Mercurial > hg > truffle
annotate src/share/vm/prims/jvm.cpp @ 18052:2373a1f4987c
8036533: Method for correct defaults
8036156: Limit default method hierarchy
Summary: Fix protected access checks
Reviewed-by: coleenp, lfoltan, acorn, ahgross
author | hseigel |
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date | Fri, 09 May 2014 15:21:20 -0400 |
parents | 21444610cb92 |
children | 54bc75c144b0 |
rev | line source |
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0 | 1 /* |
18051 | 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" | |
31 #include "classfile/vmSymbols.hpp" | |
32 #include "gc_interface/collectedHeap.inline.hpp" | |
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33 #include "interpreter/bytecode.hpp" |
1972 | 34 #include "memory/oopFactory.hpp" |
35 #include "memory/universe.inline.hpp" | |
3938 | 36 #include "oops/fieldStreams.hpp" |
1972 | 37 #include "oops/instanceKlass.hpp" |
38 #include "oops/objArrayKlass.hpp" | |
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39 #include "oops/method.hpp" |
1972 | 40 #include "prims/jvm.h" |
41 #include "prims/jvm_misc.hpp" | |
42 #include "prims/jvmtiExport.hpp" | |
43 #include "prims/jvmtiThreadState.hpp" | |
44 #include "prims/nativeLookup.hpp" | |
45 #include "prims/privilegedStack.hpp" | |
46 #include "runtime/arguments.hpp" | |
47 #include "runtime/dtraceJSDT.hpp" | |
48 #include "runtime/handles.inline.hpp" | |
49 #include "runtime/init.hpp" | |
50 #include "runtime/interfaceSupport.hpp" | |
51 #include "runtime/java.hpp" | |
52 #include "runtime/javaCalls.hpp" | |
53 #include "runtime/jfieldIDWorkaround.hpp" | |
54 #include "runtime/os.hpp" | |
55 #include "runtime/perfData.hpp" | |
56 #include "runtime/reflection.hpp" | |
57 #include "runtime/vframe.hpp" | |
58 #include "runtime/vm_operations.hpp" | |
59 #include "services/attachListener.hpp" | |
60 #include "services/management.hpp" | |
61 #include "services/threadService.hpp" | |
10405 | 62 #include "trace/tracing.hpp" |
1972 | 63 #include "utilities/copy.hpp" |
64 #include "utilities/defaultStream.hpp" | |
65 #include "utilities/dtrace.hpp" | |
66 #include "utilities/events.hpp" | |
67 #include "utilities/histogram.hpp" | |
68 #include "utilities/top.hpp" | |
69 #include "utilities/utf8.hpp" | |
70 #ifdef TARGET_OS_FAMILY_linux | |
71 # include "jvm_linux.h" | |
72 #endif | |
73 #ifdef TARGET_OS_FAMILY_solaris | |
74 # include "jvm_solaris.h" | |
75 #endif | |
76 #ifdef TARGET_OS_FAMILY_windows | |
77 # include "jvm_windows.h" | |
78 #endif | |
3960 | 79 #ifdef TARGET_OS_FAMILY_bsd |
80 # include "jvm_bsd.h" | |
81 #endif | |
1972 | 82 |
0 | 83 #include <errno.h> |
84 | |
4006 | 85 #ifndef USDT2 |
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86 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long); |
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87 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int); |
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88 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield); |
4006 | 89 #endif /* !USDT2 */ |
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90 |
0 | 91 /* |
92 NOTE about use of any ctor or function call that can trigger a safepoint/GC: | |
93 such ctors and calls MUST NOT come between an oop declaration/init and its | |
94 usage because if objects are move this may cause various memory stomps, bus | |
95 errors and segfaults. Here is a cookbook for causing so called "naked oop | |
96 failures": | |
97 | |
98 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> { | |
99 JVMWrapper("JVM_GetClassDeclaredFields"); | |
100 | |
101 // Object address to be held directly in mirror & not visible to GC | |
102 oop mirror = JNIHandles::resolve_non_null(ofClass); | |
103 | |
104 // If this ctor can hit a safepoint, moving objects around, then | |
105 ComplexConstructor foo; | |
106 | |
107 // Boom! mirror may point to JUNK instead of the intended object | |
108 (some dereference of mirror) | |
109 | |
110 // Here's another call that may block for GC, making mirror stale | |
111 MutexLocker ml(some_lock); | |
112 | |
113 // And here's an initializer that can result in a stale oop | |
114 // all in one step. | |
115 oop o = call_that_can_throw_exception(TRAPS); | |
116 | |
117 | |
118 The solution is to keep the oop declaration BELOW the ctor or function | |
119 call that might cause a GC, do another resolve to reassign the oop, or | |
120 consider use of a Handle instead of an oop so there is immunity from object | |
121 motion. But note that the "QUICK" entries below do not have a handlemark | |
122 and thus can only support use of handles passed in. | |
123 */ | |
124 | |
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125 static void trace_class_resolution_impl(Klass* to_class, TRAPS) { |
0 | 126 ResourceMark rm; |
127 int line_number = -1; | |
128 const char * source_file = NULL; | |
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129 const char * trace = "explicit"; |
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130 InstanceKlass* caller = NULL; |
0 | 131 JavaThread* jthread = JavaThread::current(); |
132 if (jthread->has_last_Java_frame()) { | |
133 vframeStream vfst(jthread); | |
134 | |
135 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames | |
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136 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK); |
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137 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK); |
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138 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK); |
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139 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK); |
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140 |
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141 Method* last_caller = NULL; |
0 | 142 |
143 while (!vfst.at_end()) { | |
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144 Method* m = vfst.method(); |
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145 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&& |
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146 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) && |
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147 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) { |
0 | 148 break; |
149 } | |
150 last_caller = m; | |
151 vfst.next(); | |
152 } | |
153 // if this is called from Class.forName0 and that is called from Class.forName, | |
154 // then print the caller of Class.forName. If this is Class.loadClass, then print | |
155 // that caller, otherwise keep quiet since this should be picked up elsewhere. | |
156 bool found_it = false; | |
157 if (!vfst.at_end() && | |
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158 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() && |
0 | 159 vfst.method()->name() == vmSymbols::forName0_name()) { |
160 vfst.next(); | |
161 if (!vfst.at_end() && | |
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162 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() && |
0 | 163 vfst.method()->name() == vmSymbols::forName_name()) { |
164 vfst.next(); | |
165 found_it = true; | |
166 } | |
167 } else if (last_caller != NULL && | |
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168 last_caller->method_holder()->name() == |
0 | 169 vmSymbols::java_lang_ClassLoader() && |
170 (last_caller->name() == vmSymbols::loadClassInternal_name() || | |
171 last_caller->name() == vmSymbols::loadClass_name())) { | |
172 found_it = true; | |
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173 } else if (!vfst.at_end()) { |
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174 if (vfst.method()->is_native()) { |
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175 // JNI call |
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176 found_it = true; |
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177 } |
0 | 178 } |
179 if (found_it && !vfst.at_end()) { | |
180 // found the caller | |
181 caller = vfst.method()->method_holder(); | |
182 line_number = vfst.method()->line_number_from_bci(vfst.bci()); | |
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183 if (line_number == -1) { |
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184 // show method name if it's a native method |
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185 trace = vfst.method()->name_and_sig_as_C_string(); |
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186 } |
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187 Symbol* s = caller->source_file_name(); |
0 | 188 if (s != NULL) { |
189 source_file = s->as_C_string(); | |
190 } | |
191 } | |
192 } | |
193 if (caller != NULL) { | |
194 if (to_class != caller) { | |
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195 const char * from = caller->external_name(); |
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196 const char * to = to_class->external_name(); |
0 | 197 // print in a single call to reduce interleaving between threads |
198 if (source_file != NULL) { | |
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199 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace); |
0 | 200 } else { |
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201 tty->print("RESOLVE %s %s (%s)\n", from, to, trace); |
0 | 202 } |
203 } | |
204 } | |
205 } | |
206 | |
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207 void trace_class_resolution(Klass* to_class) { |
0 | 208 EXCEPTION_MARK; |
209 trace_class_resolution_impl(to_class, THREAD); | |
210 if (HAS_PENDING_EXCEPTION) { | |
211 CLEAR_PENDING_EXCEPTION; | |
212 } | |
213 } | |
214 | |
215 // Wrapper to trace JVM functions | |
216 | |
217 #ifdef ASSERT | |
218 class JVMTraceWrapper : public StackObj { | |
219 public: | |
220 JVMTraceWrapper(const char* format, ...) { | |
221 if (TraceJVMCalls) { | |
222 va_list ap; | |
223 va_start(ap, format); | |
224 tty->print("JVM "); | |
225 tty->vprint_cr(format, ap); | |
226 va_end(ap); | |
227 } | |
228 } | |
229 }; | |
230 | |
231 Histogram* JVMHistogram; | |
232 volatile jint JVMHistogram_lock = 0; | |
233 | |
234 class JVMHistogramElement : public HistogramElement { | |
235 public: | |
236 JVMHistogramElement(const char* name); | |
237 }; | |
238 | |
239 JVMHistogramElement::JVMHistogramElement(const char* elementName) { | |
240 _name = elementName; | |
241 uintx count = 0; | |
242 | |
243 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) { | |
244 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) { | |
245 count +=1; | |
246 if ( (WarnOnStalledSpinLock > 0) | |
247 && (count % WarnOnStalledSpinLock == 0)) { | |
248 warning("JVMHistogram_lock seems to be stalled"); | |
249 } | |
250 } | |
251 } | |
252 | |
253 if(JVMHistogram == NULL) | |
254 JVMHistogram = new Histogram("JVM Call Counts",100); | |
255 | |
256 JVMHistogram->add_element(this); | |
257 Atomic::dec(&JVMHistogram_lock); | |
258 } | |
259 | |
260 #define JVMCountWrapper(arg) \ | |
261 static JVMHistogramElement* e = new JVMHistogramElement(arg); \ | |
262 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen! | |
263 | |
264 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1) | |
265 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2) | |
266 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3) | |
267 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4) | |
268 #else | |
269 #define JVMWrapper(arg1) | |
270 #define JVMWrapper2(arg1, arg2) | |
271 #define JVMWrapper3(arg1, arg2, arg3) | |
272 #define JVMWrapper4(arg1, arg2, arg3, arg4) | |
273 #endif | |
274 | |
275 | |
276 // Interface version ///////////////////////////////////////////////////////////////////// | |
277 | |
278 | |
279 JVM_LEAF(jint, JVM_GetInterfaceVersion()) | |
280 return JVM_INTERFACE_VERSION; | |
281 JVM_END | |
282 | |
283 | |
284 // java.lang.System ////////////////////////////////////////////////////////////////////// | |
285 | |
286 | |
287 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored)) | |
288 JVMWrapper("JVM_CurrentTimeMillis"); | |
289 return os::javaTimeMillis(); | |
290 JVM_END | |
291 | |
292 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored)) | |
293 JVMWrapper("JVM_NanoTime"); | |
294 return os::javaTimeNanos(); | |
295 JVM_END | |
296 | |
297 | |
298 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos, | |
299 jobject dst, jint dst_pos, jint length)) | |
300 JVMWrapper("JVM_ArrayCopy"); | |
301 // Check if we have null pointers | |
302 if (src == NULL || dst == NULL) { | |
303 THROW(vmSymbols::java_lang_NullPointerException()); | |
304 } | |
305 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src)); | |
306 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst)); | |
307 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop"); | |
308 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop"); | |
309 // Do copy | |
6983 | 310 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread); |
0 | 311 JVM_END |
312 | |
313 | |
314 static void set_property(Handle props, const char* key, const char* value, TRAPS) { | |
315 JavaValue r(T_OBJECT); | |
316 // public synchronized Object put(Object key, Object value); | |
317 HandleMark hm(THREAD); | |
318 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK); | |
319 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK); | |
320 JavaCalls::call_virtual(&r, | |
321 props, | |
1142 | 322 KlassHandle(THREAD, SystemDictionary::Properties_klass()), |
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323 vmSymbols::put_name(), |
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324 vmSymbols::object_object_object_signature(), |
0 | 325 key_str, |
326 value_str, | |
327 THREAD); | |
328 } | |
329 | |
330 | |
331 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties)); | |
332 | |
333 | |
334 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties)) | |
335 JVMWrapper("JVM_InitProperties"); | |
336 ResourceMark rm; | |
337 | |
338 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); | |
339 | |
340 // System property list includes both user set via -D option and | |
341 // jvm system specific properties. | |
342 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { | |
343 PUTPROP(props, p->key(), p->value()); | |
344 } | |
345 | |
346 // Convert the -XX:MaxDirectMemorySize= command line flag | |
347 // to the sun.nio.MaxDirectMemorySize property. | |
348 // Do this after setting user properties to prevent people | |
349 // from setting the value with a -D option, as requested. | |
350 { | |
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351 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) { |
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352 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1"); |
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353 } else { |
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354 char as_chars[256]; |
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355 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize); |
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356 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars); |
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357 } |
0 | 358 } |
359 | |
360 // JVM monitoring and management support | |
361 // Add the sun.management.compiler property for the compiler's name | |
362 { | |
363 #undef CSIZE | |
364 #if defined(_LP64) || defined(_WIN64) | |
365 #define CSIZE "64-Bit " | |
366 #else | |
367 #define CSIZE | |
368 #endif // 64bit | |
369 | |
370 #ifdef TIERED | |
371 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers"; | |
372 #else | |
373 #if defined(COMPILER1) | |
374 const char* compiler_name = "HotSpot " CSIZE "Client Compiler"; | |
375 #elif defined(COMPILER2) | |
376 const char* compiler_name = "HotSpot " CSIZE "Server Compiler"; | |
377 #else | |
378 const char* compiler_name = ""; | |
379 #endif // compilers | |
380 #endif // TIERED | |
381 | |
382 if (*compiler_name != '\0' && | |
383 (Arguments::mode() != Arguments::_int)) { | |
384 PUTPROP(props, "sun.management.compiler", compiler_name); | |
385 } | |
386 } | |
387 | |
388 return properties; | |
389 JVM_END | |
390 | |
391 | |
392 // java.lang.Runtime ///////////////////////////////////////////////////////////////////////// | |
393 | |
394 extern volatile jint vm_created; | |
395 | |
396 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code)) | |
397 if (vm_created != 0 && (code == 0)) { | |
398 // The VM is about to exit. We call back into Java to check whether finalizers should be run | |
399 Universe::run_finalizers_on_exit(); | |
400 } | |
401 before_exit(thread); | |
402 vm_exit(code); | |
403 JVM_END | |
404 | |
405 | |
406 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code)) | |
407 before_exit(thread); | |
408 vm_exit(code); | |
409 JVM_END | |
410 | |
411 | |
412 JVM_LEAF(void, JVM_OnExit(void (*func)(void))) | |
413 register_on_exit_function(func); | |
414 JVM_END | |
415 | |
416 | |
417 JVM_ENTRY_NO_ENV(void, JVM_GC(void)) | |
418 JVMWrapper("JVM_GC"); | |
419 if (!DisableExplicitGC) { | |
420 Universe::heap()->collect(GCCause::_java_lang_system_gc); | |
421 } | |
422 JVM_END | |
423 | |
424 | |
425 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void)) | |
426 JVMWrapper("JVM_MaxObjectInspectionAge"); | |
427 return Universe::heap()->millis_since_last_gc(); | |
428 JVM_END | |
429 | |
430 | |
431 JVM_LEAF(void, JVM_TraceInstructions(jboolean on)) | |
432 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported"); | |
433 JVM_END | |
434 | |
435 | |
436 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on)) | |
437 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported"); | |
438 JVM_END | |
439 | |
440 static inline jlong convert_size_t_to_jlong(size_t val) { | |
441 // In the 64-bit vm, a size_t can overflow a jlong (which is signed). | |
442 NOT_LP64 (return (jlong)val;) | |
443 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);) | |
444 } | |
445 | |
446 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void)) | |
447 JVMWrapper("JVM_TotalMemory"); | |
448 size_t n = Universe::heap()->capacity(); | |
449 return convert_size_t_to_jlong(n); | |
450 JVM_END | |
451 | |
452 | |
453 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void)) | |
454 JVMWrapper("JVM_FreeMemory"); | |
455 CollectedHeap* ch = Universe::heap(); | |
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456 size_t n; |
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457 { |
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458 MutexLocker x(Heap_lock); |
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459 n = ch->capacity() - ch->used(); |
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460 } |
0 | 461 return convert_size_t_to_jlong(n); |
462 JVM_END | |
463 | |
464 | |
465 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void)) | |
466 JVMWrapper("JVM_MaxMemory"); | |
467 size_t n = Universe::heap()->max_capacity(); | |
468 return convert_size_t_to_jlong(n); | |
469 JVM_END | |
470 | |
471 | |
472 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void)) | |
473 JVMWrapper("JVM_ActiveProcessorCount"); | |
474 return os::active_processor_count(); | |
475 JVM_END | |
476 | |
477 | |
478 | |
479 // java.lang.Throwable ////////////////////////////////////////////////////// | |
480 | |
481 | |
482 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver)) | |
483 JVMWrapper("JVM_FillInStackTrace"); | |
484 Handle exception(thread, JNIHandles::resolve_non_null(receiver)); | |
485 java_lang_Throwable::fill_in_stack_trace(exception); | |
486 JVM_END | |
487 | |
488 | |
489 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable)) | |
490 JVMWrapper("JVM_GetStackTraceDepth"); | |
491 oop exception = JNIHandles::resolve(throwable); | |
492 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD); | |
493 JVM_END | |
494 | |
495 | |
496 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index)) | |
497 JVMWrapper("JVM_GetStackTraceElement"); | |
498 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC | |
499 oop exception = JNIHandles::resolve(throwable); | |
500 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL); | |
501 return JNIHandles::make_local(env, element); | |
502 JVM_END | |
503 | |
504 | |
505 // java.lang.Object /////////////////////////////////////////////// | |
506 | |
507 | |
508 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle)) | |
509 JVMWrapper("JVM_IHashCode"); | |
510 // as implemented in the classic virtual machine; return 0 if object is NULL | |
511 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ; | |
512 JVM_END | |
513 | |
514 | |
515 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms)) | |
516 JVMWrapper("JVM_MonitorWait"); | |
517 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
518 JavaThreadInObjectWaitState jtiows(thread, ms != 0); | |
519 if (JvmtiExport::should_post_monitor_wait()) { | |
520 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms); | |
521 } | |
522 ObjectSynchronizer::wait(obj, ms, CHECK); | |
523 JVM_END | |
524 | |
525 | |
526 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle)) | |
527 JVMWrapper("JVM_MonitorNotify"); | |
528 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
529 ObjectSynchronizer::notify(obj, CHECK); | |
530 JVM_END | |
531 | |
532 | |
533 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle)) | |
534 JVMWrapper("JVM_MonitorNotifyAll"); | |
535 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
536 ObjectSynchronizer::notifyall(obj, CHECK); | |
537 JVM_END | |
538 | |
539 | |
540 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle)) | |
541 JVMWrapper("JVM_Clone"); | |
542 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
543 const KlassHandle klass (THREAD, obj->klass()); | |
544 JvmtiVMObjectAllocEventCollector oam; | |
545 | |
546 #ifdef ASSERT | |
547 // Just checking that the cloneable flag is set correct | |
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548 if (obj->is_array()) { |
0 | 549 guarantee(klass->is_cloneable(), "all arrays are cloneable"); |
550 } else { | |
551 guarantee(obj->is_instance(), "should be instanceOop"); | |
1142 | 552 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass()); |
0 | 553 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag"); |
554 } | |
555 #endif | |
556 | |
557 // Check if class of obj supports the Cloneable interface. | |
558 // All arrays are considered to be cloneable (See JLS 20.1.5) | |
559 if (!klass->is_cloneable()) { | |
560 ResourceMark rm(THREAD); | |
561 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name()); | |
562 } | |
563 | |
564 // Make shallow object copy | |
565 const int size = obj->size(); | |
566 oop new_obj = NULL; | |
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567 if (obj->is_array()) { |
0 | 568 const int length = ((arrayOop)obj())->length(); |
569 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL); | |
570 } else { | |
571 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL); | |
572 } | |
573 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread | |
574 // is modifying a reference field in the clonee, a non-oop-atomic copy might | |
575 // be suspended in the middle of copying the pointer and end up with parts | |
576 // of two different pointers in the field. Subsequent dereferences will crash. | |
577 // 4846409: an oop-copy of objects with long or double fields or arrays of same | |
578 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead | |
579 // of oops. We know objects are aligned on a minimum of an jlong boundary. | |
580 // The same is true of StubRoutines::object_copy and the various oop_copy | |
581 // variants, and of the code generated by the inline_native_clone intrinsic. | |
582 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned"); | |
583 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj, | |
584 (size_t)align_object_size(size) / HeapWordsPerLong); | |
585 // Clear the header | |
586 new_obj->init_mark(); | |
587 | |
588 // Store check (mark entire object and let gc sort it out) | |
589 BarrierSet* bs = Universe::heap()->barrier_set(); | |
590 assert(bs->has_write_region_opt(), "Barrier set does not have write_region"); | |
591 bs->write_region(MemRegion((HeapWord*)new_obj, size)); | |
592 | |
593 // Caution: this involves a java upcall, so the clone should be | |
594 // "gc-robust" by this stage. | |
595 if (klass->has_finalizer()) { | |
596 assert(obj->is_instance(), "should be instanceOop"); | |
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597 new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL); |
0 | 598 } |
599 | |
600 return JNIHandles::make_local(env, oop(new_obj)); | |
601 JVM_END | |
602 | |
603 // java.lang.Compiler //////////////////////////////////////////////////// | |
604 | |
605 // The initial cuts of the HotSpot VM will not support JITs, and all existing | |
606 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM | |
607 // functions are all silently ignored unless JVM warnings are printed. | |
608 | |
609 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls)) | |
610 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported"); | |
611 JVM_END | |
612 | |
613 | |
614 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls)) | |
615 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported"); | |
616 return JNI_FALSE; | |
617 JVM_END | |
618 | |
619 | |
620 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls)) | |
621 if (PrintJVMWarnings) warning("JVM_CompileClass not supported"); | |
622 return JNI_FALSE; | |
623 JVM_END | |
624 | |
625 | |
626 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname)) | |
627 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported"); | |
628 return JNI_FALSE; | |
629 JVM_END | |
630 | |
631 | |
632 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg)) | |
633 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported"); | |
634 return NULL; | |
635 JVM_END | |
636 | |
637 | |
638 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls)) | |
639 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported"); | |
640 JVM_END | |
641 | |
642 | |
643 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls)) | |
644 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported"); | |
645 JVM_END | |
646 | |
647 | |
648 | |
649 // Error message support ////////////////////////////////////////////////////// | |
650 | |
651 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len)) | |
652 JVMWrapper("JVM_GetLastErrorString"); | |
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653 return (jint)os::lasterror(buf, len); |
0 | 654 JVM_END |
655 | |
656 | |
657 // java.io.File /////////////////////////////////////////////////////////////// | |
658 | |
659 JVM_LEAF(char*, JVM_NativePath(char* path)) | |
660 JVMWrapper2("JVM_NativePath (%s)", path); | |
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661 return os::native_path(path); |
0 | 662 JVM_END |
663 | |
664 | |
665 // Misc. class handling /////////////////////////////////////////////////////////// | |
666 | |
667 | |
668 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth)) | |
669 JVMWrapper("JVM_GetCallerClass"); | |
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670 |
