Mercurial > hg > truffle
annotate src/share/vm/prims/jvm.cpp @ 6199:3f1ab0c19c30
7179383: MaxDirectMemorySize argument parsing is broken for values >2G
Summary: change hotspot flag to be unsigned
Reviewed-by: dholmes, sla, fparain, brutisso
Contributed-by: Chris Dennis <cdennis@terracottatech.com>
author | dholmes |
---|---|
date | Tue, 03 Jul 2012 01:41:29 -0400 |
parents | f7c4174b33ba |
children | e74da3c2b827 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/classLoader.hpp" | |
27 #include "classfile/javaAssertions.hpp" | |
28 #include "classfile/javaClasses.hpp" | |
29 #include "classfile/symbolTable.hpp" | |
30 #include "classfile/systemDictionary.hpp" | |
31 #include "classfile/vmSymbols.hpp" | |
32 #include "gc_interface/collectedHeap.inline.hpp" | |
33 #include "memory/oopFactory.hpp" | |
34 #include "memory/universe.inline.hpp" | |
3938 | 35 #include "oops/fieldStreams.hpp" |
1972 | 36 #include "oops/instanceKlass.hpp" |
37 #include "oops/objArrayKlass.hpp" | |
38 #include "prims/jvm.h" | |
39 #include "prims/jvm_misc.hpp" | |
40 #include "prims/jvmtiExport.hpp" | |
41 #include "prims/jvmtiThreadState.hpp" | |
42 #include "prims/nativeLookup.hpp" | |
43 #include "prims/privilegedStack.hpp" | |
44 #include "runtime/arguments.hpp" | |
45 #include "runtime/dtraceJSDT.hpp" | |
46 #include "runtime/handles.inline.hpp" | |
47 #include "runtime/init.hpp" | |
48 #include "runtime/interfaceSupport.hpp" | |
49 #include "runtime/java.hpp" | |
50 #include "runtime/javaCalls.hpp" | |
51 #include "runtime/jfieldIDWorkaround.hpp" | |
52 #include "runtime/os.hpp" | |
53 #include "runtime/perfData.hpp" | |
54 #include "runtime/reflection.hpp" | |
55 #include "runtime/vframe.hpp" | |
56 #include "runtime/vm_operations.hpp" | |
57 #include "services/attachListener.hpp" | |
58 #include "services/management.hpp" | |
59 #include "services/threadService.hpp" | |
60 #include "utilities/copy.hpp" | |
61 #include "utilities/defaultStream.hpp" | |
62 #include "utilities/dtrace.hpp" | |
63 #include "utilities/events.hpp" | |
64 #include "utilities/histogram.hpp" | |
65 #include "utilities/top.hpp" | |
66 #include "utilities/utf8.hpp" | |
67 #ifdef TARGET_OS_FAMILY_linux | |
68 # include "jvm_linux.h" | |
69 #endif | |
70 #ifdef TARGET_OS_FAMILY_solaris | |
71 # include "jvm_solaris.h" | |
72 #endif | |
73 #ifdef TARGET_OS_FAMILY_windows | |
74 # include "jvm_windows.h" | |
75 #endif | |
3960 | 76 #ifdef TARGET_OS_FAMILY_bsd |
77 # include "jvm_bsd.h" | |
78 #endif | |
1972 | 79 |
0 | 80 #include <errno.h> |
81 | |
4006 | 82 #ifndef USDT2 |
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83 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long); |
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84 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int); |
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85 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield); |
4006 | 86 #endif /* !USDT2 */ |
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87 |
0 | 88 /* |
89 NOTE about use of any ctor or function call that can trigger a safepoint/GC: | |
90 such ctors and calls MUST NOT come between an oop declaration/init and its | |
91 usage because if objects are move this may cause various memory stomps, bus | |
92 errors and segfaults. Here is a cookbook for causing so called "naked oop | |
93 failures": | |
94 | |
95 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> { | |
96 JVMWrapper("JVM_GetClassDeclaredFields"); | |
97 | |
98 // Object address to be held directly in mirror & not visible to GC | |
99 oop mirror = JNIHandles::resolve_non_null(ofClass); | |
100 | |
101 // If this ctor can hit a safepoint, moving objects around, then | |
102 ComplexConstructor foo; | |
103 | |
104 // Boom! mirror may point to JUNK instead of the intended object | |
105 (some dereference of mirror) | |
106 | |
107 // Here's another call that may block for GC, making mirror stale | |
108 MutexLocker ml(some_lock); | |
109 | |
110 // And here's an initializer that can result in a stale oop | |
111 // all in one step. | |
112 oop o = call_that_can_throw_exception(TRAPS); | |
113 | |
114 | |
115 The solution is to keep the oop declaration BELOW the ctor or function | |
116 call that might cause a GC, do another resolve to reassign the oop, or | |
117 consider use of a Handle instead of an oop so there is immunity from object | |
118 motion. But note that the "QUICK" entries below do not have a handlemark | |
119 and thus can only support use of handles passed in. | |
120 */ | |
121 | |
122 static void trace_class_resolution_impl(klassOop to_class, TRAPS) { | |
123 ResourceMark rm; | |
124 int line_number = -1; | |
125 const char * source_file = NULL; | |
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126 const char * trace = "explicit"; |
0 | 127 klassOop caller = NULL; |
128 JavaThread* jthread = JavaThread::current(); | |
129 if (jthread->has_last_Java_frame()) { | |
130 vframeStream vfst(jthread); | |
131 | |
132 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames | |
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133 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK); |
0 | 134 klassOop access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK); |
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135 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK); |
0 | 136 klassOop privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK); |
137 | |
138 methodOop last_caller = NULL; | |
139 | |
140 while (!vfst.at_end()) { | |
141 methodOop m = vfst.method(); | |
1142 | 142 if (!vfst.method()->method_holder()->klass_part()->is_subclass_of(SystemDictionary::ClassLoader_klass())&& |
0 | 143 !vfst.method()->method_holder()->klass_part()->is_subclass_of(access_controller_klass) && |
144 !vfst.method()->method_holder()->klass_part()->is_subclass_of(privileged_action_klass)) { | |
145 break; | |
146 } | |
147 last_caller = m; | |
148 vfst.next(); | |
149 } | |
150 // if this is called from Class.forName0 and that is called from Class.forName, | |
151 // then print the caller of Class.forName. If this is Class.loadClass, then print | |
152 // that caller, otherwise keep quiet since this should be picked up elsewhere. | |
153 bool found_it = false; | |
154 if (!vfst.at_end() && | |
155 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() && | |
156 vfst.method()->name() == vmSymbols::forName0_name()) { | |
157 vfst.next(); | |
158 if (!vfst.at_end() && | |
159 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() && | |
160 vfst.method()->name() == vmSymbols::forName_name()) { | |
161 vfst.next(); | |
162 found_it = true; | |
163 } | |
164 } else if (last_caller != NULL && | |
165 instanceKlass::cast(last_caller->method_holder())->name() == | |
166 vmSymbols::java_lang_ClassLoader() && | |
167 (last_caller->name() == vmSymbols::loadClassInternal_name() || | |
168 last_caller->name() == vmSymbols::loadClass_name())) { | |
169 found_it = true; | |
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170 } else if (!vfst.at_end()) { |
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171 if (vfst.method()->is_native()) { |
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172 // JNI call |
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173 found_it = true; |
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174 } |
0 | 175 } |
176 if (found_it && !vfst.at_end()) { | |
177 // found the caller | |
178 caller = vfst.method()->method_holder(); | |
179 line_number = vfst.method()->line_number_from_bci(vfst.bci()); | |
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180 if (line_number == -1) { |
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181 // show method name if it's a native method |
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182 trace = vfst.method()->name_and_sig_as_C_string(); |
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183 } |
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184 Symbol* s = instanceKlass::cast(caller)->source_file_name(); |
0 | 185 if (s != NULL) { |
186 source_file = s->as_C_string(); | |
187 } | |
188 } | |
189 } | |
190 if (caller != NULL) { | |
191 if (to_class != caller) { | |
192 const char * from = Klass::cast(caller)->external_name(); | |
193 const char * to = Klass::cast(to_class)->external_name(); | |
194 // print in a single call to reduce interleaving between threads | |
195 if (source_file != NULL) { | |
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196 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace); |
0 | 197 } else { |
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198 tty->print("RESOLVE %s %s (%s)\n", from, to, trace); |
0 | 199 } |
200 } | |
201 } | |
202 } | |
203 | |
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204 void trace_class_resolution(klassOop to_class) { |
0 | 205 EXCEPTION_MARK; |
206 trace_class_resolution_impl(to_class, THREAD); | |
207 if (HAS_PENDING_EXCEPTION) { | |
208 CLEAR_PENDING_EXCEPTION; | |
209 } | |
210 } | |
211 | |
212 // Wrapper to trace JVM functions | |
213 | |
214 #ifdef ASSERT | |
215 class JVMTraceWrapper : public StackObj { | |
216 public: | |
217 JVMTraceWrapper(const char* format, ...) { | |
218 if (TraceJVMCalls) { | |
219 va_list ap; | |
220 va_start(ap, format); | |
221 tty->print("JVM "); | |
222 tty->vprint_cr(format, ap); | |
223 va_end(ap); | |
224 } | |
225 } | |
226 }; | |
227 | |
228 Histogram* JVMHistogram; | |
229 volatile jint JVMHistogram_lock = 0; | |
230 | |
231 class JVMHistogramElement : public HistogramElement { | |
232 public: | |
233 JVMHistogramElement(const char* name); | |
234 }; | |
235 | |
236 JVMHistogramElement::JVMHistogramElement(const char* elementName) { | |
237 _name = elementName; | |
238 uintx count = 0; | |
239 | |
240 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) { | |
241 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) { | |
242 count +=1; | |
243 if ( (WarnOnStalledSpinLock > 0) | |
244 && (count % WarnOnStalledSpinLock == 0)) { | |
245 warning("JVMHistogram_lock seems to be stalled"); | |
246 } | |
247 } | |
248 } | |
249 | |
250 if(JVMHistogram == NULL) | |
251 JVMHistogram = new Histogram("JVM Call Counts",100); | |
252 | |
253 JVMHistogram->add_element(this); | |
254 Atomic::dec(&JVMHistogram_lock); | |
255 } | |
256 | |
257 #define JVMCountWrapper(arg) \ | |
258 static JVMHistogramElement* e = new JVMHistogramElement(arg); \ | |
259 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen! | |
260 | |
261 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1) | |
262 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2) | |
263 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3) | |
264 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4) | |
265 #else | |
266 #define JVMWrapper(arg1) | |
267 #define JVMWrapper2(arg1, arg2) | |
268 #define JVMWrapper3(arg1, arg2, arg3) | |
269 #define JVMWrapper4(arg1, arg2, arg3, arg4) | |
270 #endif | |
271 | |
272 | |
273 // Interface version ///////////////////////////////////////////////////////////////////// | |
274 | |
275 | |
276 JVM_LEAF(jint, JVM_GetInterfaceVersion()) | |
277 return JVM_INTERFACE_VERSION; | |
278 JVM_END | |
279 | |
280 | |
281 // java.lang.System ////////////////////////////////////////////////////////////////////// | |
282 | |
283 | |
284 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored)) | |
285 JVMWrapper("JVM_CurrentTimeMillis"); | |
286 return os::javaTimeMillis(); | |
287 JVM_END | |
288 | |
289 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored)) | |
290 JVMWrapper("JVM_NanoTime"); | |
291 return os::javaTimeNanos(); | |
292 JVM_END | |
293 | |
294 | |
295 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos, | |
296 jobject dst, jint dst_pos, jint length)) | |
297 JVMWrapper("JVM_ArrayCopy"); | |
298 // Check if we have null pointers | |
299 if (src == NULL || dst == NULL) { | |
300 THROW(vmSymbols::java_lang_NullPointerException()); | |
301 } | |
302 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src)); | |
303 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst)); | |
304 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop"); | |
305 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop"); | |
306 // Do copy | |
307 Klass::cast(s->klass())->copy_array(s, src_pos, d, dst_pos, length, thread); | |
308 JVM_END | |
309 | |
310 | |
311 static void set_property(Handle props, const char* key, const char* value, TRAPS) { | |
312 JavaValue r(T_OBJECT); | |
313 // public synchronized Object put(Object key, Object value); | |
314 HandleMark hm(THREAD); | |
315 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK); | |
316 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK); | |
317 JavaCalls::call_virtual(&r, | |
318 props, | |
1142 | 319 KlassHandle(THREAD, SystemDictionary::Properties_klass()), |
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320 vmSymbols::put_name(), |
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321 vmSymbols::object_object_object_signature(), |
0 | 322 key_str, |
323 value_str, | |
324 THREAD); | |
325 } | |
326 | |
327 | |
328 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties)); | |
329 | |
330 | |
331 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties)) | |
332 JVMWrapper("JVM_InitProperties"); | |
333 ResourceMark rm; | |
334 | |
335 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); | |
336 | |
337 // System property list includes both user set via -D option and | |
338 // jvm system specific properties. | |
339 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { | |
340 PUTPROP(props, p->key(), p->value()); | |
341 } | |
342 | |
343 // Convert the -XX:MaxDirectMemorySize= command line flag | |
344 // to the sun.nio.MaxDirectMemorySize property. | |
345 // Do this after setting user properties to prevent people | |
346 // from setting the value with a -D option, as requested. | |
347 { | |
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348 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) { |
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349 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1"); |
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350 } else { |
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351 char as_chars[256]; |
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352 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize); |
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353 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars); |
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354 } |
0 | 355 } |
356 | |
357 // JVM monitoring and management support | |
358 // Add the sun.management.compiler property for the compiler's name | |
359 { | |
360 #undef CSIZE | |
361 #if defined(_LP64) || defined(_WIN64) | |
362 #define CSIZE "64-Bit " | |
363 #else | |
364 #define CSIZE | |
365 #endif // 64bit | |
366 | |
367 #ifdef TIERED | |
368 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers"; | |
369 #else | |
370 #if defined(COMPILER1) | |
371 const char* compiler_name = "HotSpot " CSIZE "Client Compiler"; | |
372 #elif defined(COMPILER2) | |
373 const char* compiler_name = "HotSpot " CSIZE "Server Compiler"; | |
374 #else | |
375 const char* compiler_name = ""; | |
376 #endif // compilers | |
377 #endif // TIERED | |
378 | |
379 if (*compiler_name != '\0' && | |
380 (Arguments::mode() != Arguments::_int)) { | |
381 PUTPROP(props, "sun.management.compiler", compiler_name); | |
382 } | |
383 } | |
384 | |
385 return properties; | |
386 JVM_END | |
387 | |
388 | |
389 // java.lang.Runtime ///////////////////////////////////////////////////////////////////////// | |
390 | |
391 extern volatile jint vm_created; | |
392 | |
393 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code)) | |
394 if (vm_created != 0 && (code == 0)) { | |
395 // The VM is about to exit. We call back into Java to check whether finalizers should be run | |
396 Universe::run_finalizers_on_exit(); | |
397 } | |
398 before_exit(thread); | |
399 vm_exit(code); | |
400 JVM_END | |
401 | |
402 | |
403 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code)) | |
404 before_exit(thread); | |
405 vm_exit(code); | |
406 JVM_END | |
407 | |
408 | |
409 JVM_LEAF(void, JVM_OnExit(void (*func)(void))) | |
410 register_on_exit_function(func); | |
411 JVM_END | |
412 | |
413 | |
414 JVM_ENTRY_NO_ENV(void, JVM_GC(void)) | |
415 JVMWrapper("JVM_GC"); | |
416 if (!DisableExplicitGC) { | |
417 Universe::heap()->collect(GCCause::_java_lang_system_gc); | |
418 } | |
419 JVM_END | |
420 | |
421 | |
422 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void)) | |
423 JVMWrapper("JVM_MaxObjectInspectionAge"); | |
424 return Universe::heap()->millis_since_last_gc(); | |
425 JVM_END | |
426 | |
427 | |
428 JVM_LEAF(void, JVM_TraceInstructions(jboolean on)) | |
429 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported"); | |
430 JVM_END | |
431 | |
432 | |
433 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on)) | |
434 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported"); | |
435 JVM_END | |
436 | |
437 static inline jlong convert_size_t_to_jlong(size_t val) { | |
438 // In the 64-bit vm, a size_t can overflow a jlong (which is signed). | |
439 NOT_LP64 (return (jlong)val;) | |
440 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);) | |
441 } | |
442 | |
443 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void)) | |
444 JVMWrapper("JVM_TotalMemory"); | |
445 size_t n = Universe::heap()->capacity(); | |
446 return convert_size_t_to_jlong(n); | |
447 JVM_END | |
448 | |
449 | |
450 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void)) | |
451 JVMWrapper("JVM_FreeMemory"); | |
452 CollectedHeap* ch = Universe::heap(); | |
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453 size_t n; |
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454 { |
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455 MutexLocker x(Heap_lock); |
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456 n = ch->capacity() - ch->used(); |
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457 } |
0 | 458 return convert_size_t_to_jlong(n); |
459 JVM_END | |
460 | |
461 | |
462 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void)) | |
463 JVMWrapper("JVM_MaxMemory"); | |
464 size_t n = Universe::heap()->max_capacity(); | |
465 return convert_size_t_to_jlong(n); | |
466 JVM_END | |
467 | |
468 | |
469 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void)) | |
470 JVMWrapper("JVM_ActiveProcessorCount"); | |
471 return os::active_processor_count(); | |
472 JVM_END | |
473 | |
474 | |
475 | |
476 // java.lang.Throwable ////////////////////////////////////////////////////// | |
477 | |
478 | |
479 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver)) | |
480 JVMWrapper("JVM_FillInStackTrace"); | |
481 Handle exception(thread, JNIHandles::resolve_non_null(receiver)); | |
482 java_lang_Throwable::fill_in_stack_trace(exception); | |
483 JVM_END | |
484 | |
485 | |
486 JVM_ENTRY(void, JVM_PrintStackTrace(JNIEnv *env, jobject receiver, jobject printable)) | |
487 JVMWrapper("JVM_PrintStackTrace"); | |
488 // Note: This is no longer used in Merlin, but we still support it for compatibility. | |
489 oop exception = JNIHandles::resolve_non_null(receiver); | |
490 oop stream = JNIHandles::resolve_non_null(printable); | |
491 java_lang_Throwable::print_stack_trace(exception, stream); | |
492 JVM_END | |
493 | |
494 | |
495 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable)) | |
496 JVMWrapper("JVM_GetStackTraceDepth"); | |
497 oop exception = JNIHandles::resolve(throwable); | |
498 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD); | |
499 JVM_END | |
500 | |
501 | |
502 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index)) | |
503 JVMWrapper("JVM_GetStackTraceElement"); | |
504 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC | |
505 oop exception = JNIHandles::resolve(throwable); | |
506 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL); | |
507 return JNIHandles::make_local(env, element); | |
508 JVM_END | |
509 | |
510 | |
511 // java.lang.Object /////////////////////////////////////////////// | |
512 | |
513 | |
514 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle)) | |
515 JVMWrapper("JVM_IHashCode"); | |
516 // as implemented in the classic virtual machine; return 0 if object is NULL | |
517 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ; | |
518 JVM_END | |
519 | |
520 | |
521 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms)) | |
522 JVMWrapper("JVM_MonitorWait"); | |
523 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
524 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorWait must apply to an object"); | |
525 JavaThreadInObjectWaitState jtiows(thread, ms != 0); | |
526 if (JvmtiExport::should_post_monitor_wait()) { | |
527 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms); | |
528 } | |
529 ObjectSynchronizer::wait(obj, ms, CHECK); | |
530 JVM_END | |
531 | |
532 | |
533 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle)) | |
534 JVMWrapper("JVM_MonitorNotify"); | |
535 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
536 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotify must apply to an object"); | |
537 ObjectSynchronizer::notify(obj, CHECK); | |
538 JVM_END | |
539 | |
540 | |
541 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle)) | |
542 JVMWrapper("JVM_MonitorNotifyAll"); | |
543 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
544 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotifyAll must apply to an object"); | |
545 ObjectSynchronizer::notifyall(obj, CHECK); | |
546 JVM_END | |
547 | |
548 | |
549 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle)) | |
550 JVMWrapper("JVM_Clone"); | |
551 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
552 const KlassHandle klass (THREAD, obj->klass()); | |
553 JvmtiVMObjectAllocEventCollector oam; | |
554 | |
555 #ifdef ASSERT | |
556 // Just checking that the cloneable flag is set correct | |
557 if (obj->is_javaArray()) { | |
558 guarantee(klass->is_cloneable(), "all arrays are cloneable"); | |
559 } else { | |
560 guarantee(obj->is_instance(), "should be instanceOop"); | |
1142 | 561 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass()); |
0 | 562 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag"); |
563 } | |
564 #endif | |
565 | |
566 // Check if class of obj supports the Cloneable interface. | |
567 // All arrays are considered to be cloneable (See JLS 20.1.5) | |
568 if (!klass->is_cloneable()) { | |
569 ResourceMark rm(THREAD); | |
570 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name()); | |
571 } | |
572 | |
573 // Make shallow object copy | |
574 const int size = obj->size(); | |
575 oop new_obj = NULL; | |
576 if (obj->is_javaArray()) { | |
577 const int length = ((arrayOop)obj())->length(); | |
578 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL); | |
579 } else { | |
580 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL); | |
581 } | |
582 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread | |
583 // is modifying a reference field in the clonee, a non-oop-atomic copy might | |
584 // be suspended in the middle of copying the pointer and end up with parts | |
585 // of two different pointers in the field. Subsequent dereferences will crash. | |
586 // 4846409: an oop-copy of objects with long or double fields or arrays of same | |
587 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead | |
588 // of oops. We know objects are aligned on a minimum of an jlong boundary. | |
589 // The same is true of StubRoutines::object_copy and the various oop_copy | |
590 // variants, and of the code generated by the inline_native_clone intrinsic. | |
591 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned"); | |
592 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj, | |
593 (size_t)align_object_size(size) / HeapWordsPerLong); | |
594 // Clear the header | |
595 new_obj->init_mark(); | |
596 | |
597 // Store check (mark entire object and let gc sort it out) | |
598 BarrierSet* bs = Universe::heap()->barrier_set(); | |
599 assert(bs->has_write_region_opt(), "Barrier set does not have write_region"); | |
600 bs->write_region(MemRegion((HeapWord*)new_obj, size)); | |
