array |
1052 int size; | |
1053 if (klass->oop_is_instance()) { | |
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1054 size = InstanceKlass::cast(klass())->local_interfaces()->length(); |
0 | 1055 } else { |
1056 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass"); | |
1057 size = 2; | |
1058 } | |
1059 | |
1060 // Allocate result array | |
1142 | 1061 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL); |
0 | 1062 objArrayHandle result (THREAD, r); |
1063 // Fill in result | |
1064 if (klass->oop_is_instance()) { | |
1065 // Regular instance klass, fill in all local interfaces | |
1066 for (int index = 0; index < size; index++) { | |
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1067 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index); |
6983 | 1068 result->obj_at_put(index, k->java_mirror()); |
0 | 1069 } |
1070 } else { | |
1071 // All arrays implement java.lang.Cloneable and java.io.Serializable | |
6983 | 1072 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror()); |
1073 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror()); | |
0 | 1074 } |
1075 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1076 JVM_END | |
1077 | |
1078 | |
1079 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls)) | |
1080 JVMWrapper("JVM_GetClassLoader"); | |
1081 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1082 return NULL; | |
1083 } | |
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1084 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
6983 | 1085 oop loader = k->class_loader(); |
0 | 1086 return JNIHandles::make_local(env, loader); |
1087 JVM_END | |
1088 | |
1089 | |
1090 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls)) | |
1091 JVMWrapper("JVM_IsInterface"); | |
1092 oop mirror = JNIHandles::resolve_non_null(cls); | |
1093 if (java_lang_Class::is_primitive(mirror)) { | |
1094 return JNI_FALSE; | |
1095 } | |
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1096 Klass* k = java_lang_Class::as_Klass(mirror); |
6983 | 1097 jboolean result = k->is_interface(); |
1098 assert(!result || k->oop_is_instance(), | |
0 | 1099 "all interfaces are instance types"); |
1100 // The compiler intrinsic for isInterface tests the | |
1101 // Klass::_access_flags bits in the same way. | |
1102 return result; | |
1103 JVM_END | |
1104 | |
1105 | |
1106 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls)) | |
1107 JVMWrapper("JVM_GetClassSigners"); | |
1108 JvmtiVMObjectAllocEventCollector oam; | |
1109 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1110 // There are no signers for primitive types | |
1111 return NULL; | |
1112 } | |
1113 | |
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1114 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls)); |
0 | 1115 |
1116 // If there are no signers set in the class, or if the class | |
1117 // is an array, return NULL. | |
1118 if (signers == NULL) return NULL; | |
1119 | |
1120 // copy of the signers array | |
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1121 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass(); |
0 | 1122 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL); |
1123 for (int index = 0; index < signers->length(); index++) { | |
1124 signers_copy->obj_at_put(index, signers->obj_at(index)); | |
1125 } | |
1126 | |
1127 // return the copy | |
1128 return (jobjectArray) JNIHandles::make_local(env, signers_copy); | |
1129 JVM_END | |
1130 | |
1131 | |
1132 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers)) | |
1133 JVMWrapper("JVM_SetClassSigners"); | |
1134 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1135 // This call is ignored for primitive types and arrays. | |
1136 // Signers are only set once, ClassLoader.java, and thus shouldn't | |
1137 // be called with an array. Only the bootstrap loader creates arrays. | |
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1138 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
6983 | 1139 if (k->oop_is_instance()) { |
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1140 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers))); |
0 | 1141 } |
1142 } | |
1143 JVM_END | |
1144 | |
1145 | |
1146 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls)) | |
1147 JVMWrapper("JVM_GetProtectionDomain"); | |
1148 if (JNIHandles::resolve(cls) == NULL) { | |
1149 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); | |
1150 } | |
1151 | |
1152 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
1153 // Primitive types does not have a protection domain. | |
1154 return NULL; | |
1155 } | |
1156 | |
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1157 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls)); |
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1158 return (jobject) JNIHandles::make_local(env, pd); |
0 | 1159 JVM_END |
1160 | |
1161 | |
11010 | 1162 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) { |
1163 // If there is a security manager and protection domain, check the access | |
1164 // in the protection domain, otherwise it is authorized. | |
1165 if (java_lang_System::has_security_manager()) { | |
1166 | |
1167 // For bootstrapping, if pd implies method isn't in the JDK, allow | |
1168 // this context to revert to older behavior. | |
1169 // In this case the isAuthorized field in AccessControlContext is also not | |
1170 // present. | |
1171 if (Universe::protection_domain_implies_method() == NULL) { | |
1172 return true; | |
1173 } | |
1174 | |
1175 // Whitelist certain access control contexts | |
1176 if (java_security_AccessControlContext::is_authorized(context)) { | |
1177 return true; | |
1178 } | |
1179 | |
1180 oop prot = klass->protection_domain(); | |
1181 if (prot != NULL) { | |
1182 // Call pd.implies(new SecurityPermission("createAccessControlContext")) | |
1183 // in the new wrapper. | |
1184 methodHandle m(THREAD, Universe::protection_domain_implies_method()); | |
1185 Handle h_prot(THREAD, prot); | |
1186 JavaValue result(T_BOOLEAN); | |
1187 JavaCallArguments args(h_prot); | |
1188 JavaCalls::call(&result, m, &args, CHECK_false); | |
1189 return (result.get_jboolean() != 0); | |
1190 } | |
1191 } | |
1192 return true; | |
1193 } | |
1194 | |
1195 // Create an AccessControlContext with a protection domain with null codesource | |
1196 // and null permissions - which gives no permissions. | |
1197 oop create_dummy_access_control_context(TRAPS) { | |
1198 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass()); | |
1199 // new ProtectionDomain(null,null); | |
1200 oop null_protection_domain = pd_klass->allocate_instance(CHECK_NULL); | |
1201 Handle null_pd(THREAD, null_protection_domain); | |
1202 | |
1203 // new ProtectionDomain[] {pd}; | |
1204 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL); | |
1205 context->obj_at_put(0, null_pd()); | |
1206 | |
1207 // new AccessControlContext(new ProtectionDomain[] {pd}) | |
1208 objArrayHandle h_context(THREAD, context); | |
1209 oop result = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL); | |
1210 return result; | |
1211 } | |
0 | 1212 |
1213 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException)) | |
1214 JVMWrapper("JVM_DoPrivileged"); | |
1215 | |
1216 if (action == NULL) { | |
1217 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action"); | |
1218 } | |
1219 | |
11010 | 1220 // Compute the frame initiating the do privileged operation and setup the privileged stack |
1221 vframeStream vfst(thread); | |
1222 vfst.security_get_caller_frame(1); | |
1223 | |
1224 if (vfst.at_end()) { | |
1225 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?"); | |
1226 } | |
1227 | |
1228 Method* method = vfst.method(); | |
1229 instanceKlassHandle klass (THREAD, method->method_holder()); | |
1230 | |
1231 // Check that action object understands "Object run()" | |
1232 Handle h_context; | |
1233 if (context != NULL) { | |
1234 h_context = Handle(THREAD, JNIHandles::resolve(context)); | |
1235 bool authorized = is_authorized(h_context, klass, CHECK_NULL); | |
1236 if (!authorized) { | |
1237 // Create an unprivileged access control object and call it's run function | |
1238 // instead. | |
1239 oop noprivs = create_dummy_access_control_context(CHECK_NULL); | |
1240 h_context = Handle(THREAD, noprivs); | |
1241 } | |
1242 } | |
0 | 1243 |
1244 // Check that action object understands "Object run()" | |
1245 Handle object (THREAD, JNIHandles::resolve(action)); | |
1246 | |
1247 // get run() method | |
6983 | 1248 Method* m_oop = object->klass()->uncached_lookup_method( |
0 | 1249 vmSymbols::run_method_name(), |
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1250 vmSymbols::void_object_signature(), |
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1251 Klass::normal); |
0 | 1252 methodHandle m (THREAD, m_oop); |
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1253 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) { |
0 | 1254 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method"); |
1255 } | |
1256 | |
11010 | 1257 // Stack allocated list of privileged stack elements |
1258 PrivilegedElement pi; | |
0 | 1259 if (!vfst.at_end()) { |
11010 | 1260 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL); |
0 | 1261 thread->set_privileged_stack_top(&pi); |
1262 } | |
1263 | |
1264 | |
1265 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type | |
1266 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction | |
1267 Handle pending_exception; | |
1268 JavaValue result(T_OBJECT); | |
1269 JavaCallArguments args(object); | |
1270 JavaCalls::call(&result, m, &args, THREAD); | |
1271 | |
1272 // done with action, remove ourselves from the list | |
1273 if (!vfst.at_end()) { | |
1274 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element"); | |
1275 thread->set_privileged_stack_top(thread->privileged_stack_top()->next()); | |
1276 } | |
1277 | |
1278 if (HAS_PENDING_EXCEPTION) { | |
1279 pending_exception = Handle(THREAD, PENDING_EXCEPTION); | |
1280 CLEAR_PENDING_EXCEPTION; | |
1281 | |
1142 | 1282 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) && |
1283 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) { | |
0 | 1284 // Throw a java.security.PrivilegedActionException(Exception e) exception |
1285 JavaCallArguments args(pending_exception); | |
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1286 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(), |
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1287 vmSymbols::exception_void_signature(), |
0 | 1288 &args); |
1289 } | |
1290 } | |
1291 | |
1292 if (pending_exception.not_null()) THROW_OOP_0(pending_exception()); | |
1293 return JNIHandles::make_local(env, (oop) result.get_jobject()); | |
1294 JVM_END | |
1295 | |
1296 | |
1297 // Returns the inherited_access_control_context field of the running thread. | |
1298 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls)) | |
1299 JVMWrapper("JVM_GetInheritedAccessControlContext"); | |
1300 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj()); | |
1301 return JNIHandles::make_local(env, result); | |
1302 JVM_END | |
1303 | |
1304 class RegisterArrayForGC { | |
1305 private: | |
1306 JavaThread *_thread; | |
1307 public: | |
1308 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) { | |
1309 _thread = thread; | |
1310 _thread->register_array_for_gc(array); | |
1311 } | |
1312 | |
1313 ~RegisterArrayForGC() { | |
1314 _thread->register_array_for_gc(NULL); | |
1315 } | |
1316 }; | |
1317 | |
1318 | |
1319 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls)) | |
1320 JVMWrapper("JVM_GetStackAccessControlContext"); | |
1321 if (!UsePrivilegedStack) return NULL; | |
1322 | |
1323 ResourceMark rm(THREAD); | |
1324 GrowableArray<oop>* local_array = new GrowableArray<oop>(12); | |
1325 JvmtiVMObjectAllocEventCollector oam; | |
1326 | |
1327 // count the protection domains on the execution stack. We collapse | |
1328 // duplicate consecutive protection domains into a single one, as | |
1329 // well as stopping when we hit a privileged frame. | |
1330 | |
1331 // Use vframeStream to iterate through Java frames | |
1332 vframeStream vfst(thread); | |
1333 | |
1334 oop previous_protection_domain = NULL; | |
1335 Handle privileged_context(thread, NULL); | |
1336 bool is_privileged = false; | |
1337 oop protection_domain = NULL; | |
1338 | |
1339 for(; !vfst.at_end(); vfst.next()) { | |
1340 // get method of frame | |
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1341 Method* method = vfst.method(); |
0 | 1342 intptr_t* frame_id = vfst.frame_id(); |
1343 | |
1344 // check the privileged frames to see if we have a match | |
1345 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) { | |
1346 // this frame is privileged | |
1347 is_privileged = true; | |
1348 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context()); | |
1349 protection_domain = thread->privileged_stack_top()->protection_domain(); | |
1350 } else { | |
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1351 protection_domain = method->method_holder()->protection_domain(); |
0 | 1352 } |
1353 | |
1354 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) { | |
1355 local_array->push(protection_domain); | |
1356 previous_protection_domain = protection_domain; | |
1357 } | |
1358 | |
1359 if (is_privileged) break; | |
1360 } | |
1361 | |
1362 | |
1363 // either all the domains on the stack were system domains, or | |
1364 // we had a privileged system domain | |
1365 if (local_array->is_empty()) { | |
1366 if (is_privileged && privileged_context.is_null()) return NULL; | |
1367 | |
1368 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL); | |
1369 return JNIHandles::make_local(env, result); | |
1370 } | |
1371 | |
1372 // the resource area must be registered in case of a gc | |
1373 RegisterArrayForGC ragc(thread, local_array); | |
1142 | 1374 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(), |
0 | 1375 local_array->length(), CHECK_NULL); |
1376 objArrayHandle h_context(thread, context); | |
1377 for (int index = 0; index < local_array->length(); index++) { | |
1378 h_context->obj_at_put(index, local_array->at(index)); | |
1379 } | |
1380 | |
1381 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL); | |
1382 | |
1383 return JNIHandles::make_local(env, result); | |
1384 JVM_END | |
1385 | |
1386 | |
1387 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls)) | |
1388 JVMWrapper("JVM_IsArrayClass"); | |
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1389 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
6983 | 1390 return (k != NULL) && k->oop_is_array() ? true : false; |
0 | 1391 JVM_END |
1392 | |
1393 | |
1394 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls)) | |
1395 JVMWrapper("JVM_IsPrimitiveClass"); | |
1396 oop mirror = JNIHandles::resolve_non_null(cls); | |
1397 return (jboolean) java_lang_Class::is_primitive(mirror); | |
1398 JVM_END | |
1399 | |
1400 | |
1401 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls)) | |
1402 JVMWrapper("JVM_GetComponentType"); | |
1403 oop mirror = JNIHandles::resolve_non_null(cls); | |
1404 oop result = Reflection::array_component_type(mirror, CHECK_NULL); | |
1405 return (jclass) JNIHandles::make_local(env, result); | |
1406 JVM_END | |
1407 | |
1408 | |
1409 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls)) | |
1410 JVMWrapper("JVM_GetClassModifiers"); | |
1411 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1412 // Primitive type | |
1413 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; | |
1414 } | |
1415 | |
6983 | 1416 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 1417 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0)); |
1418 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK"); | |
1419 return k->modifier_flags(); | |
1420 JVM_END | |
1421 | |
1422 | |
1423 // Inner class reflection /////////////////////////////////////////////////////////////////////////////// | |
1424 | |
1425 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass)) | |
1426 JvmtiVMObjectAllocEventCollector oam; | |
1427 // ofClass is a reference to a java_lang_Class object. The mirror object | |
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1428 // of an InstanceKlass |
0 | 1429 |
1430 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || | |
6983 | 1431 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) { |
1142 | 1432 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); |
0 | 1433 return (jobjectArray)JNIHandles::make_local(env, result); |
1434 } | |
1435 | |
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1436 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); |
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1437 InnerClassesIterator iter(k); |
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1438 |
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1439 if (iter.length() == 0) { |
0 | 1440 // Neither an inner nor outer class |
1142 | 1441 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); |
0 | 1442 return (jobjectArray)JNIHandles::make_local(env, result); |
1443 } | |
1444 | |
1445 // find inner class info | |
1446 constantPoolHandle cp(thread, k->constants()); | |
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1447 int length = iter.length(); |
0 | 1448 |
1449 // Allocate temp. result array | |
1142 | 1450 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL); |
0 | 1451 objArrayHandle result (THREAD, r); |
1452 int members = 0; | |
1453 | |
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1454 for (; !iter.done(); iter.next()) { |
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1455 int ioff = iter.inner_class_info_index(); |
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1456 int ooff = iter.outer_class_info_index(); |
0 | 1457 |
1458 if (ioff != 0 && ooff != 0) { | |
1459 // Check to see if the name matches the class we're looking for | |
1460 // before attempting to find the class. | |
1461 if (cp->klass_name_at_matches(k, ooff)) { | |
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1462 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL); |
0 | 1463 if (outer_klass == k()) { |
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1464 Klass* ik = cp->klass_at(ioff, CHECK_NULL); |
0 | 1465 instanceKlassHandle inner_klass (THREAD, ik); |
1466 | |
1467 // Throws an exception if outer klass has not declared k as | |
1468 // an inner klass | |
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1469 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL); |
0 | 1470 |
1471 result->obj_at_put(members, inner_klass->java_mirror()); | |
1472 members++; | |
1473 } | |
1474 } | |
1475 } | |
1476 } | |
1477 | |
1478 if (members != length) { | |
1479 // Return array of right length | |
1142 | 1480 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL); |
0 | 1481 for(int i = 0; i < members; i++) { |
1482 res->obj_at_put(i, result->obj_at(i)); | |
1483 } | |
1484 return (jobjectArray)JNIHandles::make_local(env, res); | |
1485 } | |
1486 | |
1487 return (jobjectArray)JNIHandles::make_local(env, result()); | |
1488 JVM_END | |
1489 | |
1490 | |
1491 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass)) | |
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1492 { |
0 | 1493 // ofClass is a reference to a java_lang_Class object. |
1494 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || | |
6983 | 1495 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) { |
0 | 1496 return NULL; |
1497 } | |
1498 | |
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1499 bool inner_is_member = false; |
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1500 Klass* outer_klass |
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1501 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)) |
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1502 )->compute_enclosing_class(&inner_is_member, CHECK_NULL); |
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1503 if (outer_klass == NULL) return NULL; // already a top-level class |
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1504 if (!inner_is_member) return NULL; // an anonymous class (inside a method) |
6983 | 1505 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror()); |
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1506 } |
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1507 JVM_END |
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1508 |
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1509 // should be in InstanceKlass.cpp, but is here for historical reasons |
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1510 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k, |
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1511 bool* inner_is_member, |
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1512 TRAPS) { |
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1513 Thread* thread = THREAD; |
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1514 InnerClassesIterator iter(k); |
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1515 if (iter.length() == 0) { |