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671 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or |
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672 // sun.reflect.Reflection.getCallerClass with a depth parameter is provided |
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673 // temporarily for existing code to use until a replacement API is defined. |
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674 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) { |
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675 Klass* k = thread->security_get_caller_class(depth); |
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676 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror()); |
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677 } |
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678 |
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679 // Getting the class of the caller frame. |
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680 // |
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681 // The call stack at this point looks something like this: |
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682 // |
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683 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ] |
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684 // [1] [ @CallerSensitive API.method ] |
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685 // [.] [ (skipped intermediate frames) ] |
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686 // [n] [ caller ] |
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687 vframeStream vfst(thread); |
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688 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass |
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689 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) { |
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690 Method* m = vfst.method(); |
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691 assert(m != NULL, "sanity"); |
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692 switch (n) { |
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693 case 0: |
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694 // This must only be called from Reflection.getCallerClass |
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695 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) { |
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696 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass"); |
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697 } |
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698 // fall-through |
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699 case 1: |
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700 // Frame 0 and 1 must be caller sensitive. |
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701 if (!m->caller_sensitive()) { |
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702 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n)); |
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703 } |
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704 break; |
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705 default: |
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706 if (!m->is_ignored_by_security_stack_walk()) { |
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707 // We have reached the desired frame; return the holder class. |
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708 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror()); |
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709 } |
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710 break; |
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711 } |
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712 } |
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713 return NULL; |
0 | 714 JVM_END |
715 | |
716 | |
717 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf)) | |
718 JVMWrapper("JVM_FindPrimitiveClass"); | |
719 oop mirror = NULL; | |
720 BasicType t = name2type(utf); | |
721 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) { | |
722 mirror = Universe::java_mirror(t); | |
723 } | |
724 if (mirror == NULL) { | |
725 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf); | |
726 } else { | |
727 return (jclass) JNIHandles::make_local(env, mirror); | |
728 } | |
729 JVM_END | |
730 | |
731 | |
732 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls)) | |
733 JVMWrapper("JVM_ResolveClass"); | |
734 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented"); | |
735 JVM_END | |
736 | |
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737 |
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738 // Returns a class loaded by the bootstrap class loader; or null |
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739 // if not found. ClassNotFoundException is not thrown. |
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740 // |
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741 // Rationale behind JVM_FindClassFromBootLoader |
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742 // a> JVM_FindClassFromClassLoader was never exported in the export tables. |
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743 // b> because of (a) java.dll has a direct dependecy on the unexported |
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744 // private symbol "_JVM_FindClassFromClassLoader@20". |
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745 // c> the launcher cannot use the private symbol as it dynamically opens |
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746 // the entry point, so if something changes, the launcher will fail |
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747 // unexpectedly at runtime, it is safest for the launcher to dlopen a |
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748 // stable exported interface. |
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749 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its |
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750 // signature to change from _JVM_FindClassFromClassLoader@20 to |
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751 // JVM_FindClassFromClassLoader and will not be backward compatible |
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752 // with older JDKs. |
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753 // Thus a public/stable exported entry point is the right solution, |
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754 // public here means public in linker semantics, and is exported only |
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755 // to the JDK, and is not intended to be a public API. |
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756 |
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757 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env, |
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758 const char* name)) |
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759 JVMWrapper2("JVM_FindClassFromBootLoader %s", name); |
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760 |
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761 // Java libraries should ensure that name is never null... |
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762 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { |
878
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763 // It's impossible to create this class; the name cannot fit |
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764 // into the constant pool. |
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765 return NULL; |
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766 } |
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767 |
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768 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); |
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769 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL); |
878
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770 if (k == NULL) { |
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771 return NULL; |
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772 } |
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773 |
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774 if (TraceClassResolution) { |
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775 trace_class_resolution(k); |
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776 } |
6983 | 777 return (jclass) JNIHandles::make_local(env, k->java_mirror()); |
878
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778 JVM_END |
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779 |
18051 | 780 // Not used; JVM_FindClassFromCaller replaces this. |
878
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781 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name, |
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782 jboolean init, jobject loader, |
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783 jboolean throwError)) |
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784 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name, |
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785 throwError ? "error" : "exception"); |
388 | 786 // Java libraries should ensure that name is never null... |
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787 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { |
388 | 788 // It's impossible to create this class; the name cannot fit |
789 // into the constant pool. | |
790 if (throwError) { | |
791 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
792 } else { | |
793 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name); | |
794 } | |
795 } | |
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796 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); |
388 | 797 Handle h_loader(THREAD, JNIHandles::resolve(loader)); |
798 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, | |
799 Handle(), throwError, THREAD); | |
800 | |
801 if (TraceClassResolution && result != NULL) { | |
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802 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); |
388 | 803 } |
804 return result; | |
0 | 805 JVM_END |
806 | |
18051 | 807 // Find a class with this name in this loader, using the caller's protection domain. |
808 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name, | |
809 jboolean init, jobject loader, | |
810 jclass caller)) | |
811 JVMWrapper2("JVM_FindClassFromCaller %s throws ClassNotFoundException", name); | |
812 // Java libraries should ensure that name is never null... | |
813 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { | |
814 // It's impossible to create this class; the name cannot fit | |
815 // into the constant pool. | |
816 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name); | |
817 } | |
818 | |
819 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); | |
820 | |
821 oop loader_oop = JNIHandles::resolve(loader); | |
822 oop from_class = JNIHandles::resolve(caller); | |
823 oop protection_domain = NULL; | |
824 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get | |
825 // NPE. Put it in another way, the bootstrap class loader has all permission and | |
826 // thus no checkPackageAccess equivalence in the VM class loader. | |
827 // The caller is also passed as NULL by the java code if there is no security | |
828 // manager to avoid the performance cost of getting the calling class. | |
829 if (from_class != NULL && loader_oop != NULL) { | |
830 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain(); | |
831 } | |
832 | |
833 Handle h_loader(THREAD, loader_oop); | |
834 Handle h_prot(THREAD, protection_domain); | |
835 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, | |
836 h_prot, false, THREAD); | |
837 | |
838 if (TraceClassResolution && result != NULL) { | |
839 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); | |
840 } | |
841 return result; | |
842 JVM_END | |
0 | 843 |
844 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name, | |
845 jboolean init, jclass from)) | |
846 JVMWrapper2("JVM_FindClassFromClass %s", name); | |
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847 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { |
0 | 848 // It's impossible to create this class; the name cannot fit |
849 // into the constant pool. | |
850 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
851 } | |
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852 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); |
0 | 853 oop from_class_oop = JNIHandles::resolve(from); |
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854 Klass* from_class = (from_class_oop == NULL) |
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855 ? (Klass*)NULL |
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856 : java_lang_Class::as_Klass(from_class_oop); |
0 | 857 oop class_loader = NULL; |
858 oop protection_domain = NULL; | |
859 if (from_class != NULL) { | |
6983 | 860 class_loader = from_class->class_loader(); |
861 protection_domain = from_class->protection_domain(); | |
0 | 862 } |
863 Handle h_loader(THREAD, class_loader); | |
864 Handle h_prot (THREAD, protection_domain); | |
865 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, | |
866 h_prot, true, thread); | |
867 | |
868 if (TraceClassResolution && result != NULL) { | |
869 // this function is generally only used for class loading during verification. | |
870 ResourceMark rm; | |
871 oop from_mirror = JNIHandles::resolve_non_null(from); | |
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872 Klass* from_class = java_lang_Class::as_Klass(from_mirror); |
6983 | 873 const char * from_name = from_class->external_name(); |
0 | 874 |
875 oop mirror = JNIHandles::resolve_non_null(result); | |
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876 Klass* to_class = java_lang_Class::as_Klass(mirror); |
6983 | 877 const char * to = to_class->external_name(); |
0 | 878 tty->print("RESOLVE %s %s (verification)\n", from_name, to); |
879 } | |
880 | |
881 return result; | |
882 JVM_END | |
883 | |
884 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) { | |
885 if (loader.is_null()) { | |
886 return; | |
887 } | |
888 | |
889 // check whether the current caller thread holds the lock or not. | |
890 // If not, increment the corresponding counter | |
891 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) != | |
892 ObjectSynchronizer::owner_self) { | |
893 counter->inc(); | |
894 } | |
895 } | |
896 | |
897 // common code for JVM_DefineClass() and JVM_DefineClassWithSource() | |
973
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898 // and JVM_DefineClassWithSourceCond() |
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899 static jclass jvm_define_class_common(JNIEnv *env, const char *name, |
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900 jobject loader, const jbyte *buf, |
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901 jsize len, jobject pd, const char *source, |
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902 jboolean verify, TRAPS) { |
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903 if (source == NULL) source = "__JVM_DefineClass__"; |
0 | 904 |
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905 assert(THREAD->is_Java_thread(), "must be a JavaThread"); |
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906 JavaThread* jt = (JavaThread*) THREAD; |
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907 |
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908 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(), |
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909 ClassLoader::perf_define_appclass_selftime(), |
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910 ClassLoader::perf_define_appclasses(), |
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911 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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912 jt->get_thread_stat()->perf_timers_addr(), |
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913 PerfClassTraceTime::DEFINE_CLASS); |
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914 |
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915 if (UsePerfData) { |
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916 ClassLoader::perf_app_classfile_bytes_read()->inc(len); |
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917 } |
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918 |
0 | 919 // Since exceptions can be thrown, class initialization can take place |
920 // if name is NULL no check for class name in .class stream has to be made. | |
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921 TempNewSymbol class_name = NULL; |
0 | 922 if (name != NULL) { |
923 const int str_len = (int)strlen(name); | |
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924 if (str_len > Symbol::max_length()) { |
0 | 925 // It's impossible to create this class; the name cannot fit |
926 // into the constant pool. | |
927 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
928 } | |
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929 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL); |
0 | 930 } |
931 | |
932 ResourceMark rm(THREAD); | |
933 ClassFileStream st((u1*) buf, len, (char *)source); | |
934 Handle class_loader (THREAD, JNIHandles::resolve(loader)); | |
935 if (UsePerfData) { | |
936 is_lock_held_by_thread(class_loader, | |
937 ClassLoader::sync_JVMDefineClassLockFreeCounter(), | |
938 THREAD); | |
939 } | |
940 Handle protection_domain (THREAD, JNIHandles::resolve(pd)); | |
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941 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader, |
0 | 942 protection_domain, &st, |
973
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943 verify != 0, |
0 | 944 CHECK_NULL); |
945 | |
946 if (TraceClassResolution && k != NULL) { | |
947 trace_class_resolution(k); | |
948 } | |
949 | |
6983 | 950 return (jclass) JNIHandles::make_local(env, k->java_mirror()); |
0 | 951 } |
952 | |
953 | |
954 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd)) | |
955 JVMWrapper2("JVM_DefineClass %s", name); | |
956 | |
973
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957 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD); |
0 | 958 JVM_END |
959 | |
960 | |
961 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source)) | |
962 JVMWrapper2("JVM_DefineClassWithSource %s", name); | |
963 | |
973
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964 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD); |
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965 JVM_END |
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966 |
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967 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name, |
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968 jobject loader, const jbyte *buf, |
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969 jsize len, jobject pd, |
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970 const char *source, jboolean verify)) |
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971 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name); |
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972 |
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973 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD); |
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974 JVM_END |
0 | 975 |
976 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name)) | |
977 JVMWrapper("JVM_FindLoadedClass"); | |
978 ResourceMark rm(THREAD); | |
979 | |
980 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); | |
981 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL); | |
982 | |
983 const char* str = java_lang_String::as_utf8_string(string()); | |
984 // Sanity check, don't expect null | |
985 if (str == NULL) return NULL; | |
986 | |
987 const int str_len = (int)strlen(str); | |
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988 if (str_len > Symbol::max_length()) { |
0 | 989 // It's impossible to create this class; the name cannot fit |
990 // into the constant pool. | |
991 return NULL; | |
992 } | |
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993 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL); |
0 | 994 |
995 // Security Note: | |
996 // The Java level wrapper will perform the necessary security check allowing | |
997 // us to pass the NULL as the initiating class loader. | |
998 Handle h_loader(THREAD, JNIHandles::resolve(loader)); | |
999 if (UsePerfData) { | |
1000 is_lock_held_by_thread(h_loader, | |
1001 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(), | |
1002 THREAD); | |
1003 } | |
1004 | |
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1005 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name, |
0 | 1006 h_loader, |
1007 Handle(), | |
1008 CHECK_NULL); | |
1009 | |
1010 return (k == NULL) ? NULL : | |
6983 | 1011 (jclass) JNIHandles::make_local(env, k->java_mirror()); |
0 | 1012 JVM_END |
1013 | |
1014 | |
1015 // Reflection support ////////////////////////////////////////////////////////////////////////////// | |
1016 | |
1017 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls)) | |
1018 assert (cls != NULL, "illegal class"); | |
1019 JVMWrapper("JVM_GetClassName"); | |
1020 JvmtiVMObjectAllocEventCollector oam; | |
1021 ResourceMark rm(THREAD); | |
1022 const char* name; | |
1023 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
1024 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls))); | |
1025 } else { | |
1026 // Consider caching interned string in Klass | |
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1027 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); |
0 | 1028 assert(k->is_klass(), "just checking"); |
6983 | 1029 name = k->external_name(); |
0 | 1030 } |
1031 oop result = StringTable::intern((char*) name, CHECK_NULL); | |
1032 return (jstring) JNIHandles::make_local(env, result); | |
1033 JVM_END | |
1034 | |
1035 | |
1036 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls)) | |
1037 JVMWrapper("JVM_GetClassInterfaces"); | |
1038 JvmtiVMObjectAllocEventCollector oam; | |
1039 oop mirror = JNIHandles::resolve_non_null(cls); | |
1040 | |
1041 // Special handling for primitive objects | |
1042 if (java_lang_Class::is_primitive(mirror)) { | |
1043 // Primitive objects does not have any interfaces | |
1142 | 1044 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); |
0 | 1045 return (jobjectArray) JNIHandles::make_local(env, r); |
1046 } | |
1047 | |
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1048 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror)); |
0 | 1049 // Figure size of result array |
1050 int size; | |
1051 if (klass->oop_is_instance()) { | |
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1052 size = InstanceKlass::cast(klass())->local_interfaces()->length(); |
0 | 1053 } else { |
1054 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass"); | |
1055 size = 2; | |
1056 } | |
1057 | |
1058 // Allocate result array | |
1142 | 1059 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL); |
0 | 1060 objArrayHandle result (THREAD, r); |
1061 // Fill in result | |
1062 if (klass->oop_is_instance()) { | |
1063 // Regular instance klass, fill in all local interfaces | |
1064 for (int index = 0; index < size; index++) { | |
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1065 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index); |
6983 | 1066 result->obj_at_put(index, k->java_mirror()); |
0 | 1067 } |
1068 } else { | |
1069 // All arrays implement java.lang.Cloneable and java.io.Serializable | |
6983 | 1070 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror()); |
1071 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror()); | |
0 | 1072 } |
1073 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1074 JVM_END | |
1075 | |
1076 | |
1077 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls)) | |
1078 JVMWrapper("JVM_GetClassLoader"); | |
1079 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1080 return NULL; | |
1081 } | |
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1082 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
6983 | 1083 oop loader = k->class_loader(); |
0 | 1084 return JNIHandles::make_local(env, loader); |
1085 JVM_END | |
1086 | |
1087 | |
1088 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls)) | |
1089 JVMWrapper("JVM_IsInterface"); | |
1090 oop mirror = JNIHandles::resolve_non_null(cls); | |
1091 if (java_lang_Class::is_primitive(mirror)) { | |
1092 return JNI_FALSE; | |
1093 } | |
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1094 Klass* k = java_lang_Class::as_Klass(mirror); |
6983 | 1095 jboolean result = k->is_interface(); |
1096 assert(!result || k->oop_is_instance(), | |
0 | 1097 "all interfaces are instance types"); |
1098 // The compiler intrinsic for isInterface tests the | |
1099 // Klass::_access_flags bits in the same way. | |
1100 return result; | |
1101 JVM_END | |
1102 | |
1103 | |
1104 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls)) | |
1105 JVMWrapper("JVM_GetClassSigners"); | |
1106 JvmtiVMObjectAllocEventCollector oam; | |
1107 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1108 // There are no signers for primitive types | |
1109 return NULL; | |
1110 } | |
1111 | |
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1112 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls)); |
0 | 1113 |
1114 // If there are no signers set in the class, or if the class | |
1115 // is an array, return NULL. | |
1116 if (signers == NULL) return NULL; | |
1117 | |
1118 // copy of the signers array | |
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1119 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass(); |
0 | 1120 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL); |
1121 for (int index = 0; index < signers->length(); index++) { | |
1122 signers_copy->obj_at_put(index, signers->obj_at(index)); | |
1123 } | |
1124 | |
1125 // return the copy | |
1126 return (jobjectArray) JNIHandles::make_local(env, signers_copy); | |
1127 JVM_END | |
1128 | |
1129 | |
1130 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers)) | |
1131 JVMWrapper("JVM_SetClassSigners"); | |
1132 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1133 // This call is ignored for primitive types and arrays. | |
1134 // Signers are only set once, ClassLoader.java, and thus shouldn't | |
1135 // be called with an array. Only the bootstrap loader creates arrays. | |
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1136 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
6983 | 1137 if (k->oop_is_instance()) { |
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1138 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers))); |
0 | 1139 } |
1140 } | |
1141 JVM_END | |
1142 | |
1143 | |
1144 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls)) | |
1145 JVMWrapper("JVM_GetProtectionDomain"); | |
1146 if (JNIHandles::resolve(cls) == NULL) { | |
1147 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); | |
1148 } | |
1149 | |
1150 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