601 | |
602 // Caution: this involves a java upcall, so the clone should be | |
603 // "gc-robust" by this stage. | |
604 if (klass->has_finalizer()) { | |
605 assert(obj->is_instance(), "should be instanceOop"); | |
606 new_obj = instanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL); | |
607 } | |
608 | |
609 return JNIHandles::make_local(env, oop(new_obj)); | |
610 JVM_END | |
611 | |
612 // java.lang.Compiler //////////////////////////////////////////////////// | |
613 | |
614 // The initial cuts of the HotSpot VM will not support JITs, and all existing | |
615 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM | |
616 // functions are all silently ignored unless JVM warnings are printed. | |
617 | |
618 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls)) | |
619 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported"); | |
620 JVM_END | |
621 | |
622 | |
623 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls)) | |
624 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported"); | |
625 return JNI_FALSE; | |
626 JVM_END | |
627 | |
628 | |
629 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls)) | |
630 if (PrintJVMWarnings) warning("JVM_CompileClass not supported"); | |
631 return JNI_FALSE; | |
632 JVM_END | |
633 | |
634 | |
635 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname)) | |
636 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported"); | |
637 return JNI_FALSE; | |
638 JVM_END | |
639 | |
640 | |
641 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg)) | |
642 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported"); | |
643 return NULL; | |
644 JVM_END | |
645 | |
646 | |
647 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls)) | |
648 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported"); | |
649 JVM_END | |
650 | |
651 | |
652 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls)) | |
653 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported"); | |
654 JVM_END | |
655 | |
656 | |
657 | |
658 // Error message support ////////////////////////////////////////////////////// | |
659 | |
660 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len)) | |
661 JVMWrapper("JVM_GetLastErrorString"); | |
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662 return (jint)os::lasterror(buf, len); |
0 | 663 JVM_END |
664 | |
665 | |
666 // java.io.File /////////////////////////////////////////////////////////////// | |
667 | |
668 JVM_LEAF(char*, JVM_NativePath(char* path)) | |
669 JVMWrapper2("JVM_NativePath (%s)", path); | |
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670 return os::native_path(path); |
0 | 671 JVM_END |
672 | |
673 | |
674 // Misc. class handling /////////////////////////////////////////////////////////// | |
675 | |
676 | |
677 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth)) | |
678 JVMWrapper("JVM_GetCallerClass"); | |
679 klassOop k = thread->security_get_caller_class(depth); | |
680 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); | |
681 JVM_END | |
682 | |
683 | |
684 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf)) | |
685 JVMWrapper("JVM_FindPrimitiveClass"); | |
686 oop mirror = NULL; | |
687 BasicType t = name2type(utf); | |
688 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) { | |
689 mirror = Universe::java_mirror(t); | |
690 } | |
691 if (mirror == NULL) { | |
692 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf); | |
693 } else { | |
694 return (jclass) JNIHandles::make_local(env, mirror); | |
695 } | |
696 JVM_END | |
697 | |
698 | |
699 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls)) | |
700 JVMWrapper("JVM_ResolveClass"); | |
701 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented"); | |
702 JVM_END | |
703 | |
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704 |
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705 // Returns a class loaded by the bootstrap class loader; or null |
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706 // if not found. ClassNotFoundException is not thrown. |
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707 // |
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708 // Rationale behind JVM_FindClassFromBootLoader |
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709 // a> JVM_FindClassFromClassLoader was never exported in the export tables. |
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710 // b> because of (a) java.dll has a direct dependecy on the unexported |
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711 // private symbol "_JVM_FindClassFromClassLoader@20". |
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712 // c> the launcher cannot use the private symbol as it dynamically opens |
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713 // the entry point, so if something changes, the launcher will fail |
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714 // unexpectedly at runtime, it is safest for the launcher to dlopen a |
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715 // stable exported interface. |
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716 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its |
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717 // signature to change from _JVM_FindClassFromClassLoader@20 to |
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718 // JVM_FindClassFromClassLoader and will not be backward compatible |
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719 // with older JDKs. |
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720 // Thus a public/stable exported entry point is the right solution, |
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721 // public here means public in linker semantics, and is exported only |
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722 // to the JDK, and is not intended to be a public API. |
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723 |
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724 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env, |
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725 const char* name)) |
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726 JVMWrapper2("JVM_FindClassFromBootLoader %s", name); |
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727 |
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728 // Java libraries should ensure that name is never null... |
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729 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { |
878
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730 // It's impossible to create this class; the name cannot fit |
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731 // into the constant pool. |
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732 return NULL; |
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733 } |
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734 |
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735 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); |
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736 klassOop k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL); |
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737 if (k == NULL) { |
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738 return NULL; |
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739 } |
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740 |
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741 if (TraceClassResolution) { |
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742 trace_class_resolution(k); |
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743 } |
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744 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); |
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745 JVM_END |
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746 |
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747 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name, |
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748 jboolean init, jobject loader, |
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749 jboolean throwError)) |
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750 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name, |
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751 throwError ? "error" : "exception"); |
388 | 752 // Java libraries should ensure that name is never null... |
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753 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { |
388 | 754 // It's impossible to create this class; the name cannot fit |
755 // into the constant pool. | |
756 if (throwError) { | |
757 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
758 } else { | |
759 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name); | |
760 } | |
761 } | |
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762 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); |
388 | 763 Handle h_loader(THREAD, JNIHandles::resolve(loader)); |
764 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, | |
765 Handle(), throwError, THREAD); | |
766 | |
767 if (TraceClassResolution && result != NULL) { | |
768 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); | |
769 } | |
770 return result; | |
0 | 771 JVM_END |
772 | |
773 | |
774 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name, | |
775 jboolean init, jclass from)) | |
776 JVMWrapper2("JVM_FindClassFromClass %s", name); | |
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777 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { |
0 | 778 // It's impossible to create this class; the name cannot fit |
779 // into the constant pool. | |
780 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
781 } | |
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782 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); |
0 | 783 oop from_class_oop = JNIHandles::resolve(from); |
784 klassOop from_class = (from_class_oop == NULL) | |
785 ? (klassOop)NULL | |
786 : java_lang_Class::as_klassOop(from_class_oop); | |
787 oop class_loader = NULL; | |
788 oop protection_domain = NULL; | |
789 if (from_class != NULL) { | |
790 class_loader = Klass::cast(from_class)->class_loader(); | |
791 protection_domain = Klass::cast(from_class)->protection_domain(); | |
792 } | |
793 Handle h_loader(THREAD, class_loader); | |
794 Handle h_prot (THREAD, protection_domain); | |
795 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, | |
796 h_prot, true, thread); | |
797 | |
798 if (TraceClassResolution && result != NULL) { | |
799 // this function is generally only used for class loading during verification. | |
800 ResourceMark rm; | |
801 oop from_mirror = JNIHandles::resolve_non_null(from); | |
802 klassOop from_class = java_lang_Class::as_klassOop(from_mirror); | |
803 const char * from_name = Klass::cast(from_class)->external_name(); | |
804 | |
805 oop mirror = JNIHandles::resolve_non_null(result); | |
806 klassOop to_class = java_lang_Class::as_klassOop(mirror); | |
807 const char * to = Klass::cast(to_class)->external_name(); | |
808 tty->print("RESOLVE %s %s (verification)\n", from_name, to); | |
809 } | |
810 | |
811 return result; | |
812 JVM_END | |
813 | |
814 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) { | |
815 if (loader.is_null()) { | |
816 return; | |
817 } | |
818 | |
819 // check whether the current caller thread holds the lock or not. | |
820 // If not, increment the corresponding counter | |
821 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) != | |
822 ObjectSynchronizer::owner_self) { | |
823 counter->inc(); | |
824 } | |
825 } | |
826 | |
827 // common code for JVM_DefineClass() and JVM_DefineClassWithSource() | |
973
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828 // and JVM_DefineClassWithSourceCond() |
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829 static jclass jvm_define_class_common(JNIEnv *env, const char *name, |
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830 jobject loader, const jbyte *buf, |
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831 jsize len, jobject pd, const char *source, |
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832 jboolean verify, TRAPS) { |
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833 if (source == NULL) source = "__JVM_DefineClass__"; |
0 | 834 |
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835 assert(THREAD->is_Java_thread(), "must be a JavaThread"); |
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836 JavaThread* jt = (JavaThread*) THREAD; |
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837 |
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838 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(), |
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839 ClassLoader::perf_define_appclass_selftime(), |
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840 ClassLoader::perf_define_appclasses(), |
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841 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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842 jt->get_thread_stat()->perf_timers_addr(), |
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843 PerfClassTraceTime::DEFINE_CLASS); |
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844 |
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845 if (UsePerfData) { |
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846 ClassLoader::perf_app_classfile_bytes_read()->inc(len); |
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847 } |
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848 |
0 | 849 // Since exceptions can be thrown, class initialization can take place |
850 // if name is NULL no check for class name in .class stream has to be made. | |
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851 TempNewSymbol class_name = NULL; |
0 | 852 if (name != NULL) { |
853 const int str_len = (int)strlen(name); | |
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854 if (str_len > Symbol::max_length()) { |
0 | 855 // It's impossible to create this class; the name cannot fit |
856 // into the constant pool. | |
857 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
858 } | |
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859 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL); |
0 | 860 } |
861 | |
862 ResourceMark rm(THREAD); | |
863 ClassFileStream st((u1*) buf, len, (char *)source); | |
864 Handle class_loader (THREAD, JNIHandles::resolve(loader)); | |
865 if (UsePerfData) { | |
866 is_lock_held_by_thread(class_loader, | |
867 ClassLoader::sync_JVMDefineClassLockFreeCounter(), | |
868 THREAD); | |
869 } | |
870 Handle protection_domain (THREAD, JNIHandles::resolve(pd)); | |
871 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader, | |
872 protection_domain, &st, | |
973
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873 verify != 0, |
0 | 874 CHECK_NULL); |
875 | |
876 if (TraceClassResolution && k != NULL) { | |
877 trace_class_resolution(k); | |
878 } | |
879 | |
880 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); | |
881 } | |
882 | |
883 | |
884 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd)) | |
885 JVMWrapper2("JVM_DefineClass %s", name); | |
886 | |
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887 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD); |
0 | 888 JVM_END |
889 | |
890 | |
891 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source)) | |
892 JVMWrapper2("JVM_DefineClassWithSource %s", name); | |
893 | |
973
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894 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD); |
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895 JVM_END |
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896 |
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897 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name, |
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898 jobject loader, const jbyte *buf, |
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899 jsize len, jobject pd, |
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900 const char *source, jboolean verify)) |
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901 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name); |
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902 |
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903 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD); |
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904 JVM_END |
0 | 905 |
906 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name)) | |
907 JVMWrapper("JVM_FindLoadedClass"); | |
908 ResourceMark rm(THREAD); | |
909 | |
910 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); | |
911 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL); | |
912 | |
913 const char* str = java_lang_String::as_utf8_string(string()); | |
914 // Sanity check, don't expect null | |
915 if (str == NULL) return NULL; | |
916 | |
917 const int str_len = (int)strlen(str); | |
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918 if (str_len > Symbol::max_length()) { |
0 | 919 // It's impossible to create this class; the name cannot fit |
920 // into the constant pool. | |
921 return NULL; | |
922 } | |
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923 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL); |
0 | 924 |
925 // Security Note: | |
926 // The Java level wrapper will perform the necessary security check allowing | |
927 // us to pass the NULL as the initiating class loader. | |
928 Handle h_loader(THREAD, JNIHandles::resolve(loader)); | |
929 if (UsePerfData) { | |
930 is_lock_held_by_thread(h_loader, | |
931 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(), | |
932 THREAD); | |
933 } | |
934 | |
935 klassOop k = SystemDictionary::find_instance_or_array_klass(klass_name, | |
936 h_loader, | |
937 Handle(), | |
938 CHECK_NULL); | |
939 | |
940 return (k == NULL) ? NULL : | |
941 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); | |
942 JVM_END | |
943 | |
944 | |
945 // Reflection support ////////////////////////////////////////////////////////////////////////////// | |
946 | |
947 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls)) | |
948 assert (cls != NULL, "illegal class"); | |
949 JVMWrapper("JVM_GetClassName"); | |
950 JvmtiVMObjectAllocEventCollector oam; | |
951 ResourceMark rm(THREAD); | |
952 const char* name; | |
953 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
954 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls))); | |
955 } else { | |
956 // Consider caching interned string in Klass | |
957 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
958 assert(k->is_klass(), "just checking"); | |
959 name = Klass::cast(k)->external_name(); | |
960 } | |
961 oop result = StringTable::intern((char*) name, CHECK_NULL); | |
962 return (jstring) JNIHandles::make_local(env, result); | |
963 JVM_END | |
964 | |
965 | |
966 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls)) | |
967 JVMWrapper("JVM_GetClassInterfaces"); | |
968 JvmtiVMObjectAllocEventCollector oam; | |
969 oop mirror = JNIHandles::resolve_non_null(cls); | |
970 | |
971 // Special handling for primitive objects | |
972 if (java_lang_Class::is_primitive(mirror)) { | |
973 // Primitive objects does not have any interfaces | |
1142 | 974 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); |
0 | 975 return (jobjectArray) JNIHandles::make_local(env, r); |
976 } | |
977 | |
978 KlassHandle klass(thread, java_lang_Class::as_klassOop(mirror)); | |
979 // Figure size of result array | |
980 int size; | |
981 if (klass->oop_is_instance()) { | |
982 size = instanceKlass::cast(klass())->local_interfaces()->length(); | |
983 } else { | |
984 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass"); | |
985 size = 2; | |
986 } | |
987 | |
988 // Allocate result array | |
1142 | 989 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL); |
0 | 990 objArrayHandle result (THREAD, r); |
991 // Fill in result | |
992 if (klass->oop_is_instance()) { | |
993 // Regular instance klass, fill in all local interfaces | |
994 for (int index = 0; index < size; index++) { | |
995 klassOop k = klassOop(instanceKlass::cast(klass())->local_interfaces()->obj_at(index)); | |
996 result->obj_at_put(index, Klass::cast(k)->java_mirror()); | |
997 } | |
998 } else { | |
999 // All arrays implement java.lang.Cloneable and java.io.Serializable | |
1142 | 1000 result->obj_at_put(0, Klass::cast(SystemDictionary::Cloneable_klass())->java_mirror()); |
1001 result->obj_at_put(1, Klass::cast(SystemDictionary::Serializable_klass())->java_mirror()); | |
0 | 1002 } |
1003 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1004 JVM_END | |
1005 | |
1006 | |
1007 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls)) | |
1008 JVMWrapper("JVM_GetClassLoader"); | |
1009 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1010 return NULL; | |
1011 } | |
1012 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1013 oop loader = Klass::cast(k)->class_loader(); | |
1014 return JNIHandles::make_local(env, loader); | |
1015 JVM_END | |
1016 | |
1017 | |
1018 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls)) | |
1019 JVMWrapper("JVM_IsInterface"); | |
1020 oop mirror = JNIHandles::resolve_non_null(cls); | |
1021 if (java_lang_Class::is_primitive(mirror)) { | |
1022 return JNI_FALSE; | |
1023 } | |
1024 klassOop k = java_lang_Class::as_klassOop(mirror); | |
1025 jboolean result = Klass::cast(k)->is_interface(); | |
1026 assert(!result || Klass::cast(k)->oop_is_instance(), | |
1027 "all interfaces are instance types"); | |
1028 // The compiler intrinsic for isInterface tests the | |
1029 // Klass::_access_flags bits in the same way. | |
1030 return result; | |
1031 JVM_END | |
1032 | |
1033 | |
1034 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls)) | |
1035 JVMWrapper("JVM_GetClassSigners"); | |
1036 JvmtiVMObjectAllocEventCollector oam; | |
1037 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1038 // There are no signers for primitive types | |
1039 return NULL; | |
1040 } | |
1041 | |
1042 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1043 objArrayOop signers = NULL; | |
1044 if (Klass::cast(k)->oop_is_instance()) { | |
1045 signers = instanceKlass::cast(k)->signers(); | |
1046 } | |
1047 | |
1048 // If there are no signers set in the class, or if the class | |
1049 // is an array, return NULL. | |
1050 if (signers == NULL) return NULL; | |
1051 | |
1052 // copy of the signers array | |
1053 klassOop element = objArrayKlass::cast(signers->klass())->element_klass(); | |
1054 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL); | |
1055 for (int index = 0; index < signers->length(); index++) { | |
1056 signers_copy->obj_at_put(index, signers->obj_at(index)); | |
1057 } | |
1058 | |
1059 // return the copy | |
1060 return (jobjectArray) JNIHandles::make_local(env, signers_copy); | |
1061 JVM_END | |
1062 | |
1063 | |
1064 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers)) | |
1065 JVMWrapper("JVM_SetClassSigners"); | |
1066 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1067 // This call is ignored for primitive types and arrays. | |
1068 // Signers are only set once, ClassLoader.java, and thus shouldn't | |
1069 // be called with an array. Only the bootstrap loader creates arrays. | |
1070 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1071 if (Klass::cast(k)->oop_is_instance()) { | |
1072 instanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers))); | |
1073 } | |
1074 } | |
1075 JVM_END | |
1076 | |
1077 | |
1078 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls)) | |
1079 JVMWrapper("JVM_GetProtectionDomain"); | |
1080 if (JNIHandles::resolve(cls) == NULL) { | |
1081 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); | |
1082 } | |
1083 | |
1084 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
1085 // Primitive types does not have a protection domain. | |
1086 return NULL; | |
1087 } | |
1088 | |
1089 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
1090 return (jobject) JNIHandles::make_local(env, Klass::cast(k)->protection_domain()); | |
1091 JVM_END | |
1092 | |
1093 | |
