Mercurial > hg > truffle
annotate src/share/vm/prims/jni.cpp @ 3960:f08d439fab8c
7089790: integrate bsd-port changes
Reviewed-by: kvn, twisti, jrose
Contributed-by: Kurt Miller <kurt@intricatesoftware.com>, Greg Lewis <glewis@eyesbeyond.com>, Jung-uk Kim <jkim@freebsd.org>, Christos Zoulas <christos@zoulas.com>, Landon Fuller <landonf@plausible.coop>, The FreeBSD Foundation <board@freebsdfoundation.org>, Michael Franz <mvfranz@gmail.com>, Roger Hoover <rhoover@apple.com>, Alexander Strange <astrange@apple.com>
author | never |
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date | Sun, 25 Sep 2011 16:03:29 -0700 |
parents | e6b1331a51d2 |
children | 436b4a3231bf |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2011, 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/javaClasses.hpp" | |
28 #include "classfile/symbolTable.hpp" | |
29 #include "classfile/systemDictionary.hpp" | |
30 #include "classfile/vmSymbols.hpp" | |
31 #include "interpreter/linkResolver.hpp" | |
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32 #ifndef SERIALGC |
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33 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" |
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34 #endif // SERIALGC |
1972 | 35 #include "memory/allocation.inline.hpp" |
36 #include "memory/gcLocker.inline.hpp" | |
37 #include "memory/oopFactory.hpp" | |
38 #include "memory/universe.inline.hpp" | |
39 #include "oops/instanceKlass.hpp" | |
40 #include "oops/instanceOop.hpp" | |
41 #include "oops/markOop.hpp" | |
42 #include "oops/methodOop.hpp" | |
43 #include "oops/objArrayKlass.hpp" | |
44 #include "oops/objArrayOop.hpp" | |
45 #include "oops/oop.inline.hpp" | |
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46 #include "oops/symbol.hpp" |
1972 | 47 #include "oops/typeArrayKlass.hpp" |
48 #include "oops/typeArrayOop.hpp" | |
49 #include "prims/jni.h" | |
50 #include "prims/jniCheck.hpp" | |
51 #include "prims/jniFastGetField.hpp" | |
52 #include "prims/jvm.h" | |
53 #include "prims/jvm_misc.hpp" | |
54 #include "prims/jvmtiExport.hpp" | |
55 #include "prims/jvmtiThreadState.hpp" | |
56 #include "runtime/compilationPolicy.hpp" | |
57 #include "runtime/fieldDescriptor.hpp" | |
58 #include "runtime/fprofiler.hpp" | |
59 #include "runtime/handles.inline.hpp" | |
60 #include "runtime/interfaceSupport.hpp" | |
61 #include "runtime/java.hpp" | |
62 #include "runtime/javaCalls.hpp" | |
63 #include "runtime/jfieldIDWorkaround.hpp" | |
64 #include "runtime/reflection.hpp" | |
65 #include "runtime/sharedRuntime.hpp" | |
66 #include "runtime/signature.hpp" | |
67 #include "runtime/vm_operations.hpp" | |
68 #include "services/runtimeService.hpp" | |
69 #include "utilities/defaultStream.hpp" | |
70 #include "utilities/dtrace.hpp" | |
71 #include "utilities/events.hpp" | |
72 #include "utilities/histogram.hpp" | |
73 #ifdef TARGET_OS_FAMILY_linux | |
74 # include "os_linux.inline.hpp" | |
75 # include "thread_linux.inline.hpp" | |
76 #endif | |
77 #ifdef TARGET_OS_FAMILY_solaris | |
78 # include "os_solaris.inline.hpp" | |
79 # include "thread_solaris.inline.hpp" | |
80 #endif | |
81 #ifdef TARGET_OS_FAMILY_windows | |
82 # include "os_windows.inline.hpp" | |
83 # include "thread_windows.inline.hpp" | |
84 #endif | |
3960 | 85 #ifdef TARGET_OS_FAMILY_bsd |
86 # include "os_bsd.inline.hpp" | |
87 # include "thread_bsd.inline.hpp" | |
88 #endif | |
0 | 89 |
90 static jint CurrentVersion = JNI_VERSION_1_6; | |
91 | |
92 | |
93 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace | |
94 // '-return' probe regardless of the return path is taken out of the function. | |
95 // Methods that have multiple return paths use this to avoid having to | |
96 // instrument each return path. Methods that use CHECK or THROW must use this | |
97 // since those macros can cause an immedate uninstrumented return. | |
98 // | |
99 // In order to get the return value, a reference to the variable containing | |