0 | 1516 // No inner class info => no declaring class |
1517 return NULL; | |
1518 } | |
1519 | |
1520 constantPoolHandle i_cp(thread, k->constants()); | |
1521 | |
1522 bool found = false; | |
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1523 Klass* ok; |
0 | 1524 instanceKlassHandle outer_klass; |
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1525 *inner_is_member = false; |
0 | 1526 |
1527 // Find inner_klass attribute | |
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1528 for (; !iter.done() && !found; iter.next()) { |
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1529 int ioff = iter.inner_class_info_index(); |
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1530 int ooff = iter.outer_class_info_index(); |
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1531 int noff = iter.inner_name_index(); |
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1532 if (ioff != 0) { |
0 | 1533 // Check to see if the name matches the class we're looking for |
1534 // before attempting to find the class. | |
1535 if (i_cp->klass_name_at_matches(k, ioff)) { | |
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1536 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL); |
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1537 found = (k() == inner_klass); |
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1538 if (found && ooff != 0) { |
0 | 1539 ok = i_cp->klass_at(ooff, CHECK_NULL); |
1540 outer_klass = instanceKlassHandle(thread, ok); | |
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1541 *inner_is_member = true; |
0 | 1542 } |
1543 } | |
1544 } | |
1545 } | |
1546 | |
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1547 if (found && outer_klass.is_null()) { |
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1548 // It may be anonymous; try for that. |
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1549 int encl_method_class_idx = k->enclosing_method_class_index(); |
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1550 if (encl_method_class_idx != 0) { |
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1551 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL); |
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1552 outer_klass = instanceKlassHandle(thread, ok); |
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1553 *inner_is_member = false; |
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1554 } |
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1555 } |
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1556 |
0 | 1557 // If no inner class attribute found for this class. |
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1558 if (outer_klass.is_null()) return NULL; |
0 | 1559 |
1560 // Throws an exception if outer klass has not declared k as an inner klass | |
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1561 // We need evidence that each klass knows about the other, or else |
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1562 // the system could allow a spoof of an inner class to gain access rights. |
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1563 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL); |
665
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1564 return outer_klass(); |
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1565 } |
0 | 1566 |
1567 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls)) | |
1568 assert (cls != NULL, "illegal class"); | |
1569 JVMWrapper("JVM_GetClassSignature"); | |
1570 JvmtiVMObjectAllocEventCollector oam; | |
1571 ResourceMark rm(THREAD); | |
1572 // Return null for arrays and primatives | |
1573 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
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1574 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); |
6983 | 1575 if (k->oop_is_instance()) { |
6725
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1576 Symbol* sym = InstanceKlass::cast(k)->generic_signature(); |
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diff
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|
1577 if (sym == NULL) return NULL; |
0 | 1578 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); |
1579 return (jstring) JNIHandles::make_local(env, str()); | |
1580 } | |
1581 } | |
1582 return NULL; | |
1583 JVM_END | |
1584 | |
1585 | |
1586 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls)) | |
1587 assert (cls != NULL, "illegal class"); | |
1588 JVMWrapper("JVM_GetClassAnnotations"); | |
8818
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1589 |
0 | 1590 // Return null for arrays and primitives |
1591 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
6725
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1592 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); |
6983 | 1593 if (k->oop_is_instance()) { |
6725
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1594 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL); |
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1595 return (jbyteArray) JNIHandles::make_local(env, a); |
0 | 1596 } |
1597 } | |
1598 return NULL; | |
1599 JVM_END | |
1600 | |
1601 | |
8818
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1602 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) { |
0 | 1603 // some of this code was adapted from from jni_FromReflectedField |
1604 | |
1605 oop reflected = JNIHandles::resolve_non_null(field); | |
1606 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
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1607 Klass* k = java_lang_Class::as_Klass(mirror); |
0 | 1608 int slot = java_lang_reflect_Field::slot(reflected); |
1609 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
1610 | |
1611 KlassHandle kh(THREAD, k); | |
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1612 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot); |
0 | 1613 |
1614 if (modifiers & JVM_ACC_STATIC) { | |
1615 // for static fields we only look in the current class | |
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1616 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) { |
0 | 1617 assert(false, "cannot find static field"); |
8818
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|
1618 return false; |
0 | 1619 } |
1620 } else { | |
1621 // for instance fields we start with the current class and work | |
1622 // our way up through the superclass chain | |
6725
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1623 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) { |
0 | 1624 assert(false, "cannot find instance field"); |
8818
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1625 return false; |
0 | 1626 } |
1627 } | |
8818
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|
1628 return true; |
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|
1629 } |
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|
1630 |
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|
1631 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field)) |
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|
1632 // field is a handle to a java.lang.reflect.Field object |
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|
1633 assert(field != NULL, "illegal field"); |
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|
1634 JVMWrapper("JVM_GetFieldAnnotations"); |
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|
1635 |
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|
1636 fieldDescriptor fd; |
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|
1637 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL); |
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|
1638 if (!gotFd) { |
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|
1639 return NULL; |
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|
1640 } |
0 | 1641 |
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|
1642 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD)); |
0 | 1643 JVM_END |
1644 | |
1645 | |
7462
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|
1646 static Method* jvm_get_method_common(jobject method) { |
0 | 1647 // some of this code was adapted from from jni_FromReflectedMethod |
1648 | |
1649 oop reflected = JNIHandles::resolve_non_null(method); | |
1650 oop mirror = NULL; | |
1651 int slot = 0; | |
1652 | |
1142 | 1653 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { |
0 | 1654 mirror = java_lang_reflect_Constructor::clazz(reflected); |
1655 slot = java_lang_reflect_Constructor::slot(reflected); | |
1656 } else { | |
1142 | 1657 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), |
0 | 1658 "wrong type"); |
1659 mirror = java_lang_reflect_Method::clazz(reflected); | |
1660 slot = java_lang_reflect_Method::slot(reflected); | |
1661 } | |
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1662 Klass* k = java_lang_Class::as_Klass(mirror); |
0 | 1663 |
7462
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|
1664 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot); |
8818
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|
1665 assert(m != NULL, "cannot find method"); |
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|
1666 return m; // caller has to deal with NULL in product mode |
0 | 1667 } |
1668 | |
1669 | |
1670 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method)) | |
1671 JVMWrapper("JVM_GetMethodAnnotations"); | |
1672 | |
1673 // method is a handle to a java.lang.reflect.Method object | |
7462
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|
1674 Method* m = jvm_get_method_common(method); |
8818
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|
1675 if (m == NULL) { |
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|
1676 return NULL; |
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|
1677 } |
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|
1678 |
6725
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|
1679 return (jbyteArray) JNIHandles::make_local(env, |
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|
1680 Annotations::make_java_array(m->annotations(), THREAD)); |
0 | 1681 JVM_END |
1682 | |
1683 | |
1684 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method)) | |
1685 JVMWrapper("JVM_GetMethodDefaultAnnotationValue"); | |
1686 | |
1687 // method is a handle to a java.lang.reflect.Method object | |
7462
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|
1688 Method* m = jvm_get_method_common(method); |
8818
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|
1689 if (m == NULL) { |
1916ca1dec2f
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|
1690 return NULL; |
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|
1691 } |
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|
1692 |
6725
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|
1693 return (jbyteArray) JNIHandles::make_local(env, |
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|
1694 Annotations::make_java_array(m->annotation_default(), THREAD)); |
0 | 1695 JVM_END |
1696 | |
1697 | |
1698 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method)) | |
1699 JVMWrapper("JVM_GetMethodParameterAnnotations"); | |
1700 | |
1701 // method is a handle to a java.lang.reflect.Method object | |
7462
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|
1702 Method* m = jvm_get_method_common(method); |
8818
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|
1703 if (m == NULL) { |
1916ca1dec2f
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|
1704 return NULL; |
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|
1705 } |
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|
1706 |
6725
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|
1707 return (jbyteArray) JNIHandles::make_local(env, |
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|
1708 Annotations::make_java_array(m->parameter_annotations(), THREAD)); |
0 | 1709 JVM_END |
1710 | |
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|
1711 /* Type use annotations support (JDK 1.8) */ |
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|
1712 |
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|
1713 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls)) |
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|
1714 assert (cls != NULL, "illegal class"); |
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|
1715 JVMWrapper("JVM_GetClassTypeAnnotations"); |
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|
1716 ResourceMark rm(THREAD); |
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|
1717 // Return null for arrays and primitives |
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|
1718 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { |
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|
1719 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); |
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|
1720 if (k->oop_is_instance()) { |
8031 | 1721 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations(); |
7611
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|
1722 if (type_annotations != NULL) { |
8031 | 1723 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); |
7611
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|
1724 return (jbyteArray) JNIHandles::make_local(env, a); |
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|
1725 } |
7457
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|
1726 } |
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|
1727 } |
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|
1728 return NULL; |
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|
1729 JVM_END |
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|
1730 |
8818
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|
1731 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method)) |
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|
1732 assert (method != NULL, "illegal method"); |
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changeset
|
1733 JVMWrapper("JVM_GetMethodTypeAnnotations"); |
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|
1734 |
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|
1735 // method is a handle to a java.lang.reflect.Method object |
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changeset
|
1736 Method* m = jvm_get_method_common(method); |
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|
1737 if (m == NULL) { |
1916ca1dec2f
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|
1738 return NULL; |
1916ca1dec2f
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|
1739 } |
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|
1740 |
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|
1741 AnnotationArray* type_annotations = m->type_annotations(); |
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|
1742 if (type_annotations != NULL) { |
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|
1743 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); |
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|
1744 return (jbyteArray) JNIHandles::make_local(env, a); |
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|
1745 } |
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|
1746 |
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|
1747 return NULL; |
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|
1748 JVM_END |
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|
1749 |
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|
1750 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field)) |
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changeset
|
1751 assert (field != NULL, "illegal field"); |
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changeset
|
1752 JVMWrapper("JVM_GetFieldTypeAnnotations"); |
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|
1753 |
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|
1754 fieldDescriptor fd; |
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1755 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL); |
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1756 if (!gotFd) { |
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1757 return NULL; |
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1758 } |
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1759 |
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1760 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD)); |
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1761 JVM_END |
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1762 |
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1763 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { |
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1764 if (!cp->is_within_bounds(index)) { |
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1765 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); |
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1766 } |
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1767 } |
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1768 |
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1769 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method)) |
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1770 { |
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1771 JVMWrapper("JVM_GetMethodParameters"); |
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1772 // method is a handle to a java.lang.reflect.Method object |
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1773 Method* method_ptr = jvm_get_method_common(method); |
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1774 methodHandle mh (THREAD, method_ptr); |
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1775 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method)); |
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1776 const int num_params = mh->method_parameters_length(); |
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1777 |
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1778 if (0 != num_params) { |
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1779 // make sure all the symbols are properly formatted |
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1780 for (int i = 0; i < num_params; i++) { |
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1781 MethodParametersElement* params = mh->method_parameters_start(); |
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1782 int index = params[i].name_cp_index; |
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1783 bounds_check(mh->constants(), index, CHECK_NULL); |
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1784 |
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1785 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) { |
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1786 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), |
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1787 "Wrong type at constant pool index"); |
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1788 } |
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1789 |
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1790 } |
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1791 |
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1792 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL); |
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1793 objArrayHandle result (THREAD, result_oop); |
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1794 |
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1795 for (int i = 0; i < num_params; i++) { |
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1796 MethodParametersElement* params = mh->method_parameters_start(); |
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1797 // For a 0 index, give a NULL symbol |
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1798 Symbol* sym = 0 != params[i].name_cp_index ? |
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1799 mh->constants()->symbol_at(params[i].name_cp_index) : NULL; |
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1800 int flags = params[i].flags; |
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1801 oop param = Reflection::new_parameter(reflected_method, i, sym, |
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1802 flags, CHECK_NULL); |
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1803 result->obj_at_put(i, param); |
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1804 } |
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1805 return (jobjectArray)JNIHandles::make_local(env, result()); |
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1806 } else { |
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1807 return (jobjectArray)NULL; |
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1808 } |
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1809 } |
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1810 JVM_END |
0 | 1811 |