1094 // Obsolete since 1.2 (Class.setProtectionDomain removed), although | |
1095 // still defined in core libraries as of 1.5. | |
1096 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain)) | |
1097 JVMWrapper("JVM_SetProtectionDomain"); | |
1098 if (JNIHandles::resolve(cls) == NULL) { | |
1099 THROW(vmSymbols::java_lang_NullPointerException()); | |
1100 } | |
1101 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
1102 // Call is ignored for primitive types | |
1103 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
1104 | |
1105 // cls won't be an array, as this called only from ClassLoader.defineClass | |
1106 if (Klass::cast(k)->oop_is_instance()) { | |
1107 oop pd = JNIHandles::resolve(protection_domain); | |
1108 assert(pd == NULL || pd->is_oop(), "just checking"); | |
1109 instanceKlass::cast(k)->set_protection_domain(pd); | |
1110 } | |
1111 } | |
1112 JVM_END | |
1113 | |
1114 | |
1115 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException)) | |
1116 JVMWrapper("JVM_DoPrivileged"); | |
1117 | |
1118 if (action == NULL) { | |
1119 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action"); | |
1120 } | |
1121 | |
1122 // Stack allocated list of privileged stack elements | |
1123 PrivilegedElement pi; | |
1124 | |
1125 // Check that action object understands "Object run()" | |
1126 Handle object (THREAD, JNIHandles::resolve(action)); | |
1127 | |
1128 // get run() method | |
1129 methodOop m_oop = Klass::cast(object->klass())->uncached_lookup_method( | |
1130 vmSymbols::run_method_name(), | |
1131 vmSymbols::void_object_signature()); | |
1132 methodHandle m (THREAD, m_oop); | |
1133 if (m.is_null() || !m->is_method() || !methodOop(m())->is_public() || methodOop(m())->is_static()) { | |
1134 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method"); | |
1135 } | |
1136 | |
1137 // Compute the frame initiating the do privileged operation and setup the privileged stack | |
1138 vframeStream vfst(thread); | |
1139 vfst.security_get_caller_frame(1); | |
1140 | |
1141 if (!vfst.at_end()) { | |
1142 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL); | |
1143 thread->set_privileged_stack_top(&pi); | |
1144 } | |
1145 | |
1146 | |
1147 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type | |
1148 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction | |
1149 Handle pending_exception; | |
1150 JavaValue result(T_OBJECT); | |
1151 JavaCallArguments args(object); | |
1152 JavaCalls::call(&result, m, &args, THREAD); | |
1153 | |
1154 // done with action, remove ourselves from the list | |
1155 if (!vfst.at_end()) { | |
1156 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element"); | |
1157 thread->set_privileged_stack_top(thread->privileged_stack_top()->next()); | |
1158 } | |
1159 | |
1160 if (HAS_PENDING_EXCEPTION) { | |
1161 pending_exception = Handle(THREAD, PENDING_EXCEPTION); | |
1162 CLEAR_PENDING_EXCEPTION; | |
1163 | |
1142 | 1164 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) && |
1165 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) { | |
0 | 1166 // Throw a java.security.PrivilegedActionException(Exception e) exception |
1167 JavaCallArguments args(pending_exception); | |
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1168 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(), |
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1169 vmSymbols::exception_void_signature(), |
0 | 1170 &args); |
1171 } | |
1172 } | |
1173 | |
1174 if (pending_exception.not_null()) THROW_OOP_0(pending_exception()); | |
1175 return JNIHandles::make_local(env, (oop) result.get_jobject()); | |
1176 JVM_END | |
1177 | |
1178 | |
1179 // Returns the inherited_access_control_context field of the running thread. | |
1180 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls)) | |
1181 JVMWrapper("JVM_GetInheritedAccessControlContext"); | |
1182 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj()); | |
1183 return JNIHandles::make_local(env, result); | |
1184 JVM_END | |
1185 | |
1186 class RegisterArrayForGC { | |
1187 private: | |
1188 JavaThread *_thread; | |
1189 public: | |
1190 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) { | |
1191 _thread = thread; | |
1192 _thread->register_array_for_gc(array); | |
1193 } | |
1194 | |
1195 ~RegisterArrayForGC() { | |
1196 _thread->register_array_for_gc(NULL); | |
1197 } | |
1198 }; | |
1199 | |
1200 | |
1201 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls)) | |
1202 JVMWrapper("JVM_GetStackAccessControlContext"); | |
1203 if (!UsePrivilegedStack) return NULL; | |
1204 | |
1205 ResourceMark rm(THREAD); | |
1206 GrowableArray<oop>* local_array = new GrowableArray<oop>(12); | |
1207 JvmtiVMObjectAllocEventCollector oam; | |
1208 | |
1209 // count the protection domains on the execution stack. We collapse | |
1210 // duplicate consecutive protection domains into a single one, as | |
1211 // well as stopping when we hit a privileged frame. | |
1212 | |
1213 // Use vframeStream to iterate through Java frames | |
1214 vframeStream vfst(thread); | |
1215 | |
1216 oop previous_protection_domain = NULL; | |
1217 Handle privileged_context(thread, NULL); | |
1218 bool is_privileged = false; | |
1219 oop protection_domain = NULL; | |
1220 | |
1221 for(; !vfst.at_end(); vfst.next()) { | |
1222 // get method of frame | |
1223 methodOop method = vfst.method(); | |
1224 intptr_t* frame_id = vfst.frame_id(); | |
1225 | |
1226 // check the privileged frames to see if we have a match | |
1227 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) { | |
1228 // this frame is privileged | |
1229 is_privileged = true; | |
1230 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context()); | |
1231 protection_domain = thread->privileged_stack_top()->protection_domain(); | |
1232 } else { | |
1233 protection_domain = instanceKlass::cast(method->method_holder())->protection_domain(); | |
1234 } | |
1235 | |
1236 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) { | |
1237 local_array->push(protection_domain); | |
1238 previous_protection_domain = protection_domain; | |
1239 } | |
1240 | |
1241 if (is_privileged) break; | |
1242 } | |
1243 | |
1244 | |
1245 // either all the domains on the stack were system domains, or | |
1246 // we had a privileged system domain | |
1247 if (local_array->is_empty()) { | |
1248 if (is_privileged && privileged_context.is_null()) return NULL; | |
1249 | |
1250 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL); | |
1251 return JNIHandles::make_local(env, result); | |
1252 } | |
1253 | |
1254 // the resource area must be registered in case of a gc | |
1255 RegisterArrayForGC ragc(thread, local_array); | |
1142 | 1256 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(), |
0 | 1257 local_array->length(), CHECK_NULL); |
1258 objArrayHandle h_context(thread, context); | |
1259 for (int index = 0; index < local_array->length(); index++) { | |
1260 h_context->obj_at_put(index, local_array->at(index)); | |
1261 } | |
1262 | |
1263 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL); | |
1264 | |
1265 return JNIHandles::make_local(env, result); | |
1266 JVM_END | |
1267 | |
1268 | |
1269 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls)) | |
1270 JVMWrapper("JVM_IsArrayClass"); | |
1271 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1272 return (k != NULL) && Klass::cast(k)->oop_is_javaArray() ? true : false; | |
1273 JVM_END | |
1274 | |
1275 | |
1276 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls)) | |
1277 JVMWrapper("JVM_IsPrimitiveClass"); | |
1278 oop mirror = JNIHandles::resolve_non_null(cls); | |
1279 return (jboolean) java_lang_Class::is_primitive(mirror); | |
1280 JVM_END | |
1281 | |
1282 | |
1283 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls)) | |
1284 JVMWrapper("JVM_GetComponentType"); | |
1285 oop mirror = JNIHandles::resolve_non_null(cls); | |
1286 oop result = Reflection::array_component_type(mirror, CHECK_NULL); | |
1287 return (jclass) JNIHandles::make_local(env, result); | |
1288 JVM_END | |
1289 | |
1290 | |
1291 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls)) | |
1292 JVMWrapper("JVM_GetClassModifiers"); | |
1293 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1294 // Primitive type | |
1295 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; | |
1296 } | |
1297 | |
1298 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); | |
1299 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0)); | |
1300 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK"); | |
1301 return k->modifier_flags(); | |
1302 JVM_END | |
1303 | |
1304 | |
1305 // Inner class reflection /////////////////////////////////////////////////////////////////////////////// | |
1306 | |
1307 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass)) | |
1308 JvmtiVMObjectAllocEventCollector oam; | |
1309 // ofClass is a reference to a java_lang_Class object. The mirror object | |
1310 // of an instanceKlass | |
1311 | |
1312 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || | |
1313 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) { | |
1142 | 1314 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); |
0 | 1315 return (jobjectArray)JNIHandles::make_local(env, result); |
1316 } | |
1317 | |
1318 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
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1319 InnerClassesIterator iter(k); |
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1320 |
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1321 if (iter.length() == 0) { |
0 | 1322 // Neither an inner nor outer class |
1142 | 1323 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); |
0 | 1324 return (jobjectArray)JNIHandles::make_local(env, result); |
1325 } | |
1326 | |
1327 // find inner class info | |
1328 constantPoolHandle cp(thread, k->constants()); | |
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1329 int length = iter.length(); |
0 | 1330 |
1331 // Allocate temp. result array | |
1142 | 1332 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL); |
0 | 1333 objArrayHandle result (THREAD, r); |
1334 int members = 0; | |
1335 | |
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1336 for (; !iter.done(); iter.next()) { |
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1337 int ioff = iter.inner_class_info_index(); |
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1338 int ooff = iter.outer_class_info_index(); |
0 | 1339 |
1340 if (ioff != 0 && ooff != 0) { | |
1341 // Check to see if the name matches the class we're looking for | |
1342 // before attempting to find the class. | |
1343 if (cp->klass_name_at_matches(k, ooff)) { | |
1344 klassOop outer_klass = cp->klass_at(ooff, CHECK_NULL); | |
1345 if (outer_klass == k()) { | |
1346 klassOop ik = cp->klass_at(ioff, CHECK_NULL); | |
1347 instanceKlassHandle inner_klass (THREAD, ik); | |
1348 | |
1349 // Throws an exception if outer klass has not declared k as | |
1350 // an inner klass | |
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1351 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL); |
0 | 1352 |
1353 result->obj_at_put(members, inner_klass->java_mirror()); | |
1354 members++; | |
1355 } | |
1356 } | |
1357 } | |
1358 } | |
1359 | |
1360 if (members != length) { | |
1361 // Return array of right length | |
1142 | 1362 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL); |
0 | 1363 for(int i = 0; i < members; i++) { |
1364 res->obj_at_put(i, result->obj_at(i)); | |
1365 } | |
1366 return (jobjectArray)JNIHandles::make_local(env, res); | |
1367 } | |
1368 | |
1369 return (jobjectArray)JNIHandles::make_local(env, result()); | |
1370 JVM_END | |
1371 | |
1372 | |
1373 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass)) | |
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1374 { |
0 | 1375 // ofClass is a reference to a java_lang_Class object. |
1376 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || | |
1377 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) { | |
1378 return NULL; | |
1379 } | |
1380 | |
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1381 bool inner_is_member = false; |
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1382 klassOop outer_klass |
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1383 = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)) |
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1384 )->compute_enclosing_class(&inner_is_member, CHECK_NULL); |
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1385 if (outer_klass == NULL) return NULL; // already a top-level class |
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1386 if (!inner_is_member) return NULL; // an anonymous class (inside a method) |
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1387 return (jclass) JNIHandles::make_local(env, Klass::cast(outer_klass)->java_mirror()); |
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1388 } |
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1389 JVM_END |
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1390 |
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1391 // should be in instanceKlass.cpp, but is here for historical reasons |
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1392 klassOop instanceKlass::compute_enclosing_class_impl(instanceKlassHandle k, |
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1393 bool* inner_is_member, |
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1394 TRAPS) { |
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1395 Thread* thread = THREAD; |
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1396 InnerClassesIterator iter(k); |
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1397 if (iter.length() == 0) { |
0 | 1398 // No inner class info => no declaring class |
1399 return NULL; | |
1400 } | |
1401 | |
1402 constantPoolHandle i_cp(thread, k->constants()); | |
1403 | |
1404 bool found = false; | |
1405 klassOop ok; | |
1406 instanceKlassHandle outer_klass; | |
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1407 *inner_is_member = false; |
0 | 1408 |
1409 // Find inner_klass attribute | |
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1410 for (; !iter.done() && !found; iter.next()) { |
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1411 int ioff = iter.inner_class_info_index(); |
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1412 int ooff = iter.outer_class_info_index(); |
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1413 int noff = iter.inner_name_index(); |
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1414 if (ioff != 0) { |
0 | 1415 // Check to see if the name matches the class we're looking for |
1416 // before attempting to find the class. | |
1417 if (i_cp->klass_name_at_matches(k, ioff)) { | |
1418 klassOop inner_klass = i_cp->klass_at(ioff, CHECK_NULL); | |
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1419 found = (k() == inner_klass); |
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1420 if (found && ooff != 0) { |
0 | 1421 ok = i_cp->klass_at(ooff, CHECK_NULL); |
1422 outer_klass = instanceKlassHandle(thread, ok); | |
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1423 *inner_is_member = true; |
0 | 1424 } |
1425 } | |
1426 } | |
1427 } | |
1428 | |
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1429 if (found && outer_klass.is_null()) { |
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1430 // It may be anonymous; try for that. |
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1431 int encl_method_class_idx = k->enclosing_method_class_index(); |
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1432 if (encl_method_class_idx != 0) { |
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1433 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL); |
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1434 outer_klass = instanceKlassHandle(thread, ok); |
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1435 *inner_is_member = false; |
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1436 } |
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1437 } |
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1438 |
0 | 1439 // If no inner class attribute found for this class. |
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1440 if (outer_klass.is_null()) return NULL; |
0 | 1441 |
1442 // Throws an exception if outer klass has not declared k as an inner klass | |
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1443 // We need evidence that each klass knows about the other, or else |
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1444 // the system could allow a spoof of an inner class to gain access rights. |
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1445 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL); |
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1446 return outer_klass(); |
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1447 } |
0 | 1448 |
1449 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls)) | |
1450 assert (cls != NULL, "illegal class"); | |
1451 JVMWrapper("JVM_GetClassSignature"); | |
1452 JvmtiVMObjectAllocEventCollector oam; | |
1453 ResourceMark rm(THREAD); | |
1454 // Return null for arrays and primatives | |
1455 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
1456 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
1457 if (Klass::cast(k)->oop_is_instance()) { | |
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1458 Symbol* sym = instanceKlass::cast(k)->generic_signature(); |
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1459 if (sym == NULL) return NULL; |
0 | 1460 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); |
1461 return (jstring) JNIHandles::make_local(env, str()); | |
1462 } | |
1463 } | |
1464 return NULL; | |
1465 JVM_END | |
1466 | |
1467 | |
1468 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls)) | |
1469 assert (cls != NULL, "illegal class"); | |
1470 JVMWrapper("JVM_GetClassAnnotations"); | |
1471 ResourceMark rm(THREAD); | |
1472 // Return null for arrays and primitives | |
1473 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
1474 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
1475 if (Klass::cast(k)->oop_is_instance()) { | |
1476 return (jbyteArray) JNIHandles::make_local(env, | |
1477 instanceKlass::cast(k)->class_annotations()); | |
1478 } | |
1479 } | |
1480 return NULL; | |
1481 JVM_END | |
1482 | |
1483 | |
1484 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field)) | |
1485 assert(field != NULL, "illegal field"); | |
1486 JVMWrapper("JVM_GetFieldAnnotations"); | |
1487 | |
1488 // some of this code was adapted from from jni_FromReflectedField | |
1489 | |
1490 // field is a handle to a java.lang.reflect.Field object | |
1491 oop reflected = JNIHandles::resolve_non_null(field); | |
1492 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
1493 klassOop k = java_lang_Class::as_klassOop(mirror); | |
1494 int slot = java_lang_reflect_Field::slot(reflected); | |
1495 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
1496 | |
1497 fieldDescriptor fd; | |
1498 KlassHandle kh(THREAD, k); | |
3938 | 1499 intptr_t offset = instanceKlass::cast(kh())->field_offset(slot); |
0 | 1500 |
1501 if (modifiers & JVM_ACC_STATIC) { | |
1502 // for static fields we only look in the current class | |
1503 if (!instanceKlass::cast(kh())->find_local_field_from_offset(offset, | |
1504 true, &fd)) { | |
1505 assert(false, "cannot find static field"); | |
1506 return NULL; // robustness | |
1507 } | |
1508 } else { | |
1509 // for instance fields we start with the current class and work | |
1510 // our way up through the superclass chain | |
1511 if (!instanceKlass::cast(kh())->find_field_from_offset(offset, false, | |
1512 &fd)) { | |
1513 assert(false, "cannot find instance field"); | |
1514 return NULL; // robustness | |
1515 } | |
1516 } | |
1517 | |
1518 return (jbyteArray) JNIHandles::make_local(env, fd.annotations()); | |
1519 JVM_END | |
1520 | |
1521 | |
1522 static methodOop jvm_get_method_common(jobject method, TRAPS) { | |
1523 // some of this code was adapted from from jni_FromReflectedMethod | |
1524 | |
1525 oop reflected = JNIHandles::resolve_non_null(method); | |
1526 oop mirror = NULL; | |
1527 int slot = 0; | |
1528 | |
1142 | 1529 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { |
0 | 1530 mirror = java_lang_reflect_Constructor::clazz(reflected); |
1531 slot = java_lang_reflect_Constructor::slot(reflected); | |
1532 } else { | |
1142 | 1533 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), |
0 | 1534 "wrong type"); |
1535 mirror = java_lang_reflect_Method::clazz(reflected); | |
1536 slot = java_lang_reflect_Method::slot(reflected); | |
1537 } | |
1538 klassOop k = java_lang_Class::as_klassOop(mirror); | |
1539 | |
1540 KlassHandle kh(THREAD, k); | |
1541 methodOop m = instanceKlass::cast(kh())->method_with_idnum(slot); | |
1542 if (m == NULL) { | |
1543 assert(false, "cannot find method"); | |
1544 return NULL; // robustness | |
1545 } | |
1546 | |
1547 return m; | |
1548 } | |
1549 | |
1550 | |
1551 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method)) | |
1552 JVMWrapper("JVM_GetMethodAnnotations"); | |
1553 | |
1554 // method is a handle to a java.lang.reflect.Method object | |
1555 methodOop m = jvm_get_method_common(method, CHECK_NULL); | |
1556 return (jbyteArray) JNIHandles::make_local(env, m->annotations()); | |
1557 JVM_END | |
1558 | |
1559 | |
1560 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method)) | |
1561 JVMWrapper("JVM_GetMethodDefaultAnnotationValue"); | |
1562 | |
1563 // method is a handle to a java.lang.reflect.Method object | |
1564 methodOop m = jvm_get_method_common(method, CHECK_NULL); | |
1565 return (jbyteArray) JNIHandles::make_local(env, m->annotation_default()); | |
1566 JVM_END | |
1567 | |
1568 | |
1569 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method)) | |
1570 JVMWrapper("JVM_GetMethodParameterAnnotations"); | |
1571 | |
1572 // method is a handle to a java.lang.reflect.Method object | |
1573 methodOop m = jvm_get_method_common(method, CHECK_NULL); | |
1574 return (jbyteArray) JNIHandles::make_local(env, m->parameter_annotations()); | |
1575 JVM_END | |
1576 | |
1577 | |
1578 // New (JDK 1.4) reflection implementation ///////////////////////////////////// | |
1579 | |
1580 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly)) | |
1581 { | |
1582 JVMWrapper("JVM_GetClassDeclaredFields"); | |
1583 JvmtiVMObjectAllocEventCollector oam; | |
1584 | |
1585 // Exclude primitive types and array types | |
1586 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || | |
1587 Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { | |
1588 // Return empty array | |
1142 | 1589 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL); |
0 | 1590 return (jobjectArray) JNIHandles::make_local(env, res); |
1591 } | |
1592 | |
1593 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
1594 constantPoolHandle cp(THREAD, k->constants()); | |
1595 | |
1596 // Ensure class is linked | |
1597 k->link_class(CHECK_NULL); | |
1598 | |
1599 // 4496456 We need to filter out java.lang.Throwable.backtrace | |
1600 bool skip_backtrace = false; | |
1601 | |
1602 // Allocate result | |
1603 int num_fields; | |
1604 | |
1605 if (publicOnly) { | |
1606 num_fields = 0; | |
3938 | 1607 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) { |
1608 if (fs.access_flags().is_public()) ++num_fields; | |
0 | 1609 } |
1610 } else { | |
3938 | 1611 num_fields = k->java_fields_count(); |
0 | 1612 |
1142 | 1613 if (k() == SystemDictionary::Throwable_klass()) { |
0 | 1614 num_fields--; |
1615 skip_backtrace = true; | |
1616 } | |
1617 } | |
1618 | |
1142 | 1619 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL); |
0 | 1620 objArrayHandle result (THREAD, r); |
1621 | |
1622 int out_idx = 0; | |
1623 fieldDescriptor fd; | |
3938 | 1624 for (JavaFieldStream fs(k); !fs.done(); fs.next()) { |
0 | 1625 if (skip_backtrace) { |
1626 // 4496456 skip java.lang.Throwable.backtrace | |
3938 | 1627 int offset = fs.offset(); |
0 | 1628 if (offset == java_lang_Throwable::get_backtrace_offset()) continue; |
1629 } | |
1630 | |
3938 | 1631 if (!publicOnly || fs.access_flags().is_public()) { |
1632 fd.initialize(k(), fs.index()); | |
0 | 1633 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); |