100 // the return value must be passed to the contructor of the object, and | |
101 // the return value must be set before return (since the mark object has | |
102 // a reference to it). | |
103 // | |
104 // Example: | |
105 // DT_RETURN_MARK_DECL(SomeFunc, int); | |
106 // JNI_ENTRY(int, SomeFunc, ...) | |
107 // int return_value = 0; | |
108 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value); | |
109 // foo(CHECK_0) | |
110 // return_value = 5; | |
111 // return return_value; | |
112 // JNI_END | |
113 #define DT_RETURN_MARK_DECL(name, type) \ | |
114 HS_DTRACE_PROBE_DECL1(hotspot_jni, name##__return, type); \ | |
115 DTRACE_ONLY( \ | |
116 class DTraceReturnProbeMark_##name { \ | |
117 public: \ | |
118 const type& _ret_ref; \ | |
119 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \ | |
120 ~DTraceReturnProbeMark_##name() { \ | |
121 HS_DTRACE_PROBE1(hotspot_jni, name##__return, _ret_ref); \ | |
122 } \ | |
123 } \ | |
124 ) | |
125 // Void functions are simpler since there's no return value | |
126 #define DT_VOID_RETURN_MARK_DECL(name) \ | |
127 HS_DTRACE_PROBE_DECL0(hotspot_jni, name##__return); \ | |
128 DTRACE_ONLY( \ | |
129 class DTraceReturnProbeMark_##name { \ | |
130 public: \ | |
131 ~DTraceReturnProbeMark_##name() { \ | |
132 HS_DTRACE_PROBE0(hotspot_jni, name##__return); \ | |
133 } \ | |
134 } \ | |
135 ) | |
136 | |
137 | |
138 // Place these macros in the function to mark the return. Non-void | |
139 // functions need the type and address of the return value. | |
140 #define DT_RETURN_MARK(name, type, ref) \ | |
141 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) ) | |
142 #define DT_VOID_RETURN_MARK(name) \ | |
143 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark ) | |
144 | |
145 | |
146 // Use these to select distinct code for floating-point vs. non-floating point | |
147 // situations. Used from within common macros where we need slightly | |
148 // different behavior for Float/Double | |
149 #define FP_SELECT_Boolean(intcode, fpcode) intcode | |
150 #define FP_SELECT_Byte(intcode, fpcode) intcode | |
151 #define FP_SELECT_Char(intcode, fpcode) intcode | |
152 #define FP_SELECT_Short(intcode, fpcode) intcode | |
153 #define FP_SELECT_Object(intcode, fpcode) intcode | |
154 #define FP_SELECT_Int(intcode, fpcode) intcode | |
155 #define FP_SELECT_Long(intcode, fpcode) intcode | |
156 #define FP_SELECT_Float(intcode, fpcode) fpcode | |
157 #define FP_SELECT_Double(intcode, fpcode) fpcode | |
158 #define FP_SELECT(TypeName, intcode, fpcode) \ | |
159 FP_SELECT_##TypeName(intcode, fpcode) | |
160 | |
161 #define COMMA , | |
162 | |
163 // Choose DT_RETURN_MARK macros based on the type: float/double -> void | |
164 // (dtrace doesn't do FP yet) | |
165 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type) \ | |
166 FP_SELECT(TypeName, \ | |
167 DT_RETURN_MARK_DECL(name, type), DT_VOID_RETURN_MARK_DECL(name) ) | |
168 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \ | |
169 FP_SELECT(TypeName, \ | |
170 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) ) | |
171 | |
172 | |
173 // out-of-line helpers for class jfieldIDWorkaround: | |
174 | |
175 bool jfieldIDWorkaround::is_valid_jfieldID(klassOop k, jfieldID id) { | |
176 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) { | |
177 uintptr_t as_uint = (uintptr_t) id; | |
178 intptr_t offset = raw_instance_offset(id); | |
179 if (is_checked_jfieldID(id)) { | |
180 if (!klass_hash_ok(k, id)) { | |
181 return false; | |
182 } | |
183 } | |
184 return instanceKlass::cast(k)->contains_field_offset(offset); | |
185 } else { | |
186 JNIid* result = (JNIid*) id; | |
187 #ifdef ASSERT | |
188 return result != NULL && result->is_static_field_id(); | |
189 #else | |
190 return result != NULL; | |
191 #endif | |
192 } | |
193 } | |
194 | |
195 | |
196 intptr_t jfieldIDWorkaround::encode_klass_hash(klassOop k, intptr_t offset) { | |
197 if (offset <= small_offset_mask) { | |