1812 // New (JDK 1.4) reflection implementation ///////////////////////////////////// | |
1813 | |
1814 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly)) | |
1815 { | |
1816 JVMWrapper("JVM_GetClassDeclaredFields"); | |
1817 JvmtiVMObjectAllocEventCollector oam; | |
1818 | |
1819 // Exclude primitive types and array types | |
1820 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || | |
6983 | 1821 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { |
0 | 1822 // Return empty array |
1142 | 1823 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL); |
0 | 1824 return (jobjectArray) JNIHandles::make_local(env, res); |
1825 } | |
1826 | |
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1827 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); |
0 | 1828 constantPoolHandle cp(THREAD, k->constants()); |
1829 | |
1830 // Ensure class is linked | |
1831 k->link_class(CHECK_NULL); | |
1832 | |
1833 // 4496456 We need to filter out java.lang.Throwable.backtrace | |
1834 bool skip_backtrace = false; | |
1835 | |
1836 // Allocate result | |
1837 int num_fields; | |
1838 | |
1839 if (publicOnly) { | |
1840 num_fields = 0; | |
3938 | 1841 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) { |
1842 if (fs.access_flags().is_public()) ++num_fields; | |
0 | 1843 } |
1844 } else { | |
3938 | 1845 num_fields = k->java_fields_count(); |
0 | 1846 |
1142 | 1847 if (k() == SystemDictionary::Throwable_klass()) { |
0 | 1848 num_fields--; |
1849 skip_backtrace = true; | |
1850 } | |
1851 } | |
1852 | |
1142 | 1853 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL); |
0 | 1854 objArrayHandle result (THREAD, r); |
1855 | |
1856 int out_idx = 0; | |
1857 fieldDescriptor fd; | |
3938 | 1858 for (JavaFieldStream fs(k); !fs.done(); fs.next()) { |
0 | 1859 if (skip_backtrace) { |
1860 // 4496456 skip java.lang.Throwable.backtrace | |
3938 | 1861 int offset = fs.offset(); |
0 | 1862 if (offset == java_lang_Throwable::get_backtrace_offset()) continue; |
1863 } | |
1864 | |
3938 | 1865 if (!publicOnly || fs.access_flags().is_public()) { |
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1866 fd.reinitialize(k(), fs.index()); |
0 | 1867 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); |
1868 result->obj_at_put(out_idx, field); | |
1869 ++out_idx; | |
1870 } | |
1871 } | |
1872 assert(out_idx == num_fields, "just checking"); | |
1873 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1874 } | |
1875 JVM_END | |
1876 | |
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1877 static bool select_method(methodHandle method, bool want_constructor) { |
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1878 if (want_constructor) { |
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1879 return (method->is_initializer() && !method->is_static()); |
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1880 } else { |
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1881 return (!method->is_initializer() && !method->is_overpass()); |
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1882 } |
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1883 } |
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1884 |
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1885 static jobjectArray get_class_declared_methods_helper( |
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1886 JNIEnv *env, |
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1887 jclass ofClass, jboolean publicOnly, |
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1888 bool want_constructor, |
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1889 Klass* klass, TRAPS) { |
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1890 |
0 | 1891 JvmtiVMObjectAllocEventCollector oam; |
1892 | |
1893 // Exclude primitive types and array types | |
1894 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) | |
6983 | 1895 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { |
0 | 1896 // Return empty array |
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1897 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL); |
0 | 1898 return (jobjectArray) JNIHandles::make_local(env, res); |
1899 } | |
1900 | |
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1901 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); |
0 | 1902 |
1903 // Ensure class is linked | |
1904 k->link_class(CHECK_NULL); | |
1905 | |
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1906 Array<Method*>* methods = k->methods(); |
0 | 1907 int methods_length = methods->length(); |
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1908 |
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1909 // Save original method_idnum in case of redefinition, which can change |
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1910 // the idnum of obsolete methods. The new method will have the same idnum |
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1911 // but if we refresh the methods array, the counts will be wrong. |
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1912 ResourceMark rm(THREAD); |
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1913 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length); |
0 | 1914 int num_methods = 0; |
1915 | |
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1916 for (int i = 0; i < methods_length; i++) { |
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1917 methodHandle method(THREAD, methods->at(i)); |
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1918 if (select_method(method, want_constructor)) { |
0 | 1919 if (!publicOnly || method->is_public()) { |
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1920 idnums->push(method->method_idnum()); |
0 | 1921 ++num_methods; |
1922 } | |
1923 } | |
1924 } | |
1925 | |
1926 // Allocate result | |
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1927 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL); |
0 | 1928 objArrayHandle result (THREAD, r); |
1929 | |
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1930 // Now just put the methods that we selected above, but go by their idnum |
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1931 // in case of redefinition. The methods can be redefined at any safepoint, |
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1932 // so above when allocating the oop array and below when creating reflect |
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1933 // objects. |
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1934 for (int i = 0; i < num_methods; i++) { |
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1935 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i))); |
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1936 if (method.is_null()) { |
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1937 // Method may have been deleted and seems this API can handle null |
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1938 // Otherwise should probably put a method that throws NSME |
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1939 result->obj_at_put(i, NULL); |
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1940 } else { |
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1941 oop m; |
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1942 if (want_constructor) { |
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1943 m = Reflection::new_constructor(method, CHECK_NULL); |
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1944 } else { |
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1945 m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); |
0 | 1946 } |
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1947 result->obj_at_put(i, m); |
0 | 1948 } |
1949 } | |
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1950 |
0 | 1951 return (jobjectArray) JNIHandles::make_local(env, result()); |
1952 } | |
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1953 |
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1954 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) |
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1955 { |
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1956 JVMWrapper("JVM_GetClassDeclaredMethods"); |
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1957 return get_class_declared_methods_helper(env, ofClass, publicOnly, |
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1958 /*want_constructor*/ false, |
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1959 SystemDictionary::reflect_Method_klass(), THREAD); |
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1960 } |
0 | 1961 JVM_END |
1962 | |
1963 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) | |
1964 { | |
1965 JVMWrapper("JVM_GetClassDeclaredConstructors"); | |
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1966 return get_class_declared_methods_helper(env, ofClass, publicOnly, |
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1967 /*want_constructor*/ true, |
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1968 SystemDictionary::reflect_Constructor_klass(), THREAD); |
0 | 1969 } |
1970 JVM_END | |
1971 | |
1972 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls)) | |
1973 { | |
1974 JVMWrapper("JVM_GetClassAccessFlags"); | |
1975 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1976 // Primitive type | |
1977 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; | |
1978 } | |
1979 | |
6983 | 1980 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 1981 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS; |
1982 } | |
1983 JVM_END | |
1984 | |
1985 | |
1986 // Constant pool access ////////////////////////////////////////////////////////// | |
1987 | |
1988 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls)) | |
1989 { | |
1990 JVMWrapper("JVM_GetClassConstantPool"); | |
1991 JvmtiVMObjectAllocEventCollector oam; | |
1992 | |
1993 // Return null for primitives and arrays | |
1994 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
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1995 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
6983 | 1996 if (k->oop_is_instance()) { |
0 | 1997 instanceKlassHandle k_h(THREAD, k); |
1998 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL); | |
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1999 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants()); |
0 | 2000 return JNIHandles::make_local(jcp()); |
2001 } | |
2002 } | |
2003 return NULL; | |
2004 } | |
2005 JVM_END | |
2006 | |
2007 | |
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2008 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused)) |
0 | 2009 { |
2010 JVMWrapper("JVM_ConstantPoolGetSize"); | |
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2011 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2012 return cp->length(); |
2013 } | |
2014 JVM_END | |
2015 | |
2016 | |
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2017 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index)) |
0 | 2018 { |
2019 JVMWrapper("JVM_ConstantPoolGetClassAt"); | |
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2020 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2021 bounds_check(cp, index, CHECK_NULL); |
2022 constantTag tag = cp->tag_at(index); | |
2023 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
2024 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2025 } | |
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2026 Klass* k = cp->klass_at(index, CHECK_NULL); |
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2027 return (jclass) JNIHandles::make_local(k->java_mirror()); |
0 | 2028 } |
2029 JVM_END | |
2030 | |
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2031 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) |
0 | 2032 { |
2033 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded"); | |
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2034 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2035 bounds_check(cp, index, CHECK_NULL); |
2036 constantTag tag = cp->tag_at(index); | |
2037 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
2038 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2039 } | |
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2040 Klass* k = ConstantPool::klass_at_if_loaded(cp, index); |
0 | 2041 if (k == NULL) return NULL; |
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2042 return (jclass) JNIHandles::make_local(k->java_mirror()); |
0 | 2043 } |
2044 JVM_END | |
2045 | |
2046 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { | |
2047 constantTag tag = cp->tag_at(index); | |
2048 if (!tag.is_method() && !tag.is_interface_method()) { | |
2049 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2050 } | |
2051 int klass_ref = cp->uncached_klass_ref_index_at(index); | |
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2052 Klass* k_o; |
0 | 2053 if (force_resolution) { |
2054 k_o = cp->klass_at(klass_ref, CHECK_NULL); | |
2055 } else { | |
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2056 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); |
0 | 2057 if (k_o == NULL) return NULL; |
2058 } | |
2059 instanceKlassHandle k(THREAD, k_o); | |
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2060 Symbol* name = cp->uncached_name_ref_at(index); |
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2061 Symbol* sig = cp->uncached_signature_ref_at(index); |
0 | 2062 methodHandle m (THREAD, k->find_method(name, sig)); |
2063 if (m.is_null()) { | |
2064 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class"); | |
2065 } | |
2066 oop method; | |
2067 if (!m->is_initializer() || m->is_static()) { | |
2068 method = Reflection::new_method(m, true, true, CHECK_NULL); | |
2069 } else { | |
2070 method = Reflection::new_constructor(m, CHECK_NULL); | |
2071 } | |
2072 return JNIHandles::make_local(method); | |
2073 } | |
2074 | |
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2075 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index)) |
0 | 2076 { |
2077 JVMWrapper("JVM_ConstantPoolGetMethodAt"); | |
2078 JvmtiVMObjectAllocEventCollector oam; | |
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2079 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2080 bounds_check(cp, index, CHECK_NULL); |
2081 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL); | |
2082 return res; | |
2083 } | |
2084 JVM_END | |
2085 | |
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2086 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) |
0 | 2087 { |
2088 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded"); | |
2089 JvmtiVMObjectAllocEventCollector oam; | |
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2090 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2091 bounds_check(cp, index, CHECK_NULL); |
2092 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL); | |
2093 return res; | |
2094 } | |
2095 JVM_END | |
2096 | |
2097 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { | |
2098 constantTag tag = cp->tag_at(index); | |
2099 if (!tag.is_field()) { | |
2100 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2101 } | |
2102 int klass_ref = cp->uncached_klass_ref_index_at(index); | |
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2103 Klass* k_o; |
0 | 2104 if (force_resolution) { |
2105 k_o = cp->klass_at(klass_ref, CHECK_NULL); | |
2106 } else { | |
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2107 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); |
0 | 2108 if (k_o == NULL) return NULL; |
2109 } | |
2110 instanceKlassHandle k(THREAD, k_o); | |
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2111 Symbol* name = cp->uncached_name_ref_at(index); |
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2112 Symbol* sig = cp->uncached_signature_ref_at(index); |
0 | 2113 fieldDescriptor fd; |
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2114 Klass* target_klass = k->find_field(name, sig, &fd); |
0 | 2115 if (target_klass == NULL) { |
2116 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class"); | |
2117 } | |
2118 oop field = Reflection::new_field(&fd, true, CHECK_NULL); | |
2119 return JNIHandles::make_local(field); | |
2120 } | |
2121 | |
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2122 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index)) |
0 | 2123 { |
2124 JVMWrapper("JVM_ConstantPoolGetFieldAt"); | |
2125 JvmtiVMObjectAllocEventCollector oam; | |
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2126 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2127 bounds_check(cp, index, CHECK_NULL); |
2128 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL); | |
2129 return res; | |
2130 } | |
2131 JVM_END | |
2132 | |
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2133 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) |
0 | 2134 { |
2135 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded"); | |
2136 JvmtiVMObjectAllocEventCollector oam; | |
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2137 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2138 bounds_check(cp, index, CHECK_NULL); |
2139 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL); | |
2140 return res; | |
2141 } | |
2142 JVM_END | |
2143 | |
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2144 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index)) |
0 | 2145 { |
2146 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt"); | |
2147 JvmtiVMObjectAllocEventCollector oam; | |
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2148 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2149 bounds_check(cp, index, CHECK_NULL); |
2150 constantTag tag = cp->tag_at(index); | |
2151 if (!tag.is_field_or_method()) { | |
2152 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2153 } | |
2154 int klass_ref = cp->uncached_klass_ref_index_at(index); | |
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2155 Symbol* klass_name = cp->klass_name_at(klass_ref); |
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2156 Symbol* member_name = cp->uncached_name_ref_at(index); |
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2157 Symbol* member_sig = cp->uncached_signature_ref_at(index); |
1142 | 2158 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL); |
0 | 2159 objArrayHandle dest(THREAD, dest_o); |
2160 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL); | |
2161 dest->obj_at_put(0, str()); | |
2162 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); | |
2163 dest->obj_at_put(1, str()); | |
2164 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); | |
2165 dest->obj_at_put(2, str()); | |
2166 return (jobjectArray) JNIHandles::make_local(dest()); | |
2167 } | |
2168 JVM_END | |
2169 | |
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2170 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index)) |
0 | 2171 { |
2172 JVMWrapper("JVM_ConstantPoolGetIntAt"); | |
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2173 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2174 bounds_check(cp, index, CHECK_0); |
2175 constantTag tag = cp->tag_at(index); | |
2176 if (!tag.is_int()) { | |
2177 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2178 } | |
2179 return cp->int_at(index); | |
2180 } | |
2181 JVM_END | |
2182 | |
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2183 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index)) |
0 | 2184 { |
2185 JVMWrapper("JVM_ConstantPoolGetLongAt"); | |
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2186 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2187 bounds_check(cp, index, CHECK_(0L)); |
2188 constantTag tag = cp->tag_at(index); | |
2189 if (!tag.is_long()) { | |
2190 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2191 } | |
2192 return cp->long_at(index); | |
2193 } | |
2194 JVM_END | |
2195 | |
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2196 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index)) |
0 | 2197 { |
2198 JVMWrapper("JVM_ConstantPoolGetFloatAt"); | |
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2199 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2200 bounds_check(cp, index, CHECK_(0.0f)); |
2201 constantTag tag = cp->tag_at(index); | |
2202 if (!tag.is_float()) { | |
2203 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2204 } | |
2205 return cp->float_at(index); | |
2206 } | |
2207 JVM_END | |
2208 | |
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2209 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index)) |
0 | 2210 { |
2211 JVMWrapper("JVM_ConstantPoolGetDoubleAt"); | |
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2212 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2213 bounds_check(cp, index, CHECK_(0.0)); |
2214 constantTag tag = cp->tag_at(index); | |
2215 if (!tag.is_double()) { | |
2216 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2217 } | |
2218 return cp->double_at(index); | |
2219 } | |
2220 JVM_END | |
2221 | |
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2222 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index)) |