1634 result->obj_at_put(out_idx, field); | |
1635 ++out_idx; | |
1636 } | |
1637 } | |
1638 assert(out_idx == num_fields, "just checking"); | |
1639 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1640 } | |
1641 JVM_END | |
1642 | |
1643 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) | |
1644 { | |
1645 JVMWrapper("JVM_GetClassDeclaredMethods"); | |
1646 JvmtiVMObjectAllocEventCollector oam; | |
1647 | |
1648 // Exclude primitive types and array types | |
1649 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) | |
1650 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { | |
1651 // Return empty array | |
1142 | 1652 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL); |
0 | 1653 return (jobjectArray) JNIHandles::make_local(env, res); |
1654 } | |
1655 | |
1656 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
1657 | |
1658 // Ensure class is linked | |
1659 k->link_class(CHECK_NULL); | |
1660 | |
1661 objArrayHandle methods (THREAD, k->methods()); | |
1662 int methods_length = methods->length(); | |
1663 int num_methods = 0; | |
1664 | |
1665 int i; | |
1666 for (i = 0; i < methods_length; i++) { | |
1667 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); | |
1668 if (!method->is_initializer()) { | |
1669 if (!publicOnly || method->is_public()) { | |
1670 ++num_methods; | |
1671 } | |
1672 } | |
1673 } | |
1674 | |
1675 // Allocate result | |
1142 | 1676 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL); |
0 | 1677 objArrayHandle result (THREAD, r); |
1678 | |
1679 int out_idx = 0; | |
1680 for (i = 0; i < methods_length; i++) { | |
1681 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); | |
1682 if (!method->is_initializer()) { | |
1683 if (!publicOnly || method->is_public()) { | |
1684 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); | |
1685 result->obj_at_put(out_idx, m); | |
1686 ++out_idx; | |
1687 } | |
1688 } | |
1689 } | |
1690 assert(out_idx == num_methods, "just checking"); | |
1691 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1692 } | |
1693 JVM_END | |
1694 | |
1695 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) | |
1696 { | |
1697 JVMWrapper("JVM_GetClassDeclaredConstructors"); | |
1698 JvmtiVMObjectAllocEventCollector oam; | |
1699 | |
1700 // Exclude primitive types and array types | |
1701 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) | |
1702 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { | |
1703 // Return empty array | |
1142 | 1704 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL); |
0 | 1705 return (jobjectArray) JNIHandles::make_local(env, res); |
1706 } | |
1707 | |
1708 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
1709 | |
1710 // Ensure class is linked | |
1711 k->link_class(CHECK_NULL); | |
1712 | |
1713 objArrayHandle methods (THREAD, k->methods()); | |
1714 int methods_length = methods->length(); | |
1715 int num_constructors = 0; | |
1716 | |
1717 int i; | |
1718 for (i = 0; i < methods_length; i++) { | |
1719 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); | |
1720 if (method->is_initializer() && !method->is_static()) { | |
1721 if (!publicOnly || method->is_public()) { | |
1722 ++num_constructors; | |
1723 } | |
1724 } | |
1725 } | |
1726 | |
1727 // Allocate result | |
1142 | 1728 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL); |
0 | 1729 objArrayHandle result(THREAD, r); |
1730 | |
1731 int out_idx = 0; | |
1732 for (i = 0; i < methods_length; i++) { | |
1733 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); | |
1734 if (method->is_initializer() && !method->is_static()) { | |
1735 if (!publicOnly || method->is_public()) { | |
1736 oop m = Reflection::new_constructor(method, CHECK_NULL); | |
1737 result->obj_at_put(out_idx, m); | |
1738 ++out_idx; | |
1739 } | |
1740 } | |
1741 } | |
1742 assert(out_idx == num_constructors, "just checking"); | |
1743 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1744 } | |
1745 JVM_END | |
1746 | |
1747 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls)) | |
1748 { | |
1749 JVMWrapper("JVM_GetClassAccessFlags"); | |
1750 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1751 // Primitive type | |
1752 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; | |
1753 } | |
1754 | |
1755 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); | |
1756 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS; | |
1757 } | |
1758 JVM_END | |
1759 | |
1760 | |
1761 // Constant pool access ////////////////////////////////////////////////////////// | |
1762 | |
1763 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls)) | |
1764 { | |
1765 JVMWrapper("JVM_GetClassConstantPool"); | |
1766 JvmtiVMObjectAllocEventCollector oam; | |
1767 | |
1768 // Return null for primitives and arrays | |
1769 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1770 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1771 if (Klass::cast(k)->oop_is_instance()) { | |
1772 instanceKlassHandle k_h(THREAD, k); | |
1773 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL); | |
1774 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants()); | |
1775 return JNIHandles::make_local(jcp()); | |
1776 } | |
1777 } | |
1778 return NULL; | |
1779 } | |
1780 JVM_END | |
1781 | |
1782 | |
1783 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool)) | |
1784 { | |
1785 JVMWrapper("JVM_ConstantPoolGetSize"); | |
1786 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1787 return cp->length(); | |
1788 } | |
1789 JVM_END | |
1790 | |
1791 | |
1792 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { | |
1793 if (!cp->is_within_bounds(index)) { | |
1794 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); | |
1795 } | |
1796 } | |
1797 | |
1798 | |
1799 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1800 { | |
1801 JVMWrapper("JVM_ConstantPoolGetClassAt"); | |
1802 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1803 bounds_check(cp, index, CHECK_NULL); | |
1804 constantTag tag = cp->tag_at(index); | |
1805 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
1806 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1807 } | |
1808 klassOop k = cp->klass_at(index, CHECK_NULL); | |
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1809 return (jclass) JNIHandles::make_local(k->java_mirror()); |
0 | 1810 } |
1811 JVM_END | |
1812 | |
1813 | |
1814 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1815 { | |
1816 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded"); | |
1817 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1818 bounds_check(cp, index, CHECK_NULL); | |
1819 constantTag tag = cp->tag_at(index); | |
1820 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
1821 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1822 } | |
1823 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index); | |
1824 if (k == NULL) return NULL; | |
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1825 return (jclass) JNIHandles::make_local(k->java_mirror()); |
0 | 1826 } |
1827 JVM_END | |
1828 | |
1829 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { | |
1830 constantTag tag = cp->tag_at(index); | |
1831 if (!tag.is_method() && !tag.is_interface_method()) { | |
1832 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1833 } | |
1834 int klass_ref = cp->uncached_klass_ref_index_at(index); | |
1835 klassOop k_o; | |
1836 if (force_resolution) { | |
1837 k_o = cp->klass_at(klass_ref, CHECK_NULL); | |
1838 } else { | |
1839 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref); | |
1840 if (k_o == NULL) return NULL; | |
1841 } | |
1842 instanceKlassHandle k(THREAD, k_o); | |
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1843 Symbol* name = cp->uncached_name_ref_at(index); |
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1844 Symbol* sig = cp->uncached_signature_ref_at(index); |
0 | 1845 methodHandle m (THREAD, k->find_method(name, sig)); |
1846 if (m.is_null()) { | |
1847 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class"); | |
1848 } | |
1849 oop method; | |
1850 if (!m->is_initializer() || m->is_static()) { | |
1851 method = Reflection::new_method(m, true, true, CHECK_NULL); | |
1852 } else { | |
1853 method = Reflection::new_constructor(m, CHECK_NULL); | |
1854 } | |
1855 return JNIHandles::make_local(method); | |
1856 } | |
1857 | |
1858 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1859 { | |
1860 JVMWrapper("JVM_ConstantPoolGetMethodAt"); | |
1861 JvmtiVMObjectAllocEventCollector oam; | |
1862 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1863 bounds_check(cp, index, CHECK_NULL); | |
1864 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL); | |
1865 return res; | |
1866 } | |
1867 JVM_END | |
1868 | |
1869 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1870 { | |
1871 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded"); | |
1872 JvmtiVMObjectAllocEventCollector oam; | |
1873 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1874 bounds_check(cp, index, CHECK_NULL); | |
1875 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL); | |
1876 return res; | |
1877 } | |
1878 JVM_END | |
1879 | |
1880 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { | |
1881 constantTag tag = cp->tag_at(index); | |
1882 if (!tag.is_field()) { | |
1883 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1884 } | |
1885 int klass_ref = cp->uncached_klass_ref_index_at(index); | |
1886 klassOop k_o; | |
1887 if (force_resolution) { | |
1888 k_o = cp->klass_at(klass_ref, CHECK_NULL); | |
1889 } else { | |
1890 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref); | |
1891 if (k_o == NULL) return NULL; | |
1892 } | |
1893 instanceKlassHandle k(THREAD, k_o); | |
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1894 Symbol* name = cp->uncached_name_ref_at(index); |
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1895 Symbol* sig = cp->uncached_signature_ref_at(index); |
0 | 1896 fieldDescriptor fd; |
1897 klassOop target_klass = k->find_field(name, sig, &fd); | |
1898 if (target_klass == NULL) { | |
1899 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class"); | |
1900 } | |
1901 oop field = Reflection::new_field(&fd, true, CHECK_NULL); | |
1902 return JNIHandles::make_local(field); | |
1903 } | |
1904 | |
1905 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1906 { | |
1907 JVMWrapper("JVM_ConstantPoolGetFieldAt"); | |
1908 JvmtiVMObjectAllocEventCollector oam; | |
1909 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1910 bounds_check(cp, index, CHECK_NULL); | |
1911 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL); | |
1912 return res; | |
1913 } | |
1914 JVM_END | |
1915 | |
1916 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1917 { | |
1918 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded"); | |
1919 JvmtiVMObjectAllocEventCollector oam; | |
1920 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1921 bounds_check(cp, index, CHECK_NULL); | |
1922 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL); | |
1923 return res; | |
1924 } | |
1925 JVM_END | |
1926 | |
1927 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1928 { | |
1929 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt"); | |
1930 JvmtiVMObjectAllocEventCollector oam; | |
1931 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1932 bounds_check(cp, index, CHECK_NULL); | |
1933 constantTag tag = cp->tag_at(index); | |
1934 if (!tag.is_field_or_method()) { | |
1935 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1936 } | |
1937 int klass_ref = cp->uncached_klass_ref_index_at(index); | |
2177
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1938 Symbol* klass_name = cp->klass_name_at(klass_ref); |
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1939 Symbol* member_name = cp->uncached_name_ref_at(index); |
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1940 Symbol* member_sig = cp->uncached_signature_ref_at(index); |
1142 | 1941 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL); |
0 | 1942 objArrayHandle dest(THREAD, dest_o); |
1943 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL); | |
1944 dest->obj_at_put(0, str()); | |
1945 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); | |
1946 dest->obj_at_put(1, str()); | |
1947 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); | |
1948 dest->obj_at_put(2, str()); | |
1949 return (jobjectArray) JNIHandles::make_local(dest()); | |
1950 } | |
1951 JVM_END | |
1952 | |
1953 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1954 { | |
1955 JVMWrapper("JVM_ConstantPoolGetIntAt"); | |
1956 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1957 bounds_check(cp, index, CHECK_0); | |
1958 constantTag tag = cp->tag_at(index); | |
1959 if (!tag.is_int()) { | |
1960 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1961 } | |
1962 return cp->int_at(index); | |
1963 } | |
1964 JVM_END | |
1965 | |
1966 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1967 { | |
1968 JVMWrapper("JVM_ConstantPoolGetLongAt"); | |
1969 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1970 bounds_check(cp, index, CHECK_(0L)); | |
1971 constantTag tag = cp->tag_at(index); | |
1972 if (!tag.is_long()) { | |
1973 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1974 } | |
1975 return cp->long_at(index); | |
1976 } | |
1977 JVM_END | |
1978 | |
1979 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1980 { | |
1981 JVMWrapper("JVM_ConstantPoolGetFloatAt"); | |
1982 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1983 bounds_check(cp, index, CHECK_(0.0f)); | |
1984 constantTag tag = cp->tag_at(index); | |
1985 if (!tag.is_float()) { | |
1986 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1987 } | |
1988 return cp->float_at(index); | |
1989 } | |
1990 JVM_END | |
1991 | |
1992 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1993 { | |
1994 JVMWrapper("JVM_ConstantPoolGetDoubleAt"); | |
1995 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1996 bounds_check(cp, index, CHECK_(0.0)); | |
1997 constantTag tag = cp->tag_at(index); | |
1998 if (!tag.is_double()) { | |
1999 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2000 } | |
2001 return cp->double_at(index); | |
2002 } | |
2003 JVM_END | |
2004 | |
2005 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
2006 { | |
2007 JVMWrapper("JVM_ConstantPoolGetStringAt"); | |
2008 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
2009 bounds_check(cp, index, CHECK_NULL); | |
2010 constantTag tag = cp->tag_at(index); | |
2011 if (!tag.is_string() && !tag.is_unresolved_string()) { | |
2012 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2013 } | |
2014 oop str = cp->string_at(index, CHECK_NULL); | |
2015 return (jstring) JNIHandles::make_local(str); | |
2016 } | |
2017 JVM_END | |
2018 | |
2019 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
2020 { | |
2021 JVMWrapper("JVM_ConstantPoolGetUTF8At"); | |
2022 JvmtiVMObjectAllocEventCollector oam; | |
2023 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
2024 bounds_check(cp, index, CHECK_NULL); | |
2025 constantTag tag = cp->tag_at(index); | |
2026 if (!tag.is_symbol()) { | |
2027 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2028 } | |
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2029 Symbol* sym = cp->symbol_at(index); |
0 | 2030 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); |
2031 return (jstring) JNIHandles::make_local(str()); | |
2032 } | |
2033 JVM_END | |
2034 | |
2035 | |
2036 // Assertion support. ////////////////////////////////////////////////////////// | |
2037 | |
2038 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls)) | |
2039 JVMWrapper("JVM_DesiredAssertionStatus"); | |
2040 assert(cls != NULL, "bad class"); | |
2041 | |
2042 oop r = JNIHandles::resolve(cls); | |
2043 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed"); | |
2044 if (java_lang_Class::is_primitive(r)) return false; | |
2045 | |
2046 klassOop k = java_lang_Class::as_klassOop(r); | |
2047 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass"); | |
2048 if (! Klass::cast(k)->oop_is_instance()) return false; | |
2049 | |
2050 ResourceMark rm(THREAD); | |
2051 const char* name = Klass::cast(k)->name()->as_C_string(); | |
2052 bool system_class = Klass::cast(k)->class_loader() == NULL; | |
2053 return JavaAssertions::enabled(name, system_class); | |
2054 | |
2055 JVM_END | |
2056 | |
2057 | |
2058 // Return a new AssertionStatusDirectives object with the fields filled in with | |
2059 // command-line assertion arguments (i.e., -ea, -da). | |
2060 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused)) | |
2061 JVMWrapper("JVM_AssertionStatusDirectives"); | |
2062 JvmtiVMObjectAllocEventCollector oam; | |
2063 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL); | |
2064 return JNIHandles::make_local(env, asd); | |
2065 JVM_END | |
2066 | |
2067 // Verification //////////////////////////////////////////////////////////////////////////////// | |
2068 | |
2069 // Reflection for the verifier ///////////////////////////////////////////////////////////////// | |
2070 | |
2071 // RedefineClasses support: bug 6214132 caused verification to fail. | |
2072 // All functions from this section should call the jvmtiThreadSate function: | |
2073 // klassOop class_to_verify_considering_redefinition(klassOop klass). | |
2074 // The function returns a klassOop of the _scratch_class if the verifier | |
2075 // was invoked in the middle of the class redefinition. | |
2076 // Otherwise it returns its argument value which is the _the_class klassOop. | |
2077 // Please, refer to the description in the jvmtiThreadSate.hpp. | |
2078 | |
2079 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls)) | |
2080 JVMWrapper("JVM_GetClassNameUTF"); | |
2081 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2082 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2083 return Klass::cast(k)->name()->as_utf8(); | |
2084 JVM_END | |
2085 | |
2086 | |
2087 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types)) | |
2088 JVMWrapper("JVM_GetClassCPTypes"); | |
2089 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2090 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2091 // types will have length zero if this is not an instanceKlass | |
2092 // (length is determined by call to JVM_GetClassCPEntriesCount) | |
2093 if (Klass::cast(k)->oop_is_instance()) { | |
2094 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2095 for (int index = cp->length() - 1; index >= 0; index--) { | |
2096 constantTag tag = cp->tag_at(index); | |
2097 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : | |
2098 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value(); | |
2099 } | |
2100 } | |
2101 JVM_END | |
2102 | |
2103 | |
2104 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls)) | |
2105 JVMWrapper("JVM_GetClassCPEntriesCount"); | |
2106 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2107 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2108 if (!Klass::cast(k)->oop_is_instance()) | |
2109 return 0; | |
2110 return instanceKlass::cast(k)->constants()->length(); | |
2111 JVM_END | |
2112 | |
2113 | |
2114 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls)) | |
2115 JVMWrapper("JVM_GetClassFieldsCount"); | |
2116 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2117 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2118 if (!Klass::cast(k)->oop_is_instance()) | |
2119 return 0; | |
3938 | 2120 return instanceKlass::cast(k)->java_fields_count(); |
0 | 2121 JVM_END |
2122 | |
2123 | |
2124 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls)) | |
2125 JVMWrapper("JVM_GetClassMethodsCount"); | |
2126 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2127 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2128 if (!Klass::cast(k)->oop_is_instance()) | |
2129 return 0; | |
2130 return instanceKlass::cast(k)->methods()->length(); | |
2131 JVM_END | |
2132 | |
2133 | |
2134 // The following methods, used for the verifier, are never called with | |
2135 // array klasses, so a direct cast to instanceKlass is safe. | |
2136 // Typically, these methods are called in a loop with bounds determined | |
2137 // by the results of JVM_GetClass{Fields,Methods}Count, which return | |
2138 // zero for arrays. | |
2139 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions)) | |
2140 JVMWrapper("JVM_GetMethodIxExceptionIndexes"); | |
2141 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2142 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2143 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2144 int length = methodOop(method)->checked_exceptions_length(); | |
2145 if (length > 0) { | |
2146 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start(); | |
2147 for (int i = 0; i < length; i++) { | |
2148 exceptions[i] = table[i].class_cp_index; | |
2149 } | |
2150 } | |
2151 JVM_END | |
2152 | |
2153 | |
2154 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index)) | |
2155 JVMWrapper("JVM_GetMethodIxExceptionsCount"); | |
2156 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2157 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2158 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2159 return methodOop(method)->checked_exceptions_length(); | |
2160 JVM_END | |
2161 | |
2162 | |
2163 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code)) | |
2164 JVMWrapper("JVM_GetMethodIxByteCode"); | |
2165 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2166 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2167 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2168 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size()); | |
2169 JVM_END | |
2170 | |
2171 | |
2172 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index)) | |
2173 JVMWrapper("JVM_GetMethodIxByteCodeLength"); | |
2174 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2175 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2176 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2177 return methodOop(method)->code_size(); | |
2178 JVM_END | |
2179 | |
2180 | |
2181 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry)) | |
2182 JVMWrapper("JVM_GetMethodIxExceptionTableEntry"); | |
2183 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2184 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2185 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2186 typeArrayOop extable = methodOop(method)->exception_table(); | |
2187 entry->start_pc = extable->int_at(entry_index * 4); | |
2188 entry->end_pc = extable->int_at(entry_index * 4 + 1); | |
2189 entry->handler_pc = extable->int_at(entry_index * 4 + 2); | |
2190 entry->catchType = extable->int_at(entry_index * 4 + 3); | |
2191 JVM_END | |
2192 | |
2193 | |
2194 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index)) | |
2195 JVMWrapper("JVM_GetMethodIxExceptionTableLength"); | |
2196 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2197 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2198 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2199 return methodOop(method)->exception_table()->length() / 4; | |
2200 JVM_END | |
2201 | |
2202 | |
2203 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index)) | |
2204 JVMWrapper("JVM_GetMethodIxModifiers"); | |
2205 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2206 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2207 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2208 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; | |
2209 JVM_END | |
2210 | |
2211 | |
2212 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index)) | |
2213 JVMWrapper("JVM_GetFieldIxModifiers"); | |
2214 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2215 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
3938 | 2216 return instanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS; |
0 | 2217 JVM_END |
2218 | |
2219 | |
2220 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index)) | |
2221 JVMWrapper("JVM_GetMethodIxLocalsCount"); | |
2222 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2223 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2224 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2225 return methodOop(method)->max_locals(); | |
2226 JVM_END | |
2227 | |
2228 | |
2229 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index)) | |
2230 JVMWrapper("JVM_GetMethodIxArgsSize"); | |