1151 // Primitive types does not have a protection domain. | |
1152 return NULL; | |
1153 } | |
1154 | |
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1155 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls)); |
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1156 return (jobject) JNIHandles::make_local(env, pd); |
0 | 1157 JVM_END |
1158 | |
1159 | |
11010 | 1160 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) { |
1161 // If there is a security manager and protection domain, check the access | |
1162 // in the protection domain, otherwise it is authorized. | |
1163 if (java_lang_System::has_security_manager()) { | |
1164 | |
1165 // For bootstrapping, if pd implies method isn't in the JDK, allow | |
1166 // this context to revert to older behavior. | |
1167 // In this case the isAuthorized field in AccessControlContext is also not | |
1168 // present. | |
1169 if (Universe::protection_domain_implies_method() == NULL) { | |
1170 return true; | |
1171 } | |
1172 | |
1173 // Whitelist certain access control contexts | |
1174 if (java_security_AccessControlContext::is_authorized(context)) { | |
1175 return true; | |
1176 } | |
1177 | |
1178 oop prot = klass->protection_domain(); | |
1179 if (prot != NULL) { | |
1180 // Call pd.implies(new SecurityPermission("createAccessControlContext")) | |
1181 // in the new wrapper. | |
1182 methodHandle m(THREAD, Universe::protection_domain_implies_method()); | |
1183 Handle h_prot(THREAD, prot); | |
1184 JavaValue result(T_BOOLEAN); | |
1185 JavaCallArguments args(h_prot); | |
1186 JavaCalls::call(&result, m, &args, CHECK_false); | |
1187 return (result.get_jboolean() != 0); | |
1188 } | |
1189 } | |
1190 return true; | |
1191 } | |
1192 | |
1193 // Create an AccessControlContext with a protection domain with null codesource | |
1194 // and null permissions - which gives no permissions. | |
1195 oop create_dummy_access_control_context(TRAPS) { | |
1196 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass()); | |
1197 // new ProtectionDomain(null,null); | |
1198 oop null_protection_domain = pd_klass->allocate_instance(CHECK_NULL); | |
1199 Handle null_pd(THREAD, null_protection_domain); | |
1200 | |
1201 // new ProtectionDomain[] {pd}; | |
1202 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL); | |
1203 context->obj_at_put(0, null_pd()); | |
1204 | |
1205 // new AccessControlContext(new ProtectionDomain[] {pd}) | |
1206 objArrayHandle h_context(THREAD, context); | |
1207 oop result = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL); | |
1208 return result; | |
1209 } | |
0 | 1210 |
1211 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException)) | |
1212 JVMWrapper("JVM_DoPrivileged"); | |
1213 | |
1214 if (action == NULL) { | |
1215 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action"); | |
1216 } | |
1217 | |
11010 | 1218 // Compute the frame initiating the do privileged operation and setup the privileged stack |
1219 vframeStream vfst(thread); | |
1220 vfst.security_get_caller_frame(1); | |
1221 | |
1222 if (vfst.at_end()) { | |
1223 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?"); | |
1224 } | |
1225 | |
1226 Method* method = vfst.method(); | |
1227 instanceKlassHandle klass (THREAD, method->method_holder()); | |
1228 | |
1229 // Check that action object understands "Object run()" | |
1230 Handle h_context; | |
1231 if (context != NULL) { | |
1232 h_context = Handle(THREAD, JNIHandles::resolve(context)); | |
1233 bool authorized = is_authorized(h_context, klass, CHECK_NULL); | |
1234 if (!authorized) { | |
1235 // Create an unprivileged access control object and call it's run function | |
1236 // instead. | |
1237 oop noprivs = create_dummy_access_control_context(CHECK_NULL); | |
1238 h_context = Handle(THREAD, noprivs); | |
1239 } | |
1240 } | |
0 | 1241 |
1242 // Check that action object understands "Object run()" | |
1243 Handle object (THREAD, JNIHandles::resolve(action)); | |
1244 | |
1245 // get run() method | |
6983 | 1246 Method* m_oop = object->klass()->uncached_lookup_method( |
0 | 1247 vmSymbols::run_method_name(), |
1248 vmSymbols::void_object_signature()); | |
1249 methodHandle m (THREAD, m_oop); | |
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1250 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) { |
0 | 1251 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method"); |
1252 } | |
1253 | |
11010 | 1254 // Stack allocated list of privileged stack elements |
1255 PrivilegedElement pi; | |
0 | 1256 if (!vfst.at_end()) { |
11010 | 1257 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL); |
0 | 1258 thread->set_privileged_stack_top(&pi); |
1259 } | |
1260 | |
1261 | |
1262 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type | |
1263 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction | |
1264 Handle pending_exception; | |
1265 JavaValue result(T_OBJECT); | |
1266 JavaCallArguments args(object); | |
1267 JavaCalls::call(&result, m, &args, THREAD); | |
1268 | |
1269 // done with action, remove ourselves from the list | |
1270 if (!vfst.at_end()) { | |
1271 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element"); | |
1272 thread->set_privileged_stack_top(thread->privileged_stack_top()->next()); | |
1273 } | |
1274 | |
1275 if (HAS_PENDING_EXCEPTION) { | |
1276 pending_exception = Handle(THREAD, PENDING_EXCEPTION); | |
1277 CLEAR_PENDING_EXCEPTION; | |
1278 | |
1142 | 1279 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) && |
1280 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) { | |
0 | 1281 // Throw a java.security.PrivilegedActionException(Exception e) exception |
1282 JavaCallArguments args(pending_exception); | |
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1283 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(), |
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1284 vmSymbols::exception_void_signature(), |
0 | 1285 &args); |
1286 } | |
1287 } | |
1288 | |
1289 if (pending_exception.not_null()) THROW_OOP_0(pending_exception()); | |
1290 return JNIHandles::make_local(env, (oop) result.get_jobject()); | |
1291 JVM_END | |
1292 | |
1293 | |
1294 // Returns the inherited_access_control_context field of the running thread. | |
1295 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls)) | |
1296 JVMWrapper("JVM_GetInheritedAccessControlContext"); | |
1297 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj()); | |
1298 return JNIHandles::make_local(env, result); | |
1299 JVM_END | |
1300 | |
1301 class RegisterArrayForGC { | |
1302 private: | |
1303 JavaThread *_thread; | |
1304 public: | |
1305 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) { | |
1306 _thread = thread; | |
1307 _thread->register_array_for_gc(array); | |
1308 } | |
1309 | |
1310 ~RegisterArrayForGC() { | |
1311 _thread->register_array_for_gc(NULL); | |
1312 } | |
1313 }; | |
1314 | |
1315 | |
1316 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls)) | |
1317 JVMWrapper("JVM_GetStackAccessControlContext"); | |
1318 if (!UsePrivilegedStack) return NULL; | |
1319 | |
1320 ResourceMark rm(THREAD); | |
1321 GrowableArray<oop>* local_array = new GrowableArray<oop>(12); | |
1322 JvmtiVMObjectAllocEventCollector oam; | |
1323 | |
1324 // count the protection domains on the execution stack. We collapse | |
1325 // duplicate consecutive protection domains into a single one, as | |
1326 // well as stopping when we hit a privileged frame. | |
1327 | |
1328 // Use vframeStream to iterate through Java frames | |
1329 vframeStream vfst(thread); | |
1330 | |
1331 oop previous_protection_domain = NULL; | |
1332 Handle privileged_context(thread, NULL); | |
1333 bool is_privileged = false; | |
1334 oop protection_domain = NULL; | |
1335 | |
1336 for(; !vfst.at_end(); vfst.next()) { | |
1337 // get method of frame | |
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1338 Method* method = vfst.method(); |
0 | 1339 intptr_t* frame_id = vfst.frame_id(); |
1340 | |
1341 // check the privileged frames to see if we have a match | |
1342 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) { | |
1343 // this frame is privileged | |
1344 is_privileged = true; | |
1345 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context()); | |
1346 protection_domain = thread->privileged_stack_top()->protection_domain(); | |
1347 } else { | |
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1348 protection_domain = method->method_holder()->protection_domain(); |
0 | 1349 } |
1350 | |
1351 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) { | |
1352 local_array->push(protection_domain); | |
1353 previous_protection_domain = protection_domain; | |
1354 } | |
1355 | |
1356 if (is_privileged) break; | |
1357 } | |
1358 | |
1359 | |
1360 // either all the domains on the stack were system domains, or | |
1361 // we had a privileged system domain | |
1362 if (local_array->is_empty()) { | |
1363 if (is_privileged && privileged_context.is_null()) return NULL; | |
1364 | |
1365 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL); | |
1366 return JNIHandles::make_local(env, result); | |
1367 } | |
1368 | |
1369 // the resource area must be registered in case of a gc | |
1370 RegisterArrayForGC ragc(thread, local_array); | |
1142 | 1371 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(), |
0 | 1372 local_array->length(), CHECK_NULL); |
1373 objArrayHandle h_context(thread, context); | |
1374 for (int index = 0; index < local_array->length(); index++) { | |
1375 h_context->obj_at_put(index, local_array->at(index)); | |
1376 } | |
1377 | |
1378 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL); | |
1379 | |
1380 return JNIHandles::make_local(env, result); | |
1381 JVM_END | |
1382 | |
1383 | |
1384 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls)) | |
1385 JVMWrapper("JVM_IsArrayClass"); | |
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1386 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
6983 | 1387 return (k != NULL) && k->oop_is_array() ? true : false; |
0 | 1388 JVM_END |
1389 | |
1390 | |
1391 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls)) | |
1392 JVMWrapper("JVM_IsPrimitiveClass"); | |
1393 oop mirror = JNIHandles::resolve_non_null(cls); | |
1394 return (jboolean) java_lang_Class::is_primitive(mirror); | |
1395 JVM_END | |
1396 | |
1397 | |
1398 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls)) | |
1399 JVMWrapper("JVM_GetComponentType"); | |
1400 oop mirror = JNIHandles::resolve_non_null(cls); | |
1401 oop result = Reflection::array_component_type(mirror, CHECK_NULL); | |
1402 return (jclass) JNIHandles::make_local(env, result); | |
1403 JVM_END | |
1404 | |
1405 | |
1406 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls)) | |
1407 JVMWrapper("JVM_GetClassModifiers"); | |
1408 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1409 // Primitive type | |
1410 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; | |
1411 } | |
1412 | |
6983 | 1413 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 1414 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0)); |
1415 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK"); | |
1416 return k->modifier_flags(); | |
1417 JVM_END | |
1418 | |
1419 | |
1420 // Inner class reflection /////////////////////////////////////////////////////////////////////////////// | |
1421 | |
1422 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass)) | |
1423 JvmtiVMObjectAllocEventCollector oam; | |
1424 // ofClass is a reference to a java_lang_Class object. The mirror object | |
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1425 // of an InstanceKlass |
0 | 1426 |
1427 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || | |
6983 | 1428 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) { |
1142 | 1429 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); |
0 | 1430 return (jobjectArray)JNIHandles::make_local(env, result); |
1431 } | |
1432 | |
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1433 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); |
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1434 InnerClassesIterator iter(k); |
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1435 |
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1436 if (iter.length() == 0) { |
0 | 1437 // Neither an inner nor outer class |
1142 | 1438 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); |
0 | 1439 return (jobjectArray)JNIHandles::make_local(env, result); |
1440 } | |
1441 | |
1442 // find inner class info | |
1443 constantPoolHandle cp(thread, k->constants()); | |
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1444 int length = iter.length(); |
0 | 1445 |
1446 // Allocate temp. result array | |
1142 | 1447 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL); |
0 | 1448 objArrayHandle result (THREAD, r); |
1449 int members = 0; | |
1450 | |
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1451 for (; !iter.done(); iter.next()) { |
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1452 int ioff = iter.inner_class_info_index(); |
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1453 int ooff = iter.outer_class_info_index(); |
0 | 1454 |
1455 if (ioff != 0 && ooff != 0) { | |
1456 // Check to see if the name matches the class we're looking for | |
1457 // before attempting to find the class. | |
1458 if (cp->klass_name_at_matches(k, ooff)) { | |
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1459 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL); |
0 | 1460 if (outer_klass == k()) { |
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1461 Klass* ik = cp->klass_at(ioff, CHECK_NULL); |
0 | 1462 instanceKlassHandle inner_klass (THREAD, ik); |
1463 | |
1464 // Throws an exception if outer klass has not declared k as | |
1465 // an inner klass | |
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1466 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL); |
0 | 1467 |
1468 result->obj_at_put(members, inner_klass->java_mirror()); | |
1469 members++; | |
1470 } | |
1471 } | |
1472 } | |
1473 } | |
1474 | |
1475 if (members != length) { | |
1476 // Return array of right length | |
1142 | 1477 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL); |
0 | 1478 for(int i = 0; i < members; i++) { |
1479 res->obj_at_put(i, result->obj_at(i)); | |
1480 } | |
1481 return (jobjectArray)JNIHandles::make_local(env, res); | |
1482 } | |
1483 | |
1484 return (jobjectArray)JNIHandles::make_local(env, result()); | |
1485 JVM_END | |
1486 | |
1487 | |
1488 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass)) | |
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1489 { |
0 | 1490 // ofClass is a reference to a java_lang_Class object. |
1491 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || | |
6983 | 1492 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) { |
0 | 1493 return NULL; |
1494 } | |
1495 | |
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1496 bool inner_is_member = false; |
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1497 Klass* outer_klass |
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1498 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)) |
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1499 )->compute_enclosing_class(&inner_is_member, CHECK_NULL); |
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1500 if (outer_klass == NULL) return NULL; // already a top-level class |
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1501 if (!inner_is_member) return NULL; // an anonymous class (inside a method) |
6983 | 1502 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror()); |
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1503 } |
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1504 JVM_END |
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1505 |
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1506 // should be in InstanceKlass.cpp, but is here for historical reasons |
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1507 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k, |
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1508 bool* inner_is_member, |
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1509 TRAPS) { |
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1510 Thread* thread = THREAD; |
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1511 InnerClassesIterator iter(k); |
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1512 if (iter.length() == 0) { |
0 | 1513 // No inner class info => no declaring class |
1514 return NULL; | |
1515 } | |
1516 | |
1517 constantPoolHandle i_cp(thread, k->constants()); | |
1518 | |
1519 bool found = false; | |
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1520 Klass* ok; |
0 | 1521 instanceKlassHandle outer_klass; |
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1522 *inner_is_member = false; |
0 | 1523 |
1524 // Find inner_klass attribute | |
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1525 for (; !iter.done() && !found; iter.next()) { |
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1526 int ioff = iter.inner_class_info_index(); |
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1527 int ooff = iter.outer_class_info_index(); |
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1528 int noff = iter.inner_name_index(); |
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1529 if (ioff != 0) { |
0 | 1530 // Check to see if the name matches the class we're looking for |
1531 // before attempting to find the class. | |
1532 if (i_cp->klass_name_at_matches(k, ioff)) { | |
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1533 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL); |
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1534 found = (k() == inner_klass); |
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1535 if (found && ooff != 0) { |
0 | 1536 ok = i_cp->klass_at(ooff, CHECK_NULL); |
1537 outer_klass = instanceKlassHandle(thread, ok); | |
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1538 *inner_is_member = true; |
0 | 1539 } |
1540 } | |
1541 } | |
1542 } | |
1543 | |
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1544 if (found && outer_klass.is_null()) { |
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1545 // It may be anonymous; try for that. |
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1546 int encl_method_class_idx = k->enclosing_method_class_index(); |
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1547 if (encl_method_class_idx != 0) { |
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1548 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL); |
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1549 outer_klass = instanceKlassHandle(thread, ok); |
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1550 *inner_is_member = false; |
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1551 } |
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1552 } |
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1553 |
0 | 1554 // If no inner class attribute found for this class. |
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1555 if (outer_klass.is_null()) return NULL; |
0 | 1556 |
1557 // Throws an exception if outer klass has not declared k as an inner klass | |
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1558 // We need evidence that each klass knows about the other, or else |
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1559 // the system could allow a spoof of an inner class to gain access rights. |
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1560 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL); |
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1561 return outer_klass(); |
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1562 } |
0 | 1563 |
1564 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls)) | |
1565 assert (cls != NULL, "illegal class"); | |
1566 JVMWrapper("JVM_GetClassSignature"); | |
1567 JvmtiVMObjectAllocEventCollector oam; | |
1568 ResourceMark rm(THREAD); | |
1569 // Return null for arrays and primatives | |
1570 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
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1571 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); |
6983 | 1572 if (k->oop_is_instance()) { |
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1573 Symbol* sym = InstanceKlass::cast(k)->generic_signature(); |
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1574 if (sym == NULL) return NULL; |
0 | 1575 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); |
1576 return (jstring) JNIHandles::make_local(env, str()); | |
1577 } | |
1578 } | |
1579 return NULL; | |
1580 JVM_END | |
1581 | |
1582 | |
1583 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls)) | |
1584 assert (cls != NULL, "illegal class"); | |
1585 JVMWrapper("JVM_GetClassAnnotations"); | |
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1586 |
0 | 1587 // Return null for arrays and primitives |
1588 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
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1589 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); |
6983 | 1590 if (k->oop_is_instance()) { |
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1591 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL); |
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1592 return (jbyteArray) JNIHandles::make_local(env, a); |
0 | 1593 } |
1594 } | |
1595 return NULL; | |
1596 JVM_END | |
1597 | |
1598 | |
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1599 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) { |
0 | 1600 // some of this code was adapted from from jni_FromReflectedField |
1601 | |
1602 oop reflected = JNIHandles::resolve_non_null(field); | |
1603 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
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1604 Klass* k = java_lang_Class::as_Klass(mirror); |
0 | 1605 int slot = java_lang_reflect_Field::slot(reflected); |
1606 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
1607 | |
1608 KlassHandle kh(THREAD, k); | |
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1609 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot); |
0 | 1610 |
1611 if (modifiers & JVM_ACC_STATIC) { | |
1612 // for static fields we only look in the current class | |
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1613 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) { |
0 | 1614 assert(false, "cannot find static field"); |
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1615 return false; |
0 | 1616 } |
1617 } else { | |
1618 // for instance fields we start with the current class and work | |
1619 // our way up through the superclass chain | |
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1620 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) { |
0 | 1621 assert(false, "cannot find instance field"); |
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1622 return false; |
0 | 1623 } |
1624 } | |
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1625 return true; |
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|
1626 } |
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|
1627 |
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1628 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field)) |
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|
1629 // field is a handle to a java.lang.reflect.Field object |
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1630 assert(field != NULL, "illegal field"); |
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|
1631 JVMWrapper("JVM_GetFieldAnnotations"); |
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|
1632 |
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|
1633 fieldDescriptor fd; |
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|
1634 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL); |
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|
1635 if (!gotFd) { |
1916ca1dec2f
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|
1636 return NULL; |
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|
1637 } |
0 | 1638 |
6725
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1639 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD)); |
0 | 1640 JVM_END |
1641 | |
1642 | |
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1643 static Method* jvm_get_method_common(jobject method) { |
0 | 1644 // some of this code was adapted from from jni_FromReflectedMethod |
1645 | |
1646 oop reflected = JNIHandles::resolve_non_null(method); | |
1647 oop mirror = NULL; | |
1648 int slot = 0; | |
1649 | |
1142 | 1650 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { |
0 | 1651 mirror = java_lang_reflect_Constructor::clazz(reflected); |
1652 slot = java_lang_reflect_Constructor::slot(reflected); | |
1653 } else { | |
1142 | 1654 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), |
0 | 1655 "wrong type"); |
1656 mirror = java_lang_reflect_Method::clazz(reflected); | |
1657 slot = java_lang_reflect_Method::slot(reflected); | |
1658 } | |
6725
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1659 Klass* k = java_lang_Class::as_Klass(mirror); |
0 | 1660 |
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1661 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot); |
8818
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1662 assert(m != NULL, "cannot find method"); |
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1663 return m; // caller has to deal with NULL in product mode |
0 | 1664 } |
1665 | |
1666 | |
1667 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method)) | |
1668 JVMWrapper("JVM_GetMethodAnnotations"); | |
1669 | |
1670 // method is a handle to a java.lang.reflect.Method object | |
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1671 Method* m = jvm_get_method_common(method); |
8818
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1672 if (m == NULL) { |
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|
1673 return NULL; |
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|
1674 } |
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|
1675 |
6725
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1676 return (jbyteArray) JNIHandles::make_local(env, |
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1677 Annotations::make_java_array(m->annotations(), THREAD)); |
0 | 1678 JVM_END |
1679 | |
1680 | |
1681 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method)) | |
1682 JVMWrapper("JVM_GetMethodDefaultAnnotationValue"); | |
1683 | |
1684 // method is a handle to a java.lang.reflect.Method object | |
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|
1685 Method* m = jvm_get_method_common(method); |
8818
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|
1686 if (m == NULL) { |
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|
1687 return NULL; |
1916ca1dec2f
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|
1688 } |
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|
1689 |
6725
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|
1690 return (jbyteArray) JNIHandles::make_local(env, |
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|
1691 Annotations::make_java_array(m->annotation_default(), THREAD)); |
0 | 1692 JVM_END |
1693 | |
1694 | |