0 | 2223 { |
2224 JVMWrapper("JVM_ConstantPoolGetStringAt"); | |
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2225 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2226 bounds_check(cp, index, CHECK_NULL); |
2227 constantTag tag = cp->tag_at(index); | |
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2228 if (!tag.is_string()) { |
0 | 2229 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); |
2230 } | |
2231 oop str = cp->string_at(index, CHECK_NULL); | |
2232 return (jstring) JNIHandles::make_local(str); | |
2233 } | |
2234 JVM_END | |
2235 | |
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2236 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index)) |
0 | 2237 { |
2238 JVMWrapper("JVM_ConstantPoolGetUTF8At"); | |
2239 JvmtiVMObjectAllocEventCollector oam; | |
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2240 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2241 bounds_check(cp, index, CHECK_NULL); |
2242 constantTag tag = cp->tag_at(index); | |
2243 if (!tag.is_symbol()) { | |
2244 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2245 } | |
2177
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2246 Symbol* sym = cp->symbol_at(index); |
0 | 2247 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); |
2248 return (jstring) JNIHandles::make_local(str()); | |
2249 } | |
2250 JVM_END | |
2251 | |
2252 | |
2253 // Assertion support. ////////////////////////////////////////////////////////// | |
2254 | |
2255 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls)) | |
2256 JVMWrapper("JVM_DesiredAssertionStatus"); | |
2257 assert(cls != NULL, "bad class"); | |
2258 | |
2259 oop r = JNIHandles::resolve(cls); | |
2260 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed"); | |
2261 if (java_lang_Class::is_primitive(r)) return false; | |
2262 | |
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2263 Klass* k = java_lang_Class::as_Klass(r); |
6983 | 2264 assert(k->oop_is_instance(), "must be an instance klass"); |
2265 if (! k->oop_is_instance()) return false; | |
0 | 2266 |
2267 ResourceMark rm(THREAD); | |
6983 | 2268 const char* name = k->name()->as_C_string(); |
2269 bool system_class = k->class_loader() == NULL; | |
0 | 2270 return JavaAssertions::enabled(name, system_class); |
2271 | |
2272 JVM_END | |
2273 | |
2274 | |
2275 // Return a new AssertionStatusDirectives object with the fields filled in with | |
2276 // command-line assertion arguments (i.e., -ea, -da). | |
2277 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused)) | |
2278 JVMWrapper("JVM_AssertionStatusDirectives"); | |
2279 JvmtiVMObjectAllocEventCollector oam; | |
2280 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL); | |
2281 return JNIHandles::make_local(env, asd); | |
2282 JVM_END | |
2283 | |
2284 // Verification //////////////////////////////////////////////////////////////////////////////// | |
2285 | |
2286 // Reflection for the verifier ///////////////////////////////////////////////////////////////// | |
2287 | |
2288 // RedefineClasses support: bug 6214132 caused verification to fail. | |
2289 // All functions from this section should call the jvmtiThreadSate function: | |
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2290 // Klass* class_to_verify_considering_redefinition(Klass* klass). |
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2291 // The function returns a Klass* of the _scratch_class if the verifier |
0 | 2292 // was invoked in the middle of the class redefinition. |
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2293 // Otherwise it returns its argument value which is the _the_class Klass*. |
0 | 2294 // Please, refer to the description in the jvmtiThreadSate.hpp. |
2295 | |
2296 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls)) | |
2297 JVMWrapper("JVM_GetClassNameUTF"); | |
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2298 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2299 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
6983 | 2300 return k->name()->as_utf8(); |
0 | 2301 JVM_END |
2302 | |
2303 | |
2304 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types)) | |
2305 JVMWrapper("JVM_GetClassCPTypes"); | |
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2306 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2307 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2308 // types will have length zero if this is not an InstanceKlass |
0 | 2309 // (length is determined by call to JVM_GetClassCPEntriesCount) |
6983 | 2310 if (k->oop_is_instance()) { |
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2311 ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
0 | 2312 for (int index = cp->length() - 1; index >= 0; index--) { |
2313 constantTag tag = cp->tag_at(index); | |
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2314 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value(); |
0 | 2315 } |
2316 } | |
2317 JVM_END | |
2318 | |
2319 | |
2320 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls)) | |
2321 JVMWrapper("JVM_GetClassCPEntriesCount"); | |
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2322 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2323 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
6983 | 2324 if (!k->oop_is_instance()) |
0 | 2325 return 0; |
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2326 return InstanceKlass::cast(k)->constants()->length(); |
0 | 2327 JVM_END |
2328 | |
2329 | |
2330 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls)) | |
2331 JVMWrapper("JVM_GetClassFieldsCount"); | |
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2332 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2333 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
6983 | 2334 if (!k->oop_is_instance()) |
0 | 2335 return 0; |
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2336 return InstanceKlass::cast(k)->java_fields_count(); |
0 | 2337 JVM_END |
2338 | |
2339 | |
2340 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls)) | |
2341 JVMWrapper("JVM_GetClassMethodsCount"); | |
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2342 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2343 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
6983 | 2344 if (!k->oop_is_instance()) |
0 | 2345 return 0; |
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2346 return InstanceKlass::cast(k)->methods()->length(); |
0 | 2347 JVM_END |
2348 | |
2349 | |
2350 // The following methods, used for the verifier, are never called with | |
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2351 // array klasses, so a direct cast to InstanceKlass is safe. |
0 | 2352 // Typically, these methods are called in a loop with bounds determined |
2353 // by the results of JVM_GetClass{Fields,Methods}Count, which return | |
2354 // zero for arrays. | |
2355 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions)) | |
2356 JVMWrapper("JVM_GetMethodIxExceptionIndexes"); | |
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2357 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2358 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2359 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2360 int length = method->checked_exceptions_length(); |
0 | 2361 if (length > 0) { |
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2362 CheckedExceptionElement* table= method->checked_exceptions_start(); |
0 | 2363 for (int i = 0; i < length; i++) { |
2364 exceptions[i] = table[i].class_cp_index; | |
2365 } | |
2366 } | |
2367 JVM_END | |
2368 | |
2369 | |
2370 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index)) | |
2371 JVMWrapper("JVM_GetMethodIxExceptionsCount"); | |
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2372 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2373 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2374 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2375 return method->checked_exceptions_length(); |
0 | 2376 JVM_END |
2377 | |
2378 | |
2379 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code)) | |
2380 JVMWrapper("JVM_GetMethodIxByteCode"); | |
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2381 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2382 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2383 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2384 memcpy(code, method->code_base(), method->code_size()); |
0 | 2385 JVM_END |
2386 | |
2387 | |
2388 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index)) | |
2389 JVMWrapper("JVM_GetMethodIxByteCodeLength"); | |
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2390 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2391 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2392 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2393 return method->code_size(); |
0 | 2394 JVM_END |
2395 | |
2396 | |
2397 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry)) | |
2398 JVMWrapper("JVM_GetMethodIxExceptionTableEntry"); | |
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2399 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2400 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2401 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2402 ExceptionTable extable(method); |
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2403 entry->start_pc = extable.start_pc(entry_index); |
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2404 entry->end_pc = extable.end_pc(entry_index); |
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2405 entry->handler_pc = extable.handler_pc(entry_index); |
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2406 entry->catchType = extable.catch_type_index(entry_index); |
0 | 2407 JVM_END |
2408 | |
2409 | |
2410 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index)) | |
2411 JVMWrapper("JVM_GetMethodIxExceptionTableLength"); | |
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2412 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2413 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2414 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2415 return method->exception_table_length(); |
0 | 2416 JVM_END |
2417 | |
2418 | |
2419 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index)) | |
2420 JVMWrapper("JVM_GetMethodIxModifiers"); | |
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2421 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2422 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2423 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2424 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; |
0 | 2425 JVM_END |
2426 | |
2427 | |
2428 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index)) | |
2429 JVMWrapper("JVM_GetFieldIxModifiers"); | |
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2430 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2431 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2432 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS; |
0 | 2433 JVM_END |
2434 | |
2435 | |
2436 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index)) | |
2437 JVMWrapper("JVM_GetMethodIxLocalsCount"); | |
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2438 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2439 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2440 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2441 return method->max_locals(); |
0 | 2442 JVM_END |
2443 | |
2444 | |
2445 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index)) | |
2446 JVMWrapper("JVM_GetMethodIxArgsSize"); | |
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2447 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2448 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2449 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2450 return method->size_of_parameters(); |
0 | 2451 JVM_END |
2452 | |
2453 | |
2454 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index)) | |
2455 JVMWrapper("JVM_GetMethodIxMaxStack"); | |
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2456 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2457 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2458 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2459 return method->verifier_max_stack(); |
0 | 2460 JVM_END |
2461 | |
2462 | |
2463 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index)) | |
2464 JVMWrapper("JVM_IsConstructorIx"); | |
2465 ResourceMark rm(THREAD); | |
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2466 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2467 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2468 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2469 return method->name() == vmSymbols::object_initializer_name(); |
0 | 2470 JVM_END |
2471 | |
2472 | |
7958
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2473 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index)) |
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2474 JVMWrapper("JVM_IsVMGeneratedMethodIx"); |
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|
2475 ResourceMark rm(THREAD); |
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2476 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
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|
2477 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2478 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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|
2479 return method->is_overpass(); |
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|
2480 JVM_END |
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2481 |
0 | 2482 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index)) |
2483 JVMWrapper("JVM_GetMethodIxIxUTF"); | |
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2484 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2485 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2486 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2487 return method->name()->as_utf8(); |
0 | 2488 JVM_END |
2489 | |
2490 | |
2491 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index)) | |
2492 JVMWrapper("JVM_GetMethodIxSignatureUTF"); | |
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2493 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2494 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2495 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2496 return method->signature()->as_utf8(); |
0 | 2497 JVM_END |
2498 | |
2499 /** | |
2500 * All of these JVM_GetCP-xxx methods are used by the old verifier to | |
2501 * read entries in the constant pool. Since the old verifier always | |
2502 * works on a copy of the code, it will not see any rewriting that | |
2503 * may possibly occur in the middle of verification. So it is important | |
2504 * that nothing it calls tries to use the cpCache instead of the raw | |
2505 * constant pool, so we must use cp->uncached_x methods when appropriate. | |
2506 */ | |
2507 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2508 JVMWrapper("JVM_GetCPFieldNameUTF"); | |
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2509 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2510 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2511 ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
0 | 2512 switch (cp->tag_at(cp_index).value()) { |
2513 case JVM_CONSTANT_Fieldref: | |
2514 return cp->uncached_name_ref_at(cp_index)->as_utf8(); | |
2515 default: | |
2516 fatal("JVM_GetCPFieldNameUTF: illegal constant"); | |
2517 } | |
2518 ShouldNotReachHere(); | |
2519 return NULL; | |
2520 JVM_END | |
2521 | |
2522 | |
2523 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2524 JVMWrapper("JVM_GetCPMethodNameUTF"); | |
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2525 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2526 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2527 ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
0 | 2528 switch (cp->tag_at(cp_index).value()) { |
2529 case JVM_CONSTANT_InterfaceMethodref: | |
2530 case JVM_CONSTANT_Methodref: | |
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2531 case JVM_CONSTANT_NameAndType: // for invokedynamic |
0 | 2532 return cp->uncached_name_ref_at(cp_index)->as_utf8(); |
2533 default: | |
2534 fatal("JVM_GetCPMethodNameUTF: illegal constant"); | |
2535 } | |
2536 ShouldNotReachHere(); | |
2537 return NULL; | |
2538 JVM_END | |
2539 | |
2540 | |
2541 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2542 JVMWrapper("JVM_GetCPMethodSignatureUTF"); | |
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2543 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2544 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2545 ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
0 | 2546 switch (cp->tag_at(cp_index).value()) { |
2547 case JVM_CONSTANT_InterfaceMethodref: | |
2548 case JVM_CONSTANT_Methodref: | |
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2549 case JVM_CONSTANT_NameAndType: // for invokedynamic |
0 | 2550 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); |
2551 default: | |
2552 fatal("JVM_GetCPMethodSignatureUTF: illegal constant"); | |
2553 } | |
2554 ShouldNotReachHere(); | |
2555 return NULL; | |
2556 JVM_END | |
2557 | |
2558 | |
2559 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2560 JVMWrapper("JVM_GetCPFieldSignatureUTF"); | |
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2561 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2562 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2563 ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
0 | 2564 switch (cp->tag_at(cp_index).value()) { |
2565 case JVM_CONSTANT_Fieldref: | |
2566 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); | |
2567 default: | |
2568 fatal("JVM_GetCPFieldSignatureUTF: illegal constant"); | |
2569 } | |
2570 ShouldNotReachHere(); | |
2571 return NULL; | |
2572 JVM_END | |
2573 | |
2574 | |
2575 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2576 JVMWrapper("JVM_GetCPClassNameUTF"); | |
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2577 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2578 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2579 ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
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2580 Symbol* classname = cp->klass_name_at(cp_index); |
0 | 2581 return classname->as_utf8(); |
2582 JVM_END | |
2583 | |
2584 | |
2585 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2586 JVMWrapper("JVM_GetCPFieldClassNameUTF"); | |
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2587 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2588 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2589 ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
0 | 2590 switch (cp->tag_at(cp_index).value()) { |
2591 case JVM_CONSTANT_Fieldref: { | |
2592 int class_index = cp->uncached_klass_ref_index_at(cp_index); | |
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2593 Symbol* classname = cp->klass_name_at(class_index); |
0 | 2594 return classname->as_utf8(); |
2595 } | |
2596 default: | |
2597 fatal("JVM_GetCPFieldClassNameUTF: illegal constant"); | |
2598 } | |
2599 ShouldNotReachHere(); | |
2600 return NULL; | |
2601 JVM_END | |
2602 | |
2603 | |
2604 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2605 JVMWrapper("JVM_GetCPMethodClassNameUTF"); | |
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2606 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2607 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2608 ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
0 | 2609 switch (cp->tag_at(cp_index).value()) { |
2610 case JVM_CONSTANT_Methodref: | |
2611 case JVM_CONSTANT_InterfaceMethodref: { | |
2612 int class_index = cp->uncached_klass_ref_index_at(cp_index); | |
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|
2613 Symbol* classname = cp->klass_name_at(class_index); |
0 | 2614 return classname->as_utf8(); |
2615 } | |
2616 default: | |
2617 fatal("JVM_GetCPMethodClassNameUTF: illegal constant"); | |
2618 } | |
2619 ShouldNotReachHere(); | |
2620 return NULL; | |
2621 JVM_END | |
2622 | |
2623 | |
3938 | 2624 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) |
0 | 2625 JVMWrapper("JVM_GetCPFieldModifiers"); |
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2626 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
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2627 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); |
0 | 2628 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
2629 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); | |
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2630 ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
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2631 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants(); |
0 | 2632 switch (cp->tag_at(cp_index).value()) { |
2633 case JVM_CONSTANT_Fieldref: { | |