2231 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2232 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2233 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2234 return methodOop(method)->size_of_parameters(); | |
2235 JVM_END | |
2236 | |
2237 | |
2238 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index)) | |
2239 JVMWrapper("JVM_GetMethodIxMaxStack"); | |
2240 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2241 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2242 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2243 return methodOop(method)->max_stack(); | |
2244 JVM_END | |
2245 | |
2246 | |
2247 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index)) | |
2248 JVMWrapper("JVM_IsConstructorIx"); | |
2249 ResourceMark rm(THREAD); | |
2250 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2251 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2252 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2253 return methodOop(method)->name() == vmSymbols::object_initializer_name(); | |
2254 JVM_END | |
2255 | |
2256 | |
2257 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index)) | |
2258 JVMWrapper("JVM_GetMethodIxIxUTF"); | |
2259 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2260 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2261 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2262 return methodOop(method)->name()->as_utf8(); | |
2263 JVM_END | |
2264 | |
2265 | |
2266 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index)) | |
2267 JVMWrapper("JVM_GetMethodIxSignatureUTF"); | |
2268 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2269 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2270 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2271 return methodOop(method)->signature()->as_utf8(); | |
2272 JVM_END | |
2273 | |
2274 /** | |
2275 * All of these JVM_GetCP-xxx methods are used by the old verifier to | |
2276 * read entries in the constant pool. Since the old verifier always | |
2277 * works on a copy of the code, it will not see any rewriting that | |
2278 * may possibly occur in the middle of verification. So it is important | |
2279 * that nothing it calls tries to use the cpCache instead of the raw | |
2280 * constant pool, so we must use cp->uncached_x methods when appropriate. | |
2281 */ | |
2282 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2283 JVMWrapper("JVM_GetCPFieldNameUTF"); | |
2284 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2285 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2286 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2287 switch (cp->tag_at(cp_index).value()) { | |
2288 case JVM_CONSTANT_Fieldref: | |
2289 return cp->uncached_name_ref_at(cp_index)->as_utf8(); | |
2290 default: | |
2291 fatal("JVM_GetCPFieldNameUTF: illegal constant"); | |
2292 } | |
2293 ShouldNotReachHere(); | |
2294 return NULL; | |
2295 JVM_END | |
2296 | |
2297 | |
2298 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2299 JVMWrapper("JVM_GetCPMethodNameUTF"); | |
2300 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2301 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2302 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2303 switch (cp->tag_at(cp_index).value()) { | |
2304 case JVM_CONSTANT_InterfaceMethodref: | |
2305 case JVM_CONSTANT_Methodref: | |
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|
2306 case JVM_CONSTANT_NameAndType: // for invokedynamic |
0 | 2307 return cp->uncached_name_ref_at(cp_index)->as_utf8(); |
2308 default: | |
2309 fatal("JVM_GetCPMethodNameUTF: illegal constant"); | |
2310 } | |
2311 ShouldNotReachHere(); | |
2312 return NULL; | |
2313 JVM_END | |
2314 | |
2315 | |
2316 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2317 JVMWrapper("JVM_GetCPMethodSignatureUTF"); | |
2318 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2319 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2320 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2321 switch (cp->tag_at(cp_index).value()) { | |
2322 case JVM_CONSTANT_InterfaceMethodref: | |
2323 case JVM_CONSTANT_Methodref: | |
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diff
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|
2324 case JVM_CONSTANT_NameAndType: // for invokedynamic |
0 | 2325 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); |
2326 default: | |
2327 fatal("JVM_GetCPMethodSignatureUTF: illegal constant"); | |
2328 } | |
2329 ShouldNotReachHere(); | |
2330 return NULL; | |
2331 JVM_END | |
2332 | |
2333 | |
2334 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2335 JVMWrapper("JVM_GetCPFieldSignatureUTF"); | |
2336 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2337 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2338 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2339 switch (cp->tag_at(cp_index).value()) { | |
2340 case JVM_CONSTANT_Fieldref: | |
2341 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); | |
2342 default: | |
2343 fatal("JVM_GetCPFieldSignatureUTF: illegal constant"); | |
2344 } | |
2345 ShouldNotReachHere(); | |
2346 return NULL; | |
2347 JVM_END | |
2348 | |
2349 | |
2350 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2351 JVMWrapper("JVM_GetCPClassNameUTF"); | |
2352 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2353 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2354 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
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changeset
|
2355 Symbol* classname = cp->klass_name_at(cp_index); |
0 | 2356 return classname->as_utf8(); |
2357 JVM_END | |
2358 | |
2359 | |
2360 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2361 JVMWrapper("JVM_GetCPFieldClassNameUTF"); | |
2362 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2363 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2364 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2365 switch (cp->tag_at(cp_index).value()) { | |
2366 case JVM_CONSTANT_Fieldref: { | |
2367 int class_index = cp->uncached_klass_ref_index_at(cp_index); | |
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changeset
|
2368 Symbol* classname = cp->klass_name_at(class_index); |
0 | 2369 return classname->as_utf8(); |
2370 } | |
2371 default: | |
2372 fatal("JVM_GetCPFieldClassNameUTF: illegal constant"); | |
2373 } | |
2374 ShouldNotReachHere(); | |
2375 return NULL; | |
2376 JVM_END | |
2377 | |
2378 | |
2379 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2380 JVMWrapper("JVM_GetCPMethodClassNameUTF"); | |
2381 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2382 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2383 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2384 switch (cp->tag_at(cp_index).value()) { | |
2385 case JVM_CONSTANT_Methodref: | |
2386 case JVM_CONSTANT_InterfaceMethodref: { | |
2387 int class_index = cp->uncached_klass_ref_index_at(cp_index); | |
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|
2388 Symbol* classname = cp->klass_name_at(class_index); |
0 | 2389 return classname->as_utf8(); |
2390 } | |
2391 default: | |
2392 fatal("JVM_GetCPMethodClassNameUTF: illegal constant"); | |
2393 } | |
2394 ShouldNotReachHere(); | |
2395 return NULL; | |
2396 JVM_END | |
2397 | |
2398 | |
3938 | 2399 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) |
0 | 2400 JVMWrapper("JVM_GetCPFieldModifiers"); |
2401 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2402 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls)); | |
2403 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2404 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); | |
2405 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2406 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants(); | |
2407 switch (cp->tag_at(cp_index).value()) { | |
2408 case JVM_CONSTANT_Fieldref: { | |
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6990754: Use native memory and reference counting to implement SymbolTable
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|
2409 Symbol* name = cp->uncached_name_ref_at(cp_index); |
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6990754: Use native memory and reference counting to implement SymbolTable
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|
2410 Symbol* signature = cp->uncached_signature_ref_at(cp_index); |
3938 | 2411 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) { |
2412 if (fs.name() == name && fs.signature() == signature) { | |
2413 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
0 | 2414 } |
2415 } | |
2416 return -1; | |
2417 } | |
2418 default: | |
2419 fatal("JVM_GetCPFieldModifiers: illegal constant"); | |
2420 } | |
2421 ShouldNotReachHere(); | |
2422 return 0; | |
2423 JVM_END | |
2424 | |
2425 | |
2426 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) | |
2427 JVMWrapper("JVM_GetCPMethodModifiers"); | |
2428 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2429 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls)); | |
2430 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2431 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); | |
2432 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2433 switch (cp->tag_at(cp_index).value()) { | |
2434 case JVM_CONSTANT_Methodref: | |
2435 case JVM_CONSTANT_InterfaceMethodref: { | |
2177
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diff
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|
2436 Symbol* name = cp->uncached_name_ref_at(cp_index); |
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6990754: Use native memory and reference counting to implement SymbolTable
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2162
diff
changeset
|
2437 Symbol* signature = cp->uncached_signature_ref_at(cp_index); |
0 | 2438 objArrayOop methods = instanceKlass::cast(k_called)->methods(); |
2439 int methods_count = methods->length(); | |
2440 for (int i = 0; i < methods_count; i++) { | |
2441 methodOop method = methodOop(methods->obj_at(i)); | |
2442 if (method->name() == name && method->signature() == signature) { | |
2443 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; | |
2444 } | |
2445 } | |
2446 return -1; | |
2447 } | |
2448 default: | |
2449 fatal("JVM_GetCPMethodModifiers: illegal constant"); | |
2450 } | |
2451 ShouldNotReachHere(); | |
2452 return 0; | |
2453 JVM_END | |
2454 | |
2455 | |
2456 // Misc ////////////////////////////////////////////////////////////////////////////////////////////// | |
2457 | |
2458 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf)) | |
2459 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything | |
2460 JVM_END | |
2461 | |
2462 | |
2463 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2)) | |
2464 JVMWrapper("JVM_IsSameClassPackage"); | |
2465 oop class1_mirror = JNIHandles::resolve_non_null(class1); | |
2466 oop class2_mirror = JNIHandles::resolve_non_null(class2); | |
2467 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror); | |
2468 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror); | |
2469 return (jboolean) Reflection::is_same_class_package(klass1, klass2); | |
2470 JVM_END | |
2471 | |
2472 | |
2473 // IO functions //////////////////////////////////////////////////////////////////////////////////////// | |
2474 | |
2475 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode)) | |
2476 JVMWrapper2("JVM_Open (%s)", fname); | |
2477 | |
2478 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2479 int result = os::open(fname, flags, mode); |
0 | 2480 if (result >= 0) { |
2481 return result; | |
2482 } else { | |
2483 switch(errno) { | |
2484 case EEXIST: | |
2485 return JVM_EEXIST; | |
2486 default: | |
2487 return -1; | |
2488 } | |
2489 } | |
2490 JVM_END | |
2491 | |
2492 | |
2493 JVM_LEAF(jint, JVM_Close(jint fd)) | |
2494 JVMWrapper2("JVM_Close (0x%x)", fd); | |
2495 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
2496 return os::close(fd); |
0 | 2497 JVM_END |
2498 | |
2499 | |
2500 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes)) | |
2501 JVMWrapper2("JVM_Read (0x%x)", fd); | |
2502 | |
2503 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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diff
changeset
|
2504 return (jint)os::restartable_read(fd, buf, nbytes); |
0 | 2505 JVM_END |
2506 | |
2507 | |
2508 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes)) | |
2509 JVMWrapper2("JVM_Write (0x%x)", fd); | |
2510 | |
2511 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
2512 return (jint)os::write(fd, buf, nbytes); |
0 | 2513 JVM_END |
2514 | |
2515 | |
2516 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes)) | |
2517 JVMWrapper2("JVM_Available (0x%x)", fd); | |
2518 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
2519 return os::available(fd, pbytes); |
0 | 2520 JVM_END |
2521 | |
2522 | |
2523 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence)) | |
2524 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence); | |
2525 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2526 return os::lseek(fd, offset, whence); |
0 | 2527 JVM_END |
2528 | |
2529 | |
2530 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length)) | |
2531 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length); | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2532 return os::ftruncate(fd, length); |
0 | 2533 JVM_END |
2534 | |
2535 | |
2536 JVM_LEAF(jint, JVM_Sync(jint fd)) | |
2537 JVMWrapper2("JVM_Sync (0x%x)", fd); | |
2538 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2539 return os::fsync(fd); |
0 | 2540 JVM_END |
2541 | |
2542 | |
2543 // Printing support ////////////////////////////////////////////////// | |
2544 extern "C" { | |
2545 | |
2546 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) { | |
2547 // see bug 4399518, 4417214 | |
2548 if ((intptr_t)count <= 0) return -1; | |
2549 return vsnprintf(str, count, fmt, args); | |
2550 } | |
2551 | |
2552 | |
2553 int jio_snprintf(char *str, size_t count, const char *fmt, ...) { | |
2554 va_list args; | |
2555 int len; | |
2556 va_start(args, fmt); | |
2557 len = jio_vsnprintf(str, count, fmt, args); | |
2558 va_end(args); | |
2559 return len; | |
2560 } | |
2561 | |
2562 | |
2563 int jio_fprintf(FILE* f, const char *fmt, ...) { | |
2564 int len; | |
2565 va_list args; | |
2566 va_start(args, fmt); | |
2567 len = jio_vfprintf(f, fmt, args); | |
2568 va_end(args); | |
2569 return len; | |
2570 } | |
2571 | |
2572 | |
2573 int jio_vfprintf(FILE* f, const char *fmt, va_list args) { | |
2574 if (Arguments::vfprintf_hook() != NULL) { | |
2575 return Arguments::vfprintf_hook()(f, fmt, args); | |
2576 } else { | |
2577 return vfprintf(f, fmt, args); | |
2578 } | |
2579 } | |
2580 | |
2581 | |
2191 | 2582 JNIEXPORT int jio_printf(const char *fmt, ...) { |
0 | 2583 int len; |
2584 va_list args; | |
2585 va_start(args, fmt); | |
2586 len = jio_vfprintf(defaultStream::output_stream(), fmt, args); | |
2587 va_end(args); | |
2588 return len; | |
2589 } | |
2590 | |
2591 | |
2592 // HotSpot specific jio method | |
2593 void jio_print(const char* s) { | |
2594 // Try to make this function as atomic as possible. | |
2595 if (Arguments::vfprintf_hook() != NULL) { | |
2596 jio_fprintf(defaultStream::output_stream(), "%s", s); | |
2597 } else { | |
513
2328d1d3f8cf
6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2
xlu
parents:
431
diff
changeset
|
2598 // Make an unused local variable to avoid warning from gcc 4.x compiler. |
2328d1d3f8cf
6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2
xlu
parents:
431
diff
changeset
|
2599 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s)); |
0 | 2600 } |
2601 } | |
2602 | |
2603 } // Extern C | |
2604 | |
2605 // java.lang.Thread ////////////////////////////////////////////////////////////////////////////// | |
2606 | |
2607 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock | |
2608 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or | |
2609 // OSThread objects. The exception to this rule is when the target object is the thread | |
2610 // doing the operation, in which case we know that the thread won't exit until the | |
2611 // operation is done (all exits being voluntary). There are a few cases where it is | |
2612 // rather silly to do operations on yourself, like resuming yourself or asking whether | |
2613 // you are alive. While these can still happen, they are not subject to deadlocks if | |
2614 // the lock is held while the operation occurs (this is not the case for suspend, for | |
2615 // instance), and are very unlikely. Because IsAlive needs to be fast and its | |
2616 // implementation is local to this file, we always lock Threads_lock for that one. | |
2617 | |
2618 static void thread_entry(JavaThread* thread, TRAPS) { | |
2619 HandleMark hm(THREAD); | |
2620 Handle obj(THREAD, thread->threadObj()); | |
2621 JavaValue result(T_VOID); | |
2622 JavaCalls::call_virtual(&result, | |
2623 obj, | |
1142 | 2624 KlassHandle(THREAD, SystemDictionary::Thread_klass()), |
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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2162
diff
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|
2625 vmSymbols::run_method_name(), |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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2162
diff
changeset
|
2626 vmSymbols::void_method_signature(), |
0 | 2627 THREAD); |
2628 } | |
2629 | |
2630 | |
2631 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread)) | |
2632 JVMWrapper("JVM_StartThread"); | |
2633 JavaThread *native_thread = NULL; | |
2634 | |
2635 // We cannot hold the Threads_lock when we throw an exception, | |
2636 // due to rank ordering issues. Example: we might need to grab the | |
2637 // Heap_lock while we construct the exception. | |
2638 bool throw_illegal_thread_state = false; | |
2639 | |
2640 // We must release the Threads_lock before we can post a jvmti event | |
2641 // in Thread::start. | |
2642 { | |
2643 // Ensure that the C++ Thread and OSThread structures aren't freed before | |
2644 // we operate. | |
2645 MutexLocker mu(Threads_lock); | |
2646 | |
2162
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2647 // 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
|
2648 // 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
|
2649 // that the JavaThread is null. However for a JNI attached thread |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2650 // there is a small window between the Thread object being created |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2651 // (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
|
2652 // 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
|
2653 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
|
2654 throw_illegal_thread_state = true; |
0 | 2655 } else { |
2162
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2656 // 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
|
2657 // for historical reasons we let the thread detect that itself when it starts running |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2658 |
0 | 2659 jlong size = |
2660 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread)); | |
2661 // Allocate the C++ Thread structure and create the native thread. The | |
2662 // stack size retrieved from java is signed, but the constructor takes | |
2663 // size_t (an unsigned type), so avoid passing negative values which would | |
2664 // result in really large stacks. | |
2665 size_t sz = size > 0 ? (size_t) size : 0; | |
2666 native_thread = new JavaThread(&thread_entry, sz); | |
2667 | |
2668 // At this point it may be possible that no osthread was created for the | |
2669 // JavaThread due to lack of memory. Check for this situation and throw | |
2670 // an exception if necessary. Eventually we may want to change this so | |
2671 // that we only grab the lock if the thread was created successfully - | |
2672 // then we can also do this check and throw the exception in the | |
2673 // JavaThread constructor. | |
2674 if (native_thread->osthread() != NULL) { | |
2675 // Note: the current thread is not being used within "prepare". | |
2676 native_thread->prepare(jthread); | |
2677 } | |
2678 } | |
2679 } | |
2680 | |
2681 if (throw_illegal_thread_state) { | |
2682 THROW(vmSymbols::java_lang_IllegalThreadStateException()); | |
2683 } | |
2684 | |
2685 assert(native_thread != NULL, "Starting null thread?"); | |
2686 | |
2687 if (native_thread->osthread() == NULL) { | |
2688 // No one should hold a reference to the 'native_thread'. | |
2689 delete native_thread; | |
2690 if (JvmtiExport::should_post_resource_exhausted()) { | |
2691 JvmtiExport::post_resource_exhausted( | |
2692 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS, | |
2693 "unable to create new native thread"); | |
2694 } | |
2695 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), | |
2696 "unable to create new native thread"); | |
2697 } | |
2698 | |
2699 Thread::start(native_thread); | |
2700 | |
2701 JVM_END | |
2702 | |
2703 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints | |
2704 // before the quasi-asynchronous exception is delivered. This is a little obtrusive, | |
2705 // but is thought to be reliable and simple. In the case, where the receiver is the | |
2162
ccfcb502af3f
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diff
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|
2706 // same thread as the sender, no safepoint is needed. |
0 | 2707 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable)) |
2708 JVMWrapper("JVM_StopThread"); | |
2709 | |
2710 oop java_throwable = JNIHandles::resolve(throwable); | |
2711 if (java_throwable == NULL) { | |
2712 THROW(vmSymbols::java_lang_NullPointerException()); | |
2713 } | |
2714 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2715 JavaThread* receiver = java_lang_Thread::thread(java_thread); | |
4872
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7141200: log some interesting information in ring buffers for crashes
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parents:
4717
diff
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|
2716 Events::log_exception(JavaThread::current(), |
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parents:
4717
diff
changeset
|
2717 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", |
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4717
diff
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|
2718 receiver, (address)java_thread, throwable); |
2162
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6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
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diff
changeset
|
2719 // First check if thread is alive |
0 | 2720 if (receiver != NULL) { |
2721 // Check if exception is getting thrown at self (use oop equality, since the | |
2722 // target object might exit) | |
2723 if (java_thread == thread->threadObj()) { | |
2724 THROW_OOP(java_throwable); | |
2725 } else { | |
2726 // Enques a VM_Operation to stop all threads and then deliver the exception... | |
2727 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable)); | |
2728 } | |
2729 } | |
2162
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1980
diff
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|
2730 else { |
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
|
2731 // Either: |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
1980
diff
changeset
|
2732 // - 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
|
2733 // - 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
|
2734 // 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
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parents:
1980
diff
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|
2735 // 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
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|
2736 // 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
|
2737 // exited setting this flag has no affect |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
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diff
changeset
|
2738 java_lang_Thread::set_stillborn(java_thread); |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
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1980
diff
changeset
|
2739 } |
0 | 2740 JVM_END |
2741 | |
2742 | |