1695 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method)) | |
1696 JVMWrapper("JVM_GetMethodParameterAnnotations"); | |
1697 | |
1698 // method is a handle to a java.lang.reflect.Method object | |
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|
1699 Method* m = jvm_get_method_common(method); |
8818
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|
1700 if (m == NULL) { |
1916ca1dec2f
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|
1701 return NULL; |
1916ca1dec2f
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|
1702 } |
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|
1703 |
6725
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|
1704 return (jbyteArray) JNIHandles::make_local(env, |
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1705 Annotations::make_java_array(m->parameter_annotations(), THREAD)); |
0 | 1706 JVM_END |
1707 | |
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1708 /* Type use annotations support (JDK 1.8) */ |
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|
1709 |
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1710 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls)) |
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|
1711 assert (cls != NULL, "illegal class"); |
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|
1712 JVMWrapper("JVM_GetClassTypeAnnotations"); |
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|
1713 ResourceMark rm(THREAD); |
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|
1714 // Return null for arrays and primitives |
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|
1715 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { |
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|
1716 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); |
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|
1717 if (k->oop_is_instance()) { |
8031 | 1718 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations(); |
7611
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1719 if (type_annotations != NULL) { |
8031 | 1720 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); |
7611
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|
1721 return (jbyteArray) JNIHandles::make_local(env, a); |
ff0a7943fd29
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|
1722 } |
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|
1723 } |
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|
1724 } |
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|
1725 return NULL; |
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|
1726 JVM_END |
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|
1727 |
8818
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|
1728 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method)) |
1916ca1dec2f
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changeset
|
1729 assert (method != NULL, "illegal method"); |
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|
1730 JVMWrapper("JVM_GetMethodTypeAnnotations"); |
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|
1731 |
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|
1732 // method is a handle to a java.lang.reflect.Method object |
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|
1733 Method* m = jvm_get_method_common(method); |
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|
1734 if (m == NULL) { |
1916ca1dec2f
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|
1735 return NULL; |
1916ca1dec2f
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changeset
|
1736 } |
1916ca1dec2f
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|
1737 |
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|
1738 AnnotationArray* type_annotations = m->type_annotations(); |
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|
1739 if (type_annotations != NULL) { |
1916ca1dec2f
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|
1740 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); |
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|
1741 return (jbyteArray) JNIHandles::make_local(env, a); |
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|
1742 } |
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|
1743 |
1916ca1dec2f
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|
1744 return NULL; |
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|
1745 JVM_END |
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|
1746 |
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|
1747 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field)) |
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|
1748 assert (field != NULL, "illegal field"); |
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changeset
|
1749 JVMWrapper("JVM_GetFieldTypeAnnotations"); |
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|
1750 |
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|
1751 fieldDescriptor fd; |
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|
1752 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL); |
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|
1753 if (!gotFd) { |
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|
1754 return NULL; |
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|
1755 } |
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|
1756 |
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|
1757 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD)); |
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|
1758 JVM_END |
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|
1759 |
7588
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|
1760 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { |
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|
1761 if (!cp->is_within_bounds(index)) { |
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|
1762 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); |
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|
1763 } |
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|
1764 } |
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|
1765 |
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|
1766 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method)) |
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|
1767 { |
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|
1768 JVMWrapper("JVM_GetMethodParameters"); |
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|
1769 // method is a handle to a java.lang.reflect.Method object |
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|
1770 Method* method_ptr = jvm_get_method_common(method); |
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|
1771 methodHandle mh (THREAD, method_ptr); |
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|
1772 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method)); |
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|
1773 const int num_params = mh->method_parameters_length(); |
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|
1774 |
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|
1775 if (0 != num_params) { |
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|
1776 // make sure all the symbols are properly formatted |
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|
1777 for (int i = 0; i < num_params; i++) { |
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|
1778 MethodParametersElement* params = mh->method_parameters_start(); |
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|
1779 int index = params[i].name_cp_index; |
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|
1780 bounds_check(mh->constants(), index, CHECK_NULL); |
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|
1781 |
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|
1782 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) { |
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|
1783 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), |
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|
1784 "Wrong type at constant pool index"); |
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1785 } |
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1786 |
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1787 } |
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1788 |
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1789 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL); |
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1790 objArrayHandle result (THREAD, result_oop); |
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1791 |
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1792 for (int i = 0; i < num_params; i++) { |
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1793 MethodParametersElement* params = mh->method_parameters_start(); |
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1794 // For a 0 index, give a NULL symbol |
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1795 Symbol* sym = 0 != params[i].name_cp_index ? |
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1796 mh->constants()->symbol_at(params[i].name_cp_index) : NULL; |
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1797 int flags = params[i].flags; |
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1798 oop param = Reflection::new_parameter(reflected_method, i, sym, |
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1799 flags, CHECK_NULL); |
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1800 result->obj_at_put(i, param); |
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1801 } |
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1802 return (jobjectArray)JNIHandles::make_local(env, result()); |
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1803 } else { |
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1804 return (jobjectArray)NULL; |
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1805 } |
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1806 } |
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1807 JVM_END |
0 | 1808 |
1809 // New (JDK 1.4) reflection implementation ///////////////////////////////////// | |
1810 | |
1811 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly)) | |
1812 { | |
1813 JVMWrapper("JVM_GetClassDeclaredFields"); | |
1814 JvmtiVMObjectAllocEventCollector oam; | |
1815 | |
1816 // Exclude primitive types and array types | |
1817 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || | |
6983 | 1818 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { |
0 | 1819 // Return empty array |
1142 | 1820 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL); |
0 | 1821 return (jobjectArray) JNIHandles::make_local(env, res); |
1822 } | |
1823 | |
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1824 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); |
0 | 1825 constantPoolHandle cp(THREAD, k->constants()); |
1826 | |
1827 // Ensure class is linked | |
1828 k->link_class(CHECK_NULL); | |
1829 | |
1830 // 4496456 We need to filter out java.lang.Throwable.backtrace | |
1831 bool skip_backtrace = false; | |
1832 | |
1833 // Allocate result | |
1834 int num_fields; | |
1835 | |
1836 if (publicOnly) { | |
1837 num_fields = 0; | |
3938 | 1838 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) { |
1839 if (fs.access_flags().is_public()) ++num_fields; | |
0 | 1840 } |
1841 } else { | |
3938 | 1842 num_fields = k->java_fields_count(); |
0 | 1843 |
1142 | 1844 if (k() == SystemDictionary::Throwable_klass()) { |
0 | 1845 num_fields--; |
1846 skip_backtrace = true; | |
1847 } | |
1848 } | |
1849 | |
1142 | 1850 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL); |
0 | 1851 objArrayHandle result (THREAD, r); |
1852 | |
1853 int out_idx = 0; | |
1854 fieldDescriptor fd; | |
3938 | 1855 for (JavaFieldStream fs(k); !fs.done(); fs.next()) { |
0 | 1856 if (skip_backtrace) { |
1857 // 4496456 skip java.lang.Throwable.backtrace | |
3938 | 1858 int offset = fs.offset(); |
0 | 1859 if (offset == java_lang_Throwable::get_backtrace_offset()) continue; |
1860 } | |
1861 | |
3938 | 1862 if (!publicOnly || fs.access_flags().is_public()) { |
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1863 fd.reinitialize(k(), fs.index()); |
0 | 1864 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); |
1865 result->obj_at_put(out_idx, field); | |
1866 ++out_idx; | |
1867 } | |
1868 } | |
1869 assert(out_idx == num_fields, "just checking"); | |
1870 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1871 } | |
1872 JVM_END | |
1873 | |
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1874 static bool select_method(methodHandle method, bool want_constructor) { |
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1875 if (want_constructor) { |
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1876 return (method->is_initializer() && !method->is_static()); |
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1877 } else { |
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1878 return (!method->is_initializer() && !method->is_overpass()); |
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1879 } |
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1880 } |
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1881 |
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1882 static jobjectArray get_class_declared_methods_helper( |
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1883 JNIEnv *env, |
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1884 jclass ofClass, jboolean publicOnly, |
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1885 bool want_constructor, |
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1886 Klass* klass, TRAPS) { |
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1887 |
0 | 1888 JvmtiVMObjectAllocEventCollector oam; |
1889 | |
1890 // Exclude primitive types and array types | |
1891 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) | |
6983 | 1892 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { |
0 | 1893 // Return empty array |
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1894 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL); |
0 | 1895 return (jobjectArray) JNIHandles::make_local(env, res); |
1896 } | |
1897 | |
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1898 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); |
0 | 1899 |
1900 // Ensure class is linked | |
1901 k->link_class(CHECK_NULL); | |
1902 | |
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1903 Array<Method*>* methods = k->methods(); |
0 | 1904 int methods_length = methods->length(); |
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1905 |
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1906 // Save original method_idnum in case of redefinition, which can change |
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1907 // the idnum of obsolete methods. The new method will have the same idnum |
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1908 // but if we refresh the methods array, the counts will be wrong. |
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1909 ResourceMark rm(THREAD); |
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1910 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length); |
0 | 1911 int num_methods = 0; |
1912 | |
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1913 for (int i = 0; i < methods_length; i++) { |
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1914 methodHandle method(THREAD, methods->at(i)); |
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1915 if (select_method(method, want_constructor)) { |
0 | 1916 if (!publicOnly || method->is_public()) { |
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1917 idnums->push(method->method_idnum()); |
0 | 1918 ++num_methods; |
1919 } | |
1920 } | |
1921 } | |
1922 | |
1923 // Allocate result | |
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1924 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL); |
0 | 1925 objArrayHandle result (THREAD, r); |
1926 | |
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1927 // Now just put the methods that we selected above, but go by their idnum |
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1928 // in case of redefinition. The methods can be redefined at any safepoint, |
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1929 // so above when allocating the oop array and below when creating reflect |
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1930 // objects. |
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1931 for (int i = 0; i < num_methods; i++) { |
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1932 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i))); |
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1933 if (method.is_null()) { |
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1934 // Method may have been deleted and seems this API can handle null |
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1935 // Otherwise should probably put a method that throws NSME |
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1936 result->obj_at_put(i, NULL); |
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1937 } else { |
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1938 oop m; |
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1939 if (want_constructor) { |
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1940 m = Reflection::new_constructor(method, CHECK_NULL); |
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1941 } else { |
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1942 m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); |
0 | 1943 } |
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1944 result->obj_at_put(i, m); |
0 | 1945 } |
1946 } | |
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1947 |
0 | 1948 return (jobjectArray) JNIHandles::make_local(env, result()); |
1949 } | |
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1950 |
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1951 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) |
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1952 { |
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1953 JVMWrapper("JVM_GetClassDeclaredMethods"); |
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1954 return get_class_declared_methods_helper(env, ofClass, publicOnly, |
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1955 /*want_constructor*/ false, |
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1956 SystemDictionary::reflect_Method_klass(), THREAD); |
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1957 } |
0 | 1958 JVM_END |
1959 | |
1960 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) | |
1961 { | |
1962 JVMWrapper("JVM_GetClassDeclaredConstructors"); | |
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1963 return get_class_declared_methods_helper(env, ofClass, publicOnly, |
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1964 /*want_constructor*/ true, |
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1965 SystemDictionary::reflect_Constructor_klass(), THREAD); |
0 | 1966 } |
1967 JVM_END | |
1968 | |
1969 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls)) | |
1970 { | |
1971 JVMWrapper("JVM_GetClassAccessFlags"); | |
1972 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1973 // Primitive type | |
1974 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; | |
1975 } | |
1976 | |
6983 | 1977 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 1978 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS; |
1979 } | |
1980 JVM_END | |
1981 | |
1982 | |
1983 // Constant pool access ////////////////////////////////////////////////////////// | |
1984 | |
1985 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls)) | |
1986 { | |
1987 JVMWrapper("JVM_GetClassConstantPool"); | |
1988 JvmtiVMObjectAllocEventCollector oam; | |
1989 | |
1990 // Return null for primitives and arrays | |
1991 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
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1992 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
6983 | 1993 if (k->oop_is_instance()) { |
0 | 1994 instanceKlassHandle k_h(THREAD, k); |
1995 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL); | |
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1996 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants()); |
0 | 1997 return JNIHandles::make_local(jcp()); |
1998 } | |
1999 } | |
2000 return NULL; | |
2001 } | |
2002 JVM_END | |
2003 | |
2004 | |
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2005 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused)) |
0 | 2006 { |
2007 JVMWrapper("JVM_ConstantPoolGetSize"); | |
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2008 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2009 return cp->length(); |
2010 } | |
2011 JVM_END | |
2012 | |
2013 | |
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2014 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index)) |
0 | 2015 { |
2016 JVMWrapper("JVM_ConstantPoolGetClassAt"); | |
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2017 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2018 bounds_check(cp, index, CHECK_NULL); |
2019 constantTag tag = cp->tag_at(index); | |
2020 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
2021 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2022 } | |
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2023 Klass* k = cp->klass_at(index, CHECK_NULL); |
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2024 return (jclass) JNIHandles::make_local(k->java_mirror()); |
0 | 2025 } |
2026 JVM_END | |
2027 | |
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2028 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) |
0 | 2029 { |
2030 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded"); | |
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2031 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2032 bounds_check(cp, index, CHECK_NULL); |
2033 constantTag tag = cp->tag_at(index); | |
2034 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
2035 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2036 } | |
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2037 Klass* k = ConstantPool::klass_at_if_loaded(cp, index); |
0 | 2038 if (k == NULL) return NULL; |
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2039 return (jclass) JNIHandles::make_local(k->java_mirror()); |
0 | 2040 } |
2041 JVM_END | |
2042 | |
2043 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { | |
2044 constantTag tag = cp->tag_at(index); | |
2045 if (!tag.is_method() && !tag.is_interface_method()) { | |
2046 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2047 } | |
2048 int klass_ref = cp->uncached_klass_ref_index_at(index); | |
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2049 Klass* k_o; |
0 | 2050 if (force_resolution) { |
2051 k_o = cp->klass_at(klass_ref, CHECK_NULL); | |
2052 } else { | |
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2053 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); |
0 | 2054 if (k_o == NULL) return NULL; |
2055 } | |
2056 instanceKlassHandle k(THREAD, k_o); | |
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2057 Symbol* name = cp->uncached_name_ref_at(index); |
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2058 Symbol* sig = cp->uncached_signature_ref_at(index); |
0 | 2059 methodHandle m (THREAD, k->find_method(name, sig)); |
2060 if (m.is_null()) { | |
2061 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class"); | |
2062 } | |
2063 oop method; | |
2064 if (!m->is_initializer() || m->is_static()) { | |
2065 method = Reflection::new_method(m, true, true, CHECK_NULL); | |
2066 } else { | |
2067 method = Reflection::new_constructor(m, CHECK_NULL); | |
2068 } | |
2069 return JNIHandles::make_local(method); | |
2070 } | |
2071 | |
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2072 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index)) |
0 | 2073 { |
2074 JVMWrapper("JVM_ConstantPoolGetMethodAt"); | |
2075 JvmtiVMObjectAllocEventCollector oam; | |
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2076 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2077 bounds_check(cp, index, CHECK_NULL); |
2078 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL); | |
2079 return res; | |
2080 } | |
2081 JVM_END | |
2082 | |
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2083 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) |
0 | 2084 { |
2085 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded"); | |
2086 JvmtiVMObjectAllocEventCollector oam; | |
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2087 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2088 bounds_check(cp, index, CHECK_NULL); |
2089 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL); | |
2090 return res; | |
2091 } | |
2092 JVM_END | |
2093 | |
2094 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { | |
2095 constantTag tag = cp->tag_at(index); | |
2096 if (!tag.is_field()) { | |
2097 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2098 } | |
2099 int klass_ref = cp->uncached_klass_ref_index_at(index); | |
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2100 Klass* k_o; |
0 | 2101 if (force_resolution) { |
2102 k_o = cp->klass_at(klass_ref, CHECK_NULL); | |
2103 } else { | |
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2104 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); |
0 | 2105 if (k_o == NULL) return NULL; |
2106 } | |
2107 instanceKlassHandle k(THREAD, k_o); | |
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2108 Symbol* name = cp->uncached_name_ref_at(index); |
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2109 Symbol* sig = cp->uncached_signature_ref_at(index); |
0 | 2110 fieldDescriptor fd; |
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2111 Klass* target_klass = k->find_field(name, sig, &fd); |
0 | 2112 if (target_klass == NULL) { |
2113 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class"); | |
2114 } | |
2115 oop field = Reflection::new_field(&fd, true, CHECK_NULL); | |
2116 return JNIHandles::make_local(field); | |
2117 } | |
2118 | |
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2119 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index)) |
0 | 2120 { |
2121 JVMWrapper("JVM_ConstantPoolGetFieldAt"); | |
2122 JvmtiVMObjectAllocEventCollector oam; | |
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2123 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2124 bounds_check(cp, index, CHECK_NULL); |
2125 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL); | |
2126 return res; | |
2127 } | |
2128 JVM_END | |
2129 | |
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2130 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) |
0 | 2131 { |
2132 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded"); | |
2133 JvmtiVMObjectAllocEventCollector oam; | |
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2134 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2135 bounds_check(cp, index, CHECK_NULL); |
2136 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL); | |
2137 return res; | |
2138 } | |
2139 JVM_END | |
2140 | |
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2141 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index)) |
0 | 2142 { |