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2634 Symbol* name = cp->uncached_name_ref_at(cp_index); |
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|
2635 Symbol* signature = cp->uncached_signature_ref_at(cp_index); |
3938 | 2636 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) { |
2637 if (fs.name() == name && fs.signature() == signature) { | |
2638 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
0 | 2639 } |
2640 } | |
2641 return -1; | |
2642 } | |
2643 default: | |
2644 fatal("JVM_GetCPFieldModifiers: illegal constant"); | |
2645 } | |
2646 ShouldNotReachHere(); | |
2647 return 0; | |
2648 JVM_END | |
2649 | |
2650 | |
2651 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) | |
2652 JVMWrapper("JVM_GetCPMethodModifiers"); | |
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2653 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
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2654 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); |
0 | 2655 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
2656 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); | |
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2657 ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
0 | 2658 switch (cp->tag_at(cp_index).value()) { |
2659 case JVM_CONSTANT_Methodref: | |
2660 case JVM_CONSTANT_InterfaceMethodref: { | |
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2661 Symbol* name = cp->uncached_name_ref_at(cp_index); |
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2662 Symbol* signature = cp->uncached_signature_ref_at(cp_index); |
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2663 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods(); |
0 | 2664 int methods_count = methods->length(); |
2665 for (int i = 0; i < methods_count; i++) { | |
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2666 Method* method = methods->at(i); |
0 | 2667 if (method->name() == name && method->signature() == signature) { |
2668 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; | |
2669 } | |
2670 } | |
2671 return -1; | |
2672 } | |
2673 default: | |
2674 fatal("JVM_GetCPMethodModifiers: illegal constant"); | |
2675 } | |
2676 ShouldNotReachHere(); | |
2677 return 0; | |
2678 JVM_END | |
2679 | |
2680 | |
2681 // Misc ////////////////////////////////////////////////////////////////////////////////////////////// | |
2682 | |
2683 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf)) | |
2684 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything | |
2685 JVM_END | |
2686 | |
2687 | |
2688 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2)) | |
2689 JVMWrapper("JVM_IsSameClassPackage"); | |
2690 oop class1_mirror = JNIHandles::resolve_non_null(class1); | |
2691 oop class2_mirror = JNIHandles::resolve_non_null(class2); | |
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2692 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror); |
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2693 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror); |
0 | 2694 return (jboolean) Reflection::is_same_class_package(klass1, klass2); |
2695 JVM_END | |
2696 | |
2697 | |
2698 // IO functions //////////////////////////////////////////////////////////////////////////////////////// | |
2699 | |
2700 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode)) | |
2701 JVMWrapper2("JVM_Open (%s)", fname); | |
2702 | |
2703 //%note jvm_r6 | |
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diff
changeset
|
2704 int result = os::open(fname, flags, mode); |
0 | 2705 if (result >= 0) { |
2706 return result; | |
2707 } else { | |
2708 switch(errno) { | |
2709 case EEXIST: | |
2710 return JVM_EEXIST; | |
2711 default: | |
2712 return -1; | |
2713 } | |
2714 } | |
2715 JVM_END | |
2716 | |
2717 | |
2718 JVM_LEAF(jint, JVM_Close(jint fd)) | |
2719 JVMWrapper2("JVM_Close (0x%x)", fd); | |
2720 //%note jvm_r6 | |
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diff
changeset
|
2721 return os::close(fd); |
0 | 2722 JVM_END |
2723 | |
2724 | |
2725 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes)) | |
2726 JVMWrapper2("JVM_Read (0x%x)", fd); | |
2727 | |
2728 //%note jvm_r6 | |
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diff
changeset
|
2729 return (jint)os::restartable_read(fd, buf, nbytes); |
0 | 2730 JVM_END |
2731 | |
2732 | |
2733 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes)) | |
2734 JVMWrapper2("JVM_Write (0x%x)", fd); | |
2735 | |
2736 //%note jvm_r6 | |
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diff
changeset
|
2737 return (jint)os::write(fd, buf, nbytes); |
0 | 2738 JVM_END |
2739 | |
2740 | |
2741 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes)) | |
2742 JVMWrapper2("JVM_Available (0x%x)", fd); | |
2743 //%note jvm_r6 | |
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|
2744 return os::available(fd, pbytes); |
0 | 2745 JVM_END |
2746 | |
2747 | |
2748 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence)) | |
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changeset
|
2749 JVMWrapper4("JVM_Lseek (0x%x, " INT64_FORMAT ", %d)", fd, (int64_t) offset, whence); |
0 | 2750 //%note jvm_r6 |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
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diff
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|
2751 return os::lseek(fd, offset, whence); |
0 | 2752 JVM_END |
2753 | |
2754 | |
2755 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length)) | |
17937
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17889
diff
changeset
|
2756 JVMWrapper3("JVM_SetLength (0x%x, " INT64_FORMAT ")", fd, (int64_t) length); |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
2757 return os::ftruncate(fd, length); |
0 | 2758 JVM_END |
2759 | |
2760 | |
2761 JVM_LEAF(jint, JVM_Sync(jint fd)) | |
2762 JVMWrapper2("JVM_Sync (0x%x)", fd); | |
2763 //%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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|
2764 return os::fsync(fd); |
0 | 2765 JVM_END |
2766 | |
2767 | |
2768 // Printing support ////////////////////////////////////////////////// | |
2769 extern "C" { | |
2770 | |
17937
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17889
diff
changeset
|
2771 ATTRIBUTE_PRINTF(3, 0) |
0 | 2772 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) { |
2773 // see bug 4399518, 4417214 | |
2774 if ((intptr_t)count <= 0) return -1; | |
2775 return vsnprintf(str, count, fmt, args); | |
2776 } | |
2777 | |
17937
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diff
changeset
|
2778 ATTRIBUTE_PRINTF(3, 0) |
0 | 2779 int jio_snprintf(char *str, size_t count, const char *fmt, ...) { |
2780 va_list args; | |
2781 int len; | |
2782 va_start(args, fmt); | |
2783 len = jio_vsnprintf(str, count, fmt, args); | |
2784 va_end(args); | |
2785 return len; | |
2786 } | |
2787 | |
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diff
changeset
|
2788 ATTRIBUTE_PRINTF(2,3) |
0 | 2789 int jio_fprintf(FILE* f, const char *fmt, ...) { |
2790 int len; | |
2791 va_list args; | |
2792 va_start(args, fmt); | |
2793 len = jio_vfprintf(f, fmt, args); | |
2794 va_end(args); | |
2795 return len; | |
2796 } | |
2797 | |
17937
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diff
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|
2798 ATTRIBUTE_PRINTF(2, 0) |
0 | 2799 int jio_vfprintf(FILE* f, const char *fmt, va_list args) { |
2800 if (Arguments::vfprintf_hook() != NULL) { | |
2801 return Arguments::vfprintf_hook()(f, fmt, args); | |
2802 } else { | |
2803 return vfprintf(f, fmt, args); | |
2804 } | |
2805 } | |
2806 | |
17937
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drchase
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diff
changeset
|
2807 ATTRIBUTE_PRINTF(1, 2) |
2191 | 2808 JNIEXPORT int jio_printf(const char *fmt, ...) { |
0 | 2809 int len; |
2810 va_list args; | |
2811 va_start(args, fmt); | |
2812 len = jio_vfprintf(defaultStream::output_stream(), fmt, args); | |
2813 va_end(args); | |
2814 return len; | |
2815 } | |
2816 | |
2817 | |
2818 // HotSpot specific jio method | |
2819 void jio_print(const char* s) { | |
2820 // Try to make this function as atomic as possible. | |
2821 if (Arguments::vfprintf_hook() != NULL) { | |
2822 jio_fprintf(defaultStream::output_stream(), "%s", s); | |
2823 } else { | |
513
2328d1d3f8cf
6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2
xlu
parents:
431
diff
changeset
|
2824 // Make an unused local variable to avoid warning from gcc 4.x compiler. |
2328d1d3f8cf
6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2
xlu
parents:
431
diff
changeset
|
2825 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s)); |
0 | 2826 } |
2827 } | |
2828 | |
2829 } // Extern C | |
2830 | |
2831 // java.lang.Thread ////////////////////////////////////////////////////////////////////////////// | |
2832 | |
2833 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock | |
2834 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or | |
2835 // OSThread objects. The exception to this rule is when the target object is the thread | |
2836 // doing the operation, in which case we know that the thread won't exit until the | |
2837 // operation is done (all exits being voluntary). There are a few cases where it is | |
2838 // rather silly to do operations on yourself, like resuming yourself or asking whether | |
2839 // you are alive. While these can still happen, they are not subject to deadlocks if | |
2840 // the lock is held while the operation occurs (this is not the case for suspend, for | |
2841 // instance), and are very unlikely. Because IsAlive needs to be fast and its | |
2842 // implementation is local to this file, we always lock Threads_lock for that one. | |
2843 | |
2844 static void thread_entry(JavaThread* thread, TRAPS) { | |
2845 HandleMark hm(THREAD); | |
2846 Handle obj(THREAD, thread->threadObj()); | |
2847 JavaValue result(T_VOID); | |
2848 JavaCalls::call_virtual(&result, | |
2849 obj, | |
1142 | 2850 KlassHandle(THREAD, SystemDictionary::Thread_klass()), |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
2851 vmSymbols::run_method_name(), |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
2852 vmSymbols::void_method_signature(), |
0 | 2853 THREAD); |
2854 } | |
2855 | |
2856 | |
2857 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread)) | |
2858 JVMWrapper("JVM_StartThread"); | |
2859 JavaThread *native_thread = NULL; | |
2860 | |
2861 // We cannot hold the Threads_lock when we throw an exception, | |
2862 // due to rank ordering issues. Example: we might need to grab the | |
2863 // Heap_lock while we construct the exception. | |
2864 bool throw_illegal_thread_state = false; | |
2865 | |
2866 // We must release the Threads_lock before we can post a jvmti event | |
2867 // in Thread::start. | |
2868 { | |
2869 // Ensure that the C++ Thread and OSThread structures aren't freed before | |
2870 // we operate. | |
2871 MutexLocker mu(Threads_lock); | |
2872 | |
2162
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2873 // 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
|
2874 // 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
|
2875 // 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
parents:
1980
diff
changeset
|
2876 // 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
parents:
1980
diff
changeset
|
2877 // (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
|
2878 // have to check for this |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2879 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
parents:
1980
diff
changeset
|
2880 throw_illegal_thread_state = true; |
0 | 2881 } else { |
2162
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2882 // 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
|
2883 // 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
parents:
1980
diff
changeset
|
2884 |
0 | 2885 jlong size = |
2886 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread)); | |
2887 // Allocate the C++ Thread structure and create the native thread. The | |
2888 // stack size retrieved from java is signed, but the constructor takes | |
2889 // size_t (an unsigned type), so avoid passing negative values which would | |
2890 // result in really large stacks. | |
2891 size_t sz = size > 0 ? (size_t) size : 0; | |
2892 native_thread = new JavaThread(&thread_entry, sz); | |
2893 | |
2894 // At this point it may be possible that no osthread was created for the | |
2895 // JavaThread due to lack of memory. Check for this situation and throw | |
2896 // an exception if necessary. Eventually we may want to change this so | |
2897 // that we only grab the lock if the thread was created successfully - | |
2898 // then we can also do this check and throw the exception in the | |
2899 // JavaThread constructor. | |
2900 if (native_thread->osthread() != NULL) { | |
2901 // Note: the current thread is not being used within "prepare". | |
2902 native_thread->prepare(jthread); | |
2903 } | |
2904 } | |
2905 } | |
2906 | |
2907 if (throw_illegal_thread_state) { | |
2908 THROW(vmSymbols::java_lang_IllegalThreadStateException()); | |
2909 } | |
2910 | |
2911 assert(native_thread != NULL, "Starting null thread?"); | |
2912 | |
2913 if (native_thread->osthread() == NULL) { | |
2914 // No one should hold a reference to the 'native_thread'. | |
2915 delete native_thread; | |
2916 if (JvmtiExport::should_post_resource_exhausted()) { | |
2917 JvmtiExport::post_resource_exhausted( | |
2918 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS, | |
2919 "unable to create new native thread"); | |
2920 } | |
2921 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), | |
2922 "unable to create new native thread"); | |
2923 } | |
2924 | |
2925 Thread::start(native_thread); | |
2926 | |
2927 JVM_END | |
2928 | |
2929 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints | |
2930 // before the quasi-asynchronous exception is delivered. This is a little obtrusive, | |
2931 // 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
|
2932 // same thread as the sender, no safepoint is needed. |
0 | 2933 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable)) |
2934 JVMWrapper("JVM_StopThread"); | |
2935 | |
2936 oop java_throwable = JNIHandles::resolve(throwable); | |
2937 if (java_throwable == NULL) { | |
2938 THROW(vmSymbols::java_lang_NullPointerException()); | |
2939 } | |
2940 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2941 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
|
2942 Events::log_exception(JavaThread::current(), |
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4717
diff
changeset
|
2943 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", |
17937
78bbf4d43a14
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drchase
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17889
diff
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|
2944 p2i(receiver), p2i((address)java_thread), p2i(throwable)); |
2162
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2945 // First check if thread is alive |
0 | 2946 if (receiver != NULL) { |
2947 // Check if exception is getting thrown at self (use oop equality, since the | |
2948 // target object might exit) | |
2949 if (java_thread == thread->threadObj()) { | |
2950 THROW_OOP(java_throwable); | |
2951 } else { | |
2952 // Enques a VM_Operation to stop all threads and then deliver the exception... | |
2953 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable)); | |
2954 } | |
2955 } | |
2162
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2956 else { |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2957 // Either: |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2958 // - target thread has not been started before being stopped, or |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2959 // - target thread already terminated |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2960 // We could read the threadStatus to determine which case it is |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2961 // but that is overkill as it doesn't matter. We must set the |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2962 // stillborn flag for the first case, and if the thread has already |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2963 // exited setting this flag has no affect |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2964 java_lang_Thread::set_stillborn(java_thread); |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2965 } |
0 | 2966 JVM_END |
2967 | |
2968 | |
2969 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread)) | |
2970 JVMWrapper("JVM_IsThreadAlive"); | |
2971 | |
2972 oop thread_oop = JNIHandles::resolve_non_null(jthread); | |
2973 return java_lang_Thread::is_alive(thread_oop); | |
2974 JVM_END | |
2975 | |
2976 | |
2977 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread)) | |
2978 JVMWrapper("JVM_SuspendThread"); | |
2979 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2980 JavaThread* receiver = java_lang_Thread::thread(java_thread); | |
2981 | |
2982 if (receiver != NULL) { | |
2983 // thread has run and has not exited (still on threads list) | |
2984 | |
2985 { | |
2986 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag); | |
2987 if (receiver->is_external_suspend()) { | |
2988 // Don't allow nested external suspend requests. We can't return | |
2989 // an error from this interface so just ignore the problem. | |
2990 return; | |
2991 } | |
2992 if (receiver->is_exiting()) { // thread is in the process of exiting | |
2993 return; | |
2994 } | |
2995 receiver->set_external_suspend(); | |
2996 } | |
2997 | |
2998 // java_suspend() will catch threads in the process of exiting | |
2999 // and will ignore them. | |
3000 receiver->java_suspend(); | |
3001 | |
3002 // It would be nice to have the following assertion in all the | |
3003 // time, but it is possible for a racing resume request to have | |
3004 // resumed this thread right after we suspended it. Temporarily | |
3005 // enable this assertion if you are chasing a different kind of | |
3006 // bug. | |
3007 // | |
3008 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL || | |
3009 // receiver->is_being_ext_suspended(), "thread is not suspended"); | |
3010 } | |
3011 JVM_END | |
3012 | |
3013 | |
3014 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread)) | |
3015 JVMWrapper("JVM_ResumeThread"); | |
3016 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate. | |
3017 // We need to *always* get the threads lock here, since this operation cannot be allowed during | |
3018 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other | |
3019 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code | |
3020 // looks at it. | |
3021 MutexLocker ml(Threads_lock); | |
3022 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
3023 if (thr != NULL) { | |
3024 // the thread has run and is not in the process of exiting | |
3025 thr->java_resume(); | |
3026 } | |
3027 JVM_END | |
3028 | |
3029 | |
3030 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio)) | |
3031 JVMWrapper("JVM_SetThreadPriority"); | |
3032 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
3033 MutexLocker ml(Threads_lock); | |
3034 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
3035 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio); | |
3036 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
3037 if (thr != NULL) { // Thread not yet started; priority pushed down when it is | |
3038 Thread::set_priority(thr, (ThreadPriority)prio); | |
3039 } | |
3040 JVM_END | |
3041 | |
3042 | |
3043 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass)) | |
3044 JVMWrapper("JVM_Yield"); | |
3045 if (os::dont_yield()) return; | |
4006 | 3046 #ifndef USDT2 |
1324
e392695de029
6935224: Adding new DTrace probes to work with Palantir
fparain
parents:
1144
diff
changeset
|
3047 HS_DTRACE_PROBE0(hotspot, thread__yield); |
4006 | 3048 #else /* USDT2 */ |
3049 HOTSPOT_THREAD_YIELD(); | |
3050 #endif /* USDT2 */ | |
0 | 3051 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield. |
3052 // Critical for similar threading behaviour | |
3053 if (ConvertYieldToSleep) { | |
3054 os::sleep(thread, MinSleepInterval, false); | |
3055 } else { | |
3056 os::yield(); | |
3057 } | |
3058 JVM_END | |
3059 | |
3060 | |
3061 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis)) | |
3062 JVMWrapper("JVM_Sleep"); | |
3063 | |
3064 if (millis < 0) { | |
3065 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative"); | |
3066 } | |
3067 | |
3068 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) { | |
3069 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); | |
3070 } | |
3071 | |
3072 // Save current thread state and restore it at the end of this block. | |
3073 // And set new thread state to SLEEPING. | |
3074 JavaThreadSleepState jtss(thread); | |
3075 | |
4006 | 3076 #ifndef USDT2 |
1324
e392695de029
6935224: Adding new DTrace probes to work with Palantir
fparain
parents:
1144
diff
changeset