2743 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread)) | |
2744 JVMWrapper("JVM_IsThreadAlive"); | |
2745 | |
2746 oop thread_oop = JNIHandles::resolve_non_null(jthread); | |
2747 return java_lang_Thread::is_alive(thread_oop); | |
2748 JVM_END | |
2749 | |
2750 | |
2751 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread)) | |
2752 JVMWrapper("JVM_SuspendThread"); | |
2753 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2754 JavaThread* receiver = java_lang_Thread::thread(java_thread); | |
2755 | |
2756 if (receiver != NULL) { | |
2757 // thread has run and has not exited (still on threads list) | |
2758 | |
2759 { | |
2760 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag); | |
2761 if (receiver->is_external_suspend()) { | |
2762 // Don't allow nested external suspend requests. We can't return | |
2763 // an error from this interface so just ignore the problem. | |
2764 return; | |
2765 } | |
2766 if (receiver->is_exiting()) { // thread is in the process of exiting | |
2767 return; | |
2768 } | |
2769 receiver->set_external_suspend(); | |
2770 } | |
2771 | |
2772 // java_suspend() will catch threads in the process of exiting | |
2773 // and will ignore them. | |
2774 receiver->java_suspend(); | |
2775 | |
2776 // It would be nice to have the following assertion in all the | |
2777 // time, but it is possible for a racing resume request to have | |
2778 // resumed this thread right after we suspended it. Temporarily | |
2779 // enable this assertion if you are chasing a different kind of | |
2780 // bug. | |
2781 // | |
2782 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL || | |
2783 // receiver->is_being_ext_suspended(), "thread is not suspended"); | |
2784 } | |
2785 JVM_END | |
2786 | |
2787 | |
2788 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread)) | |
2789 JVMWrapper("JVM_ResumeThread"); | |
2790 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate. | |
2791 // We need to *always* get the threads lock here, since this operation cannot be allowed during | |
2792 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other | |
2793 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code | |
2794 // looks at it. | |
2795 MutexLocker ml(Threads_lock); | |
2796 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
2797 if (thr != NULL) { | |
2798 // the thread has run and is not in the process of exiting | |
2799 thr->java_resume(); | |
2800 } | |
2801 JVM_END | |
2802 | |
2803 | |
2804 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio)) | |
2805 JVMWrapper("JVM_SetThreadPriority"); | |
2806 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
2807 MutexLocker ml(Threads_lock); | |
2808 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2809 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio); | |
2810 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
2811 if (thr != NULL) { // Thread not yet started; priority pushed down when it is | |
2812 Thread::set_priority(thr, (ThreadPriority)prio); | |
2813 } | |
2814 JVM_END | |
2815 | |
2816 | |
2817 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass)) | |
2818 JVMWrapper("JVM_Yield"); | |
2819 if (os::dont_yield()) return; | |
4006 | 2820 #ifndef USDT2 |
1324
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1144
diff
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|
2821 HS_DTRACE_PROBE0(hotspot, thread__yield); |
4006 | 2822 #else /* USDT2 */ |
2823 HOTSPOT_THREAD_YIELD(); | |
2824 #endif /* USDT2 */ | |
0 | 2825 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield. |
2826 // Critical for similar threading behaviour | |
2827 if (ConvertYieldToSleep) { | |
2828 os::sleep(thread, MinSleepInterval, false); | |
2829 } else { | |
2830 os::yield(); | |
2831 } | |
2832 JVM_END | |
2833 | |
2834 | |
2835 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis)) | |
2836 JVMWrapper("JVM_Sleep"); | |
2837 | |
2838 if (millis < 0) { | |
2839 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative"); | |
2840 } | |
2841 | |
2842 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) { | |
2843 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); | |
2844 } | |
2845 | |
2846 // Save current thread state and restore it at the end of this block. | |
2847 // And set new thread state to SLEEPING. | |
2848 JavaThreadSleepState jtss(thread); | |
2849 | |
4006 | 2850 #ifndef USDT2 |
1324
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1144
diff
changeset
|
2851 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis); |
4006 | 2852 #else /* USDT2 */ |
2853 HOTSPOT_THREAD_SLEEP_BEGIN( | |
2854 millis); | |
2855 #endif /* USDT2 */ | |
1324
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diff
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|
2856 |
0 | 2857 if (millis == 0) { |
2858 // When ConvertSleepToYield is on, this matches the classic VM implementation of | |
2859 // JVM_Sleep. Critical for similar threading behaviour (Win32) | |
2860 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep | |
2861 // for SOLARIS | |
2862 if (ConvertSleepToYield) { | |
2863 os::yield(); | |
2864 } else { | |
2865 ThreadState old_state = thread->osthread()->get_state(); | |
2866 thread->osthread()->set_state(SLEEPING); | |
2867 os::sleep(thread, MinSleepInterval, false); | |
2868 thread->osthread()->set_state(old_state); | |
2869 } | |
2870 } else { | |
2871 ThreadState old_state = thread->osthread()->get_state(); | |
2872 thread->osthread()->set_state(SLEEPING); | |
2873 if (os::sleep(thread, millis, true) == OS_INTRPT) { | |
2874 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on | |
2875 // us while we were sleeping. We do not overwrite those. | |
2876 if (!HAS_PENDING_EXCEPTION) { | |
4006 | 2877 #ifndef USDT2 |
1324
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fparain
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1144
diff
changeset
|
2878 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1); |
4006 | 2879 #else /* USDT2 */ |
2880 HOTSPOT_THREAD_SLEEP_END( | |
2881 1); | |
2882 #endif /* USDT2 */ | |
0 | 2883 // TODO-FIXME: THROW_MSG returns which means we will not call set_state() |
2884 // to properly restore the thread state. That's likely wrong. | |
2885 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); | |
2886 } | |
2887 } | |
2888 thread->osthread()->set_state(old_state); | |
2889 } | |
4006 | 2890 #ifndef USDT2 |
1324
e392695de029
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diff
changeset
|
2891 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0); |
4006 | 2892 #else /* USDT2 */ |
2893 HOTSPOT_THREAD_SLEEP_END( | |
2894 0); | |
2895 #endif /* USDT2 */ | |
0 | 2896 JVM_END |
2897 | |
2898 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) | |
2899 JVMWrapper("JVM_CurrentThread"); | |
2900 oop jthread = thread->threadObj(); | |
2901 assert (thread != NULL, "no current thread!"); | |
2902 return JNIHandles::make_local(env, jthread); | |
2903 JVM_END | |
2904 | |
2905 | |
2906 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread)) | |
2907 JVMWrapper("JVM_CountStackFrames"); | |
2908 | |
2909 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
2910 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2911 bool throw_illegal_thread_state = false; | |
2912 int count = 0; | |
2913 | |
2914 { | |
2915 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); | |
2916 // We need to re-resolve the java_thread, since a GC might have happened during the | |
2917 // acquire of the lock | |
2918 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
2919 | |
2920 if (thr == NULL) { | |
2921 // do nothing | |
2922 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) { | |
2923 // Check whether this java thread has been suspended already. If not, throws | |
2924 // IllegalThreadStateException. We defer to throw that exception until | |
2925 // Threads_lock is released since loading exception class has to leave VM. | |
2926 // The correct way to test a thread is actually suspended is | |
2927 // wait_for_ext_suspend_completion(), but we can't call that while holding | |
2928 // the Threads_lock. The above tests are sufficient for our purposes | |
2929 // provided the walkability of the stack is stable - which it isn't | |
2930 // 100% but close enough for most practical purposes. | |
2931 throw_illegal_thread_state = true; | |
2932 } else { | |
2933 // Count all java activation, i.e., number of vframes | |
2934 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) { | |
2935 // Native frames are not counted | |
2936 if (!vfst.method()->is_native()) count++; | |
2937 } | |
2938 } | |
2939 } | |
2940 | |
2941 if (throw_illegal_thread_state) { | |
2942 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(), | |
2943 "this thread is not suspended"); | |
2944 } | |
2945 return count; | |
2946 JVM_END | |
2947 | |
2948 // Consider: A better way to implement JVM_Interrupt() is to acquire | |
2949 // Threads_lock to resolve the jthread into a Thread pointer, fetch | |
2950 // Thread->platformevent, Thread->native_thr, Thread->parker, etc., | |
2951 // drop Threads_lock, and the perform the unpark() and thr_kill() operations | |
2952 // outside the critical section. Threads_lock is hot so we want to minimize | |
2953 // the hold-time. A cleaner interface would be to decompose interrupt into | |
2954 // two steps. The 1st phase, performed under Threads_lock, would return | |
2955 // a closure that'd be invoked after Threads_lock was dropped. | |
2956 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and | |
2957 // admit spurious wakeups. | |
2958 | |
2959 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread)) | |
2960 JVMWrapper("JVM_Interrupt"); | |
2961 | |
2962 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
2963 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2964 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); | |
2965 // We need to re-resolve the java_thread, since a GC might have happened during the | |
2966 // acquire of the lock | |
2967 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
2968 if (thr != NULL) { | |
2969 Thread::interrupt(thr); | |
2970 } | |
2971 JVM_END | |
2972 | |
2973 | |
2974 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted)) | |
2975 JVMWrapper("JVM_IsInterrupted"); | |
2976 | |
2977 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
2978 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2979 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); | |
2980 // We need to re-resolve the java_thread, since a GC might have happened during the | |
2981 // acquire of the lock | |
2982 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
2983 if (thr == NULL) { | |
2984 return JNI_FALSE; | |
2985 } else { | |
2986 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0); | |
2987 } | |
2988 JVM_END | |
2989 | |
2990 | |
2991 // Return true iff the current thread has locked the object passed in | |
2992 | |
2993 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj)) | |
2994 JVMWrapper("JVM_HoldsLock"); | |
2995 assert(THREAD->is_Java_thread(), "sanity check"); | |
2996 if (obj == NULL) { | |
2997 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
2998 } | |
2999 Handle h_obj(THREAD, JNIHandles::resolve(obj)); | |
3000 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj); | |
3001 JVM_END | |
3002 | |
3003 | |
3004 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass)) | |
3005 JVMWrapper("JVM_DumpAllStacks"); | |
3006 VM_PrintThreads op; | |
3007 VMThread::execute(&op); | |
3008 if (JvmtiExport::should_post_data_dump()) { | |
3009 JvmtiExport::post_data_dump(); | |
3010 } | |
3011 JVM_END | |
3012 | |
4006 | 3013 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name)) |
3014 JVMWrapper("JVM_SetNativeThreadName"); | |
3015 ResourceMark rm(THREAD); | |
3016 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
3017 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
3018 // Thread naming only supported for the current thread, doesn't work for | |
3019 // target threads. | |
3020 if (Thread::current() == thr && !thr->has_attached_via_jni()) { | |
3021 // we don't set the name of an attached thread to avoid stepping | |
3022 // on other programs | |
3023 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); | |
3024 os::set_native_thread_name(thread_name); | |
3025 } | |
3026 JVM_END | |
0 | 3027 |
3028 // java.lang.SecurityManager /////////////////////////////////////////////////////////////////////// | |
3029 | |
3030 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) { | |
3031 assert(jthread->is_Java_thread(), "must be a Java thread"); | |
3032 if (jthread->privileged_stack_top() == NULL) return false; | |
3033 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) { | |
3034 oop loader = jthread->privileged_stack_top()->class_loader(); | |
3035 if (loader == NULL) return true; | |
3036 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); | |
3037 if (trusted) return true; | |
3038 } | |
3039 return false; | |
3040 } | |
3041 | |
3042 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env)) | |
3043 JVMWrapper("JVM_CurrentLoadedClass"); | |
3044 ResourceMark rm(THREAD); | |
3045 | |
3046 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3047 // if a method in a class in a trusted loader is in a doPrivileged, return NULL | |
3048 bool trusted = is_trusted_frame(thread, &vfst); | |
3049 if (trusted) return NULL; | |
3050 | |
3051 methodOop m = vfst.method(); | |
3052 if (!m->is_native()) { | |
3053 klassOop holder = m->method_holder(); | |
3054 oop loader = instanceKlass::cast(holder)->class_loader(); | |
3055 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { | |
3056 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror()); | |
3057 } | |
3058 } | |
3059 } | |
3060 return NULL; | |
3061 JVM_END | |
3062 | |
3063 | |
3064 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env)) | |
3065 JVMWrapper("JVM_CurrentClassLoader"); | |
3066 ResourceMark rm(THREAD); | |
3067 | |
3068 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3069 | |
3070 // if a method in a class in a trusted loader is in a doPrivileged, return NULL | |
3071 bool trusted = is_trusted_frame(thread, &vfst); | |
3072 if (trusted) return NULL; | |
3073 | |
3074 methodOop m = vfst.method(); | |
3075 if (!m->is_native()) { | |
3076 klassOop holder = m->method_holder(); | |
3077 assert(holder->is_klass(), "just checking"); | |
3078 oop loader = instanceKlass::cast(holder)->class_loader(); | |
3079 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { | |
3080 return JNIHandles::make_local(env, loader); | |
3081 } | |
3082 } | |
3083 } | |
3084 return NULL; | |
3085 JVM_END | |
3086 | |
3087 | |
3088 // Utility object for collecting method holders walking down the stack | |
3089 class KlassLink: public ResourceObj { | |
3090 public: | |
3091 KlassHandle klass; | |
3092 KlassLink* next; | |
3093 | |
3094 KlassLink(KlassHandle k) { klass = k; next = NULL; } | |
3095 }; | |
3096 | |
3097 | |
3098 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env)) | |
3099 JVMWrapper("JVM_GetClassContext"); | |
3100 ResourceMark rm(THREAD); | |
3101 JvmtiVMObjectAllocEventCollector oam; | |
3102 // Collect linked list of (handles to) method holders | |
3103 KlassLink* first = NULL; | |
3104 KlassLink* last = NULL; | |
3105 int depth = 0; | |
3106 | |
3107 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) { | |
3108 // Native frames are not returned | |
3109 if (!vfst.method()->is_native()) { | |
3110 klassOop holder = vfst.method()->method_holder(); | |
3111 assert(holder->is_klass(), "just checking"); | |
3112 depth++; | |
3113 KlassLink* l = new KlassLink(KlassHandle(thread, holder)); | |
3114 if (first == NULL) { | |
3115 first = last = l; | |
3116 } else { | |
3117 last->next = l; | |
3118 last = l; | |
3119 } | |
3120 } | |
3121 } | |
3122 | |
3123 // Create result array of type [Ljava/lang/Class; | |
1142 | 3124 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL); |
0 | 3125 // Fill in mirrors corresponding to method holders |
3126 int index = 0; | |
3127 while (first != NULL) { | |
3128 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror()); | |
3129 first = first->next; | |
3130 } | |
3131 assert(index == depth, "just checking"); | |
3132 | |
3133 return (jobjectArray) JNIHandles::make_local(env, result); | |
3134 JVM_END | |
3135 | |
3136 | |
3137 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name)) | |
3138 JVMWrapper("JVM_ClassDepth"); | |
3139 ResourceMark rm(THREAD); | |
3140 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); | |
3141 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0); | |
3142 | |
3143 const char* str = java_lang_String::as_utf8_string(class_name_str()); | |
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3144 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str)); |
3582bf76420e
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diff
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|
3145 if (class_name_sym == NULL) { |
0 | 3146 return -1; |
3147 } | |
3148 | |
3149 int depth = 0; | |
3150 | |
3151 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3152 if (!vfst.method()->is_native()) { | |
3153 klassOop holder = vfst.method()->method_holder(); | |
3154 assert(holder->is_klass(), "just checking"); | |
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3155 if (instanceKlass::cast(holder)->name() == class_name_sym) { |
0 | 3156 return depth; |
3157 } | |
3158 depth++; | |
3159 } | |
3160 } | |
3161 return -1; | |
3162 JVM_END | |
3163 | |
3164 | |
3165 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env)) | |
3166 JVMWrapper("JVM_ClassLoaderDepth"); | |
3167 ResourceMark rm(THREAD); | |
3168 int depth = 0; | |
3169 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3170 // if a method in a class in a trusted loader is in a doPrivileged, return -1 | |
3171 bool trusted = is_trusted_frame(thread, &vfst); | |
3172 if (trusted) return -1; | |
3173 | |
3174 methodOop m = vfst.method(); | |
3175 if (!m->is_native()) { | |
3176 klassOop holder = m->method_holder(); | |
3177 assert(holder->is_klass(), "just checking"); | |
3178 oop loader = instanceKlass::cast(holder)->class_loader(); | |
3179 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { | |
3180 return depth; | |
3181 } | |
3182 depth++; | |
3183 } | |
3184 } | |
3185 return -1; | |
3186 JVM_END | |
3187 | |
3188 | |
3189 // java.lang.Package //////////////////////////////////////////////////////////////// | |
3190 | |
3191 | |
3192 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name)) | |
3193 JVMWrapper("JVM_GetSystemPackage"); | |
3194 ResourceMark rm(THREAD); | |
3195 JvmtiVMObjectAllocEventCollector oam; | |
3196 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); | |
3197 oop result = ClassLoader::get_system_package(str, CHECK_NULL); | |
3198 return (jstring) JNIHandles::make_local(result); | |
3199 JVM_END | |
3200 | |
3201 | |
3202 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env)) | |
3203 JVMWrapper("JVM_GetSystemPackages"); | |
3204 JvmtiVMObjectAllocEventCollector oam; | |
3205 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL); | |
3206 return (jobjectArray) JNIHandles::make_local(result); | |
3207 JVM_END | |
3208 | |
3209 | |
3210 // ObjectInputStream /////////////////////////////////////////////////////////////// | |
3211 | |
3212 bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) { | |
3213 if (current_class == NULL) { | |
3214 return true; | |
3215 } | |
3216 if ((current_class == field_class) || access.is_public()) { | |
3217 return true; | |
3218 } | |
3219 | |
3220 if (access.is_protected()) { | |
3221 // See if current_class is a subclass of field_class | |
3222 if (Klass::cast(current_class)->is_subclass_of(field_class)) { | |
3223 return true; | |
3224 } | |
3225 } | |
3226 | |
3227 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class)); | |
3228 } | |
3229 | |
3230 | |
3231 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4 | |
3232 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass)) | |
3233 JVMWrapper("JVM_AllocateNewObject"); | |
3234 JvmtiVMObjectAllocEventCollector oam; | |
3235 // Receiver is not used | |
3236 oop curr_mirror = JNIHandles::resolve_non_null(currClass); | |
3237 oop init_mirror = JNIHandles::resolve_non_null(initClass); | |
3238 | |
3239 // Cannot instantiate primitive types | |
3240 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) { | |
3241 ResourceMark rm(THREAD); | |
3242 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3243 } | |
3244 | |
3245 // Arrays not allowed here, must use JVM_AllocateNewArray | |
3246 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() || | |
3247 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) { | |
3248 ResourceMark rm(THREAD); | |
3249 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3250 } | |
3251 | |
3252 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror)); | |
3253 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror)); | |
3254 | |
3255 assert(curr_klass->is_subclass_of(init_klass()), "just checking"); | |
3256 | |
3257 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly. | |
3258 curr_klass->check_valid_for_instantiation(false, CHECK_NULL); | |
3259 | |
3260 // Make sure klass is initialized, since we are about to instantiate one of them. | |
3261 curr_klass->initialize(CHECK_NULL); | |
3262 | |
3263 methodHandle m (THREAD, | |
3264 init_klass->find_method(vmSymbols::object_initializer_name(), | |
3265 vmSymbols::void_method_signature())); | |
3266 if (m.is_null()) { | |
3267 ResourceMark rm(THREAD); | |
3268 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), | |
3269 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()), | |
3270 vmSymbols::object_initializer_name(), | |
3271 vmSymbols::void_method_signature())); | |
3272 } | |
3273 | |
3274 if (curr_klass == init_klass && !m->is_public()) { | |
3275 // Calling the constructor for class 'curr_klass'. | |
3276 // Only allow calls to a public no-arg constructor. | |
3277 // This path corresponds to creating an Externalizable object. | |
3278 THROW_0(vmSymbols::java_lang_IllegalAccessException()); | |
3279 } | |
3280 | |
3281 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) { | |
3282 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb' | |
3283 THROW_0(vmSymbols::java_lang_IllegalAccessException()); | |
3284 } | |
3285 | |
3286 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL); | |
3287 // Call constructor m. This might call a constructor higher up in the hierachy | |
3288 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL); | |
3289 | |
3290 return JNIHandles::make_local(obj()); | |
3291 JVM_END | |
3292 | |
3293 | |
3294 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length)) | |
3295 JVMWrapper("JVM_AllocateNewArray"); | |
3296 JvmtiVMObjectAllocEventCollector oam; | |
3297 oop mirror = JNIHandles::resolve_non_null(currClass); | |
3298 | |
3299 if (java_lang_Class::is_primitive(mirror)) { | |
3300 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3301 } | |
3302 klassOop k = java_lang_Class::as_klassOop(mirror); | |
3303 oop result; | |
3304 | |
3305 if (k->klass_part()->oop_is_typeArray()) { | |
3306 // typeArray | |
3307 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL); | |
3308 } else if (k->klass_part()->oop_is_objArray()) { | |
3309 // objArray | |
3310 objArrayKlassHandle oak(THREAD, k); | |
3311 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior) | |
3312 result = oak->allocate(length, CHECK_NULL); | |
3313 } else { | |
3314 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3315 } | |
3316 return JNIHandles::make_local(env, result); | |
3317 JVM_END | |
3318 | |
3319 | |
3320 // Return the first non-null class loader up the execution stack, or null | |
3321 // if only code from the null class loader is on the stack. | |
3322 | |
3323 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env)) | |
3324 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3325 // UseNewReflection | |
3326 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection | |
3327 klassOop holder = vfst.method()->method_holder(); | |
3328 oop loader = instanceKlass::cast(holder)->class_loader(); | |
3329 if (loader != NULL) { | |
3330 return JNIHandles::make_local(env, loader); | |
3331 } | |
3332 } | |
3333 return NULL; | |
3334 JVM_END | |