2143 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt"); | |
2144 JvmtiVMObjectAllocEventCollector oam; | |
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2145 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2146 bounds_check(cp, index, CHECK_NULL); |
2147 constantTag tag = cp->tag_at(index); | |
2148 if (!tag.is_field_or_method()) { | |
2149 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2150 } | |
2151 int klass_ref = cp->uncached_klass_ref_index_at(index); | |
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2152 Symbol* klass_name = cp->klass_name_at(klass_ref); |
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2153 Symbol* member_name = cp->uncached_name_ref_at(index); |
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2154 Symbol* member_sig = cp->uncached_signature_ref_at(index); |
1142 | 2155 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL); |
0 | 2156 objArrayHandle dest(THREAD, dest_o); |
2157 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL); | |
2158 dest->obj_at_put(0, str()); | |
2159 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); | |
2160 dest->obj_at_put(1, str()); | |
2161 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); | |
2162 dest->obj_at_put(2, str()); | |
2163 return (jobjectArray) JNIHandles::make_local(dest()); | |
2164 } | |
2165 JVM_END | |
2166 | |
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2167 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index)) |
0 | 2168 { |
2169 JVMWrapper("JVM_ConstantPoolGetIntAt"); | |
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2170 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2171 bounds_check(cp, index, CHECK_0); |
2172 constantTag tag = cp->tag_at(index); | |
2173 if (!tag.is_int()) { | |
2174 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2175 } | |
2176 return cp->int_at(index); | |
2177 } | |
2178 JVM_END | |
2179 | |
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2180 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index)) |
0 | 2181 { |
2182 JVMWrapper("JVM_ConstantPoolGetLongAt"); | |
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2183 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2184 bounds_check(cp, index, CHECK_(0L)); |
2185 constantTag tag = cp->tag_at(index); | |
2186 if (!tag.is_long()) { | |
2187 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2188 } | |
2189 return cp->long_at(index); | |
2190 } | |
2191 JVM_END | |
2192 | |
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2193 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index)) |
0 | 2194 { |
2195 JVMWrapper("JVM_ConstantPoolGetFloatAt"); | |
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2196 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2197 bounds_check(cp, index, CHECK_(0.0f)); |
2198 constantTag tag = cp->tag_at(index); | |
2199 if (!tag.is_float()) { | |
2200 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2201 } | |
2202 return cp->float_at(index); | |
2203 } | |
2204 JVM_END | |
2205 | |
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2206 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index)) |
0 | 2207 { |
2208 JVMWrapper("JVM_ConstantPoolGetDoubleAt"); | |
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2209 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2210 bounds_check(cp, index, CHECK_(0.0)); |
2211 constantTag tag = cp->tag_at(index); | |
2212 if (!tag.is_double()) { | |
2213 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2214 } | |
2215 return cp->double_at(index); | |
2216 } | |
2217 JVM_END | |
2218 | |
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2219 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index)) |
0 | 2220 { |
2221 JVMWrapper("JVM_ConstantPoolGetStringAt"); | |
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2222 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2223 bounds_check(cp, index, CHECK_NULL); |
2224 constantTag tag = cp->tag_at(index); | |
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2225 if (!tag.is_string()) { |
0 | 2226 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); |
2227 } | |
2228 oop str = cp->string_at(index, CHECK_NULL); | |
2229 return (jstring) JNIHandles::make_local(str); | |
2230 } | |
2231 JVM_END | |
2232 | |
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2233 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index)) |
0 | 2234 { |
2235 JVMWrapper("JVM_ConstantPoolGetUTF8At"); | |
2236 JvmtiVMObjectAllocEventCollector oam; | |
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2237 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
0 | 2238 bounds_check(cp, index, CHECK_NULL); |
2239 constantTag tag = cp->tag_at(index); | |
2240 if (!tag.is_symbol()) { | |
2241 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2242 } | |
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2243 Symbol* sym = cp->symbol_at(index); |
0 | 2244 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); |
2245 return (jstring) JNIHandles::make_local(str()); | |
2246 } | |
2247 JVM_END | |
2248 | |
2249 | |
2250 // Assertion support. ////////////////////////////////////////////////////////// | |
2251 | |
2252 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls)) | |
2253 JVMWrapper("JVM_DesiredAssertionStatus"); | |
2254 assert(cls != NULL, "bad class"); | |
2255 | |
2256 oop r = JNIHandles::resolve(cls); | |
2257 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed"); | |
2258 if (java_lang_Class::is_primitive(r)) return false; | |
2259 | |
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2260 Klass* k = java_lang_Class::as_Klass(r); |
6983 | 2261 assert(k->oop_is_instance(), "must be an instance klass"); |
2262 if (! k->oop_is_instance()) return false; | |
0 | 2263 |
2264 ResourceMark rm(THREAD); | |
6983 | 2265 const char* name = k->name()->as_C_string(); |
2266 bool system_class = k->class_loader() == NULL; | |
0 | 2267 return JavaAssertions::enabled(name, system_class); |
2268 | |
2269 JVM_END | |
2270 | |
2271 | |
2272 // Return a new AssertionStatusDirectives object with the fields filled in with | |
2273 // command-line assertion arguments (i.e., -ea, -da). | |
2274 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused)) | |
2275 JVMWrapper("JVM_AssertionStatusDirectives"); | |
2276 JvmtiVMObjectAllocEventCollector oam; | |
2277 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL); | |
2278 return JNIHandles::make_local(env, asd); | |
2279 JVM_END | |
2280 | |
2281 // Verification //////////////////////////////////////////////////////////////////////////////// | |
2282 | |
2283 // Reflection for the verifier ///////////////////////////////////////////////////////////////// | |
2284 | |
2285 // RedefineClasses support: bug 6214132 caused verification to fail. | |
2286 // All functions from this section should call the jvmtiThreadSate function: | |
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2287 // Klass* class_to_verify_considering_redefinition(Klass* klass). |
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2288 // The function returns a Klass* of the _scratch_class if the verifier |
0 | 2289 // was invoked in the middle of the class redefinition. |
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2290 // Otherwise it returns its argument value which is the _the_class Klass*. |
0 | 2291 // Please, refer to the description in the jvmtiThreadSate.hpp. |
2292 | |
2293 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls)) | |
2294 JVMWrapper("JVM_GetClassNameUTF"); | |
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2295 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2296 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
6983 | 2297 return k->name()->as_utf8(); |
0 | 2298 JVM_END |
2299 | |
2300 | |
2301 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types)) | |
2302 JVMWrapper("JVM_GetClassCPTypes"); | |
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2303 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2304 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2305 // types will have length zero if this is not an InstanceKlass |
0 | 2306 // (length is determined by call to JVM_GetClassCPEntriesCount) |
6983 | 2307 if (k->oop_is_instance()) { |
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2308 ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
0 | 2309 for (int index = cp->length() - 1; index >= 0; index--) { |
2310 constantTag tag = cp->tag_at(index); | |
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2311 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value(); |
0 | 2312 } |
2313 } | |
2314 JVM_END | |
2315 | |
2316 | |
2317 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls)) | |
2318 JVMWrapper("JVM_GetClassCPEntriesCount"); | |
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2319 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2320 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
6983 | 2321 if (!k->oop_is_instance()) |
0 | 2322 return 0; |
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2323 return InstanceKlass::cast(k)->constants()->length(); |
0 | 2324 JVM_END |
2325 | |
2326 | |
2327 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls)) | |
2328 JVMWrapper("JVM_GetClassFieldsCount"); | |
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2329 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2330 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
6983 | 2331 if (!k->oop_is_instance()) |
0 | 2332 return 0; |
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2333 return InstanceKlass::cast(k)->java_fields_count(); |
0 | 2334 JVM_END |
2335 | |
2336 | |
2337 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls)) | |
2338 JVMWrapper("JVM_GetClassMethodsCount"); | |
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2339 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2340 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
6983 | 2341 if (!k->oop_is_instance()) |
0 | 2342 return 0; |
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2343 return InstanceKlass::cast(k)->methods()->length(); |
0 | 2344 JVM_END |
2345 | |
2346 | |
2347 // The following methods, used for the verifier, are never called with | |
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2348 // array klasses, so a direct cast to InstanceKlass is safe. |
0 | 2349 // Typically, these methods are called in a loop with bounds determined |
2350 // by the results of JVM_GetClass{Fields,Methods}Count, which return | |
2351 // zero for arrays. | |
2352 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions)) | |
2353 JVMWrapper("JVM_GetMethodIxExceptionIndexes"); | |
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2354 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2355 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2356 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2357 int length = method->checked_exceptions_length(); |
0 | 2358 if (length > 0) { |
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2359 CheckedExceptionElement* table= method->checked_exceptions_start(); |
0 | 2360 for (int i = 0; i < length; i++) { |
2361 exceptions[i] = table[i].class_cp_index; | |
2362 } | |
2363 } | |
2364 JVM_END | |
2365 | |
2366 | |
2367 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index)) | |
2368 JVMWrapper("JVM_GetMethodIxExceptionsCount"); | |
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2369 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2370 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2371 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2372 return method->checked_exceptions_length(); |
0 | 2373 JVM_END |
2374 | |
2375 | |
2376 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code)) | |
2377 JVMWrapper("JVM_GetMethodIxByteCode"); | |
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2378 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2379 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2380 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2381 memcpy(code, method->code_base(), method->code_size()); |
0 | 2382 JVM_END |
2383 | |
2384 | |
2385 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index)) | |
2386 JVMWrapper("JVM_GetMethodIxByteCodeLength"); | |
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2387 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2388 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2389 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2390 return method->code_size(); |
0 | 2391 JVM_END |
2392 | |
2393 | |
2394 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry)) | |
2395 JVMWrapper("JVM_GetMethodIxExceptionTableEntry"); | |
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2396 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2397 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2398 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2399 ExceptionTable extable(method); |
6213
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2400 entry->start_pc = extable.start_pc(entry_index); |
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2401 entry->end_pc = extable.end_pc(entry_index); |
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2402 entry->handler_pc = extable.handler_pc(entry_index); |
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2403 entry->catchType = extable.catch_type_index(entry_index); |
0 | 2404 JVM_END |
2405 | |
2406 | |
2407 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index)) | |
2408 JVMWrapper("JVM_GetMethodIxExceptionTableLength"); | |
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2409 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2410 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2411 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2412 return method->exception_table_length(); |
0 | 2413 JVM_END |
2414 | |
2415 | |
2416 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index)) | |
2417 JVMWrapper("JVM_GetMethodIxModifiers"); | |
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2418 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2419 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2420 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2421 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; |
0 | 2422 JVM_END |
2423 | |
2424 | |
2425 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index)) | |
2426 JVMWrapper("JVM_GetFieldIxModifiers"); | |
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2427 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2428 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2429 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS; |
0 | 2430 JVM_END |
2431 | |
2432 | |
2433 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index)) | |
2434 JVMWrapper("JVM_GetMethodIxLocalsCount"); | |
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2435 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2436 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2437 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2438 return method->max_locals(); |
0 | 2439 JVM_END |
2440 | |
2441 | |
2442 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index)) | |
2443 JVMWrapper("JVM_GetMethodIxArgsSize"); | |
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2444 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2445 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2446 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2447 return method->size_of_parameters(); |
0 | 2448 JVM_END |
2449 | |
2450 | |
2451 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index)) | |
2452 JVMWrapper("JVM_GetMethodIxMaxStack"); | |
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2453 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2454 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2455 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2456 return method->verifier_max_stack(); |
0 | 2457 JVM_END |
2458 | |
2459 | |
2460 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index)) | |
2461 JVMWrapper("JVM_IsConstructorIx"); | |
2462 ResourceMark rm(THREAD); | |
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2463 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2464 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2465 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2466 return method->name() == vmSymbols::object_initializer_name(); |
0 | 2467 JVM_END |
2468 | |
2469 | |
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2470 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index)) |
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2471 JVMWrapper("JVM_IsVMGeneratedMethodIx"); |
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|
2472 ResourceMark rm(THREAD); |
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2473 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
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2474 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2475 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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|
2476 return method->is_overpass(); |
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|
2477 JVM_END |
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2478 |
0 | 2479 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index)) |
2480 JVMWrapper("JVM_GetMethodIxIxUTF"); | |
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2481 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2482 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2483 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2484 return method->name()->as_utf8(); |
0 | 2485 JVM_END |
2486 | |
2487 | |
2488 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index)) | |
2489 JVMWrapper("JVM_GetMethodIxSignatureUTF"); | |
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2490 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2491 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2492 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
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2493 return method->signature()->as_utf8(); |
0 | 2494 JVM_END |
2495 | |
2496 /** | |
2497 * All of these JVM_GetCP-xxx methods are used by the old verifier to | |
2498 * read entries in the constant pool. Since the old verifier always | |
2499 * works on a copy of the code, it will not see any rewriting that | |
2500 * may possibly occur in the middle of verification. So it is important | |
2501 * that nothing it calls tries to use the cpCache instead of the raw | |
2502 * constant pool, so we must use cp->uncached_x methods when appropriate. | |
2503 */ | |
2504 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2505 JVMWrapper("JVM_GetCPFieldNameUTF"); | |
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2506 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2507 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2508 ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
0 | 2509 switch (cp->tag_at(cp_index).value()) { |
2510 case JVM_CONSTANT_Fieldref: | |
2511 return cp->uncached_name_ref_at(cp_index)->as_utf8(); | |
2512 default: | |
2513 fatal("JVM_GetCPFieldNameUTF: illegal constant"); | |
2514 } | |
2515 ShouldNotReachHere(); | |
2516 return NULL; | |
2517 JVM_END | |
2518 | |
2519 | |
2520 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2521 JVMWrapper("JVM_GetCPMethodNameUTF"); | |
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2522 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2523 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2524 ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
0 | 2525 switch (cp->tag_at(cp_index).value()) { |
2526 case JVM_CONSTANT_InterfaceMethodref: | |
2527 case JVM_CONSTANT_Methodref: | |
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2528 case JVM_CONSTANT_NameAndType: // for invokedynamic |
0 | 2529 return cp->uncached_name_ref_at(cp_index)->as_utf8(); |
2530 default: | |
2531 fatal("JVM_GetCPMethodNameUTF: illegal constant"); | |
2532 } | |
2533 ShouldNotReachHere(); | |
2534 return NULL; | |
2535 JVM_END | |
2536 | |
2537 | |
2538 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2539 JVMWrapper("JVM_GetCPMethodSignatureUTF"); | |
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2540 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2541 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2542 ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
0 | 2543 switch (cp->tag_at(cp_index).value()) { |
2544 case JVM_CONSTANT_InterfaceMethodref: | |
2545 case JVM_CONSTANT_Methodref: | |
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2546 case JVM_CONSTANT_NameAndType: // for invokedynamic |
0 | 2547 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); |
2548 default: | |
2549 fatal("JVM_GetCPMethodSignatureUTF: illegal constant"); | |
2550 } | |
2551 ShouldNotReachHere(); | |
2552 return NULL; | |
2553 JVM_END | |
2554 | |
2555 | |
2556 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2557 JVMWrapper("JVM_GetCPFieldSignatureUTF"); | |
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2558 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2559 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2560 ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
0 | 2561 switch (cp->tag_at(cp_index).value()) { |
2562 case JVM_CONSTANT_Fieldref: | |
2563 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); | |
2564 default: | |
2565 fatal("JVM_GetCPFieldSignatureUTF: illegal constant"); | |
2566 } | |
2567 ShouldNotReachHere(); | |
2568 return NULL; | |
2569 JVM_END | |
2570 | |
2571 | |
2572 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2573 JVMWrapper("JVM_GetCPClassNameUTF"); | |
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2574 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2575 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2576 ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
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2577 Symbol* classname = cp->klass_name_at(cp_index); |
0 | 2578 return classname->as_utf8(); |
2579 JVM_END | |
2580 | |
2581 | |
2582 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2583 JVMWrapper("JVM_GetCPFieldClassNameUTF"); | |
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2584 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2585 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2586 ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
0 | 2587 switch (cp->tag_at(cp_index).value()) { |
2588 case JVM_CONSTANT_Fieldref: { | |
2589 int class_index = cp->uncached_klass_ref_index_at(cp_index); | |
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2590 Symbol* classname = cp->klass_name_at(class_index); |
0 | 2591 return classname->as_utf8(); |
2592 } | |
2593 default: | |
2594 fatal("JVM_GetCPFieldClassNameUTF: illegal constant"); | |
2595 } | |
2596 ShouldNotReachHere(); | |
2597 return NULL; | |
2598 JVM_END | |
2599 | |
2600 | |
2601 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2602 JVMWrapper("JVM_GetCPMethodClassNameUTF"); | |
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2603 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
0 | 2604 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
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2605 ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
0 | 2606 switch (cp->tag_at(cp_index).value()) { |
2607 case JVM_CONSTANT_Methodref: | |
2608 case JVM_CONSTANT_InterfaceMethodref: { | |
2609 int class_index = cp->uncached_klass_ref_index_at(cp_index); | |
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2610 Symbol* classname = cp->klass_name_at(class_index); |
0 | 2611 return classname->as_utf8(); |
2612 } | |
2613 default: | |
2614 fatal("JVM_GetCPMethodClassNameUTF: illegal constant"); | |
2615 } | |
2616 ShouldNotReachHere(); | |
2617 return NULL; | |
2618 JVM_END | |
2619 | |
2620 | |
3938 | 2621 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) |
0 | 2622 JVMWrapper("JVM_GetCPFieldModifiers"); |
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2623 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
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2624 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); |
0 | 2625 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
2626 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); | |
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2627 ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
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2628 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants(); |
0 | 2629 switch (cp->tag_at(cp_index).value()) { |
2630 case JVM_CONSTANT_Fieldref: { | |
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2631 Symbol* name = cp->uncached_name_ref_at(cp_index); |
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2632 Symbol* signature = cp->uncached_signature_ref_at(cp_index); |
3938 | 2633 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) { |
2634 if (fs.name() == name && fs.signature() == signature) { | |
2635 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
0 | 2636 } |
2637 } | |
2638 return -1; | |
2639 } | |
2640 default: | |
2641 fatal("JVM_GetCPFieldModifiers: illegal constant"); | |
2642 } | |
2643 ShouldNotReachHere(); | |
2644 return 0; | |
2645 JVM_END | |
2646 | |
2647 | |
2648 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) | |
2649 JVMWrapper("JVM_GetCPMethodModifiers"); | |
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2650 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
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2651 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); |
0 | 2652 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
2653 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); | |
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2654 ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
0 | 2655 switch (cp->tag_at(cp_index).value()) { |
2656 case JVM_CONSTANT_Methodref: | |
2657 case JVM_CONSTANT_InterfaceMethodref: { | |
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2658 Symbol* name = cp->uncached_name_ref_at(cp_index); |
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2659 Symbol* signature = cp->uncached_signature_ref_at(cp_index); |
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2660 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods(); |
0 | 2661 int methods_count = methods->length(); |
2662 for (int i = 0; i < methods_count; i++) { | |
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2663 Method* method = methods->at(i); |
0 | 2664 if (method->name() == name && method->signature() == signature) { |
2665 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; | |
2666 } | |
2667 } | |
2668 return -1; | |
2669 } | |
2670 default: | |
2671 fatal("JVM_GetCPMethodModifiers: illegal constant"); | |
2672 } | |
2673 ShouldNotReachHere(); | |
2674 return 0; | |
2675 JVM_END | |
2676 | |
2677 | |
2678 // Misc ////////////////////////////////////////////////////////////////////////////////////////////// | |
2679 | |
2680 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf)) | |
2681 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything | |
2682 JVM_END | |
2683 | |
2684 | |
2685 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2)) | |