198 klassOop field_klass = k; | |
199 klassOop super_klass = Klass::cast(field_klass)->super(); | |
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200 // With compressed oops the most super class with nonstatic fields would |
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201 // be the owner of fields embedded in the header. |
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202 while (instanceKlass::cast(super_klass)->has_nonstatic_fields() && |
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203 instanceKlass::cast(super_klass)->contains_field_offset(offset)) { |
0 | 204 field_klass = super_klass; // super contains the field also |
205 super_klass = Klass::cast(field_klass)->super(); | |
206 } | |
207 debug_only(No_Safepoint_Verifier nosafepoint;) | |
208 uintptr_t klass_hash = field_klass->identity_hash(); | |
209 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place; | |
210 } else { | |
211 #if 0 | |
212 #ifndef PRODUCT | |
213 { | |
214 ResourceMark rm; | |
215 warning("VerifyJNIFields: long offset %d in %s", offset, Klass::cast(k)->external_name()); | |
216 } | |
217 #endif | |
218 #endif | |
219 return 0; | |
220 } | |
221 } | |
222 | |
223 bool jfieldIDWorkaround::klass_hash_ok(klassOop k, jfieldID id) { | |
224 uintptr_t as_uint = (uintptr_t) id; | |
225 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask; | |
226 do { | |
227 debug_only(No_Safepoint_Verifier nosafepoint;) | |
228 // Could use a non-blocking query for identity_hash here... | |
229 if ((k->identity_hash() & klass_mask) == klass_hash) | |
230 return true; | |
231 k = Klass::cast(k)->super(); | |
232 } while (k != NULL); | |
233 return false; | |
234 } | |
235 | |
236 void jfieldIDWorkaround::verify_instance_jfieldID(klassOop k, jfieldID id) { | |
237 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" ); | |
238 uintptr_t as_uint = (uintptr_t) id; | |
239 intptr_t offset = raw_instance_offset(id); | |
240 if (VerifyJNIFields) { | |
241 if (is_checked_jfieldID(id)) { | |
242 guarantee(klass_hash_ok(k, id), | |
243 "Bug in native code: jfieldID class must match object"); | |
244 } else { | |
245 #if 0 | |
246 #ifndef PRODUCT | |
247 if (Verbose) { | |
248 ResourceMark rm; | |
249 warning("VerifyJNIFields: unverified offset %d for %s", offset, Klass::cast(k)->external_name()); | |
250 } | |
251 #endif | |
252 #endif | |
253 } | |
254 } | |
255 guarantee(instanceKlass::cast(k)->contains_field_offset(offset), | |
256 "Bug in native code: jfieldID offset must address interior of object"); | |
257 } | |
258 | |
259 // Pick a reasonable higher bound for local capacity requested | |
260 // for EnsureLocalCapacity and PushLocalFrame. We don't want it too | |
261 // high because a test (or very unusual application) may try to allocate | |
262 // that many handles and run out of swap space. An implementation is | |
263 // permitted to allocate more handles than the ensured capacity, so this | |
264 // value is set high enough to prevent compatibility problems. | |
265 const int MAX_REASONABLE_LOCAL_CAPACITY = 4*K; | |
266 | |
267 | |
268 // Wrapper to trace JNI functions | |
269 | |
270 #ifdef ASSERT | |
271 Histogram* JNIHistogram; | |
272 static volatile jint JNIHistogram_lock = 0; | |
273 | |
274 class JNITraceWrapper : public StackObj { | |
275 public: | |
276 JNITraceWrapper(const char* format, ...) { | |
277 if (TraceJNICalls) { | |
278 va_list ap; | |
279 va_start(ap, format); | |
280 tty->print("JNI "); | |
281 tty->vprint_cr(format, ap); | |
282 va_end(ap); | |
283 } | |
284 } | |
285 }; | |
286 | |
287 class JNIHistogramElement : public HistogramElement { | |
288 public: | |
289 JNIHistogramElement(const char* name); | |
290 }; | |
291 | |
292 JNIHistogramElement::JNIHistogramElement(const char* elementName) { | |
293 _name = elementName; | |
294 uintx count = 0; | |
295 | |
296 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) { | |
297 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) { | |