|
3077 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis); |
4006 | 3078 #else /* USDT2 */ |
3079 HOTSPOT_THREAD_SLEEP_BEGIN( | |
3080 millis); | |
3081 #endif /* USDT2 */ | |
1324
e392695de029
6935224: Adding new DTrace probes to work with Palantir
fparain
parents:
1144
diff
changeset
|
3082 |
10405 | 3083 EventThreadSleep event; |
3084 | |
0 | 3085 if (millis == 0) { |
3086 // When ConvertSleepToYield is on, this matches the classic VM implementation of | |
3087 // JVM_Sleep. Critical for similar threading behaviour (Win32) | |
3088 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep | |
3089 // for SOLARIS | |
3090 if (ConvertSleepToYield) { | |
3091 os::yield(); | |
3092 } else { | |
3093 ThreadState old_state = thread->osthread()->get_state(); | |
3094 thread->osthread()->set_state(SLEEPING); | |
3095 os::sleep(thread, MinSleepInterval, false); | |
3096 thread->osthread()->set_state(old_state); | |
3097 } | |
3098 } else { | |
3099 ThreadState old_state = thread->osthread()->get_state(); | |
3100 thread->osthread()->set_state(SLEEPING); | |
3101 if (os::sleep(thread, millis, true) == OS_INTRPT) { | |
3102 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on | |
3103 // us while we were sleeping. We do not overwrite those. | |
3104 if (!HAS_PENDING_EXCEPTION) { | |
10405 | 3105 if (event.should_commit()) { |
3106 event.set_time(millis); | |
3107 event.commit(); | |
3108 } | |
4006 | 3109 #ifndef USDT2 |
1324
e392695de029
6935224: Adding new DTrace probes to work with Palantir
fparain
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1144
diff
changeset
|
3110 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1); |
4006 | 3111 #else /* USDT2 */ |
3112 HOTSPOT_THREAD_SLEEP_END( | |
3113 1); | |
3114 #endif /* USDT2 */ | |
0 | 3115 // TODO-FIXME: THROW_MSG returns which means we will not call set_state() |
3116 // to properly restore the thread state. That's likely wrong. | |
3117 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); | |
3118 } | |
3119 } | |
3120 thread->osthread()->set_state(old_state); | |
3121 } | |
10405 | 3122 if (event.should_commit()) { |
3123 event.set_time(millis); | |
3124 event.commit(); | |
3125 } | |
4006 | 3126 #ifndef USDT2 |
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diff
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|
3127 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0); |
4006 | 3128 #else /* USDT2 */ |
3129 HOTSPOT_THREAD_SLEEP_END( | |
3130 0); | |
3131 #endif /* USDT2 */ | |
0 | 3132 JVM_END |
3133 | |
3134 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) | |
3135 JVMWrapper("JVM_CurrentThread"); | |
3136 oop jthread = thread->threadObj(); | |
3137 assert (thread != NULL, "no current thread!"); | |
3138 return JNIHandles::make_local(env, jthread); | |
3139 JVM_END | |
3140 | |
3141 | |
3142 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread)) | |
3143 JVMWrapper("JVM_CountStackFrames"); | |
3144 | |
3145 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
3146 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
3147 bool throw_illegal_thread_state = false; | |
3148 int count = 0; | |
3149 | |
3150 { | |
3151 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); | |
3152 // We need to re-resolve the java_thread, since a GC might have happened during the | |
3153 // acquire of the lock | |
3154 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
3155 | |
3156 if (thr == NULL) { | |
3157 // do nothing | |
3158 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) { | |
3159 // Check whether this java thread has been suspended already. If not, throws | |
3160 // IllegalThreadStateException. We defer to throw that exception until | |
3161 // Threads_lock is released since loading exception class has to leave VM. | |
3162 // The correct way to test a thread is actually suspended is | |
3163 // wait_for_ext_suspend_completion(), but we can't call that while holding | |
3164 // the Threads_lock. The above tests are sufficient for our purposes | |
3165 // provided the walkability of the stack is stable - which it isn't | |
3166 // 100% but close enough for most practical purposes. | |
3167 throw_illegal_thread_state = true; | |
3168 } else { | |
3169 // Count all java activation, i.e., number of vframes | |
3170 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) { | |
3171 // Native frames are not counted | |
3172 if (!vfst.method()->is_native()) count++; | |
3173 } | |
3174 } | |
3175 } | |
3176 | |
3177 if (throw_illegal_thread_state) { | |
3178 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(), | |
3179 "this thread is not suspended"); | |
3180 } | |
3181 return count; | |
3182 JVM_END | |
3183 | |
3184 // Consider: A better way to implement JVM_Interrupt() is to acquire | |
3185 // Threads_lock to resolve the jthread into a Thread pointer, fetch | |
3186 // Thread->platformevent, Thread->native_thr, Thread->parker, etc., | |
3187 // drop Threads_lock, and the perform the unpark() and thr_kill() operations | |
3188 // outside the critical section. Threads_lock is hot so we want to minimize | |
3189 // the hold-time. A cleaner interface would be to decompose interrupt into | |
3190 // two steps. The 1st phase, performed under Threads_lock, would return | |
3191 // a closure that'd be invoked after Threads_lock was dropped. | |
3192 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and | |
3193 // admit spurious wakeups. | |
3194 | |
3195 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread)) | |
3196 JVMWrapper("JVM_Interrupt"); | |
3197 | |
3198 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
3199 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
3200 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); | |
3201 // We need to re-resolve the java_thread, since a GC might have happened during the | |
3202 // acquire of the lock | |
3203 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
3204 if (thr != NULL) { | |
3205 Thread::interrupt(thr); | |
3206 } | |
3207 JVM_END | |
3208 | |
3209 | |
3210 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted)) | |
3211 JVMWrapper("JVM_IsInterrupted"); | |
3212 | |
3213 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
3214 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
3215 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); | |
3216 // We need to re-resolve the java_thread, since a GC might have happened during the | |
3217 // acquire of the lock | |
3218 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
3219 if (thr == NULL) { | |
3220 return JNI_FALSE; | |
3221 } else { | |
3222 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0); | |
3223 } | |
3224 JVM_END | |
3225 | |
3226 | |
3227 // Return true iff the current thread has locked the object passed in | |
3228 | |
3229 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj)) | |
3230 JVMWrapper("JVM_HoldsLock"); | |
3231 assert(THREAD->is_Java_thread(), "sanity check"); | |
3232 if (obj == NULL) { | |
3233 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
3234 } | |
3235 Handle h_obj(THREAD, JNIHandles::resolve(obj)); | |
3236 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj); | |
3237 JVM_END | |
3238 | |
3239 | |
3240 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass)) | |
3241 JVMWrapper("JVM_DumpAllStacks"); | |
3242 VM_PrintThreads op; | |
3243 VMThread::execute(&op); | |
3244 if (JvmtiExport::should_post_data_dump()) { | |
3245 JvmtiExport::post_data_dump(); | |
3246 } | |
3247 JVM_END | |
3248 | |
4006 | 3249 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name)) |
3250 JVMWrapper("JVM_SetNativeThreadName"); | |
3251 ResourceMark rm(THREAD); | |
3252 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
3253 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
3254 // Thread naming only supported for the current thread, doesn't work for | |
3255 // target threads. | |
3256 if (Thread::current() == thr && !thr->has_attached_via_jni()) { | |
3257 // we don't set the name of an attached thread to avoid stepping | |
3258 // on other programs | |
3259 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); | |
3260 os::set_native_thread_name(thread_name); | |
3261 } | |
3262 JVM_END | |
0 | 3263 |
3264 // java.lang.SecurityManager /////////////////////////////////////////////////////////////////////// | |
3265 | |
3266 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) { | |
3267 assert(jthread->is_Java_thread(), "must be a Java thread"); | |
3268 if (jthread->privileged_stack_top() == NULL) return false; | |
3269 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) { | |
3270 oop loader = jthread->privileged_stack_top()->class_loader(); | |
3271 if (loader == NULL) return true; | |
3272 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); | |
3273 if (trusted) return true; | |
3274 } | |
3275 return false; | |
3276 } | |
3277 | |
3278 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env)) | |
3279 JVMWrapper("JVM_CurrentLoadedClass"); | |
3280 ResourceMark rm(THREAD); | |
3281 | |
3282 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3283 // if a method in a class in a trusted loader is in a doPrivileged, return NULL | |
3284 bool trusted = is_trusted_frame(thread, &vfst); | |
3285 if (trusted) return NULL; | |
3286 | |
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3287 Method* m = vfst.method(); |
0 | 3288 if (!m->is_native()) { |
6940
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8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
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|
3289 InstanceKlass* holder = m->method_holder(); |
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|
3290 oop loader = holder->class_loader(); |
0 | 3291 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { |
6940
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|
3292 return (jclass) JNIHandles::make_local(env, holder->java_mirror()); |
0 | 3293 } |
3294 } | |
3295 } | |
3296 return NULL; | |
3297 JVM_END | |
3298 | |
3299 | |
3300 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env)) | |
3301 JVMWrapper("JVM_CurrentClassLoader"); | |
3302 ResourceMark rm(THREAD); | |
3303 | |
3304 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3305 | |
3306 // if a method in a class in a trusted loader is in a doPrivileged, return NULL | |
3307 bool trusted = is_trusted_frame(thread, &vfst); | |
3308 if (trusted) return NULL; | |
3309 | |
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3310 Method* m = vfst.method(); |
0 | 3311 if (!m->is_native()) { |
6940
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|
3312 InstanceKlass* holder = m->method_holder(); |
0 | 3313 assert(holder->is_klass(), "just checking"); |
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3314 oop loader = holder->class_loader(); |
0 | 3315 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { |
3316 return JNIHandles::make_local(env, loader); | |
3317 } | |
3318 } | |
3319 } | |
3320 return NULL; | |
3321 JVM_END | |
3322 | |
3323 | |
3324 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env)) | |
3325 JVMWrapper("JVM_GetClassContext"); | |
3326 ResourceMark rm(THREAD); | |
3327 JvmtiVMObjectAllocEventCollector oam; | |
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|
3328 vframeStream vfst(thread); |
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7198429: need checked categorization of caller-sensitive methods in the JDK
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|
3329 |
16885e702c88
7198429: need checked categorization of caller-sensitive methods in the JDK
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|
3330 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) { |
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3331 // This must only be called from SecurityManager.getClassContext |
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|
3332 Method* m = vfst.method(); |
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|
3333 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() && |
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|
3334 m->name() == vmSymbols::getClassContext_name() && |
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|
3335 m->signature() == vmSymbols::void_class_array_signature())) { |
16885e702c88
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|
3336 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext"); |
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|
3337 } |
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|
3338 } |
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|
3339 |
16885e702c88
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|
3340 // Collect method holders |
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8010124: JVM_GetClassContext: use GrowableArray instead of KlassLink
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|
3341 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>(); |
8866
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|
3342 for (; !vfst.at_end(); vfst.security_next()) { |
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|
3343 Method* m = vfst.method(); |
0 | 3344 // Native frames are not returned |
8866
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|
3345 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) { |
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|
3346 Klass* holder = m->method_holder(); |
0 | 3347 assert(holder->is_klass(), "just checking"); |
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|
3348 klass_array->append(holder); |
0 | 3349 } |
3350 } | |
3351 | |
3352 // Create result array of type [Ljava/lang/Class; | |
11001
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|
3353 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL); |
0 | 3354 // Fill in mirrors corresponding to method holders |
11001
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|
3355 for (int i = 0; i < klass_array->length(); i++) { |
c52abc8a0b08
8010124: JVM_GetClassContext: use GrowableArray instead of KlassLink
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|
3356 result->obj_at_put(i, klass_array->at(i)->java_mirror()); |
0 | 3357 } |
3358 | |
3359 return (jobjectArray) JNIHandles::make_local(env, result); | |
3360 JVM_END | |
3361 | |
3362 | |
3363 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name)) | |
3364 JVMWrapper("JVM_ClassDepth"); | |
3365 ResourceMark rm(THREAD); | |
3366 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); | |
3367 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0); | |
3368 | |
3369 const char* str = java_lang_String::as_utf8_string(class_name_str()); | |
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3370 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str)); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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|
3371 if (class_name_sym == NULL) { |
0 | 3372 return -1; |
3373 } | |
3374 | |
3375 int depth = 0; | |
3376 | |
3377 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3378 if (!vfst.method()->is_native()) { | |
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|
3379 InstanceKlass* holder = vfst.method()->method_holder(); |
0 | 3380 assert(holder->is_klass(), "just checking"); |
6940
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6831
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|
3381 if (holder->name() == class_name_sym) { |
0 | 3382 return depth; |
3383 } | |
3384 depth++; | |
3385 } | |
3386 } | |
3387 return -1; | |
3388 JVM_END | |
3389 | |
3390 | |
3391 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env)) | |
3392 JVMWrapper("JVM_ClassLoaderDepth"); | |
3393 ResourceMark rm(THREAD); | |
3394 int depth = 0; | |
3395 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3396 // if a method in a class in a trusted loader is in a doPrivileged, return -1 | |
3397 bool trusted = is_trusted_frame(thread, &vfst); | |
3398 if (trusted) return -1; | |
3399 | |
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|
3400 Method* m = vfst.method(); |
0 | 3401 if (!m->is_native()) { |
6940
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coleenp
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|
3402 InstanceKlass* holder = m->method_holder(); |
0 | 3403 assert(holder->is_klass(), "just checking"); |
6940
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|
3404 oop loader = holder->class_loader(); |
0 | 3405 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { |
3406 return depth; | |
3407 } | |
3408 depth++; | |
3409 } | |
3410 } | |
3411 return -1; | |
3412 JVM_END | |
3413 | |
3414 | |
3415 // java.lang.Package //////////////////////////////////////////////////////////////// | |
3416 | |
3417 | |
3418 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name)) | |
3419 JVMWrapper("JVM_GetSystemPackage"); | |
3420 ResourceMark rm(THREAD); | |
3421 JvmtiVMObjectAllocEventCollector oam; | |
3422 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); | |
3423 oop result = ClassLoader::get_system_package(str, CHECK_NULL); | |
3424 return (jstring) JNIHandles::make_local(result); | |
3425 JVM_END | |
3426 | |
3427 | |
3428 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env)) | |
3429 JVMWrapper("JVM_GetSystemPackages"); | |
3430 JvmtiVMObjectAllocEventCollector oam; | |
3431 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL); | |
3432 return (jobjectArray) JNIHandles::make_local(result); | |
3433 JVM_END | |
3434 | |
3435 | |
3436 // ObjectInputStream /////////////////////////////////////////////////////////////// | |
3437 | |
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|
3438 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) { |
0 | 3439 if (current_class == NULL) { |
3440 return true; | |
3441 } | |
3442 if ((current_class == field_class) || access.is_public()) { | |
3443 return true; | |
3444 } | |
3445 | |
3446 if (access.is_protected()) { | |
3447 // See if current_class is a subclass of field_class | |
6983 | 3448 if (current_class->is_subclass_of(field_class)) { |
0 | 3449 return true; |
3450 } | |
3451 } | |
3452 | |
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|
3453 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class)); |
0 | 3454 } |
3455 | |
3456 | |
3457 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4 | |
3458 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass)) | |
3459 JVMWrapper("JVM_AllocateNewObject"); | |
3460 JvmtiVMObjectAllocEventCollector oam; | |
3461 // Receiver is not used | |
3462 oop curr_mirror = JNIHandles::resolve_non_null(currClass); | |
3463 oop init_mirror = JNIHandles::resolve_non_null(initClass); | |
3464 | |
3465 // Cannot instantiate primitive types | |
3466 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) { | |
3467 ResourceMark rm(THREAD); | |
3468 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3469 } | |
3470 | |
3471 // Arrays not allowed here, must use JVM_AllocateNewArray | |
6983 | 3472 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() || |
3473 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) { | |
0 | 3474 ResourceMark rm(THREAD); |
3475 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3476 } | |
3477 | |
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changeset
|
3478 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror)); |
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changeset
|
3479 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror)); |
0 | 3480 |
3481 assert(curr_klass->is_subclass_of(init_klass()), "just checking"); | |
3482 | |
3483 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly. | |
3484 curr_klass->check_valid_for_instantiation(false, CHECK_NULL); | |
3485 | |
3486 // Make sure klass is initialized, since we are about to instantiate one of them. | |
3487 curr_klass->initialize(CHECK_NULL); | |
3488 | |
3489 methodHandle m (THREAD, | |
3490 init_klass->find_method(vmSymbols::object_initializer_name(), | |
3491 vmSymbols::void_method_signature())); | |
3492 if (m.is_null()) { | |
3493 ResourceMark rm(THREAD); | |
3494 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), | |
6983 | 3495 Method::name_and_sig_as_C_string(init_klass(), |
0 | 3496 vmSymbols::object_initializer_name(), |
3497 vmSymbols::void_method_signature())); | |
3498 } | |
3499 | |
3500 if (curr_klass == init_klass && !m->is_public()) { | |
3501 // Calling the constructor for class 'curr_klass'. | |
3502 // Only allow calls to a public no-arg constructor. | |
3503 // This path corresponds to creating an Externalizable object. | |
3504 THROW_0(vmSymbols::java_lang_IllegalAccessException()); | |
3505 } | |
3506 | |
3507 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) { | |
3508 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb' | |
3509 THROW_0(vmSymbols::java_lang_IllegalAccessException()); | |
3510 } | |
3511 | |
3512 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL); | |
3513 // Call constructor m. This might call a constructor higher up in the hierachy | |