2686 JVMWrapper("JVM_IsSameClassPackage"); | |
2687 oop class1_mirror = JNIHandles::resolve_non_null(class1); | |
2688 oop class2_mirror = JNIHandles::resolve_non_null(class2); | |
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2689 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror); |
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2690 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror); |
0 | 2691 return (jboolean) Reflection::is_same_class_package(klass1, klass2); |
2692 JVM_END | |
2693 | |
2694 | |
2695 // IO functions //////////////////////////////////////////////////////////////////////////////////////// | |
2696 | |
2697 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode)) | |
2698 JVMWrapper2("JVM_Open (%s)", fname); | |
2699 | |
2700 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
2701 int result = os::open(fname, flags, mode); |
0 | 2702 if (result >= 0) { |
2703 return result; | |
2704 } else { | |
2705 switch(errno) { | |
2706 case EEXIST: | |
2707 return JVM_EEXIST; | |
2708 default: | |
2709 return -1; | |
2710 } | |
2711 } | |
2712 JVM_END | |
2713 | |
2714 | |
2715 JVM_LEAF(jint, JVM_Close(jint fd)) | |
2716 JVMWrapper2("JVM_Close (0x%x)", fd); | |
2717 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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diff
changeset
|
2718 return os::close(fd); |
0 | 2719 JVM_END |
2720 | |
2721 | |
2722 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes)) | |
2723 JVMWrapper2("JVM_Read (0x%x)", fd); | |
2724 | |
2725 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
2726 return (jint)os::restartable_read(fd, buf, nbytes); |
0 | 2727 JVM_END |
2728 | |
2729 | |
2730 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes)) | |
2731 JVMWrapper2("JVM_Write (0x%x)", fd); | |
2732 | |
2733 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
2734 return (jint)os::write(fd, buf, nbytes); |
0 | 2735 JVM_END |
2736 | |
2737 | |
2738 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes)) | |
2739 JVMWrapper2("JVM_Available (0x%x)", fd); | |
2740 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
2741 return os::available(fd, pbytes); |
0 | 2742 JVM_END |
2743 | |
2744 | |
2745 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence)) | |
2746 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence); | |
2747 //%note jvm_r6 | |
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828eafbd85cc
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ikrylov
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1972
diff
changeset
|
2748 return os::lseek(fd, offset, whence); |
0 | 2749 JVM_END |
2750 | |
2751 | |
2752 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length)) | |
2753 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length); | |
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828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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diff
changeset
|
2754 return os::ftruncate(fd, length); |
0 | 2755 JVM_END |
2756 | |
2757 | |
2758 JVM_LEAF(jint, JVM_Sync(jint fd)) | |
2759 JVMWrapper2("JVM_Sync (0x%x)", fd); | |
2760 //%note jvm_r6 | |
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diff
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|
2761 return os::fsync(fd); |
0 | 2762 JVM_END |
2763 | |
2764 | |
2765 // Printing support ////////////////////////////////////////////////// | |
2766 extern "C" { | |
2767 | |
2768 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) { | |
2769 // see bug 4399518, 4417214 | |
2770 if ((intptr_t)count <= 0) return -1; | |
2771 return vsnprintf(str, count, fmt, args); | |
2772 } | |
2773 | |
2774 | |
2775 int jio_snprintf(char *str, size_t count, const char *fmt, ...) { | |
2776 va_list args; | |
2777 int len; | |
2778 va_start(args, fmt); | |
2779 len = jio_vsnprintf(str, count, fmt, args); | |
2780 va_end(args); | |
2781 return len; | |
2782 } | |
2783 | |
2784 | |
2785 int jio_fprintf(FILE* f, const char *fmt, ...) { | |
2786 int len; | |
2787 va_list args; | |
2788 va_start(args, fmt); | |
2789 len = jio_vfprintf(f, fmt, args); | |
2790 va_end(args); | |
2791 return len; | |
2792 } | |
2793 | |
2794 | |
2795 int jio_vfprintf(FILE* f, const char *fmt, va_list args) { | |
2796 if (Arguments::vfprintf_hook() != NULL) { | |
2797 return Arguments::vfprintf_hook()(f, fmt, args); | |
2798 } else { | |
2799 return vfprintf(f, fmt, args); | |
2800 } | |
2801 } | |
2802 | |
2803 | |
2191 | 2804 JNIEXPORT int jio_printf(const char *fmt, ...) { |
0 | 2805 int len; |
2806 va_list args; | |
2807 va_start(args, fmt); | |
2808 len = jio_vfprintf(defaultStream::output_stream(), fmt, args); | |
2809 va_end(args); | |
2810 return len; | |
2811 } | |
2812 | |
2813 | |
2814 // HotSpot specific jio method | |
2815 void jio_print(const char* s) { | |
2816 // Try to make this function as atomic as possible. | |
2817 if (Arguments::vfprintf_hook() != NULL) { | |
2818 jio_fprintf(defaultStream::output_stream(), "%s", s); | |
2819 } else { | |
513
2328d1d3f8cf
6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2
xlu
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431
diff
changeset
|
2820 // 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
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diff
changeset
|
2821 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s)); |
0 | 2822 } |
2823 } | |
2824 | |
2825 } // Extern C | |
2826 | |
2827 // java.lang.Thread ////////////////////////////////////////////////////////////////////////////// | |
2828 | |
2829 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock | |
2830 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or | |
2831 // OSThread objects. The exception to this rule is when the target object is the thread | |
2832 // doing the operation, in which case we know that the thread won't exit until the | |
2833 // operation is done (all exits being voluntary). There are a few cases where it is | |
2834 // rather silly to do operations on yourself, like resuming yourself or asking whether | |
2835 // you are alive. While these can still happen, they are not subject to deadlocks if | |
2836 // the lock is held while the operation occurs (this is not the case for suspend, for | |
2837 // instance), and are very unlikely. Because IsAlive needs to be fast and its | |
2838 // implementation is local to this file, we always lock Threads_lock for that one. | |
2839 | |
2840 static void thread_entry(JavaThread* thread, TRAPS) { | |
2841 HandleMark hm(THREAD); | |
2842 Handle obj(THREAD, thread->threadObj()); | |
2843 JavaValue result(T_VOID); | |
2844 JavaCalls::call_virtual(&result, | |
2845 obj, | |
1142 | 2846 KlassHandle(THREAD, SystemDictionary::Thread_klass()), |
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|
2847 vmSymbols::run_method_name(), |
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|
2848 vmSymbols::void_method_signature(), |
0 | 2849 THREAD); |
2850 } | |
2851 | |
2852 | |
2853 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread)) | |
2854 JVMWrapper("JVM_StartThread"); | |
2855 JavaThread *native_thread = NULL; | |
2856 | |
2857 // We cannot hold the Threads_lock when we throw an exception, | |
2858 // due to rank ordering issues. Example: we might need to grab the | |
2859 // Heap_lock while we construct the exception. | |
2860 bool throw_illegal_thread_state = false; | |
2861 | |
2862 // We must release the Threads_lock before we can post a jvmti event | |
2863 // in Thread::start. | |
2864 { | |
2865 // Ensure that the C++ Thread and OSThread structures aren't freed before | |
2866 // we operate. | |
2867 MutexLocker mu(Threads_lock); | |
2868 | |
2162
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2869 // 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
|
2870 // 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
|
2871 // that the JavaThread is null. However for a JNI attached thread |
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6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
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parents:
1980
diff
changeset
|
2872 // 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
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parents:
1980
diff
changeset
|
2873 // (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
|
2874 // 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
|
2875 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
|
2876 throw_illegal_thread_state = true; |
0 | 2877 } else { |
2162
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2878 // 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
|
2879 // 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:
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diff
changeset
|
2880 |
0 | 2881 jlong size = |
2882 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread)); | |
2883 // Allocate the C++ Thread structure and create the native thread. The | |
2884 // stack size retrieved from java is signed, but the constructor takes | |
2885 // size_t (an unsigned type), so avoid passing negative values which would | |
2886 // result in really large stacks. | |
2887 size_t sz = size > 0 ? (size_t) size : 0; | |
2888 native_thread = new JavaThread(&thread_entry, sz); | |
2889 | |
2890 // At this point it may be possible that no osthread was created for the | |
2891 // JavaThread due to lack of memory. Check for this situation and throw | |
2892 // an exception if necessary. Eventually we may want to change this so | |
2893 // that we only grab the lock if the thread was created successfully - | |
2894 // then we can also do this check and throw the exception in the | |
2895 // JavaThread constructor. | |
2896 if (native_thread->osthread() != NULL) { | |
2897 // Note: the current thread is not being used within "prepare". | |
2898 native_thread->prepare(jthread); | |
2899 } | |
2900 } | |
2901 } | |
2902 | |
2903 if (throw_illegal_thread_state) { | |
2904 THROW(vmSymbols::java_lang_IllegalThreadStateException()); | |
2905 } | |
2906 | |
2907 assert(native_thread != NULL, "Starting null thread?"); | |
2908 | |
2909 if (native_thread->osthread() == NULL) { | |
2910 // No one should hold a reference to the 'native_thread'. | |
2911 delete native_thread; | |
2912 if (JvmtiExport::should_post_resource_exhausted()) { | |
2913 JvmtiExport::post_resource_exhausted( | |
2914 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS, | |
2915 "unable to create new native thread"); | |
2916 } | |
2917 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), | |
2918 "unable to create new native thread"); | |
2919 } | |
2920 | |
2921 Thread::start(native_thread); | |
2922 | |
2923 JVM_END | |
2924 | |
2925 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints | |
2926 // before the quasi-asynchronous exception is delivered. This is a little obtrusive, | |
2927 // 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
|
2928 // same thread as the sender, no safepoint is needed. |
0 | 2929 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable)) |
2930 JVMWrapper("JVM_StopThread"); | |
2931 | |
2932 oop java_throwable = JNIHandles::resolve(throwable); | |
2933 if (java_throwable == NULL) { | |
2934 THROW(vmSymbols::java_lang_NullPointerException()); | |
2935 } | |
2936 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2937 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
|
2938 Events::log_exception(JavaThread::current(), |
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4717
diff
changeset
|
2939 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", |
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4717
diff
changeset
|
2940 receiver, (address)java_thread, throwable); |
2162
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
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parents:
1980
diff
changeset
|
2941 // First check if thread is alive |
0 | 2942 if (receiver != NULL) { |
2943 // Check if exception is getting thrown at self (use oop equality, since the | |
2944 // target object might exit) | |
2945 if (java_thread == thread->threadObj()) { | |
2946 THROW_OOP(java_throwable); | |
2947 } else { | |
2948 // Enques a VM_Operation to stop all threads and then deliver the exception... | |
2949 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable)); | |
2950 } | |
2951 } | |
2162
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
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parents:
1980
diff
changeset
|
2952 else { |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2953 // Either: |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2954 // - 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
|
2955 // - 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
|
2956 // 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
|
2957 // 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
|
2958 // 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
|
2959 // 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
|
2960 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
|
2961 } |
0 | 2962 JVM_END |
2963 | |
2964 | |
2965 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread)) | |
2966 JVMWrapper("JVM_IsThreadAlive"); | |
2967 | |
2968 oop thread_oop = JNIHandles::resolve_non_null(jthread); | |
2969 return java_lang_Thread::is_alive(thread_oop); | |
2970 JVM_END | |
2971 | |
2972 | |
2973 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread)) | |
2974 JVMWrapper("JVM_SuspendThread"); | |
2975 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2976 JavaThread* receiver = java_lang_Thread::thread(java_thread); | |
2977 | |
2978 if (receiver != NULL) { | |
2979 // thread has run and has not exited (still on threads list) | |
2980 | |
2981 { | |
2982 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag); | |
2983 if (receiver->is_external_suspend()) { | |
2984 // Don't allow nested external suspend requests. We can't return | |
2985 // an error from this interface so just ignore the problem. | |
2986 return; | |
2987 } | |
2988 if (receiver->is_exiting()) { // thread is in the process of exiting | |
2989 return; | |
2990 } | |
2991 receiver->set_external_suspend(); | |
2992 } | |
2993 | |
2994 // java_suspend() will catch threads in the process of exiting | |
2995 // and will ignore them. | |
2996 receiver->java_suspend(); | |
2997 | |
2998 // It would be nice to have the following assertion in all the | |
2999 // time, but it is possible for a racing resume request to have | |
3000 // resumed this thread right after we suspended it. Temporarily | |
3001 // enable this assertion if you are chasing a different kind of | |
3002 // bug. | |
3003 // | |
3004 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL || | |
3005 // receiver->is_being_ext_suspended(), "thread is not suspended"); | |
3006 } | |
3007 JVM_END | |
3008 | |
3009 | |
3010 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread)) | |
3011 JVMWrapper("JVM_ResumeThread"); | |
3012 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate. | |
3013 // We need to *always* get the threads lock here, since this operation cannot be allowed during | |
3014 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other | |
3015 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code | |
3016 // looks at it. | |
3017 MutexLocker ml(Threads_lock); | |
3018 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
3019 if (thr != NULL) { | |
3020 // the thread has run and is not in the process of exiting | |
3021 thr->java_resume(); | |
3022 } | |
3023 JVM_END | |
3024 | |
3025 | |
3026 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio)) | |
3027 JVMWrapper("JVM_SetThreadPriority"); | |
3028 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
3029 MutexLocker ml(Threads_lock); | |
3030 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
3031 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio); | |
3032 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
3033 if (thr != NULL) { // Thread not yet started; priority pushed down when it is | |
3034 Thread::set_priority(thr, (ThreadPriority)prio); | |
3035 } | |
3036 JVM_END | |
3037 | |
3038 | |
3039 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass)) | |
3040 JVMWrapper("JVM_Yield"); | |
3041 if (os::dont_yield()) return; | |
4006 | 3042 #ifndef USDT2 |
1324
e392695de029
6935224: Adding new DTrace probes to work with Palantir
fparain
parents:
1144
diff
changeset
|
3043 HS_DTRACE_PROBE0(hotspot, thread__yield); |
4006 | 3044 #else /* USDT2 */ |
3045 HOTSPOT_THREAD_YIELD(); | |
3046 #endif /* USDT2 */ | |
0 | 3047 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield. |
3048 // Critical for similar threading behaviour | |
3049 if (ConvertYieldToSleep) { | |
3050 os::sleep(thread, MinSleepInterval, false); | |
3051 } else { | |
3052 os::yield(); | |
3053 } | |
3054 JVM_END | |
3055 | |
3056 | |
3057 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis)) | |
3058 JVMWrapper("JVM_Sleep"); | |
3059 | |
3060 if (millis < 0) { | |
3061 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative"); | |
3062 } | |
3063 | |
3064 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) { | |
3065 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); | |
3066 } | |
3067 | |
3068 // Save current thread state and restore it at the end of this block. | |
3069 // And set new thread state to SLEEPING. | |
3070 JavaThreadSleepState jtss(thread); | |
3071 | |
4006 | 3072 #ifndef USDT2 |
1324
e392695de029
6935224: Adding new DTrace probes to work with Palantir
fparain
parents:
1144
diff
changeset
|
3073 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis); |
4006 | 3074 #else /* USDT2 */ |
3075 HOTSPOT_THREAD_SLEEP_BEGIN( | |
3076 millis); | |
3077 #endif /* USDT2 */ | |
1324
e392695de029
6935224: Adding new DTrace probes to work with Palantir
fparain
parents:
1144
diff
changeset
|
3078 |
10405 | 3079 EventThreadSleep event; |
3080 | |
0 | 3081 if (millis == 0) { |
3082 // When ConvertSleepToYield is on, this matches the classic VM implementation of | |
3083 // JVM_Sleep. Critical for similar threading behaviour (Win32) | |
3084 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep | |
3085 // for SOLARIS | |
3086 if (ConvertSleepToYield) { | |
3087 os::yield(); | |
3088 } else { | |
3089 ThreadState old_state = thread->osthread()->get_state(); | |
3090 thread->osthread()->set_state(SLEEPING); | |
3091 os::sleep(thread, MinSleepInterval, false); | |
3092 thread->osthread()->set_state(old_state); | |
3093 } | |
3094 } else { | |
3095 ThreadState old_state = thread->osthread()->get_state(); | |
3096 thread->osthread()->set_state(SLEEPING); | |
3097 if (os::sleep(thread, millis, true) == OS_INTRPT) { | |
3098 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on | |
3099 // us while we were sleeping. We do not overwrite those. | |
3100 if (!HAS_PENDING_EXCEPTION) { | |
10405 | 3101 if (event.should_commit()) { |
3102 event.set_time(millis); | |
3103 event.commit(); | |
3104 } | |
4006 | 3105 #ifndef USDT2 |
1324
e392695de029
6935224: Adding new DTrace probes to work with Palantir
fparain
parents:
1144
diff
changeset
|
3106 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1); |
4006 | 3107 #else /* USDT2 */ |
3108 HOTSPOT_THREAD_SLEEP_END( | |
3109 1); | |
3110 #endif /* USDT2 */ | |
0 | 3111 // TODO-FIXME: THROW_MSG returns which means we will not call set_state() |
3112 // to properly restore the thread state. That's likely wrong. | |
3113 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); | |
3114 } | |
3115 } | |
3116 thread->osthread()->set_state(old_state); | |
3117 } | |
10405 | 3118 if (event.should_commit()) { |
3119 event.set_time(millis); | |
3120 event.commit(); | |
3121 } | |
4006 | 3122 #ifndef USDT2 |
1324
e392695de029
6935224: Adding new DTrace probes to work with Palantir
fparain
parents:
1144
diff
changeset
|
3123 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0); |
4006 | 3124 #else /* USDT2 */ |
3125 HOTSPOT_THREAD_SLEEP_END( | |
3126 0); | |
3127 #endif /* USDT2 */ | |
0 | 3128 JVM_END |
3129 | |
3130 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) | |
3131 JVMWrapper("JVM_CurrentThread"); | |
3132 oop jthread = thread->threadObj(); | |
3133 assert (thread != NULL, "no current thread!"); | |
3134 return JNIHandles::make_local(env, jthread); | |
3135 JVM_END | |
3136 | |
3137 | |
3138 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread)) | |
3139 JVMWrapper("JVM_CountStackFrames"); | |
3140 | |
3141 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
3142 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
3143 bool throw_illegal_thread_state = false; | |
3144 int count = 0; | |
3145 | |
3146 { | |
3147 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); | |
3148 // We need to re-resolve the java_thread, since a GC might have happened during the | |
3149 // acquire of the lock | |
3150 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
3151 | |
3152 if (thr == NULL) { | |
3153 // do nothing | |
3154 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) { | |
3155 // Check whether this java thread has been suspended already. If not, throws | |
3156 // IllegalThreadStateException. We defer to throw that exception until | |
3157 // Threads_lock is released since loading exception class has to leave VM. | |
3158 // The correct way to test a thread is actually suspended is | |
3159 // wait_for_ext_suspend_completion(), but we can't call that while holding | |
3160 // the Threads_lock. The above tests are sufficient for our purposes | |
3161 // provided the walkability of the stack is stable - which it isn't | |
3162 // 100% but close enough for most practical purposes. | |
3163 throw_illegal_thread_state = true; | |
3164 } else { | |
3165 // Count all java activation, i.e., number of vframes | |
3166 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) { | |
3167 // Native frames are not counted | |
3168 if (!vfst.method()->is_native()) count++; | |
3169 } | |
3170 } | |
3171 } | |
3172 | |
3173 if (throw_illegal_thread_state) { | |
3174 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(), | |
3175 "this thread is not suspended"); | |
3176 } | |
3177 return count; | |
3178 JVM_END | |
3179 | |
3180 // Consider: A better way to implement JVM_Interrupt() is to acquire | |
3181 // Threads_lock to resolve the jthread into a Thread pointer, fetch | |
3182 // Thread->platformevent, Thread->native_thr, Thread->parker, etc., | |
3183 // drop Threads_lock, and the perform the unpark() and thr_kill() operations | |
3184 // outside the critical section. Threads_lock is hot so we want to minimize | |
3185 // the hold-time. A cleaner interface would be to decompose interrupt into | |
3186 // two steps. The 1st phase, performed under Threads_lock, would return | |
3187 // a closure that'd be invoked after Threads_lock was dropped. | |
3188 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and | |
3189 // admit spurious wakeups. | |
3190 | |
3191 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread)) | |
3192 JVMWrapper("JVM_Interrupt"); | |
3193 | |
3194 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
3195 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
3196 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); | |
3197 // We need to re-resolve the java_thread, since a GC might have happened during the | |
3198 // acquire of the lock | |
3199 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
3200 if (thr != NULL) { | |
3201 Thread::interrupt(thr); | |
3202 } | |
3203 JVM_END | |
3204 | |
3205 | |
3206 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted)) | |
3207 JVMWrapper("JVM_IsInterrupted"); | |
3208 | |
3209 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
3210 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
3211 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); | |
3212 // We need to re-resolve the java_thread, since a GC might have happened during the | |
3213 // acquire of the lock | |
3214 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
3215 if (thr == NULL) { | |
3216 return JNI_FALSE; | |
3217 } else { | |
3218 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0); | |
3219 } | |
3220 JVM_END | |
3221 | |
3222 | |
3223 // Return true iff the current thread has locked the object passed in | |
3224 | |
3225 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj)) | |
3226 JVMWrapper("JVM_HoldsLock"); | |
3227 assert(THREAD->is_Java_thread(), "sanity check"); | |
3228 if (obj == NULL) { | |
3229 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
3230 } | |
3231 Handle h_obj(THREAD, JNIHandles::resolve(obj)); | |
3232 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj); | |
3233 JVM_END | |
3234 | |
3235 | |
3236 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass)) | |
3237 JVMWrapper("JVM_DumpAllStacks"); | |
3238 VM_PrintThreads op; | |
3239 VMThread::execute(&op); | |
3240 if (JvmtiExport::should_post_data_dump()) { | |
3241 JvmtiExport::post_data_dump(); | |
3242 } | |
3243 JVM_END | |
3244 | |
4006 | 3245 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name)) |
3246 JVMWrapper("JVM_SetNativeThreadName"); | |
3247 ResourceMark rm(THREAD); | |
3248 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
3249 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
3250 // Thread naming only supported for the current thread, doesn't work for | |
3251 // target threads. | |
3252 if (Thread::current() == thr && !thr->has_attached_via_jni()) { | |
3253 // we don't set the name of an attached thread to avoid stepping | |
3254 // on other programs | |
3255 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); | |
3256 os::set_native_thread_name(thread_name); | |
3257 } | |
3258 JVM_END | |
0 | 3259 |
3260 // java.lang.SecurityManager /////////////////////////////////////////////////////////////////////// | |
3261 | |
3262 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) { | |
3263 assert(jthread->is_Java_thread(), "must be a Java thread"); | |
3264 if (jthread->privileged_stack_top() == NULL) return false; | |
3265 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) { | |
3266 oop loader = jthread->privileged_stack_top()->class_loader(); | |
3267 if (loader == NULL) return true; | |
3268 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); | |
3269 if (trusted) return true; | |
3270 } | |
3271 return false; | |
3272 } | |
3273 | |
3274 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env)) | |
3275 JVMWrapper("JVM_CurrentLoadedClass"); | |
3276 ResourceMark rm(THREAD); | |
3277 | |
3278 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3279 // if a method in a class in a trusted loader is in a doPrivileged, return NULL | |
3280 bool trusted = is_trusted_frame(thread, &vfst); | |
3281 if (trusted) return NULL; | |
3282 | |
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3283 Method* m = vfst.method(); |
0 | 3284 if (!m->is_native()) { |
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3285 InstanceKlass* holder = m->method_holder(); |
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3286 oop loader = holder->class_loader(); |
0 | 3287 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { |
6940
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|
3288 return (jclass) JNIHandles::make_local(env, holder->java_mirror()); |