3335 | |
3336 | |
3337 // Load a class relative to the most recent class on the stack with a non-null | |
3338 // classloader. | |
3339 // This function has been deprecated and should not be considered part of the | |
3340 // specified JVM interface. | |
3341 | |
3342 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver, | |
3343 jclass currClass, jstring currClassName)) | |
3344 JVMWrapper("JVM_LoadClass0"); | |
3345 // Receiver is not used | |
3346 ResourceMark rm(THREAD); | |
3347 | |
3348 // Class name argument is not guaranteed to be in internal format | |
3349 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName)); | |
3350 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL); | |
3351 | |
3352 const char* str = java_lang_String::as_utf8_string(string()); | |
3353 | |
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3354 if (str == NULL || (int)strlen(str) > Symbol::max_length()) { |
0 | 3355 // It's impossible to create this class; the name cannot fit |
3356 // into the constant pool. | |
3357 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str); | |
3358 } | |
3359 | |
2177
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3360 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL); |
0 | 3361 Handle curr_klass (THREAD, JNIHandles::resolve(currClass)); |
3362 // Find the most recent class on the stack with a non-null classloader | |
3363 oop loader = NULL; | |
3364 oop protection_domain = NULL; | |
3365 if (curr_klass.is_null()) { | |
3366 for (vframeStream vfst(thread); | |
3367 !vfst.at_end() && loader == NULL; | |
3368 vfst.next()) { | |
3369 if (!vfst.method()->is_native()) { | |
3370 klassOop holder = vfst.method()->method_holder(); | |
3371 loader = instanceKlass::cast(holder)->class_loader(); | |
3372 protection_domain = instanceKlass::cast(holder)->protection_domain(); | |
3373 } | |
3374 } | |
3375 } else { | |
3376 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass()); | |
3377 loader = instanceKlass::cast(curr_klass_oop)->class_loader(); | |
3378 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain(); | |
3379 } | |
3380 Handle h_loader(THREAD, loader); | |
3381 Handle h_prot (THREAD, protection_domain); | |
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3382 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot, |
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3383 false, thread); |
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|
3384 if (TraceClassResolution && result != NULL) { |
715dceaa89b7
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|
3385 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); |
715dceaa89b7
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3386 } |
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3387 return result; |
0 | 3388 JVM_END |
3389 | |
3390 | |
3391 // Array /////////////////////////////////////////////////////////////////////////////////////////// | |
3392 | |
3393 | |
3394 // resolve array handle and check arguments | |
3395 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) { | |
3396 if (arr == NULL) { | |
3397 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
3398 } | |
3399 oop a = JNIHandles::resolve_non_null(arr); | |
3400 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) { | |
3401 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array"); | |
3402 } | |
3403 return arrayOop(a); | |
3404 } | |
3405 | |
3406 | |
3407 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr)) | |
3408 JVMWrapper("JVM_GetArrayLength"); | |
3409 arrayOop a = check_array(env, arr, false, CHECK_0); | |
3410 return a->length(); | |
3411 JVM_END | |
3412 | |
3413 | |
3414 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index)) | |
3415 JVMWrapper("JVM_Array_Get"); | |
3416 JvmtiVMObjectAllocEventCollector oam; | |
3417 arrayOop a = check_array(env, arr, false, CHECK_NULL); | |
3418 jvalue value; | |
3419 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL); | |
3420 oop box = Reflection::box(&value, type, CHECK_NULL); | |
3421 return JNIHandles::make_local(env, box); | |
3422 JVM_END | |
3423 | |
3424 | |
3425 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode)) | |
3426 JVMWrapper("JVM_GetPrimitiveArrayElement"); | |
3427 jvalue value; | |
3428 value.i = 0; // to initialize value before getting used in CHECK | |
3429 arrayOop a = check_array(env, arr, true, CHECK_(value)); | |
3430 assert(a->is_typeArray(), "just checking"); | |
3431 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value)); | |
3432 BasicType wide_type = (BasicType) wCode; | |
3433 if (type != wide_type) { | |
3434 Reflection::widen(&value, type, wide_type, CHECK_(value)); | |
3435 } | |
3436 return value; | |
3437 JVM_END | |
3438 | |
3439 | |
3440 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val)) | |
3441 JVMWrapper("JVM_SetArrayElement"); | |
3442 arrayOop a = check_array(env, arr, false, CHECK); | |
3443 oop box = JNIHandles::resolve(val); | |
3444 jvalue value; | |
3445 value.i = 0; // to initialize value before getting used in CHECK | |
3446 BasicType value_type; | |
3447 if (a->is_objArray()) { | |
3448 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array | |
3449 value_type = Reflection::unbox_for_regular_object(box, &value); | |
3450 } else { | |
3451 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); | |
3452 } | |
3453 Reflection::array_set(&value, a, index, value_type, CHECK); | |
3454 JVM_END | |
3455 | |
3456 | |
3457 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode)) | |
3458 JVMWrapper("JVM_SetPrimitiveArrayElement"); | |
3459 arrayOop a = check_array(env, arr, true, CHECK); | |
3460 assert(a->is_typeArray(), "just checking"); | |
3461 BasicType value_type = (BasicType) vCode; | |
3462 Reflection::array_set(&v, a, index, value_type, CHECK); | |
3463 JVM_END | |
3464 | |
3465 | |
3466 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length)) | |
3467 JVMWrapper("JVM_NewArray"); | |
3468 JvmtiVMObjectAllocEventCollector oam; | |
3469 oop element_mirror = JNIHandles::resolve(eltClass); | |
3470 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL); | |
3471 return JNIHandles::make_local(env, result); | |
3472 JVM_END | |
3473 | |
3474 | |
3475 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim)) | |
3476 JVMWrapper("JVM_NewMultiArray"); | |
3477 JvmtiVMObjectAllocEventCollector oam; | |
3478 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL); | |
3479 oop element_mirror = JNIHandles::resolve(eltClass); | |
3480 assert(dim_array->is_typeArray(), "just checking"); | |
3481 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL); | |
3482 return JNIHandles::make_local(env, result); | |
3483 JVM_END | |
3484 | |
3485 | |
3486 // Networking library support //////////////////////////////////////////////////////////////////// | |
3487 | |
3488 JVM_LEAF(jint, JVM_InitializeSocketLibrary()) | |
3489 JVMWrapper("JVM_InitializeSocketLibrary"); | |
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828eafbd85cc
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|
3490 return 0; |
0 | 3491 JVM_END |
3492 | |
3493 | |
3494 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol)) | |
3495 JVMWrapper("JVM_Socket"); | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
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diff
changeset
|
3496 return os::socket(domain, type, protocol); |
0 | 3497 JVM_END |
3498 | |
3499 | |
3500 JVM_LEAF(jint, JVM_SocketClose(jint fd)) | |
3501 JVMWrapper2("JVM_SocketClose (0x%x)", fd); | |
3502 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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diff
changeset
|
3503 return os::socket_close(fd); |
0 | 3504 JVM_END |
3505 | |
3506 | |
3507 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto)) | |
3508 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd); | |
3509 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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diff
changeset
|
3510 return os::socket_shutdown(fd, howto); |
0 | 3511 JVM_END |
3512 | |
3513 | |
3514 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags)) | |
3515 JVMWrapper2("JVM_Recv (0x%x)", fd); | |
3516 //%note jvm_r6 | |
4717
11c26bfcf8c7
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phh
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4006
diff
changeset
|
3517 return os::recv(fd, buf, (size_t)nBytes, (uint)flags); |
0 | 3518 JVM_END |
3519 | |
3520 | |
3521 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags)) | |
3522 JVMWrapper2("JVM_Send (0x%x)", fd); | |
3523 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
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diff
changeset
|
3524 return os::send(fd, buf, (size_t)nBytes, (uint)flags); |
0 | 3525 JVM_END |
3526 | |
3527 | |
3528 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout)) | |
3529 JVMWrapper2("JVM_Timeout (0x%x)", fd); | |
3530 //%note jvm_r6 | |
1980
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6348631: remove the use of the HPI library from Hotspot
ikrylov
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diff
changeset
|
3531 return os::timeout(fd, timeout); |
0 | 3532 JVM_END |
3533 | |
3534 | |
3535 JVM_LEAF(jint, JVM_Listen(jint fd, jint count)) | |
3536 JVMWrapper2("JVM_Listen (0x%x)", fd); | |
3537 //%note jvm_r6 | |
1980
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ikrylov
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diff
changeset
|
3538 return os::listen(fd, count); |
0 | 3539 JVM_END |
3540 | |
3541 | |
3542 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len)) | |
3543 JVMWrapper2("JVM_Connect (0x%x)", fd); | |
3544 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
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diff
changeset
|
3545 return os::connect(fd, him, (socklen_t)len); |
0 | 3546 JVM_END |
3547 | |
3548 | |
3549 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len)) | |
3550 JVMWrapper2("JVM_Bind (0x%x)", fd); | |
3551 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3552 return os::bind(fd, him, (socklen_t)len); |
0 | 3553 JVM_END |
3554 | |
3555 | |
3556 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len)) | |
3557 JVMWrapper2("JVM_Accept (0x%x)", fd); | |
3558 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3559 socklen_t socklen = (socklen_t)(*len); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3560 jint result = os::accept(fd, him, &socklen); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3561 *len = (jint)socklen; |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3562 return result; |
0 | 3563 JVM_END |
3564 | |
3565 | |
3566 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen)) | |
3567 JVMWrapper2("JVM_RecvFrom (0x%x)", fd); | |
3568 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3569 socklen_t socklen = (socklen_t)(*fromlen); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3570 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3571 *fromlen = (int)socklen; |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3572 return result; |
0 | 3573 JVM_END |
3574 | |
3575 | |
3576 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len)) | |
3577 JVMWrapper2("JVM_GetSockName (0x%x)", fd); | |
3578 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3579 socklen_t socklen = (socklen_t)(*len); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3580 jint result = os::get_sock_name(fd, him, &socklen); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3581 *len = (int)socklen; |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3582 return result; |
0 | 3583 JVM_END |
3584 | |
3585 | |
3586 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen)) | |
3587 JVMWrapper2("JVM_SendTo (0x%x)", fd); | |
3588 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3589 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen); |
0 | 3590 JVM_END |
3591 | |
3592 | |
3593 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes)) | |
3594 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd); | |
3595 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3596 return os::socket_available(fd, pbytes); |
0 | 3597 JVM_END |
3598 | |
3599 | |
3600 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen)) | |
3601 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); | |
3602 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3603 socklen_t socklen = (socklen_t)(*optlen); |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3604 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
|
3605 *optlen = (int)socklen; |
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3606 return result; |
0 | 3607 JVM_END |
3608 | |
3609 | |
3610 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen)) | |
3611 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); | |
3612 //%note jvm_r6 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3613 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen); |
0 | 3614 JVM_END |
3615 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3616 |
0 | 3617 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen)) |
3618 JVMWrapper("JVM_GetHostName"); | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3619 return os::get_host_name(name, namelen); |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3620 JVM_END |
0 | 3621 |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3622 |
0 | 3623 // Library support /////////////////////////////////////////////////////////////////////////// |
3624 | |
3625 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name)) | |
3626 //%note jvm_ct | |
3627 JVMWrapper2("JVM_LoadLibrary (%s)", name); | |
3628 char ebuf[1024]; | |
3629 void *load_result; | |
3630 { | |
3631 ThreadToNativeFromVM ttnfvm(thread); | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3632 load_result = os::dll_load(name, ebuf, sizeof ebuf); |
0 | 3633 } |
3634 if (load_result == NULL) { | |
3635 char msg[1024]; | |
3636 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf); | |
3637 // Since 'ebuf' may contain a string encoded using | |
3638 // platform encoding scheme, we need to pass | |
3639 // Exceptions::unsafe_to_utf8 to the new_exception method | |
3640 // as the last argument. See bug 6367357. | |
3641 Handle h_exception = | |
3642 Exceptions::new_exception(thread, | |
3643 vmSymbols::java_lang_UnsatisfiedLinkError(), | |
3644 msg, Exceptions::unsafe_to_utf8); | |
3645 | |
3646 THROW_HANDLE_0(h_exception); | |
3647 } | |
3648 return load_result; | |
3649 JVM_END | |
3650 | |
3651 | |
3652 JVM_LEAF(void, JVM_UnloadLibrary(void* handle)) | |
3653 JVMWrapper("JVM_UnloadLibrary"); | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3654 os::dll_unload(handle); |
0 | 3655 JVM_END |
3656 | |
3657 | |
3658 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name)) | |
3659 JVMWrapper2("JVM_FindLibraryEntry (%s)", name); | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3660 return os::dll_lookup(handle, name); |
0 | 3661 JVM_END |
3662 | |
4717
11c26bfcf8c7
7091417: recvfrom's 6th input should be of type socklen_t
phh
parents:
4006
diff
changeset
|
3663 |
0 | 3664 // Floating point support //////////////////////////////////////////////////////////////////// |
3665 | |
3666 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a)) | |
3667 JVMWrapper("JVM_IsNaN"); | |
3668 return g_isnan(a); | |
3669 JVM_END | |
3670 | |
3671 | |
3672 // JNI version /////////////////////////////////////////////////////////////////////////////// | |
3673 | |
3674 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version)) | |
3675 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version); | |
3676 return Threads::is_supported_jni_version_including_1_1(version); | |
3677 JVM_END | |
3678 | |
3679 | |
3680 // String support /////////////////////////////////////////////////////////////////////////// | |
3681 | |
3682 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str)) | |
3683 JVMWrapper("JVM_InternString"); | |
3684 JvmtiVMObjectAllocEventCollector oam; | |
3685 if (str == NULL) return NULL; | |
3686 oop string = JNIHandles::resolve_non_null(str); | |
3687 oop result = StringTable::intern(string, CHECK_NULL); | |
3688 return (jstring) JNIHandles::make_local(env, result); | |
3689 JVM_END | |
3690 | |
3691 | |
3692 // Raw monitor support ////////////////////////////////////////////////////////////////////// | |
3693 | |
3694 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock | |
3695 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because | |
3696 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check | |
3697 // that only works with java threads. | |
3698 | |
3699 | |
3700 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) { | |
3701 VM_Exit::block_if_vm_exited(); | |
3702 JVMWrapper("JVM_RawMonitorCreate"); | |
3703 return new Mutex(Mutex::native, "JVM_RawMonitorCreate"); | |
3704 } | |
3705 | |
3706 | |
3707 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) { | |
3708 VM_Exit::block_if_vm_exited(); | |
3709 JVMWrapper("JVM_RawMonitorDestroy"); | |
3710 delete ((Mutex*) mon); | |
3711 } | |
3712 | |
3713 | |
3714 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) { | |
3715 VM_Exit::block_if_vm_exited(); | |
3716 JVMWrapper("JVM_RawMonitorEnter"); | |
3717 ((Mutex*) mon)->jvm_raw_lock(); | |
3718 return 0; | |
3719 } | |
3720 | |
3721 | |
3722 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) { | |
3723 VM_Exit::block_if_vm_exited(); | |
3724 JVMWrapper("JVM_RawMonitorExit"); | |
3725 ((Mutex*) mon)->jvm_raw_unlock(); | |
3726 } | |
3727 | |
3728 | |
3729 // Support for Serialization | |
3730 | |
3731 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value); | |
3732 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value); | |
3733 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value); | |
3734 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value); | |
3735 | |
3736 static IntBitsToFloatFn int_bits_to_float_fn = NULL; | |
3737 static LongBitsToDoubleFn long_bits_to_double_fn = NULL; | |
3738 static FloatToIntBitsFn float_to_int_bits_fn = NULL; | |
3739 static DoubleToLongBitsFn double_to_long_bits_fn = NULL; | |
3740 | |
3741 | |
3742 void initialize_converter_functions() { | |
3743 if (JDK_Version::is_gte_jdk14x_version()) { | |
3744 // These functions only exist for compatibility with 1.3.1 and earlier | |
3745 return; | |
3746 } | |
3747 | |
3748 // called from universe_post_init() | |
3749 assert( | |
3750 int_bits_to_float_fn == NULL && | |
3751 long_bits_to_double_fn == NULL && | |
3752 float_to_int_bits_fn == NULL && | |
3753 double_to_long_bits_fn == NULL , | |
3754 "initialization done twice" | |
3755 ); | |
3756 // initialize | |
3757 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F")); | |
3758 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D")); | |
3759 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I")); | |
3760 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J")); | |
3761 // verify | |
3762 assert( | |
3763 int_bits_to_float_fn != NULL && | |
3764 long_bits_to_double_fn != NULL && | |
3765 float_to_int_bits_fn != NULL && | |
3766 double_to_long_bits_fn != NULL , | |
3767 "initialization failed" | |
3768 ); | |
3769 } | |
3770 | |
3771 | |
3772 // Serialization | |
3773 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, | |
3774 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) | |
3775 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); | |
3776 | |
3777 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); | |
3778 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); | |
3779 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); | |
3780 oop o = JNIHandles::resolve(obj); | |
3781 | |
3782 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { | |
3783 THROW(vmSymbols::java_lang_NullPointerException()); | |
3784 } | |
3785 | |
3786 jsize nfids = fids->length(); | |
3787 if (nfids == 0) return; | |
3788 | |
3789 if (tcodes->length() < nfids) { | |
3790 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); | |
3791 } | |
3792 | |
3793 jsize off = 0; | |
3794 /* loop through fields, setting values */ | |
3795 for (jsize i = 0; i < nfids; i++) { | |
3796 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); | |
3797 int field_offset; | |
3798 if (fid != NULL) { | |
3799 // NULL is a legal value for fid, but retrieving the field offset | |
3800 // trigger assertion in that case | |
3801 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); | |
3802 } | |
3803 | |
3804 switch (tcodes->char_at(i)) { | |
3805 case 'Z': | |
3806 if (fid != NULL) { | |
3807 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE; | |
3808 o->bool_field_put(field_offset, val); | |
3809 } | |
3810 off++; | |
3811 break; | |
3812 | |
3813 case 'B': | |
3814 if (fid != NULL) { | |
3815 o->byte_field_put(field_offset, dbuf->byte_at(off)); | |
3816 } | |
3817 off++; | |
3818 break; | |
3819 | |
3820 case 'C': | |
3821 if (fid != NULL) { | |
3822 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) | |
3823 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); | |
3824 o->char_field_put(field_offset, val); | |
3825 } | |
3826 off += 2; | |
3827 break; | |
3828 | |
3829 case 'S': | |
3830 if (fid != NULL) { | |
3831 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) | |
3832 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); | |
3833 o->short_field_put(field_offset, val); | |
3834 } | |
3835 off += 2; | |
3836 break; | |
3837 | |
3838 case 'I': | |
3839 if (fid != NULL) { | |
3840 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) | |
3841 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) | |
3842 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) | |
3843 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); | |
3844 o->int_field_put(field_offset, ival); | |
3845 } | |
3846 off += 4; | |
3847 break; | |
3848 | |
3849 case 'F': | |
3850 if (fid != NULL) { | |
3851 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) | |
3852 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) | |
3853 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) | |
3854 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); | |
3855 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival); | |
3856 o->float_field_put(field_offset, fval); | |
3857 } | |
3858 off += 4; | |
3859 break; | |
3860 | |
3861 case 'J': | |
3862 if (fid != NULL) { | |
3863 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) | |
3864 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) | |
3865 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) | |
3866 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) | |
3867 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) | |
3868 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) | |
3869 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) | |
3870 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); | |
3871 o->long_field_put(field_offset, lval); | |
3872 } | |
3873 off += 8; | |
3874 break; | |
3875 | |
3876 case 'D': | |
3877 if (fid != NULL) { | |
3878 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) | |
3879 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) | |
3880 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) | |
3881 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) | |
3882 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) | |
3883 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) | |
3884 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) | |
3885 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); | |
3886 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval); | |
3887 o->double_field_put(field_offset, dval); | |
3888 } | |
3889 off += 8; | |
3890 break; | |
3891 | |
3892 default: | |
3893 // Illegal typecode | |
3894 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); | |
3895 } | |
3896 } | |
3897 JVM_END | |
3898 | |
3899 | |
3900 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, | |
3901 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) | |
3902 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); | |
3903 | |
3904 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); | |
3905 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); | |
3906 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); | |
3907 oop o = JNIHandles::resolve(obj); | |