3514 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL); | |
3515 | |
3516 return JNIHandles::make_local(obj()); | |
3517 JVM_END | |
3518 | |
3519 | |
3520 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length)) | |
3521 JVMWrapper("JVM_AllocateNewArray"); | |
3522 JvmtiVMObjectAllocEventCollector oam; | |
3523 oop mirror = JNIHandles::resolve_non_null(currClass); | |
3524 | |
3525 if (java_lang_Class::is_primitive(mirror)) { | |
3526 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3527 } | |
6725
da91efe96a93
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changeset
|
3528 Klass* k = java_lang_Class::as_Klass(mirror); |
0 | 3529 oop result; |
3530 | |
6725
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diff
changeset
|
3531 if (k->oop_is_typeArray()) { |
0 | 3532 // typeArray |
6831
d8ce2825b193
8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents:
6725
diff
changeset
|
3533 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL); |
6725
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diff
changeset
|
3534 } else if (k->oop_is_objArray()) { |
0 | 3535 // objArray |
6831
d8ce2825b193
8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents:
6725
diff
changeset
|
3536 ObjArrayKlass* oak = ObjArrayKlass::cast(k); |
0 | 3537 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior) |
3538 result = oak->allocate(length, CHECK_NULL); | |
3539 } else { | |
3540 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3541 } | |
3542 return JNIHandles::make_local(env, result); | |
3543 JVM_END | |
3544 | |
3545 | |
3546 // Return the first non-null class loader up the execution stack, or null | |
3547 // if only code from the null class loader is on the stack. | |
3548 | |
3549 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env)) | |
3550 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3551 // UseNewReflection | |
3552 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection | |
6940
18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
parents:
6831
diff
changeset
|
3553 oop loader = vfst.method()->method_holder()->class_loader(); |
0 | 3554 if (loader != NULL) { |
3555 return JNIHandles::make_local(env, loader); | |
3556 } | |
3557 } | |
3558 return NULL; | |
3559 JVM_END | |
3560 | |
3561 | |
3562 // Load a class relative to the most recent class on the stack with a non-null | |
3563 // classloader. | |
3564 // This function has been deprecated and should not be considered part of the | |
3565 // specified JVM interface. | |
3566 | |
3567 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver, | |
3568 jclass currClass, jstring currClassName)) | |
3569 JVMWrapper("JVM_LoadClass0"); | |
3570 // Receiver is not used | |
3571 ResourceMark rm(THREAD); | |
3572 | |
3573 // Class name argument is not guaranteed to be in internal format | |
3574 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName)); | |
3575 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL); | |
3576 | |
3577 const char* str = java_lang_String::as_utf8_string(string()); | |
3578 | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3579 if (str == NULL || (int)strlen(str) > Symbol::max_length()) { |
0 | 3580 // It's impossible to create this class; the name cannot fit |
3581 // into the constant pool. | |
3582 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str); | |
3583 } | |
3584 | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3585 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL); |
0 | 3586 Handle curr_klass (THREAD, JNIHandles::resolve(currClass)); |
3587 // Find the most recent class on the stack with a non-null classloader | |
3588 oop loader = NULL; | |
3589 oop protection_domain = NULL; | |
3590 if (curr_klass.is_null()) { | |
3591 for (vframeStream vfst(thread); | |
3592 !vfst.at_end() && loader == NULL; | |
3593 vfst.next()) { | |
3594 if (!vfst.method()->is_native()) { | |
6940
18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
parents:
6831
diff
changeset
|
3595 InstanceKlass* holder = vfst.method()->method_holder(); |
18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
parents:
6831
diff
changeset
|
3596 loader = holder->class_loader(); |
18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
parents:
6831
diff
changeset
|
3597 protection_domain = holder->protection_domain(); |
0 | 3598 } |
3599 } | |
3600 } else { | |
6725
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changeset
|
3601 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass()); |
da91efe96a93
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diff
changeset
|
3602 loader = InstanceKlass::cast(curr_klass_oop)->class_loader(); |
da91efe96a93
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diff
changeset
|
3603 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain(); |
0 | 3604 } |
3605 Handle h_loader(THREAD, loader); | |
3606 Handle h_prot (THREAD, protection_domain); | |
657
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
3607 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
|
3608 false, thread); |
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
3609 if (TraceClassResolution && result != NULL) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6271
diff
changeset
|
3610 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); |
657
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
3611 } |
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
3612 return result; |
0 | 3613 JVM_END |
3614 | |
3615 | |
3616 // Array /////////////////////////////////////////////////////////////////////////////////////////// | |
3617 | |
3618 | |
3619 // resolve array handle and check arguments | |
3620 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) { | |
3621 if (arr == NULL) { | |
3622 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
3623 } | |
3624 oop a = JNIHandles::resolve_non_null(arr); | |
6725
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diff
changeset
|
3625 if (!a->is_array() || (type_array_only && !a->is_typeArray())) { |
0 | 3626 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array"); |
3627 } | |
3628 return arrayOop(a); | |
3629 } | |
3630 | |
3631 | |
3632 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr)) | |
3633 JVMWrapper("JVM_GetArrayLength"); | |
3634 arrayOop a = check_array(env, arr, false, CHECK_0); | |
3635 return a->length(); | |
3636 JVM_END | |
3637 | |
3638 | |
3639 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index)) | |
3640 JVMWrapper("JVM_Array_Get"); | |
3641 JvmtiVMObjectAllocEventCollector oam; | |
3642 arrayOop a = check_array(env, arr, false, CHECK_NULL); | |
3643 jvalue value; | |
3644 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL); | |
3645 oop box = Reflection::box(&value, type, CHECK_NULL); | |
3646 return JNIHandles::make_local(env, box); | |
3647 JVM_END | |
3648 | |
3649 | |
3650 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode)) | |
3651 JVMWrapper("JVM_GetPrimitiveArrayElement"); | |
3652 jvalue value; | |
3653 value.i = 0; // to initialize value before getting used in CHECK | |
3654 arrayOop a = check_array(env, arr, true, CHECK_(value)); | |
3655 assert(a->is_typeArray(), "just checking"); | |
3656 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value)); | |
3657 BasicType wide_type = (BasicType) wCode; | |
3658 if (type != wide_type) { | |
3659 Reflection::widen(&value, type, wide_type, CHECK_(value)); | |
3660 } | |
3661 return value; | |
3662 JVM_END | |
3663 | |
3664 | |
3665 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val)) | |
3666 JVMWrapper("JVM_SetArrayElement"); | |
3667 arrayOop a = check_array(env, arr, false, CHECK); | |
3668 oop box = JNIHandles::resolve(val); | |
3669 jvalue value; | |
3670 value.i = 0; // to initialize value before getting used in CHECK | |
3671 BasicType value_type; | |
3672 if (a->is_objArray()) { | |
3673 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array | |
3674 value_type = Reflection::unbox_for_regular_object(box, &value); | |
3675 } else { | |
3676 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); | |
3677 } | |
3678 Reflection::array_set(&value, a, index, value_type, CHECK); | |
3679 JVM_END | |
3680 | |
3681 | |
3682 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode)) | |
3683 JVMWrapper("JVM_SetPrimitiveArrayElement"); | |
3684 arrayOop a = check_array(env, arr, true, CHECK); | |
3685 assert(a->is_typeArray(), "just checking"); | |
3686 BasicType value_type = (BasicType) vCode; | |
3687 Reflection::array_set(&v, a, index, value_type, CHECK); | |
3688 JVM_END | |
3689 | |
3690 | |
3691 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length)) | |
3692 JVMWrapper("JVM_NewArray"); | |
3693 JvmtiVMObjectAllocEventCollector oam; | |
3694 oop element_mirror = JNIHandles::resolve(eltClass); | |
3695 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL); | |
3696 return JNIHandles::make_local(env, result); | |
3697 JVM_END | |
3698 | |
3699 | |
3700 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim)) | |
3701 JVMWrapper("JVM_NewMultiArray"); | |
3702 JvmtiVMObjectAllocEventCollector oam; | |
3703 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL); | |
3704 oop element_mirror = JNIHandles::resolve(eltClass); | |
3705 assert(dim_array->is_typeArray(), "just checking"); | |
3706 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL); | |
3707 return JNIHandles::make_local(env, result); | |
3708 JVM_END | |
3709 | |
3710 | |
3711 // Networking library support //////////////////////////////////////////////////////////////////// | |
3712 | |
3713 JVM_LEAF(jint, JVM_InitializeSocketLibrary()) | |
3714 JVMWrapper("JVM_InitializeSocketLibrary"); | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3715 return 0; |
0 | 3716 JVM_END |
3717 | |
3718 | |
3719 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol)) | |
3720 JVMWrapper("JVM_Socket"); | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3721 return os::socket(domain, type, protocol); |
0 | 3722 JVM_END |
3723 | |
3724 | |
3725 JVM_LEAF(jint, JVM_SocketClose(jint fd)) | |
3726 JVMWrapper2("JVM_SocketClose (0x%x)", fd); | |
3727 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3728 return os::socket_close(fd); |
0 | 3729 JVM_END |
3730 | |
3731 | |
3732 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto)) | |
3733 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd); | |
3734 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3735 return os::socket_shutdown(fd, howto); |
0 | 3736 JVM_END |
3737 | |
3738 | |
3739 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags)) | |
3740 JVMWrapper2("JVM_Recv (0x%x)", fd); | |
3741 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3742 return os::recv(fd, buf, (size_t)nBytes, (uint)flags); |
0 | 3743 JVM_END |
3744 | |
3745 | |
3746 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags)) | |
3747 JVMWrapper2("JVM_Send (0x%x)", fd); | |
3748 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3749 return os::send(fd, buf, (size_t)nBytes, (uint)flags); |
0 | 3750 JVM_END |
3751 | |
3752 | |
3753 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout)) | |
3754 JVMWrapper2("JVM_Timeout (0x%x)", fd); | |
3755 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3756 return os::timeout(fd, timeout); |
0 | 3757 JVM_END |
3758 | |
3759 | |
3760 JVM_LEAF(jint, JVM_Listen(jint fd, jint count)) | |
3761 JVMWrapper2("JVM_Listen (0x%x)", fd); | |
3762 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3763 return os::listen(fd, count); |
0 | 3764 JVM_END |
3765 | |
3766 | |
3767 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len)) | |
3768 JVMWrapper2("JVM_Connect (0x%x)", fd); | |
3769 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3770 return os::connect(fd, him, (socklen_t)len); |
0 | 3771 JVM_END |
3772 | |
3773 | |
3774 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len)) | |
3775 JVMWrapper2("JVM_Bind (0x%x)", fd); | |
3776 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3777 return os::bind(fd, him, (socklen_t)len); |
0 | 3778 JVM_END |
3779 | |
3780 | |
3781 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len)) | |
3782 JVMWrapper2("JVM_Accept (0x%x)", fd); | |
3783 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3784 socklen_t socklen = (socklen_t)(*len); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3785 jint result = os::accept(fd, him, &socklen); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3786 *len = (jint)socklen; |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3787 return result; |
0 | 3788 JVM_END |
3789 | |
3790 | |
3791 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen)) | |
3792 JVMWrapper2("JVM_RecvFrom (0x%x)", fd); | |
3793 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3794 socklen_t socklen = (socklen_t)(*fromlen); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3795 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
|
3796 *fromlen = (int)socklen; |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3797 return result; |
0 | 3798 JVM_END |
3799 | |
3800 | |
3801 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len)) | |
3802 JVMWrapper2("JVM_GetSockName (0x%x)", fd); | |
3803 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3804 socklen_t socklen = (socklen_t)(*len); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3805 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
|
3806 *len = (int)socklen; |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3807 return result; |
0 | 3808 JVM_END |
3809 | |
3810 | |
3811 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen)) | |
3812 JVMWrapper2("JVM_SendTo (0x%x)", fd); | |
3813 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3814 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen); |
0 | 3815 JVM_END |
3816 | |
3817 | |
3818 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes)) | |
3819 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd); | |
3820 //%note jvm_r6 | |
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3821 return os::socket_available(fd, pbytes); |
0 | 3822 JVM_END |
3823 | |
3824 | |
3825 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen)) | |
3826 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); | |
3827 //%note jvm_r6 | |
4717
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3828 socklen_t socklen = (socklen_t)(*optlen); |
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|
3829 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen); |
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3830 *optlen = (int)socklen; |
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|
3831 return result; |
0 | 3832 JVM_END |
3833 | |
3834 | |
3835 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen)) | |
3836 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); | |
3837 //%note jvm_r6 | |
4717
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3838 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen); |
0 | 3839 JVM_END |
3840 | |
4717
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3841 |
0 | 3842 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen)) |
3843 JVMWrapper("JVM_GetHostName"); | |
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3844 return os::get_host_name(name, namelen); |
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|
3845 JVM_END |
0 | 3846 |
4717
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3847 |
0 | 3848 // Library support /////////////////////////////////////////////////////////////////////////// |
3849 | |
3850 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name)) | |
3851 //%note jvm_ct | |
3852 JVMWrapper2("JVM_LoadLibrary (%s)", name); | |
3853 char ebuf[1024]; | |
3854 void *load_result; | |
3855 { | |
3856 ThreadToNativeFromVM ttnfvm(thread); | |
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3857 load_result = os::dll_load(name, ebuf, sizeof ebuf); |
0 | 3858 } |
3859 if (load_result == NULL) { | |
3860 char msg[1024]; | |
3861 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf); | |
3862 // Since 'ebuf' may contain a string encoded using | |
3863 // platform encoding scheme, we need to pass | |
3864 // Exceptions::unsafe_to_utf8 to the new_exception method | |
3865 // as the last argument. See bug 6367357. | |
3866 Handle h_exception = | |
3867 Exceptions::new_exception(thread, | |
3868 vmSymbols::java_lang_UnsatisfiedLinkError(), | |
3869 msg, Exceptions::unsafe_to_utf8); | |
3870 | |
3871 THROW_HANDLE_0(h_exception); | |
3872 } | |
3873 return load_result; | |
3874 JVM_END | |
3875 | |
3876 | |
3877 JVM_LEAF(void, JVM_UnloadLibrary(void* handle)) | |
3878 JVMWrapper("JVM_UnloadLibrary"); | |
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|
3879 os::dll_unload(handle); |
0 | 3880 JVM_END |
3881 | |
3882 | |
3883 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name)) | |
3884 JVMWrapper2("JVM_FindLibraryEntry (%s)", name); | |
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3885 return os::dll_lookup(handle, name); |
0 | 3886 JVM_END |
3887 | |
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3888 |
0 | 3889 // Floating point support //////////////////////////////////////////////////////////////////// |
3890 | |
3891 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a)) | |
3892 JVMWrapper("JVM_IsNaN"); | |
3893 return g_isnan(a); | |
3894 JVM_END | |
3895 | |
3896 | |
3897 // JNI version /////////////////////////////////////////////////////////////////////////////// | |
3898 | |
3899 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version)) | |
3900 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version); | |
3901 return Threads::is_supported_jni_version_including_1_1(version); | |
3902 JVM_END | |
3903 | |
3904 | |
3905 // String support /////////////////////////////////////////////////////////////////////////// | |
3906 | |
3907 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str)) | |
3908 JVMWrapper("JVM_InternString"); | |
3909 JvmtiVMObjectAllocEventCollector oam; | |
3910 if (str == NULL) return NULL; | |
3911 oop string = JNIHandles::resolve_non_null(str); | |
3912 oop result = StringTable::intern(string, CHECK_NULL); | |
3913 return (jstring) JNIHandles::make_local(env, result); | |
3914 JVM_END | |
3915 | |
3916 | |
3917 // Raw monitor support ////////////////////////////////////////////////////////////////////// | |
3918 | |
3919 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock | |
3920 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because | |
3921 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check | |
3922 // that only works with java threads. | |
3923 | |
3924 | |
3925 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) { | |
3926 VM_Exit::block_if_vm_exited(); | |
3927 JVMWrapper("JVM_RawMonitorCreate"); | |
3928 return new Mutex(Mutex::native, "JVM_RawMonitorCreate"); | |
3929 } | |
3930 | |
3931 | |
3932 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) { | |
3933 VM_Exit::block_if_vm_exited(); | |
3934 JVMWrapper("JVM_RawMonitorDestroy"); | |
3935 delete ((Mutex*) mon); | |
3936 } | |
3937 | |
3938 | |
3939 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) { | |
3940 VM_Exit::block_if_vm_exited(); | |
3941 JVMWrapper("JVM_RawMonitorEnter"); | |
3942 ((Mutex*) mon)->jvm_raw_lock(); | |
3943 return 0; | |
3944 } | |
3945 | |
3946 | |
3947 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) { | |
3948 VM_Exit::block_if_vm_exited(); | |
3949 JVMWrapper("JVM_RawMonitorExit"); | |
3950 ((Mutex*) mon)->jvm_raw_unlock(); | |
3951 } | |
3952 | |
3953 | |
3954 // Support for Serialization | |
3955 | |
3956 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value); | |
3957 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value); | |
3958 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value); | |
3959 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value); | |
3960 | |
3961 static IntBitsToFloatFn int_bits_to_float_fn = NULL; | |
3962 static LongBitsToDoubleFn long_bits_to_double_fn = NULL; | |
3963 static FloatToIntBitsFn float_to_int_bits_fn = NULL; | |
3964 static DoubleToLongBitsFn double_to_long_bits_fn = NULL; | |
3965 | |
3966 | |
3967 void initialize_converter_functions() { | |
3968 if (JDK_Version::is_gte_jdk14x_version()) { | |
3969 // These functions only exist for compatibility with 1.3.1 and earlier | |
3970 return; | |
3971 } | |
3972 | |
3973 // called from universe_post_init() | |
3974 assert( | |
3975 int_bits_to_float_fn == NULL && | |
3976 long_bits_to_double_fn == NULL && | |
3977 float_to_int_bits_fn == NULL && | |
3978 double_to_long_bits_fn == NULL , | |
3979 "initialization done twice" | |
3980 ); | |
3981 // initialize | |
3982 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F")); | |
3983 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D")); | |
3984 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I")); | |
3985 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J")); | |
3986 // verify | |
3987 assert( | |
3988 int_bits_to_float_fn != NULL && | |