0 | 3289 } |
3290 } | |
3291 } | |
3292 return NULL; | |
3293 JVM_END | |
3294 | |
3295 | |
3296 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env)) | |
3297 JVMWrapper("JVM_CurrentClassLoader"); | |
3298 ResourceMark rm(THREAD); | |
3299 | |
3300 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3301 | |
3302 // if a method in a class in a trusted loader is in a doPrivileged, return NULL | |
3303 bool trusted = is_trusted_frame(thread, &vfst); | |
3304 if (trusted) return NULL; | |
3305 | |
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3306 Method* m = vfst.method(); |
0 | 3307 if (!m->is_native()) { |
6940
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3308 InstanceKlass* holder = m->method_holder(); |
0 | 3309 assert(holder->is_klass(), "just checking"); |
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3310 oop loader = holder->class_loader(); |
0 | 3311 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { |
3312 return JNIHandles::make_local(env, loader); | |
3313 } | |
3314 } | |
3315 } | |
3316 return NULL; | |
3317 JVM_END | |
3318 | |
3319 | |
3320 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env)) | |
3321 JVMWrapper("JVM_GetClassContext"); | |
3322 ResourceMark rm(THREAD); | |
3323 JvmtiVMObjectAllocEventCollector oam; | |
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3324 vframeStream vfst(thread); |
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|
3325 |
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|
3326 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) { |
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3327 // This must only be called from SecurityManager.getClassContext |
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|
3328 Method* m = vfst.method(); |
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3329 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() && |
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3330 m->name() == vmSymbols::getClassContext_name() && |
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3331 m->signature() == vmSymbols::void_class_array_signature())) { |
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3332 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext"); |
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3333 } |
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|
3334 } |
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|
3335 |
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|
3336 // Collect method holders |
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8010124: JVM_GetClassContext: use GrowableArray instead of KlassLink
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|
3337 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>(); |
8866
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3338 for (; !vfst.at_end(); vfst.security_next()) { |
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|
3339 Method* m = vfst.method(); |
0 | 3340 // Native frames are not returned |
8866
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|
3341 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) { |
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|
3342 Klass* holder = m->method_holder(); |
0 | 3343 assert(holder->is_klass(), "just checking"); |
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changeset
|
3344 klass_array->append(holder); |
0 | 3345 } |
3346 } | |
3347 | |
3348 // Create result array of type [Ljava/lang/Class; | |
11001
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|
3349 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL); |
0 | 3350 // Fill in mirrors corresponding to method holders |
11001
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|
3351 for (int i = 0; i < klass_array->length(); i++) { |
c52abc8a0b08
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changeset
|
3352 result->obj_at_put(i, klass_array->at(i)->java_mirror()); |
0 | 3353 } |
3354 | |
3355 return (jobjectArray) JNIHandles::make_local(env, result); | |
3356 JVM_END | |
3357 | |
3358 | |
3359 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name)) | |
3360 JVMWrapper("JVM_ClassDepth"); | |
3361 ResourceMark rm(THREAD); | |
3362 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); | |
3363 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0); | |
3364 | |
3365 const char* str = java_lang_String::as_utf8_string(class_name_str()); | |
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3366 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str)); |
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|
3367 if (class_name_sym == NULL) { |
0 | 3368 return -1; |
3369 } | |
3370 | |
3371 int depth = 0; | |
3372 | |
3373 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3374 if (!vfst.method()->is_native()) { | |
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changeset
|
3375 InstanceKlass* holder = vfst.method()->method_holder(); |
0 | 3376 assert(holder->is_klass(), "just checking"); |
6940
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changeset
|
3377 if (holder->name() == class_name_sym) { |
0 | 3378 return depth; |
3379 } | |
3380 depth++; | |
3381 } | |
3382 } | |
3383 return -1; | |
3384 JVM_END | |
3385 | |
3386 | |
3387 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env)) | |
3388 JVMWrapper("JVM_ClassLoaderDepth"); | |
3389 ResourceMark rm(THREAD); | |
3390 int depth = 0; | |
3391 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3392 // if a method in a class in a trusted loader is in a doPrivileged, return -1 | |
3393 bool trusted = is_trusted_frame(thread, &vfst); | |
3394 if (trusted) return -1; | |
3395 | |
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3396 Method* m = vfst.method(); |
0 | 3397 if (!m->is_native()) { |
6940
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changeset
|
3398 InstanceKlass* holder = m->method_holder(); |
0 | 3399 assert(holder->is_klass(), "just checking"); |
6940
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|
3400 oop loader = holder->class_loader(); |
0 | 3401 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { |
3402 return depth; | |
3403 } | |
3404 depth++; | |
3405 } | |
3406 } | |
3407 return -1; | |
3408 JVM_END | |
3409 | |
3410 | |
3411 // java.lang.Package //////////////////////////////////////////////////////////////// | |
3412 | |
3413 | |
3414 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name)) | |
3415 JVMWrapper("JVM_GetSystemPackage"); | |
3416 ResourceMark rm(THREAD); | |
3417 JvmtiVMObjectAllocEventCollector oam; | |
3418 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); | |
3419 oop result = ClassLoader::get_system_package(str, CHECK_NULL); | |
3420 return (jstring) JNIHandles::make_local(result); | |
3421 JVM_END | |
3422 | |
3423 | |
3424 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env)) | |
3425 JVMWrapper("JVM_GetSystemPackages"); | |
3426 JvmtiVMObjectAllocEventCollector oam; | |
3427 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL); | |
3428 return (jobjectArray) JNIHandles::make_local(result); | |
3429 JVM_END | |
3430 | |
3431 | |
3432 // ObjectInputStream /////////////////////////////////////////////////////////////// | |
3433 | |
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3434 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) { |
0 | 3435 if (current_class == NULL) { |
3436 return true; | |
3437 } | |
3438 if ((current_class == field_class) || access.is_public()) { | |
3439 return true; | |
3440 } | |
3441 | |
3442 if (access.is_protected()) { | |
3443 // See if current_class is a subclass of field_class | |
6983 | 3444 if (current_class->is_subclass_of(field_class)) { |
0 | 3445 return true; |
3446 } | |
3447 } | |
3448 | |
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3449 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class)); |
0 | 3450 } |
3451 | |
3452 | |
3453 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4 | |
3454 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass)) | |
3455 JVMWrapper("JVM_AllocateNewObject"); | |
3456 JvmtiVMObjectAllocEventCollector oam; | |
3457 // Receiver is not used | |
3458 oop curr_mirror = JNIHandles::resolve_non_null(currClass); | |
3459 oop init_mirror = JNIHandles::resolve_non_null(initClass); | |
3460 | |
3461 // Cannot instantiate primitive types | |
3462 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) { | |
3463 ResourceMark rm(THREAD); | |
3464 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3465 } | |
3466 | |
3467 // Arrays not allowed here, must use JVM_AllocateNewArray | |
6983 | 3468 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() || |
3469 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) { | |
0 | 3470 ResourceMark rm(THREAD); |
3471 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3472 } | |
3473 | |
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|
3474 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror)); |
da91efe96a93
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changeset
|
3475 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror)); |
0 | 3476 |
3477 assert(curr_klass->is_subclass_of(init_klass()), "just checking"); | |
3478 | |
3479 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly. | |
3480 curr_klass->check_valid_for_instantiation(false, CHECK_NULL); | |
3481 | |
3482 // Make sure klass is initialized, since we are about to instantiate one of them. | |
3483 curr_klass->initialize(CHECK_NULL); | |
3484 | |
3485 methodHandle m (THREAD, | |
3486 init_klass->find_method(vmSymbols::object_initializer_name(), | |
3487 vmSymbols::void_method_signature())); | |
3488 if (m.is_null()) { | |
3489 ResourceMark rm(THREAD); | |
3490 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), | |
6983 | 3491 Method::name_and_sig_as_C_string(init_klass(), |
0 | 3492 vmSymbols::object_initializer_name(), |
3493 vmSymbols::void_method_signature())); | |
3494 } | |
3495 | |
3496 if (curr_klass == init_klass && !m->is_public()) { | |
3497 // Calling the constructor for class 'curr_klass'. | |
3498 // Only allow calls to a public no-arg constructor. | |
3499 // This path corresponds to creating an Externalizable object. | |
3500 THROW_0(vmSymbols::java_lang_IllegalAccessException()); | |
3501 } | |
3502 | |
3503 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) { | |
3504 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb' | |
3505 THROW_0(vmSymbols::java_lang_IllegalAccessException()); | |
3506 } | |
3507 | |
3508 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL); | |
3509 // Call constructor m. This might call a constructor higher up in the hierachy | |
3510 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL); | |
3511 | |
3512 return JNIHandles::make_local(obj()); | |
3513 JVM_END | |
3514 | |
3515 | |
3516 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length)) | |
3517 JVMWrapper("JVM_AllocateNewArray"); | |
3518 JvmtiVMObjectAllocEventCollector oam; | |
3519 oop mirror = JNIHandles::resolve_non_null(currClass); | |
3520 | |
3521 if (java_lang_Class::is_primitive(mirror)) { | |
3522 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3523 } | |
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|
3524 Klass* k = java_lang_Class::as_Klass(mirror); |
0 | 3525 oop result; |
3526 | |
6725
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|
3527 if (k->oop_is_typeArray()) { |
0 | 3528 // typeArray |
6831
d8ce2825b193
8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
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6725
diff
changeset
|
3529 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL); |
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diff
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|
3530 } else if (k->oop_is_objArray()) { |
0 | 3531 // objArray |
6831
d8ce2825b193
8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
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changeset
|
3532 ObjArrayKlass* oak = ObjArrayKlass::cast(k); |
0 | 3533 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior) |
3534 result = oak->allocate(length, CHECK_NULL); | |
3535 } else { | |
3536 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3537 } | |
3538 return JNIHandles::make_local(env, result); | |
3539 JVM_END | |
3540 | |
3541 | |
3542 // Return the first non-null class loader up the execution stack, or null | |
3543 // if only code from the null class loader is on the stack. | |
3544 | |
3545 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env)) | |
3546 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3547 // UseNewReflection | |
3548 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection | |
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diff
changeset
|
3549 oop loader = vfst.method()->method_holder()->class_loader(); |
0 | 3550 if (loader != NULL) { |
3551 return JNIHandles::make_local(env, loader); | |
3552 } | |
3553 } | |
3554 return NULL; | |
3555 JVM_END | |
3556 | |
3557 | |
3558 // Load a class relative to the most recent class on the stack with a non-null | |
3559 // classloader. | |
3560 // This function has been deprecated and should not be considered part of the | |
3561 // specified JVM interface. | |
3562 | |
3563 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver, | |
3564 jclass currClass, jstring currClassName)) | |
3565 JVMWrapper("JVM_LoadClass0"); | |
3566 // Receiver is not used | |
3567 ResourceMark rm(THREAD); | |
3568 | |
3569 // Class name argument is not guaranteed to be in internal format | |
3570 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName)); | |
3571 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL); | |
3572 | |
3573 const char* str = java_lang_String::as_utf8_string(string()); | |
3574 | |
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|
3575 if (str == NULL || (int)strlen(str) > Symbol::max_length()) { |
0 | 3576 // It's impossible to create this class; the name cannot fit |
3577 // into the constant pool. | |
3578 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str); | |
3579 } | |
3580 | |
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changeset
|
3581 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL); |
0 | 3582 Handle curr_klass (THREAD, JNIHandles::resolve(currClass)); |
3583 // Find the most recent class on the stack with a non-null classloader | |
3584 oop loader = NULL; | |
3585 oop protection_domain = NULL; | |
3586 if (curr_klass.is_null()) { | |
3587 for (vframeStream vfst(thread); | |
3588 !vfst.at_end() && loader == NULL; | |
3589 vfst.next()) { | |
3590 if (!vfst.method()->is_native()) { | |
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8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
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diff
changeset
|
3591 InstanceKlass* holder = vfst.method()->method_holder(); |
18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
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diff
changeset
|
3592 loader = holder->class_loader(); |
18fb7da42534
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changeset
|
3593 protection_domain = holder->protection_domain(); |
0 | 3594 } |
3595 } | |
3596 } else { | |
6725
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3597 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass()); |
da91efe96a93
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3598 loader = InstanceKlass::cast(curr_klass_oop)->class_loader(); |
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3599 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain(); |
0 | 3600 } |
3601 Handle h_loader(THREAD, loader); | |
3602 Handle h_prot (THREAD, protection_domain); | |
657
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3603 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot, |
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
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parents:
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changeset
|
3604 false, thread); |
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
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diff
changeset
|
3605 if (TraceClassResolution && result != NULL) { |
6725
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3606 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); |
657
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|
3607 } |
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|
3608 return result; |
0 | 3609 JVM_END |
3610 | |
3611 | |
3612 // Array /////////////////////////////////////////////////////////////////////////////////////////// | |
3613 | |
3614 | |
3615 // resolve array handle and check arguments | |
3616 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) { | |
3617 if (arr == NULL) { | |
3618 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
3619 } | |
3620 oop a = JNIHandles::resolve_non_null(arr); | |
6725
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3621 if (!a->is_array() || (type_array_only && !a->is_typeArray())) { |
0 | 3622 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array"); |
3623 } | |
3624 return arrayOop(a); | |
3625 } | |
3626 | |
3627 | |
3628 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr)) | |
3629 JVMWrapper("JVM_GetArrayLength"); | |
3630 arrayOop a = check_array(env, arr, false, CHECK_0); | |
3631 return a->length(); | |
3632 JVM_END | |
3633 | |
3634 | |
3635 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index)) | |
3636 JVMWrapper("JVM_Array_Get"); | |
3637 JvmtiVMObjectAllocEventCollector oam; | |
3638 arrayOop a = check_array(env, arr, false, CHECK_NULL); | |
3639 jvalue value; | |
3640 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL); | |
3641 oop box = Reflection::box(&value, type, CHECK_NULL); | |
3642 return JNIHandles::make_local(env, box); | |
3643 JVM_END | |
3644 | |
3645 | |
3646 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode)) | |
3647 JVMWrapper("JVM_GetPrimitiveArrayElement"); | |
3648 jvalue value; | |
3649 value.i = 0; // to initialize value before getting used in CHECK | |
3650 arrayOop a = check_array(env, arr, true, CHECK_(value)); | |
3651 assert(a->is_typeArray(), "just checking"); | |
3652 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value)); | |
3653 BasicType wide_type = (BasicType) wCode; | |
3654 if (type != wide_type) { | |
3655 Reflection::widen(&value, type, wide_type, CHECK_(value)); | |
3656 } | |
3657 return value; | |
3658 JVM_END | |
3659 | |
3660 | |
3661 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val)) | |
3662 JVMWrapper("JVM_SetArrayElement"); | |
3663 arrayOop a = check_array(env, arr, false, CHECK); | |
3664 oop box = JNIHandles::resolve(val); | |
3665 jvalue value; | |
3666 value.i = 0; // to initialize value before getting used in CHECK | |
3667 BasicType value_type; | |
3668 if (a->is_objArray()) { | |
3669 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array | |
3670 value_type = Reflection::unbox_for_regular_object(box, &value); | |
3671 } else { | |
3672 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); | |
3673 } | |
3674 Reflection::array_set(&value, a, index, value_type, CHECK); | |
3675 JVM_END | |
3676 | |
3677 | |
3678 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode)) | |
3679 JVMWrapper("JVM_SetPrimitiveArrayElement"); | |
3680 arrayOop a = check_array(env, arr, true, CHECK); | |
3681 assert(a->is_typeArray(), "just checking"); | |
3682 BasicType value_type = (BasicType) vCode; | |
3683 Reflection::array_set(&v, a, index, value_type, CHECK); | |
3684 JVM_END | |
3685 | |
3686 | |
3687 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length)) | |
3688 JVMWrapper("JVM_NewArray"); | |
3689 JvmtiVMObjectAllocEventCollector oam; | |
3690 oop element_mirror = JNIHandles::resolve(eltClass); | |
3691 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL); | |
3692 return JNIHandles::make_local(env, result); | |
3693 JVM_END | |
3694 | |
3695 | |
3696 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim)) | |
3697 JVMWrapper("JVM_NewMultiArray"); | |
3698 JvmtiVMObjectAllocEventCollector oam; | |
3699 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL); | |
3700 oop element_mirror = JNIHandles::resolve(eltClass); | |
3701 assert(dim_array->is_typeArray(), "just checking"); | |
3702 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL); | |
3703 return JNIHandles::make_local(env, result); | |
3704 JVM_END | |
3705 | |
3706 | |
3707 // Networking library support //////////////////////////////////////////////////////////////////// | |
3708 | |
3709 JVM_LEAF(jint, JVM_InitializeSocketLibrary()) | |
3710 JVMWrapper("JVM_InitializeSocketLibrary"); | |
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6348631: remove the use of the HPI library from Hotspot
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diff
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|
3711 return 0; |
0 | 3712 JVM_END |
3713 | |
3714 | |
3715 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol)) | |
3716 JVMWrapper("JVM_Socket"); | |
1980
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diff
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|
3717 return os::socket(domain, type, protocol); |
0 | 3718 JVM_END |
3719 | |
3720 | |
3721 JVM_LEAF(jint, JVM_SocketClose(jint fd)) | |
3722 JVMWrapper2("JVM_SocketClose (0x%x)", fd); | |
3723 //%note jvm_r6 | |
1980
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diff
changeset
|
3724 return os::socket_close(fd); |
0 | 3725 JVM_END |
3726 | |
3727 | |
3728 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto)) | |
3729 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd); | |
3730 //%note jvm_r6 | |
1980
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6348631: remove the use of the HPI library from Hotspot
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diff
changeset
|
3731 return os::socket_shutdown(fd, howto); |
0 | 3732 JVM_END |
3733 | |
3734 | |
3735 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags)) | |
3736 JVMWrapper2("JVM_Recv (0x%x)", fd); | |
3737 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
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diff
changeset
|
3738 return os::recv(fd, buf, (size_t)nBytes, (uint)flags); |
0 | 3739 JVM_END |
3740 | |
3741 | |
3742 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags)) | |
3743 JVMWrapper2("JVM_Send (0x%x)", fd); | |
3744 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
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diff
changeset
|
3745 return os::send(fd, buf, (size_t)nBytes, (uint)flags); |
0 | 3746 JVM_END |
3747 | |
3748 | |
3749 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout)) | |
3750 JVMWrapper2("JVM_Timeout (0x%x)", fd); | |
3751 //%note jvm_r6 | |
1980
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ikrylov
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diff
changeset
|
3752 return os::timeout(fd, timeout); |
0 | 3753 JVM_END |
3754 | |
3755 | |
3756 JVM_LEAF(jint, JVM_Listen(jint fd, jint count)) | |
3757 JVMWrapper2("JVM_Listen (0x%x)", fd); | |
3758 //%note jvm_r6 | |
1980
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ikrylov
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diff
changeset
|
3759 return os::listen(fd, count); |
0 | 3760 JVM_END |
3761 | |
3762 | |
3763 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len)) | |
3764 JVMWrapper2("JVM_Connect (0x%x)", fd); | |
3765 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3766 return os::connect(fd, him, (socklen_t)len); |
0 | 3767 JVM_END |
3768 | |
3769 | |
3770 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len)) | |
3771 JVMWrapper2("JVM_Bind (0x%x)", fd); | |
3772 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3773 return os::bind(fd, him, (socklen_t)len); |
0 | 3774 JVM_END |
3775 | |
3776 | |
3777 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len)) | |
3778 JVMWrapper2("JVM_Accept (0x%x)", fd); | |
3779 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3780 socklen_t socklen = (socklen_t)(*len); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3781 jint result = os::accept(fd, him, &socklen); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
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diff
changeset
|
3782 *len = (jint)socklen; |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3783 return result; |
0 | 3784 JVM_END |
3785 | |
3786 | |
3787 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen)) | |
3788 JVMWrapper2("JVM_RecvFrom (0x%x)", fd); | |
3789 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3790 socklen_t socklen = (socklen_t)(*fromlen); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
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diff
changeset
|
3791 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:
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diff
changeset
|
3792 *fromlen = (int)socklen; |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
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diff
changeset
|
3793 return result; |
0 | 3794 JVM_END |
3795 | |
3796 | |
3797 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len)) | |
3798 JVMWrapper2("JVM_GetSockName (0x%x)", fd); | |
3799 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3800 socklen_t socklen = (socklen_t)(*len); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
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diff
changeset
|
3801 jint result = os::get_sock_name(fd, him, &socklen); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
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diff
changeset
|
3802 *len = (int)socklen; |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
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diff
changeset
|
3803 return result; |
0 | 3804 JVM_END |
3805 | |
3806 | |
3807 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen)) | |
3808 JVMWrapper2("JVM_SendTo (0x%x)", fd); | |
3809 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3810 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen); |
0 | 3811 JVM_END |
3812 | |
3813 | |
3814 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes)) | |
3815 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd); | |
3816 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3817 return os::socket_available(fd, pbytes); |
0 | 3818 JVM_END |
3819 | |
3820 | |
3821 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen)) | |
3822 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); | |
3823 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3824 socklen_t socklen = (socklen_t)(*optlen); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3825 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3826 *optlen = (int)socklen; |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3827 return result; |
0 | 3828 JVM_END |
3829 | |
3830 | |
3831 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen)) | |
3832 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); | |
3833 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3834 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen); |
0 | 3835 JVM_END |
3836 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
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diff
changeset
|
3837 |
0 | 3838 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen)) |