298 count +=1; | |
299 if ( (WarnOnStalledSpinLock > 0) | |
300 && (count % WarnOnStalledSpinLock == 0)) { | |
301 warning("JNIHistogram_lock seems to be stalled"); | |
302 } | |
303 } | |
304 } | |
305 | |
306 | |
307 if(JNIHistogram == NULL) | |
308 JNIHistogram = new Histogram("JNI Call Counts",100); | |
309 | |
310 JNIHistogram->add_element(this); | |
311 Atomic::dec(&JNIHistogram_lock); | |
312 } | |
313 | |
314 #define JNICountWrapper(arg) \ | |
315 static JNIHistogramElement* e = new JNIHistogramElement(arg); \ | |
316 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \ | |
317 if (e != NULL) e->increment_count() | |
318 #define JNIWrapper(arg) JNICountWrapper(arg); JNITraceWrapper(arg) | |
319 #else | |
320 #define JNIWrapper(arg) | |
321 #endif | |
322 | |
323 | |
324 // Implementation of JNI entries | |
325 | |
326 DT_RETURN_MARK_DECL(DefineClass, jclass); | |
327 | |
328 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef, | |
329 const jbyte *buf, jsize bufLen)) | |
330 JNIWrapper("DefineClass"); | |
331 | |
332 DTRACE_PROBE5(hotspot_jni, DefineClass__entry, | |
333 env, name, loaderRef, buf, bufLen); | |
334 jclass cls = NULL; | |
335 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls); | |
336 | |
337 // Since exceptions can be thrown, class initialization can take place | |
338 // if name is NULL no check for class name in .class stream has to be made. | |
339 if (name != NULL) { | |
340 const int str_len = (int)strlen(name); | |
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341 if (str_len > Symbol::max_length()) { |
0 | 342 // It's impossible to create this class; the name cannot fit |
343 // into the constant pool. | |
344 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
345 } | |
346 } | |
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347 TempNewSymbol class_name = SymbolTable::new_symbol(name, THREAD); |
0 | 348 |
349 ResourceMark rm(THREAD); | |
350 ClassFileStream st((u1*) buf, bufLen, NULL); | |
351 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef)); | |
352 | |
353 if (UsePerfData && !class_loader.is_null()) { | |
354 // check whether the current caller thread holds the lock or not. | |
355 // If not, increment the corresponding counter | |
356 if (ObjectSynchronizer:: | |
357 query_lock_ownership((JavaThread*)THREAD, class_loader) != | |
358 ObjectSynchronizer::owner_self) { | |
359 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc(); | |
360 } | |
361 } | |
362 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader, | |
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363 Handle(), &st, true, |
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364 CHECK_NULL); |
0 | 365 |
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366 if (TraceClassResolution && k != NULL) { |
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367 trace_class_resolution(k); |
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368 } |
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369 |
0 | 370 cls = (jclass)JNIHandles::make_local( |
371 env, Klass::cast(k)->java_mirror()); | |
372 return cls; | |
373 JNI_END | |
374 | |
375 | |
376 | |
377 static bool first_time_FindClass = true; | |
378 | |
379 DT_RETURN_MARK_DECL(FindClass, jclass); | |
380 | |
381 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) | |
382 JNIWrapper("FindClass"); | |
383 DTRACE_PROBE2(hotspot_jni, FindClass__entry, env, name); | |
384 | |
385 jclass result = NULL; | |
386 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); | |
387 | |
388 // Remember if we are the first invocation of jni_FindClass | |
389 bool first_time = first_time_FindClass; | |
390 first_time_FindClass = false; | |
391 | |
392 // Sanity check the name: it cannot be null or larger than the maximum size | |
393 // name we can fit in the constant pool. | |
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394 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { |
0 | 395 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); |
396 } | |
397 | |
398 //%note jni_3 | |
399 Handle loader; | |
400 Handle protection_domain; | |
401 // Find calling class | |
402 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0)); | |
403 if (k.not_null()) { | |
404 loader = Handle(THREAD, k->class_loader()); | |
405 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed | |
406 // in the correct class context. | |
407 if (loader.is_null() && | |
408 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) { | |
409 JavaValue result(T_OBJECT); | |
410 JavaCalls::call_static(&result, k, | |
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411 vmSymbols::getFromClass_name(), |
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412 vmSymbols::void_class_signature(), |
0 | 413 thread); |
414 if (HAS_PENDING_EXCEPTION) { | |
415 Handle ex(thread, thread->pending_exception()); | |
416 CLEAR_PENDING_EXCEPTION; | |
417 THROW_HANDLE_0(ex); | |
418 } | |
419 oop mirror = (oop) result.get_jobject(); | |
420 loader = Handle(THREAD, | |
421 instanceKlass::cast(java_lang_Class::as_klassOop(mirror))->class_loader()); | |
422 protection_domain = Handle(THREAD, | |
423 instanceKlass::cast(java_lang_Class::as_klassOop(mirror))->protection_domain()); | |
424 } | |
425 } else { | |
426 // We call ClassLoader.getSystemClassLoader to obtain the system class loader. | |
427 loader = Handle(THREAD, SystemDictionary::java_system_loader()); | |
428 } | |
429 | |
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430 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); |
0 | 431 result = find_class_from_class_loader(env, sym, true, loader, |
432 protection_domain, true, thread); | |
433 | |
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434 if (TraceClassResolution && result != NULL) { |
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435 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); |
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436 } |
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437 |
0 | 438 // If we were the first invocation of jni_FindClass, we enable compilation again |
439 // rather than just allowing invocation counter to overflow and decay. | |
440 // Controlled by flag DelayCompilationDuringStartup. | |
441 if (first_time && !CompileTheWorld) | |
442 CompilationPolicy::completed_vm_startup(); | |
443 | |
444 return result; | |
445 JNI_END | |
446 | |
447 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID); | |
448 | |
449 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) | |
450 JNIWrapper("FromReflectedMethod"); | |
451 DTRACE_PROBE2(hotspot_jni, FromReflectedMethod__entry, env, method); | |
452 jmethodID ret = NULL; | |
453 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); | |
454 | |
455 // method is a handle to a java.lang.reflect.Method object | |
456 oop reflected = JNIHandles::resolve_non_null(method); | |
457 oop mirror = NULL; | |
458 int slot = 0; | |
459 | |
1142 | 460 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { |
0 | 461 mirror = java_lang_reflect_Constructor::clazz(reflected); |
462 slot = java_lang_reflect_Constructor::slot(reflected); | |
463 } else { | |
1142 | 464 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type"); |
0 | 465 mirror = java_lang_reflect_Method::clazz(reflected); |
466 slot = java_lang_reflect_Method::slot(reflected); | |
467 } | |
468 klassOop k = java_lang_Class::as_klassOop(mirror); | |
469 | |
470 KlassHandle k1(THREAD, k); | |
471 // Make sure class is initialized before handing id's out to methods | |
472 Klass::cast(k1())->initialize(CHECK_NULL); | |
473 methodOop m = instanceKlass::cast(k1())->method_with_idnum(slot); | |
474 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted | |
475 return ret; | |
476 JNI_END | |
477 | |
478 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID); | |
479 | |
480 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) | |