3908 | |
3909 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { | |
3910 THROW(vmSymbols::java_lang_NullPointerException()); | |
3911 } | |
3912 | |
3913 jsize nfids = fids->length(); | |
3914 if (nfids == 0) return; | |
3915 | |
3916 if (tcodes->length() < nfids) { | |
3917 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); | |
3918 } | |
3919 | |
3920 /* loop through fields, fetching values */ | |
3921 jsize off = 0; | |
3922 for (jsize i = 0; i < nfids; i++) { | |
3923 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); | |
3924 if (fid == NULL) { | |
3925 THROW(vmSymbols::java_lang_NullPointerException()); | |
3926 } | |
3927 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); | |
3928 | |
3929 switch (tcodes->char_at(i)) { | |
3930 case 'Z': | |
3931 { | |
3932 jboolean val = o->bool_field(field_offset); | |
3933 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0); | |
3934 } | |
3935 break; | |
3936 | |
3937 case 'B': | |
3938 dbuf->byte_at_put(off++, o->byte_field(field_offset)); | |
3939 break; | |
3940 | |
3941 case 'C': | |
3942 { | |
3943 jchar val = o->char_field(field_offset); | |
3944 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); | |
3945 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); | |
3946 } | |
3947 break; | |
3948 | |
3949 case 'S': | |
3950 { | |
3951 jshort val = o->short_field(field_offset); | |
3952 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); | |
3953 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); | |
3954 } | |
3955 break; | |
3956 | |
3957 case 'I': | |
3958 { | |
3959 jint val = o->int_field(field_offset); | |
3960 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); | |
3961 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); | |
3962 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); | |
3963 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); | |
3964 } | |
3965 break; | |
3966 | |
3967 case 'F': | |
3968 { | |
3969 jfloat fval = o->float_field(field_offset); | |
3970 jint ival = (*float_to_int_bits_fn)(env, NULL, fval); | |
3971 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF); | |
3972 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF); | |
3973 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF); | |
3974 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF); | |
3975 } | |
3976 break; | |
3977 | |
3978 case 'J': | |
3979 { | |
3980 jlong val = o->long_field(field_offset); | |
3981 dbuf->byte_at_put(off++, (val >> 56) & 0xFF); | |
3982 dbuf->byte_at_put(off++, (val >> 48) & 0xFF); | |
3983 dbuf->byte_at_put(off++, (val >> 40) & 0xFF); | |
3984 dbuf->byte_at_put(off++, (val >> 32) & 0xFF); | |
3985 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); | |
3986 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); | |
3987 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); | |
3988 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); | |
3989 } | |
3990 break; | |
3991 | |
3992 case 'D': | |
3993 { | |
3994 jdouble dval = o->double_field(field_offset); | |
3995 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval); | |
3996 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF); | |
3997 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF); | |
3998 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF); | |
3999 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF); | |
4000 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF); | |
4001 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF); | |
4002 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF); | |
4003 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF); | |
4004 } | |
4005 break; | |
4006 | |
4007 default: | |
4008 // Illegal typecode | |
4009 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); | |
4010 } | |
4011 } | |
4012 JVM_END | |
4013 | |
4014 | |
4015 // Shared JNI/JVM entry points ////////////////////////////////////////////////////////////// | |
4016 | |
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4017 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) { |
0 | 4018 // Security Note: |
4019 // The Java level wrapper will perform the necessary security check allowing | |
4020 // us to pass the NULL as the initiating class loader. | |
4021 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL); | |
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4022 |
0 | 4023 KlassHandle klass_handle(THREAD, klass); |
4024 // Check if we should initialize the class | |
4025 if (init && klass_handle->oop_is_instance()) { | |
4026 klass_handle->initialize(CHECK_NULL); | |
4027 } | |
4028 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror()); | |
4029 } | |
4030 | |
4031 | |
4032 // Internal SQE debugging support /////////////////////////////////////////////////////////// | |
4033 | |
4034 #ifndef PRODUCT | |
4035 | |
4036 extern "C" { | |
4037 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get); | |
4038 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get); | |
4039 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj); | |
4040 } | |
4041 | |
4042 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get)) | |
4043 JVMWrapper("JVM_AccessBoolVMFlag"); | |
4044 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL); | |
4045 JVM_END | |
4046 | |
4047 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get)) | |
4048 JVMWrapper("JVM_AccessVMIntFlag"); | |
4049 intx v; | |
4050 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL); | |
4051 *value = (jint)v; | |
4052 return result; | |
4053 JVM_END | |
4054 | |
4055 | |
4056 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj)) | |
4057 JVMWrapper("JVM_VMBreakPoint"); | |
4058 oop the_obj = JNIHandles::resolve(obj); | |
4059 BREAKPOINT; | |
4060 JVM_END | |
4061 | |
4062 | |
4063 #endif | |
4064 | |
4065 | |
4066 // Method /////////////////////////////////////////////////////////////////////////////////////////// | |
4067 | |
4068 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0)) | |
4069 JVMWrapper("JVM_InvokeMethod"); | |
4070 Handle method_handle; | |
4071 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) { | |
4072 method_handle = Handle(THREAD, JNIHandles::resolve(method)); | |
4073 Handle receiver(THREAD, JNIHandles::resolve(obj)); | |
4074 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); | |
4075 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL); | |
4076 jobject res = JNIHandles::make_local(env, result); | |
4077 if (JvmtiExport::should_post_vm_object_alloc()) { | |
4078 oop ret_type = java_lang_reflect_Method::return_type(method_handle()); | |
4079 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!"); | |
4080 if (java_lang_Class::is_primitive(ret_type)) { | |
4081 // Only for primitive type vm allocates memory for java object. | |
4082 // See box() method. | |
4083 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); | |
4084 } | |
4085 } | |
4086 return res; | |
4087 } else { | |
4088 THROW_0(vmSymbols::java_lang_StackOverflowError()); | |
4089 } | |
4090 JVM_END | |
4091 | |
4092 | |
4093 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0)) | |
4094 JVMWrapper("JVM_NewInstanceFromConstructor"); | |
4095 oop constructor_mirror = JNIHandles::resolve(c); | |
4096 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); | |
4097 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL); | |
4098 jobject res = JNIHandles::make_local(env, result); | |
4099 if (JvmtiExport::should_post_vm_object_alloc()) { | |
4100 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); | |
4101 } | |
4102 return res; | |
4103 JVM_END | |
4104 | |
4105 // Atomic /////////////////////////////////////////////////////////////////////////////////////////// | |
4106 | |
4107 JVM_LEAF(jboolean, JVM_SupportsCX8()) | |
4108 JVMWrapper("JVM_SupportsCX8"); | |
4109 return VM_Version::supports_cx8(); | |
4110 JVM_END | |
4111 | |
4112 | |
4113 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal)) | |
4114 JVMWrapper("JVM_CX8Field"); | |
4115 jlong res; | |
4116 oop o = JNIHandles::resolve(obj); | |
4117 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); | |
4118 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs); | |
4119 | |
4120 assert(VM_Version::supports_cx8(), "cx8 not supported"); | |
4121 res = Atomic::cmpxchg(newVal, addr, oldVal); | |
4122 | |
4123 return res == oldVal; | |
4124 JVM_END | |
4125 | |
116
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4126 // DTrace /////////////////////////////////////////////////////////////////// |
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4127 |
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4128 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env)) |
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4129 JVMWrapper("JVM_DTraceGetVersion"); |
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4130 return (jint)JVM_TRACING_DTRACE_VERSION; |
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4131 JVM_END |
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4132 |
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4133 JVM_ENTRY(jlong,JVM_DTraceActivate( |
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4134 JNIEnv* env, jint version, jstring module_name, jint providers_count, |
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4135 JVM_DTraceProvider* providers)) |
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4136 JVMWrapper("JVM_DTraceActivate"); |
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4137 return DTraceJSDT::activate( |
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4138 version, module_name, providers_count, providers, CHECK_0); |
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4139 JVM_END |
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4140 |
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4141 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method)) |
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4142 JVMWrapper("JVM_DTraceIsProbeEnabled"); |
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4143 return DTraceJSDT::is_probe_enabled(method); |
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4144 JVM_END |
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4145 |
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4146 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle)) |
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4147 JVMWrapper("JVM_DTraceDispose"); |
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4148 DTraceJSDT::dispose(handle); |
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4149 JVM_END |
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4150 |
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4151 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env)) |
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4152 JVMWrapper("JVM_DTraceIsSupported"); |
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4153 return DTraceJSDT::is_supported(); |
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4154 JVM_END |
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4155 |
0 | 4156 // Returns an array of all live Thread objects (VM internal JavaThreads, |
4157 // jvmti agent threads, and JNI attaching threads are skipped) | |
4158 // See CR 6404306 regarding JNI attaching threads | |
4159 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy)) | |
4160 ResourceMark rm(THREAD); | |
4161 ThreadsListEnumerator tle(THREAD, false, false); | |
4162 JvmtiVMObjectAllocEventCollector oam; | |
4163 | |
4164 int num_threads = tle.num_threads(); | |
1142 | 4165 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL); |
0 | 4166 objArrayHandle threads_ah(THREAD, r); |
4167 | |
4168 for (int i = 0; i < num_threads; i++) { | |
4169 Handle h = tle.get_threadObj(i); | |
4170 threads_ah->obj_at_put(i, h()); | |
4171 } | |
4172 | |
4173 return (jobjectArray) JNIHandles::make_local(env, threads_ah()); | |
4174 JVM_END | |
4175 | |
4176 | |
4177 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods | |
4178 // Return StackTraceElement[][], each element is the stack trace of a thread in | |
4179 // the corresponding entry in the given threads array | |
4180 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads)) | |
4181 JVMWrapper("JVM_DumpThreads"); | |
4182 JvmtiVMObjectAllocEventCollector oam; | |
4183 | |
4184 // Check if threads is null | |
4185 if (threads == NULL) { | |
4186 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
4187 } | |
4188 | |
4189 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads)); | |
4190 objArrayHandle ah(THREAD, a); | |
4191 int num_threads = ah->length(); | |
4192 // check if threads is non-empty array | |
4193 if (num_threads == 0) { | |
4194 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); | |
4195 } | |
4196 | |
4197 // check if threads is not an array of objects of Thread class | |
4198 klassOop k = objArrayKlass::cast(ah->klass())->element_klass(); | |
1142 | 4199 if (k != SystemDictionary::Thread_klass()) { |
0 | 4200 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); |
4201 } | |
4202 | |
4203 ResourceMark rm(THREAD); | |
4204 | |
4205 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); | |
4206 for (int i = 0; i < num_threads; i++) { | |
4207 oop thread_obj = ah->obj_at(i); | |
4208 instanceHandle h(THREAD, (instanceOop) thread_obj); | |
4209 thread_handle_array->append(h); | |
4210 } | |
4211 | |
4212 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL); | |
4213 return (jobjectArray)JNIHandles::make_local(env, stacktraces()); | |
4214 | |
4215 JVM_END | |
4216 | |
4217 // JVM monitoring and management support | |
4218 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version)) | |
4219 return Management::get_jmm_interface(version); | |
4220 JVM_END | |
4221 | |
4222 // com.sun.tools.attach.VirtualMachine agent properties support | |
4223 // | |
4224 // Initialize the agent properties with the properties maintained in the VM | |
4225 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties)) | |
4226 JVMWrapper("JVM_InitAgentProperties"); | |
4227 ResourceMark rm; | |
4228 | |
4229 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); | |
4230 | |
4231 PUTPROP(props, "sun.java.command", Arguments::java_command()); | |
4232 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags()); | |
4233 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args()); | |
4234 return properties; | |
4235 JVM_END | |
4236 | |
4237 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass)) | |
4238 { | |
4239 JVMWrapper("JVM_GetEnclosingMethodInfo"); | |
4240 JvmtiVMObjectAllocEventCollector oam; | |
4241 | |
4242 if (ofClass == NULL) { | |
4243 return NULL; | |
4244 } | |
4245 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass)); | |
4246 // Special handling for primitive objects | |
4247 if (java_lang_Class::is_primitive(mirror())) { | |
4248 return NULL; | |
4249 } | |
4250 klassOop k = java_lang_Class::as_klassOop(mirror()); | |
4251 if (!Klass::cast(k)->oop_is_instance()) { | |
4252 return NULL; | |
4253 } | |
4254 instanceKlassHandle ik_h(THREAD, k); | |
4255 int encl_method_class_idx = ik_h->enclosing_method_class_index(); | |
4256 if (encl_method_class_idx == 0) { | |
4257 return NULL; | |
4258 } | |
1142 | 4259 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL); |
0 | 4260 objArrayHandle dest(THREAD, dest_o); |
4261 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL); | |
4262 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror()); | |
4263 int encl_method_method_idx = ik_h->enclosing_method_method_index(); | |
4264 if (encl_method_method_idx != 0) { | |
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4265 Symbol* sym = ik_h->constants()->symbol_at( |
0 | 4266 extract_low_short_from_int( |
4267 ik_h->constants()->name_and_type_at(encl_method_method_idx))); | |
4268 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); | |
4269 dest->obj_at_put(1, str()); | |
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4270 sym = ik_h->constants()->symbol_at( |
0 | 4271 extract_high_short_from_int( |
4272 ik_h->constants()->name_and_type_at(encl_method_method_idx))); | |
4273 str = java_lang_String::create_from_symbol(sym, CHECK_NULL); | |
4274 dest->obj_at_put(2, str()); | |
4275 } | |
4276 return (jobjectArray) JNIHandles::make_local(dest()); | |
4277 } | |
4278 JVM_END | |
4279 | |
4280 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env, | |
4281 jint javaThreadState)) | |
4282 { | |
4283 // If new thread states are added in future JDK and VM versions, | |
4284 // this should check if the JDK version is compatible with thread | |
4285 // states supported by the VM. Return NULL if not compatible. | |
4286 // | |
4287 // This function must map the VM java_lang_Thread::ThreadStatus | |
4288 // to the Java thread state that the JDK supports. | |
4289 // | |
4290 | |
4291 typeArrayHandle values_h; | |
4292 switch (javaThreadState) { | |
4293 case JAVA_THREAD_STATE_NEW : { | |
4294 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4295 values_h = typeArrayHandle(THREAD, r); | |
4296 values_h->int_at_put(0, java_lang_Thread::NEW); | |
4297 break; | |
4298 } | |
4299 case JAVA_THREAD_STATE_RUNNABLE : { | |
4300 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4301 values_h = typeArrayHandle(THREAD, r); | |
4302 values_h->int_at_put(0, java_lang_Thread::RUNNABLE); | |
4303 break; | |
4304 } | |
4305 case JAVA_THREAD_STATE_BLOCKED : { | |
4306 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4307 values_h = typeArrayHandle(THREAD, r); | |
4308 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); | |
4309 break; | |
4310 } | |
4311 case JAVA_THREAD_STATE_WAITING : { | |
4312 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL); | |
4313 values_h = typeArrayHandle(THREAD, r); | |
4314 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT); | |
4315 values_h->int_at_put(1, java_lang_Thread::PARKED); | |
4316 break; | |
4317 } | |
4318 case JAVA_THREAD_STATE_TIMED_WAITING : { | |
4319 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL); | |
4320 values_h = typeArrayHandle(THREAD, r); | |
4321 values_h->int_at_put(0, java_lang_Thread::SLEEPING); | |
4322 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED); | |
4323 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED); | |
4324 break; | |
4325 } | |
4326 case JAVA_THREAD_STATE_TERMINATED : { | |
4327 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4328 values_h = typeArrayHandle(THREAD, r); | |
4329 values_h->int_at_put(0, java_lang_Thread::TERMINATED); | |
4330 break; | |
4331 } | |
4332 default: | |
4333 // Unknown state - probably incompatible JDK version | |
4334 return NULL; | |
4335 } | |
4336 | |
4337 return (jintArray) JNIHandles::make_local(env, values_h()); | |
4338 } | |
4339 JVM_END | |
4340 | |
4341 | |
4342 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env, | |
4343 jint javaThreadState, | |
4344 jintArray values)) | |
4345 { | |
4346 // If new thread states are added in future JDK and VM versions, | |
4347 // this should check if the JDK version is compatible with thread | |
4348 // states supported by the VM. Return NULL if not compatible. | |
4349 // | |
4350 // This function must map the VM java_lang_Thread::ThreadStatus | |
4351 // to the Java thread state that the JDK supports. | |
4352 // | |
4353 | |
4354 ResourceMark rm; | |
4355 | |
4356 // Check if threads is null | |
4357 if (values == NULL) { | |
4358 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
4359 } | |
4360 | |
4361 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values)); | |
4362 typeArrayHandle values_h(THREAD, v); | |
4363 | |
4364 objArrayHandle names_h; | |
4365 switch (javaThreadState) { | |
4366 case JAVA_THREAD_STATE_NEW : { | |
4367 assert(values_h->length() == 1 && | |
4368 values_h->int_at(0) == java_lang_Thread::NEW, | |
4369 "Invalid threadStatus value"); | |
4370 | |
1142 | 4371 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4372 1, /* only 1 substate */ |
4373 CHECK_NULL); | |
4374 names_h = objArrayHandle(THREAD, r); | |
4375 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL); | |
4376 names_h->obj_at_put(0, name()); | |
4377 break; | |
4378 } | |
4379 case JAVA_THREAD_STATE_RUNNABLE : { | |
4380 assert(values_h->length() == 1 && | |
4381 values_h->int_at(0) == java_lang_Thread::RUNNABLE, | |
4382 "Invalid threadStatus value"); | |
4383 | |
1142 | 4384 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4385 1, /* only 1 substate */ |
4386 CHECK_NULL); | |
4387 names_h = objArrayHandle(THREAD, r); | |
4388 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL); | |
4389 names_h->obj_at_put(0, name()); | |
4390 break; | |
4391 } | |
4392 case JAVA_THREAD_STATE_BLOCKED : { | |
4393 assert(values_h->length() == 1 && | |
4394 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER, | |
4395 "Invalid threadStatus value"); | |
4396 | |
1142 | 4397 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4398 1, /* only 1 substate */ |
4399 CHECK_NULL); | |
4400 names_h = objArrayHandle(THREAD, r); | |
4401 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL); | |
4402 names_h->obj_at_put(0, name()); | |
4403 break; | |
4404 } | |
4405 case JAVA_THREAD_STATE_WAITING : { | |
4406 assert(values_h->length() == 2 && | |
4407 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT && | |
4408 values_h->int_at(1) == java_lang_Thread::PARKED, | |
4409 "Invalid threadStatus value"); | |
1142 | 4410 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4411 2, /* number of substates */ |
4412 CHECK_NULL); | |
4413 names_h = objArrayHandle(THREAD, r); | |
4414 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT", | |
4415 CHECK_NULL); | |
4416 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED", | |
4417 CHECK_NULL); | |
4418 names_h->obj_at_put(0, name0()); | |
4419 names_h->obj_at_put(1, name1()); | |
4420 break; | |
4421 } | |
4422 case JAVA_THREAD_STATE_TIMED_WAITING : { | |
4423 assert(values_h->length() == 3 && | |
4424 values_h->int_at(0) == java_lang_Thread::SLEEPING && | |
4425 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED && | |
4426 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED, | |
4427 "Invalid threadStatus value"); | |
1142 | 4428 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4429 3, /* number of substates */ |
4430 CHECK_NULL); | |
4431 names_h = objArrayHandle(THREAD, r); | |
4432 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING", | |
4433 CHECK_NULL); | |
4434 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT", | |
4435 CHECK_NULL); | |
4436 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED", | |
4437 CHECK_NULL); | |
4438 names_h->obj_at_put(0, name0()); | |
4439 names_h->obj_at_put(1, name1()); | |
4440 names_h->obj_at_put(2, name2()); | |
4441 break; | |
4442 } | |
4443 case JAVA_THREAD_STATE_TERMINATED : { | |
4444 assert(values_h->length() == 1 && | |
4445 values_h->int_at(0) == java_lang_Thread::TERMINATED, | |
4446 "Invalid threadStatus value"); | |
1142 | 4447 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4448 1, /* only 1 substate */ |
4449 CHECK_NULL); | |
4450 names_h = objArrayHandle(THREAD, r); | |
4451 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL); | |
4452 names_h->obj_at_put(0, name()); | |
4453 break; | |
4454 } | |
4455 default: | |
4456 // Unknown state - probably incompatible JDK version | |
4457 return NULL; | |
4458 } | |
4459 return (jobjectArray) JNIHandles::make_local(env, names_h()); | |
4460 } | |
4461 JVM_END | |
4462 | |
4463 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size)) | |
4464 { | |
4465 memset(info, 0, sizeof(info_size)); | |
4466 | |
4467 info->jvm_version = Abstract_VM_Version::jvm_version(); | |
4468 info->update_version = 0; /* 0 in HotSpot Express VM */ | |
4469 info->special_update_version = 0; /* 0 in HotSpot Express VM */ | |
4470 | |
4471 // when we add a new capability in the jvm_version_info struct, we should also | |
4472 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat | |
4473 // counter defined in runtimeService.cpp. | |
4474 info->is_attachable = AttachListener::is_attach_supported(); | |
4475 #ifdef KERNEL | |
4476 info->is_kernel_jvm = 1; // true; | |
4477 #else // KERNEL | |
4478 info->is_kernel_jvm = 0; // false; | |
4479 #endif // KERNEL | |
4480 } | |
4481 JVM_END |