3839 JVMWrapper("JVM_GetHostName"); | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
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diff
changeset
|
3840 return os::get_host_name(name, namelen); |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3841 JVM_END |
0 | 3842 |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
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diff
changeset
|
3843 |
0 | 3844 // Library support /////////////////////////////////////////////////////////////////////////// |
3845 | |
3846 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name)) | |
3847 //%note jvm_ct | |
3848 JVMWrapper2("JVM_LoadLibrary (%s)", name); | |
3849 char ebuf[1024]; | |
3850 void *load_result; | |
3851 { | |
3852 ThreadToNativeFromVM ttnfvm(thread); | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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diff
changeset
|
3853 load_result = os::dll_load(name, ebuf, sizeof ebuf); |
0 | 3854 } |
3855 if (load_result == NULL) { | |
3856 char msg[1024]; | |
3857 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf); | |
3858 // Since 'ebuf' may contain a string encoded using | |
3859 // platform encoding scheme, we need to pass | |
3860 // Exceptions::unsafe_to_utf8 to the new_exception method | |
3861 // as the last argument. See bug 6367357. | |
3862 Handle h_exception = | |
3863 Exceptions::new_exception(thread, | |
3864 vmSymbols::java_lang_UnsatisfiedLinkError(), | |
3865 msg, Exceptions::unsafe_to_utf8); | |
3866 | |
3867 THROW_HANDLE_0(h_exception); | |
3868 } | |
3869 return load_result; | |
3870 JVM_END | |
3871 | |
3872 | |
3873 JVM_LEAF(void, JVM_UnloadLibrary(void* handle)) | |
3874 JVMWrapper("JVM_UnloadLibrary"); | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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diff
changeset
|
3875 os::dll_unload(handle); |
0 | 3876 JVM_END |
3877 | |
3878 | |
3879 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name)) | |
3880 JVMWrapper2("JVM_FindLibraryEntry (%s)", name); | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3881 return os::dll_lookup(handle, name); |
0 | 3882 JVM_END |
3883 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
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diff
changeset
|
3884 |
0 | 3885 // Floating point support //////////////////////////////////////////////////////////////////// |
3886 | |
3887 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a)) | |
3888 JVMWrapper("JVM_IsNaN"); | |
3889 return g_isnan(a); | |
3890 JVM_END | |
3891 | |
3892 | |
3893 // JNI version /////////////////////////////////////////////////////////////////////////////// | |
3894 | |
3895 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version)) | |
3896 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version); | |
3897 return Threads::is_supported_jni_version_including_1_1(version); | |
3898 JVM_END | |
3899 | |
3900 | |
3901 // String support /////////////////////////////////////////////////////////////////////////// | |
3902 | |
3903 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str)) | |
3904 JVMWrapper("JVM_InternString"); | |
3905 JvmtiVMObjectAllocEventCollector oam; | |
3906 if (str == NULL) return NULL; | |
3907 oop string = JNIHandles::resolve_non_null(str); | |
3908 oop result = StringTable::intern(string, CHECK_NULL); | |
3909 return (jstring) JNIHandles::make_local(env, result); | |
3910 JVM_END | |
3911 | |
3912 | |
3913 // Raw monitor support ////////////////////////////////////////////////////////////////////// | |
3914 | |
3915 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock | |
3916 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because | |
3917 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check | |
3918 // that only works with java threads. | |
3919 | |
3920 | |
3921 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) { | |
3922 VM_Exit::block_if_vm_exited(); | |
3923 JVMWrapper("JVM_RawMonitorCreate"); | |
3924 return new Mutex(Mutex::native, "JVM_RawMonitorCreate"); | |
3925 } | |
3926 | |
3927 | |
3928 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) { | |
3929 VM_Exit::block_if_vm_exited(); | |
3930 JVMWrapper("JVM_RawMonitorDestroy"); | |
3931 delete ((Mutex*) mon); | |
3932 } | |
3933 | |
3934 | |
3935 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) { | |
3936 VM_Exit::block_if_vm_exited(); | |
3937 JVMWrapper("JVM_RawMonitorEnter"); | |
3938 ((Mutex*) mon)->jvm_raw_lock(); | |
3939 return 0; | |
3940 } | |
3941 | |
3942 | |
3943 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) { | |
3944 VM_Exit::block_if_vm_exited(); | |
3945 JVMWrapper("JVM_RawMonitorExit"); | |
3946 ((Mutex*) mon)->jvm_raw_unlock(); | |
3947 } | |
3948 | |
3949 | |
3950 // Support for Serialization | |
3951 | |
3952 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value); | |
3953 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value); | |
3954 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value); | |
3955 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value); | |
3956 | |
3957 static IntBitsToFloatFn int_bits_to_float_fn = NULL; | |
3958 static LongBitsToDoubleFn long_bits_to_double_fn = NULL; | |
3959 static FloatToIntBitsFn float_to_int_bits_fn = NULL; | |
3960 static DoubleToLongBitsFn double_to_long_bits_fn = NULL; | |
3961 | |
3962 | |
3963 void initialize_converter_functions() { | |
3964 if (JDK_Version::is_gte_jdk14x_version()) { | |
3965 // These functions only exist for compatibility with 1.3.1 and earlier | |
3966 return; | |
3967 } | |
3968 | |
3969 // called from universe_post_init() | |
3970 assert( | |
3971 int_bits_to_float_fn == NULL && | |
3972 long_bits_to_double_fn == NULL && | |
3973 float_to_int_bits_fn == NULL && | |
3974 double_to_long_bits_fn == NULL , | |
3975 "initialization done twice" | |
3976 ); | |
3977 // initialize | |
3978 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F")); | |
3979 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D")); | |
3980 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I")); | |
3981 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J")); | |
3982 // verify | |
3983 assert( | |
3984 int_bits_to_float_fn != NULL && | |
3985 long_bits_to_double_fn != NULL && | |
3986 float_to_int_bits_fn != NULL && | |
3987 double_to_long_bits_fn != NULL , | |
3988 "initialization failed" | |
3989 ); | |
3990 } | |
3991 | |
3992 | |
3993 | |
3994 // Shared JNI/JVM entry points ////////////////////////////////////////////////////////////// | |
3995 | |
18051 | 3996 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, |
3997 Handle loader, Handle protection_domain, | |
3998 jboolean throwError, TRAPS) { | |
0 | 3999 // Security Note: |
4000 // The Java level wrapper will perform the necessary security check allowing | |
18051 | 4001 // us to pass the NULL as the initiating class loader. The VM is responsible for |
4002 // the checkPackageAccess relative to the initiating class loader via the | |
4003 // protection_domain. The protection_domain is passed as NULL by the java code | |
4004 // if there is no security manager in 3-arg Class.forName(). | |
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4005 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL); |
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4006 |
0 | 4007 KlassHandle klass_handle(THREAD, klass); |
4008 // Check if we should initialize the class | |
4009 if (init && klass_handle->oop_is_instance()) { | |
4010 klass_handle->initialize(CHECK_NULL); | |
4011 } | |
4012 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror()); | |
4013 } | |
4014 | |
4015 | |
4016 // Internal SQE debugging support /////////////////////////////////////////////////////////// | |
4017 | |
4018 #ifndef PRODUCT | |
4019 | |
4020 extern "C" { | |
4021 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get); | |
4022 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get); | |
4023 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj); | |
4024 } | |
4025 | |
4026 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get)) | |
4027 JVMWrapper("JVM_AccessBoolVMFlag"); | |
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4028 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, Flag::INTERNAL); |
0 | 4029 JVM_END |
4030 | |
4031 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get)) | |
4032 JVMWrapper("JVM_AccessVMIntFlag"); | |
4033 intx v; | |
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4034 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, Flag::INTERNAL); |
0 | 4035 *value = (jint)v; |
4036 return result; | |
4037 JVM_END | |
4038 | |
4039 | |
4040 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj)) | |
4041 JVMWrapper("JVM_VMBreakPoint"); | |
4042 oop the_obj = JNIHandles::resolve(obj); | |
4043 BREAKPOINT; | |
4044 JVM_END | |
4045 | |
4046 | |
4047 #endif | |
4048 | |
4049 | |
4050 // Method /////////////////////////////////////////////////////////////////////////////////////////// | |
4051 | |
4052 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0)) | |
4053 JVMWrapper("JVM_InvokeMethod"); | |
4054 Handle method_handle; | |
4055 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) { | |
4056 method_handle = Handle(THREAD, JNIHandles::resolve(method)); | |
4057 Handle receiver(THREAD, JNIHandles::resolve(obj)); | |
4058 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); | |
4059 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL); | |
4060 jobject res = JNIHandles::make_local(env, result); | |
4061 if (JvmtiExport::should_post_vm_object_alloc()) { | |
4062 oop ret_type = java_lang_reflect_Method::return_type(method_handle()); | |
4063 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!"); | |
4064 if (java_lang_Class::is_primitive(ret_type)) { | |
4065 // Only for primitive type vm allocates memory for java object. | |
4066 // See box() method. | |
4067 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); | |
4068 } | |
4069 } | |
4070 return res; | |
4071 } else { | |
4072 THROW_0(vmSymbols::java_lang_StackOverflowError()); | |
4073 } | |
4074 JVM_END | |
4075 | |
4076 | |
4077 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0)) | |
4078 JVMWrapper("JVM_NewInstanceFromConstructor"); | |
4079 oop constructor_mirror = JNIHandles::resolve(c); | |
4080 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); | |
4081 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL); | |
4082 jobject res = JNIHandles::make_local(env, result); | |
4083 if (JvmtiExport::should_post_vm_object_alloc()) { | |
4084 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); | |
4085 } | |
4086 return res; | |
4087 JVM_END | |
4088 | |
4089 // Atomic /////////////////////////////////////////////////////////////////////////////////////////// | |
4090 | |
4091 JVM_LEAF(jboolean, JVM_SupportsCX8()) | |
4092 JVMWrapper("JVM_SupportsCX8"); | |
4093 return VM_Version::supports_cx8(); | |
4094 JVM_END | |
4095 | |
4096 | |
4097 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal)) | |
4098 JVMWrapper("JVM_CX8Field"); | |
4099 jlong res; | |
4100 oop o = JNIHandles::resolve(obj); | |
4101 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); | |
4102 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs); | |
4103 | |
4104 assert(VM_Version::supports_cx8(), "cx8 not supported"); | |
4105 res = Atomic::cmpxchg(newVal, addr, oldVal); | |
4106 | |
4107 return res == oldVal; | |
4108 JVM_END | |
4109 | |
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4110 // DTrace /////////////////////////////////////////////////////////////////// |
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4111 |
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4112 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env)) |
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4113 JVMWrapper("JVM_DTraceGetVersion"); |
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4114 return (jint)JVM_TRACING_DTRACE_VERSION; |
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4115 JVM_END |
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4116 |
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4117 JVM_ENTRY(jlong,JVM_DTraceActivate( |
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4118 JNIEnv* env, jint version, jstring module_name, jint providers_count, |
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4119 JVM_DTraceProvider* providers)) |
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4120 JVMWrapper("JVM_DTraceActivate"); |
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4121 return DTraceJSDT::activate( |
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4122 version, module_name, providers_count, providers, CHECK_0); |
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4123 JVM_END |
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4124 |
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4125 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method)) |
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4126 JVMWrapper("JVM_DTraceIsProbeEnabled"); |
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4127 return DTraceJSDT::is_probe_enabled(method); |
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4128 JVM_END |
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4129 |
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4130 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle)) |
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4131 JVMWrapper("JVM_DTraceDispose"); |
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4132 DTraceJSDT::dispose(handle); |
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4133 JVM_END |
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4134 |
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4135 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env)) |
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4136 JVMWrapper("JVM_DTraceIsSupported"); |
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4137 return DTraceJSDT::is_supported(); |
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4138 JVM_END |
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4139 |
0 | 4140 // Returns an array of all live Thread objects (VM internal JavaThreads, |
4141 // jvmti agent threads, and JNI attaching threads are skipped) | |
4142 // See CR 6404306 regarding JNI attaching threads | |
4143 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy)) | |
4144 ResourceMark rm(THREAD); | |
4145 ThreadsListEnumerator tle(THREAD, false, false); | |
4146 JvmtiVMObjectAllocEventCollector oam; | |
4147 | |
4148 int num_threads = tle.num_threads(); | |
1142 | 4149 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL); |
0 | 4150 objArrayHandle threads_ah(THREAD, r); |
4151 | |
4152 for (int i = 0; i < num_threads; i++) { | |
4153 Handle h = tle.get_threadObj(i); | |
4154 threads_ah->obj_at_put(i, h()); | |
4155 } | |
4156 | |
4157 return (jobjectArray) JNIHandles::make_local(env, threads_ah()); | |
4158 JVM_END | |
4159 | |
4160 | |
4161 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods | |
4162 // Return StackTraceElement[][], each element is the stack trace of a thread in | |
4163 // the corresponding entry in the given threads array | |
4164 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads)) | |
4165 JVMWrapper("JVM_DumpThreads"); | |
4166 JvmtiVMObjectAllocEventCollector oam; | |
4167 | |
4168 // Check if threads is null | |
4169 if (threads == NULL) { | |
4170 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
4171 } | |
4172 | |
4173 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads)); | |
4174 objArrayHandle ah(THREAD, a); | |
4175 int num_threads = ah->length(); | |
4176 // check if threads is non-empty array | |
4177 if (num_threads == 0) { | |
4178 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); | |
4179 } | |
4180 | |
4181 // check if threads is not an array of objects of Thread class | |
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4182 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass(); |
1142 | 4183 if (k != SystemDictionary::Thread_klass()) { |
0 | 4184 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); |
4185 } | |
4186 | |
4187 ResourceMark rm(THREAD); | |
4188 | |
4189 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); | |
4190 for (int i = 0; i < num_threads; i++) { | |
4191 oop thread_obj = ah->obj_at(i); | |
4192 instanceHandle h(THREAD, (instanceOop) thread_obj); | |
4193 thread_handle_array->append(h); | |
4194 } | |
4195 | |
4196 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL); | |
4197 return (jobjectArray)JNIHandles::make_local(env, stacktraces()); | |
4198 | |
4199 JVM_END | |
4200 | |
4201 // JVM monitoring and management support | |
4202 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version)) | |
4203 return Management::get_jmm_interface(version); | |
4204 JVM_END | |
4205 | |
4206 // com.sun.tools.attach.VirtualMachine agent properties support | |
4207 // | |
4208 // Initialize the agent properties with the properties maintained in the VM | |
4209 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties)) | |
4210 JVMWrapper("JVM_InitAgentProperties"); | |
4211 ResourceMark rm; | |
4212 | |
4213 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); | |
4214 | |
4215 PUTPROP(props, "sun.java.command", Arguments::java_command()); | |
4216 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags()); | |
4217 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args()); | |
4218 return properties; | |
4219 JVM_END | |
4220 | |
4221 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass)) | |
4222 { | |
4223 JVMWrapper("JVM_GetEnclosingMethodInfo"); | |
4224 JvmtiVMObjectAllocEventCollector oam; | |
4225 | |
4226 if (ofClass == NULL) { | |
4227 return NULL; | |
4228 } | |
4229 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass)); | |
4230 // Special handling for primitive objects | |
4231 if (java_lang_Class::is_primitive(mirror())) { | |
4232 return NULL; | |
4233 } | |
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4234 Klass* k = java_lang_Class::as_Klass(mirror()); |
6983 | 4235 if (!k->oop_is_instance()) { |
0 | 4236 return NULL; |
4237 } | |
4238 instanceKlassHandle ik_h(THREAD, k); | |
4239 int encl_method_class_idx = ik_h->enclosing_method_class_index(); | |
4240 if (encl_method_class_idx == 0) { | |
4241 return NULL; | |
4242 } | |
1142 | 4243 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL); |
0 | 4244 objArrayHandle dest(THREAD, dest_o); |
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4245 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL); |
6983 | 4246 dest->obj_at_put(0, enc_k->java_mirror()); |
0 | 4247 int encl_method_method_idx = ik_h->enclosing_method_method_index(); |
4248 if (encl_method_method_idx != 0) { | |
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4249 Symbol* sym = ik_h->constants()->symbol_at( |
0 | 4250 extract_low_short_from_int( |
4251 ik_h->constants()->name_and_type_at(encl_method_method_idx))); | |
4252 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); | |
4253 dest->obj_at_put(1, str()); | |
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4254 sym = ik_h->constants()->symbol_at( |
0 | 4255 extract_high_short_from_int( |
4256 ik_h->constants()->name_and_type_at(encl_method_method_idx))); | |
4257 str = java_lang_String::create_from_symbol(sym, CHECK_NULL); | |
4258 dest->obj_at_put(2, str()); | |
4259 } | |
4260 return (jobjectArray) JNIHandles::make_local(dest()); | |
4261 } | |
4262 JVM_END | |
4263 | |
4264 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env, | |
4265 jint javaThreadState)) | |
4266 { | |
4267 // If new thread states are added in future JDK and VM versions, | |
4268 // this should check if the JDK version is compatible with thread | |
4269 // states supported by the VM. Return NULL if not compatible. | |
4270 // | |
4271 // This function must map the VM java_lang_Thread::ThreadStatus | |
4272 // to the Java thread state that the JDK supports. | |
4273 // | |
4274 | |
4275 typeArrayHandle values_h; | |
4276 switch (javaThreadState) { | |
4277 case JAVA_THREAD_STATE_NEW : { | |
4278 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4279 values_h = typeArrayHandle(THREAD, r); | |
4280 values_h->int_at_put(0, java_lang_Thread::NEW); | |
4281 break; | |
4282 } | |
4283 case JAVA_THREAD_STATE_RUNNABLE : { | |
4284 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4285 values_h = typeArrayHandle(THREAD, r); | |
4286 values_h->int_at_put(0, java_lang_Thread::RUNNABLE); | |
4287 break; | |
4288 } | |
4289 case JAVA_THREAD_STATE_BLOCKED : { | |
4290 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4291 values_h = typeArrayHandle(THREAD, r); | |
4292 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); | |
4293 break; | |
4294 } | |
4295 case JAVA_THREAD_STATE_WAITING : { | |
4296 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL); | |
4297 values_h = typeArrayHandle(THREAD, r); | |
4298 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT); | |
4299 values_h->int_at_put(1, java_lang_Thread::PARKED); | |
4300 break; | |
4301 } | |
4302 case JAVA_THREAD_STATE_TIMED_WAITING : { | |
4303 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL); | |
4304 values_h = typeArrayHandle(THREAD, r); | |
4305 values_h->int_at_put(0, java_lang_Thread::SLEEPING); | |
4306 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED); | |
4307 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED); | |
4308 break; | |
4309 } | |
4310 case JAVA_THREAD_STATE_TERMINATED : { | |
4311 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4312 values_h = typeArrayHandle(THREAD, r); | |
4313 values_h->int_at_put(0, java_lang_Thread::TERMINATED); | |
4314 break; | |
4315 } | |
4316 default: | |
4317 // Unknown state - probably incompatible JDK version | |
4318 return NULL; | |
4319 } | |
4320 | |
4321 return (jintArray) JNIHandles::make_local(env, values_h()); | |
4322 } | |
4323 JVM_END | |
4324 | |
4325 | |
4326 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env, | |
4327 jint javaThreadState, | |
4328 jintArray values)) | |
4329 { | |
4330 // If new thread states are added in future JDK and VM versions, | |
4331 // this should check if the JDK version is compatible with thread | |
4332 // states supported by the VM. Return NULL if not compatible. | |
4333 // | |
4334 // This function must map the VM java_lang_Thread::ThreadStatus | |
4335 // to the Java thread state that the JDK supports. | |
4336 // | |
4337 | |
4338 ResourceMark rm; | |
4339 | |
4340 // Check if threads is null | |
4341 if (values == NULL) { | |
4342 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
4343 } | |
4344 | |
4345 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values)); | |
4346 typeArrayHandle values_h(THREAD, v); | |
4347 | |
4348 objArrayHandle names_h; | |
4349 switch (javaThreadState) { | |
4350 case JAVA_THREAD_STATE_NEW : { | |
4351 assert(values_h->length() == 1 && | |
4352 values_h->int_at(0) == java_lang_Thread::NEW, | |
4353 "Invalid threadStatus value"); | |
4354 | |
1142 | 4355 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4356 1, /* only 1 substate */ |
4357 CHECK_NULL); | |
4358 names_h = objArrayHandle(THREAD, r); | |
4359 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL); | |
4360 names_h->obj_at_put(0, name()); | |
4361 break; | |
4362 } | |
4363 case JAVA_THREAD_STATE_RUNNABLE : { | |
4364 assert(values_h->length() == 1 && | |
4365 values_h->int_at(0) == java_lang_Thread::RUNNABLE, | |
4366 "Invalid threadStatus value"); | |
4367 | |
1142 | 4368 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4369 1, /* only 1 substate */ |
4370 CHECK_NULL); | |
4371 names_h = objArrayHandle(THREAD, r); | |
4372 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL); | |
4373 names_h->obj_at_put(0, name()); | |
4374 break; | |
4375 } | |
4376 case JAVA_THREAD_STATE_BLOCKED : { | |
4377 assert(values_h->length() == 1 && | |
4378 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER, | |
4379 "Invalid threadStatus value"); | |
4380 | |
1142 | 4381 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4382 1, /* only 1 substate */ |
4383 CHECK_NULL); | |
4384 names_h = objArrayHandle(THREAD, r); | |
4385 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL); | |
4386 names_h->obj_at_put(0, name()); | |
4387 break; | |
4388 } | |
4389 case JAVA_THREAD_STATE_WAITING : { | |
4390 assert(values_h->length() == 2 && | |
4391 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT && | |
4392 values_h->int_at(1) == java_lang_Thread::PARKED, | |
4393 "Invalid threadStatus value"); | |
1142 | 4394 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4395 2, /* number of substates */ |
4396 CHECK_NULL); | |
4397 names_h = objArrayHandle(THREAD, r); | |
4398 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT", | |
4399 CHECK_NULL); | |
4400 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED", | |
4401 CHECK_NULL); | |
4402 names_h->obj_at_put(0, name0()); | |
4403 names_h->obj_at_put(1, name1()); | |
4404 break; | |
4405 } | |
4406 case JAVA_THREAD_STATE_TIMED_WAITING : { | |
4407 assert(values_h->length() == 3 && | |
4408 values_h->int_at(0) == java_lang_Thread::SLEEPING && | |
4409 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED && | |
4410 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED, | |
4411 "Invalid threadStatus value"); | |
1142 | 4412 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4413 3, /* number of substates */ |
4414 CHECK_NULL); | |
4415 names_h = objArrayHandle(THREAD, r); | |
4416 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING", | |
4417 CHECK_NULL); | |
4418 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT", | |
4419 CHECK_NULL); | |
4420 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED", | |
4421 CHECK_NULL); | |
4422 names_h->obj_at_put(0, name0()); | |
4423 names_h->obj_at_put(1, name1()); | |
4424 names_h->obj_at_put(2, name2()); | |
4425 break; | |
4426 } | |
4427 case JAVA_THREAD_STATE_TERMINATED : { | |
4428 assert(values_h->length() == 1 && | |
4429 values_h->int_at(0) == java_lang_Thread::TERMINATED, | |
4430 "Invalid threadStatus value"); | |
1142 | 4431 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4432 1, /* only 1 substate */ |
4433 CHECK_NULL); | |
4434 names_h = objArrayHandle(THREAD, r); | |
4435 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL); | |
4436 names_h->obj_at_put(0, name()); | |
4437 break; | |
4438 } | |
4439 default: | |
4440 // Unknown state - probably incompatible JDK version | |
4441 return NULL; | |
4442 } | |
4443 return (jobjectArray) JNIHandles::make_local(env, names_h()); | |
4444 } | |
4445 JVM_END | |
4446 | |
4447 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size)) | |
4448 { | |
4449 memset(info, 0, sizeof(info_size)); | |
4450 | |
4451 info->jvm_version = Abstract_VM_Version::jvm_version(); | |
4452 info->update_version = 0; /* 0 in HotSpot Express VM */ | |
4453 info->special_update_version = 0; /* 0 in HotSpot Express VM */ | |
4454 | |
4455 // when we add a new capability in the jvm_version_info struct, we should also | |
4456 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat | |
4457 // counter defined in runtimeService.cpp. | |
4458 info->is_attachable = AttachListener::is_attach_supported(); | |
4459 } | |
4460 JVM_END |