481 JNIWrapper("FromReflectedField"); | |
482 DTRACE_PROBE2(hotspot_jni, FromReflectedField__entry, env, field); | |
483 jfieldID ret = NULL; | |
484 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); | |
485 | |
486 // field is a handle to a java.lang.reflect.Field object | |
487 oop reflected = JNIHandles::resolve_non_null(field); | |
488 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
489 klassOop k = java_lang_Class::as_klassOop(mirror); | |
490 int slot = java_lang_reflect_Field::slot(reflected); | |
491 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
492 | |
493 KlassHandle k1(THREAD, k); | |
494 // Make sure class is initialized before handing id's out to fields | |
495 Klass::cast(k1())->initialize(CHECK_NULL); | |
496 | |
497 // First check if this is a static field | |
498 if (modifiers & JVM_ACC_STATIC) { | |
3938 | 499 intptr_t offset = instanceKlass::cast(k1())->field_offset( slot ); |
0 | 500 JNIid* id = instanceKlass::cast(k1())->jni_id_for(offset); |
501 assert(id != NULL, "corrupt Field object"); | |
502 debug_only(id->set_is_static_field_id();) | |
503 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the klassOop | |
504 ret = jfieldIDWorkaround::to_static_jfieldID(id); | |
505 return ret; | |
506 } | |
507 | |
508 // The slot is the index of the field description in the field-array | |
509 // The jfieldID is the offset of the field within the object | |
510 // It may also have hash bits for k, if VerifyJNIFields is turned on. | |
3938 | 511 intptr_t offset = instanceKlass::cast(k1())->field_offset( slot ); |
0 | 512 assert(instanceKlass::cast(k1())->contains_field_offset(offset), "stay within object"); |
513 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset); | |
514 return ret; | |
515 JNI_END | |
516 | |
517 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject); | |
518 | |
519 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) | |
520 JNIWrapper("ToReflectedMethod"); | |
521 DTRACE_PROBE4(hotspot_jni, ToReflectedMethod__entry, env, cls, method_id, isStatic); | |
522 jobject ret = NULL; | |
523 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); | |
524 | |
525 methodHandle m (THREAD, JNIHandles::resolve_jmethod_id(method_id)); | |
526 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); | |
527 oop reflection_method; | |
528 if (m->is_initializer()) { | |
529 reflection_method = Reflection::new_constructor(m, CHECK_NULL); | |
530 } else { | |
531 reflection_method = Reflection::new_method(m, UseNewReflection, false, CHECK_NULL); | |
532 } | |
533 ret = JNIHandles::make_local(env, reflection_method); | |
534 return ret; | |
535 JNI_END | |
536 | |
537 DT_RETURN_MARK_DECL(GetSuperclass, jclass); | |
538 | |
539 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) | |
540 JNIWrapper("GetSuperclass"); | |
541 DTRACE_PROBE2(hotspot_jni, GetSuperclass__entry, env, sub); | |
542 jclass obj = NULL; | |
543 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); | |
544 | |
545 oop mirror = JNIHandles::resolve_non_null(sub); | |
546 // primitive classes return NULL | |
547 if (java_lang_Class::is_primitive(mirror)) return NULL; | |
548 | |
549 // Rules of Class.getSuperClass as implemented by KLass::java_super: | |
550 // arrays return Object | |
551 // interfaces return NULL | |
552 // proper classes return Klass::super() | |
553 klassOop k = java_lang_Class::as_klassOop(mirror); | |
554 if (Klass::cast(k)->is_interface()) return NULL; | |
555 | |
556 // return mirror for superclass | |
557 klassOop super = Klass::cast(k)->java_super(); | |
558 // super2 is the value computed by the compiler's getSuperClass intrinsic: | |
559 debug_only(klassOop super2 = ( Klass::cast(k)->oop_is_javaArray() | |
1142 | 560 ? SystemDictionary::Object_klass() |
0 | 561 : Klass::cast(k)->super() ) ); |
562 assert(super == super2, | |
563 "java_super computation depends on interface, array, other super"); | |
564 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(Klass::cast(super)->java_mirror()); | |