3989 long_bits_to_double_fn != NULL && | |
3990 float_to_int_bits_fn != NULL && | |
3991 double_to_long_bits_fn != NULL , | |
3992 "initialization failed" | |
3993 ); | |
3994 } | |
3995 | |
3996 | |
3997 | |
3998 // Shared JNI/JVM entry points ////////////////////////////////////////////////////////////// | |
3999 | |
2177
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4000 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) { |
0 | 4001 // Security Note: |
4002 // The Java level wrapper will perform the necessary security check allowing | |
4003 // us to pass the NULL as the initiating class loader. | |
6725
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4004 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL); |
878
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|
4005 |
0 | 4006 KlassHandle klass_handle(THREAD, klass); |
4007 // Check if we should initialize the class | |
4008 if (init && klass_handle->oop_is_instance()) { | |
4009 klass_handle->initialize(CHECK_NULL); | |
4010 } | |
4011 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror()); | |
4012 } | |
4013 | |
4014 | |
4015 // Internal SQE debugging support /////////////////////////////////////////////////////////// | |
4016 | |
4017 #ifndef PRODUCT | |
4018 | |
4019 extern "C" { | |
4020 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get); | |
4021 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get); | |
4022 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj); | |
4023 } | |
4024 | |
4025 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get)) | |
4026 JVMWrapper("JVM_AccessBoolVMFlag"); | |
12322
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diff
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|
4027 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, Flag::INTERNAL); |
0 | 4028 JVM_END |
4029 | |
4030 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get)) | |
4031 JVMWrapper("JVM_AccessVMIntFlag"); | |
4032 intx v; | |
12322
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|
4033 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, Flag::INTERNAL); |
0 | 4034 *value = (jint)v; |
4035 return result; | |
4036 JVM_END | |
4037 | |
4038 | |
4039 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj)) | |
4040 JVMWrapper("JVM_VMBreakPoint"); | |
4041 oop the_obj = JNIHandles::resolve(obj); | |
4042 BREAKPOINT; | |
4043 JVM_END | |
4044 | |
4045 | |
4046 #endif | |
4047 | |
4048 | |
4049 // Method /////////////////////////////////////////////////////////////////////////////////////////// | |
4050 | |
4051 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0)) | |
4052 JVMWrapper("JVM_InvokeMethod"); | |
4053 Handle method_handle; | |
4054 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) { | |
4055 method_handle = Handle(THREAD, JNIHandles::resolve(method)); | |
4056 Handle receiver(THREAD, JNIHandles::resolve(obj)); | |
4057 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); | |
4058 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL); | |
4059 jobject res = JNIHandles::make_local(env, result); | |
4060 if (JvmtiExport::should_post_vm_object_alloc()) { | |
4061 oop ret_type = java_lang_reflect_Method::return_type(method_handle()); | |
4062 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!"); | |
4063 if (java_lang_Class::is_primitive(ret_type)) { | |
4064 // Only for primitive type vm allocates memory for java object. | |
4065 // See box() method. | |
4066 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); | |
4067 } | |
4068 } | |
4069 return res; | |
4070 } else { | |
4071 THROW_0(vmSymbols::java_lang_StackOverflowError()); | |
4072 } | |
4073 JVM_END | |
4074 | |
4075 | |
4076 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0)) | |
4077 JVMWrapper("JVM_NewInstanceFromConstructor"); | |
4078 oop constructor_mirror = JNIHandles::resolve(c); | |
4079 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); | |
4080 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL); | |
4081 jobject res = JNIHandles::make_local(env, result); | |
4082 if (JvmtiExport::should_post_vm_object_alloc()) { | |
4083 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); | |
4084 } | |
4085 return res; | |
4086 JVM_END | |
4087 | |
4088 // Atomic /////////////////////////////////////////////////////////////////////////////////////////// | |
4089 | |
4090 JVM_LEAF(jboolean, JVM_SupportsCX8()) | |
4091 JVMWrapper("JVM_SupportsCX8"); | |
4092 return VM_Version::supports_cx8(); | |
4093 JVM_END | |
4094 | |
4095 | |
4096 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal)) | |
4097 JVMWrapper("JVM_CX8Field"); | |
4098 jlong res; | |
4099 oop o = JNIHandles::resolve(obj); | |
4100 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); | |
4101 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs); | |
4102 | |
4103 assert(VM_Version::supports_cx8(), "cx8 not supported"); | |
4104 res = Atomic::cmpxchg(newVal, addr, oldVal); | |
4105 | |
4106 return res == oldVal; | |
4107 JVM_END | |
4108 | |
116
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4109 // DTrace /////////////////////////////////////////////////////////////////// |
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4110 |
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|
4111 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env)) |
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4112 JVMWrapper("JVM_DTraceGetVersion"); |
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4113 return (jint)JVM_TRACING_DTRACE_VERSION; |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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|
4114 JVM_END |
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|
4115 |
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4116 JVM_ENTRY(jlong,JVM_DTraceActivate( |
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4117 JNIEnv* env, jint version, jstring module_name, jint providers_count, |
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4118 JVM_DTraceProvider* providers)) |
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|
4119 JVMWrapper("JVM_DTraceActivate"); |
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|
4120 return DTraceJSDT::activate( |
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|
4121 version, module_name, providers_count, providers, CHECK_0); |
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|
4122 JVM_END |
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4123 |
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4124 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method)) |
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|
4125 JVMWrapper("JVM_DTraceIsProbeEnabled"); |
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4126 return DTraceJSDT::is_probe_enabled(method); |
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4127 JVM_END |
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|
4128 |
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4129 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle)) |
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4130 JVMWrapper("JVM_DTraceDispose"); |
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4131 DTraceJSDT::dispose(handle); |
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4132 JVM_END |
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4133 |
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4134 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env)) |
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4135 JVMWrapper("JVM_DTraceIsSupported"); |
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4136 return DTraceJSDT::is_supported(); |
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4137 JVM_END |
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4138 |
0 | 4139 // Returns an array of all live Thread objects (VM internal JavaThreads, |
4140 // jvmti agent threads, and JNI attaching threads are skipped) | |
4141 // See CR 6404306 regarding JNI attaching threads | |
4142 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy)) | |
4143 ResourceMark rm(THREAD); | |
4144 ThreadsListEnumerator tle(THREAD, false, false); | |
4145 JvmtiVMObjectAllocEventCollector oam; | |
4146 | |
4147 int num_threads = tle.num_threads(); | |
1142 | 4148 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL); |
0 | 4149 objArrayHandle threads_ah(THREAD, r); |
4150 | |
4151 for (int i = 0; i < num_threads; i++) { | |
4152 Handle h = tle.get_threadObj(i); | |
4153 threads_ah->obj_at_put(i, h()); | |
4154 } | |
4155 | |
4156 return (jobjectArray) JNIHandles::make_local(env, threads_ah()); | |
4157 JVM_END | |
4158 | |
4159 | |
4160 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods | |
4161 // Return StackTraceElement[][], each element is the stack trace of a thread in | |
4162 // the corresponding entry in the given threads array | |
4163 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads)) | |
4164 JVMWrapper("JVM_DumpThreads"); | |
4165 JvmtiVMObjectAllocEventCollector oam; | |
4166 | |
4167 // Check if threads is null | |
4168 if (threads == NULL) { | |
4169 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
4170 } | |
4171 | |
4172 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads)); | |
4173 objArrayHandle ah(THREAD, a); | |
4174 int num_threads = ah->length(); | |
4175 // check if threads is non-empty array | |
4176 if (num_threads == 0) { | |
4177 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); | |
4178 } | |
4179 | |
4180 // check if threads is not an array of objects of Thread class | |
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4181 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass(); |
1142 | 4182 if (k != SystemDictionary::Thread_klass()) { |
0 | 4183 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); |
4184 } | |
4185 | |
4186 ResourceMark rm(THREAD); | |
4187 | |
4188 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); | |
4189 for (int i = 0; i < num_threads; i++) { | |
4190 oop thread_obj = ah->obj_at(i); | |
4191 instanceHandle h(THREAD, (instanceOop) thread_obj); | |
4192 thread_handle_array->append(h); | |
4193 } | |
4194 | |
4195 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL); | |
4196 return (jobjectArray)JNIHandles::make_local(env, stacktraces()); | |
4197 | |
4198 JVM_END | |
4199 | |
4200 // JVM monitoring and management support | |
4201 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version)) | |
4202 return Management::get_jmm_interface(version); | |
4203 JVM_END | |
4204 | |
4205 // com.sun.tools.attach.VirtualMachine agent properties support | |
4206 // | |
4207 // Initialize the agent properties with the properties maintained in the VM | |
4208 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties)) | |
4209 JVMWrapper("JVM_InitAgentProperties"); | |
4210 ResourceMark rm; | |
4211 | |
4212 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); | |
4213 | |
4214 PUTPROP(props, "sun.java.command", Arguments::java_command()); | |
4215 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags()); | |
4216 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args()); | |
4217 return properties; | |
4218 JVM_END | |
4219 | |
4220 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass)) | |
4221 { | |
4222 JVMWrapper("JVM_GetEnclosingMethodInfo"); | |
4223 JvmtiVMObjectAllocEventCollector oam; | |
4224 | |
4225 if (ofClass == NULL) { | |
4226 return NULL; | |
4227 } | |
4228 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass)); | |
4229 // Special handling for primitive objects | |
4230 if (java_lang_Class::is_primitive(mirror())) { | |
4231 return NULL; | |
4232 } | |
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4233 Klass* k = java_lang_Class::as_Klass(mirror()); |
6983 | 4234 if (!k->oop_is_instance()) { |
0 | 4235 return NULL; |
4236 } | |
4237 instanceKlassHandle ik_h(THREAD, k); | |
4238 int encl_method_class_idx = ik_h->enclosing_method_class_index(); | |
4239 if (encl_method_class_idx == 0) { | |
4240 return NULL; | |
4241 } | |
1142 | 4242 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL); |
0 | 4243 objArrayHandle dest(THREAD, dest_o); |
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4244 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL); |
6983 | 4245 dest->obj_at_put(0, enc_k->java_mirror()); |
0 | 4246 int encl_method_method_idx = ik_h->enclosing_method_method_index(); |
4247 if (encl_method_method_idx != 0) { | |
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4248 Symbol* sym = ik_h->constants()->symbol_at( |
0 | 4249 extract_low_short_from_int( |
4250 ik_h->constants()->name_and_type_at(encl_method_method_idx))); | |
4251 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); | |
4252 dest->obj_at_put(1, str()); | |
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4253 sym = ik_h->constants()->symbol_at( |
0 | 4254 extract_high_short_from_int( |
4255 ik_h->constants()->name_and_type_at(encl_method_method_idx))); | |
4256 str = java_lang_String::create_from_symbol(sym, CHECK_NULL); | |
4257 dest->obj_at_put(2, str()); | |
4258 } | |
4259 return (jobjectArray) JNIHandles::make_local(dest()); | |
4260 } | |
4261 JVM_END | |
4262 | |
4263 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env, | |
4264 jint javaThreadState)) | |
4265 { | |
4266 // If new thread states are added in future JDK and VM versions, | |
4267 // this should check if the JDK version is compatible with thread | |
4268 // states supported by the VM. Return NULL if not compatible. | |
4269 // | |
4270 // This function must map the VM java_lang_Thread::ThreadStatus | |
4271 // to the Java thread state that the JDK supports. | |
4272 // | |
4273 | |
4274 typeArrayHandle values_h; | |
4275 switch (javaThreadState) { | |
4276 case JAVA_THREAD_STATE_NEW : { | |
4277 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4278 values_h = typeArrayHandle(THREAD, r); | |
4279 values_h->int_at_put(0, java_lang_Thread::NEW); | |
4280 break; | |
4281 } | |
4282 case JAVA_THREAD_STATE_RUNNABLE : { | |
4283 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4284 values_h = typeArrayHandle(THREAD, r); | |
4285 values_h->int_at_put(0, java_lang_Thread::RUNNABLE); | |
4286 break; | |
4287 } | |
4288 case JAVA_THREAD_STATE_BLOCKED : { | |
4289 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4290 values_h = typeArrayHandle(THREAD, r); | |
4291 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); | |
4292 break; | |
4293 } | |
4294 case JAVA_THREAD_STATE_WAITING : { | |
4295 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL); | |
4296 values_h = typeArrayHandle(THREAD, r); | |
4297 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT); | |
4298 values_h->int_at_put(1, java_lang_Thread::PARKED); | |
4299 break; | |
4300 } | |
4301 case JAVA_THREAD_STATE_TIMED_WAITING : { | |
4302 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL); | |
4303 values_h = typeArrayHandle(THREAD, r); | |
4304 values_h->int_at_put(0, java_lang_Thread::SLEEPING); | |
4305 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED); | |
4306 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED); | |
4307 break; | |
4308 } | |
4309 case JAVA_THREAD_STATE_TERMINATED : { | |
4310 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4311 values_h = typeArrayHandle(THREAD, r); | |
4312 values_h->int_at_put(0, java_lang_Thread::TERMINATED); | |
4313 break; | |
4314 } | |
4315 default: | |
4316 // Unknown state - probably incompatible JDK version | |
4317 return NULL; | |
4318 } | |
4319 | |
4320 return (jintArray) JNIHandles::make_local(env, values_h()); | |
4321 } | |
4322 JVM_END | |
4323 | |
4324 | |
4325 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env, | |
4326 jint javaThreadState, | |
4327 jintArray values)) | |
4328 { | |
4329 // If new thread states are added in future JDK and VM versions, | |
4330 // this should check if the JDK version is compatible with thread | |
4331 // states supported by the VM. Return NULL if not compatible. | |
4332 // | |
4333 // This function must map the VM java_lang_Thread::ThreadStatus | |
4334 // to the Java thread state that the JDK supports. | |
4335 // | |
4336 | |
4337 ResourceMark rm; | |
4338 | |
4339 // Check if threads is null | |
4340 if (values == NULL) { | |
4341 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
4342 } | |
4343 | |
4344 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values)); | |
4345 typeArrayHandle values_h(THREAD, v); | |
4346 | |
4347 objArrayHandle names_h; | |
4348 switch (javaThreadState) { | |
4349 case JAVA_THREAD_STATE_NEW : { | |
4350 assert(values_h->length() == 1 && | |
4351 values_h->int_at(0) == java_lang_Thread::NEW, | |
4352 "Invalid threadStatus value"); | |
4353 | |
1142 | 4354 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4355 1, /* only 1 substate */ |
4356 CHECK_NULL); | |
4357 names_h = objArrayHandle(THREAD, r); | |
4358 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL); | |
4359 names_h->obj_at_put(0, name()); | |
4360 break; | |
4361 } | |
4362 case JAVA_THREAD_STATE_RUNNABLE : { | |
4363 assert(values_h->length() == 1 && | |
4364 values_h->int_at(0) == java_lang_Thread::RUNNABLE, | |
4365 "Invalid threadStatus value"); | |
4366 | |
1142 | 4367 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4368 1, /* only 1 substate */ |
4369 CHECK_NULL); | |
4370 names_h = objArrayHandle(THREAD, r); | |
4371 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL); | |
4372 names_h->obj_at_put(0, name()); | |
4373 break; | |
4374 } | |
4375 case JAVA_THREAD_STATE_BLOCKED : { | |
4376 assert(values_h->length() == 1 && | |
4377 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER, | |
4378 "Invalid threadStatus value"); | |
4379 | |
1142 | 4380 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4381 1, /* only 1 substate */ |
4382 CHECK_NULL); | |
4383 names_h = objArrayHandle(THREAD, r); | |
4384 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL); | |
4385 names_h->obj_at_put(0, name()); | |
4386 break; | |
4387 } | |
4388 case JAVA_THREAD_STATE_WAITING : { | |
4389 assert(values_h->length() == 2 && | |
4390 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT && | |
4391 values_h->int_at(1) == java_lang_Thread::PARKED, | |
4392 "Invalid threadStatus value"); | |
1142 | 4393 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4394 2, /* number of substates */ |
4395 CHECK_NULL); | |
4396 names_h = objArrayHandle(THREAD, r); | |
4397 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT", | |
4398 CHECK_NULL); | |
4399 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED", | |
4400 CHECK_NULL); | |
4401 names_h->obj_at_put(0, name0()); | |
4402 names_h->obj_at_put(1, name1()); | |
4403 break; | |
4404 } | |
4405 case JAVA_THREAD_STATE_TIMED_WAITING : { | |
4406 assert(values_h->length() == 3 && | |
4407 values_h->int_at(0) == java_lang_Thread::SLEEPING && | |
4408 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED && | |
4409 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED, | |
4410 "Invalid threadStatus value"); | |
1142 | 4411 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4412 3, /* number of substates */ |
4413 CHECK_NULL); | |
4414 names_h = objArrayHandle(THREAD, r); | |
4415 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING", | |
4416 CHECK_NULL); | |
4417 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT", | |
4418 CHECK_NULL); | |
4419 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED", | |
4420 CHECK_NULL); | |
4421 names_h->obj_at_put(0, name0()); | |
4422 names_h->obj_at_put(1, name1()); | |
4423 names_h->obj_at_put(2, name2()); | |
4424 break; | |
4425 } | |
4426 case JAVA_THREAD_STATE_TERMINATED : { | |
4427 assert(values_h->length() == 1 && | |
4428 values_h->int_at(0) == java_lang_Thread::TERMINATED, | |
4429 "Invalid threadStatus value"); | |
1142 | 4430 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4431 1, /* only 1 substate */ |
4432 CHECK_NULL); | |
4433 names_h = objArrayHandle(THREAD, r); | |
4434 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL); | |
4435 names_h->obj_at_put(0, name()); | |
4436 break; | |
4437 } | |
4438 default: | |
4439 // Unknown state - probably incompatible JDK version | |
4440 return NULL; | |
4441 } | |
4442 return (jobjectArray) JNIHandles::make_local(env, names_h()); | |
4443 } | |
4444 JVM_END | |
4445 | |
4446 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size)) | |
4447 { | |
4448 memset(info, 0, sizeof(info_size)); | |
4449 | |
4450 info->jvm_version = Abstract_VM_Version::jvm_version(); | |
4451 info->update_version = 0; /* 0 in HotSpot Express VM */ | |
4452 info->special_update_version = 0; /* 0 in HotSpot Express VM */ | |
4453 | |
4454 // when we add a new capability in the jvm_version_info struct, we should also | |
4455 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat | |
4456 // counter defined in runtimeService.cpp. | |
4457 info->is_attachable = AttachListener::is_attach_supported(); | |
4458 } | |
4459 JVM_END |