565 return obj; | |
566 JNI_END | |
567 | |
568 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) | |
569 JNIWrapper("IsSubclassOf"); | |
570 DTRACE_PROBE3(hotspot_jni, IsAssignableFrom__entry, env, sub, super); | |
571 oop sub_mirror = JNIHandles::resolve_non_null(sub); | |
572 oop super_mirror = JNIHandles::resolve_non_null(super); | |
573 if (java_lang_Class::is_primitive(sub_mirror) || | |
574 java_lang_Class::is_primitive(super_mirror)) { | |
575 jboolean ret = (sub_mirror == super_mirror); | |
576 DTRACE_PROBE1(hotspot_jni, IsAssignableFrom__return, ret); | |
577 return ret; | |
578 } | |
579 klassOop sub_klass = java_lang_Class::as_klassOop(sub_mirror); | |
580 klassOop super_klass = java_lang_Class::as_klassOop(super_mirror); | |
581 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); | |
582 jboolean ret = Klass::cast(sub_klass)->is_subtype_of(super_klass) ? | |
583 JNI_TRUE : JNI_FALSE; | |
584 DTRACE_PROBE1(hotspot_jni, IsAssignableFrom__return, ret); | |
585 return ret; | |
586 JNI_END | |
587 | |
588 DT_RETURN_MARK_DECL(Throw, jint); | |
589 | |
590 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) | |
591 JNIWrapper("Throw"); | |
592 DTRACE_PROBE2(hotspot_jni, Throw__entry, env, obj); | |
593 jint ret = JNI_OK; | |
594 DT_RETURN_MARK(Throw, jint, (const jint&)ret); | |
595 | |
596 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); | |
597 ShouldNotReachHere(); | |
598 JNI_END | |
599 | |
600 DT_RETURN_MARK_DECL(ThrowNew, jint); | |
601 | |
602 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) | |
603 JNIWrapper("ThrowNew"); | |
604 DTRACE_PROBE3(hotspot_jni, ThrowNew__entry, env, clazz, message); | |
605 jint ret = JNI_OK; | |
606 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); | |
607 | |
608 instanceKlass* k = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
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609 Symbol* name = k->name(); |
0 | 610 Handle class_loader (THREAD, k->class_loader()); |
611 Handle protection_domain (THREAD, k->protection_domain()); | |
612 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); | |
613 ShouldNotReachHere(); | |
614 JNI_END | |
615 | |
616 | |
617 // JNI functions only transform a pending async exception to a synchronous | |
618 // exception in ExceptionOccurred and ExceptionCheck calls, since | |
619 // delivering an async exception in other places won't change the native | |
620 // code's control flow and would be harmful when native code further calls | |
621 // JNI functions with a pending exception. Async exception is also checked | |
622 // during the call, so ExceptionOccurred/ExceptionCheck won't return | |
623 // false but deliver the async exception at the very end during | |
624 // state transition. | |
625 | |
626 static void jni_check_async_exceptions(JavaThread *thread) { | |
627 assert(thread == Thread::current(), "must be itself"); | |
628 thread->check_and_handle_async_exceptions(); | |
629 } | |
630 | |
631 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) | |
632 JNIWrapper("ExceptionOccurred"); | |
633 DTRACE_PROBE1(hotspot_jni, ExceptionOccurred__entry, env); | |
634 jni_check_async_exceptions(thread); | |
635 oop exception = thread->pending_exception(); | |
636 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception); | |
637 DTRACE_PROBE1(hotspot_jni, ExceptionOccurred__return, ret); | |
638 return ret; | |
639 JNI_END | |
640 | |
641 | |
642 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) | |
643 JNIWrapper("ExceptionDescribe"); | |
644 DTRACE_PROBE1(hotspot_jni, ExceptionDescribe__entry, env); | |
645 if (thread->has_pending_exception()) { | |
646 Handle ex(thread, thread->pending_exception()); | |
647 thread->clear_pending_exception(); | |
1142 | 648 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) { |
0 | 649 // Don't print anything if we are being killed. |
650 } else { | |
651 jio_fprintf(defaultStream::error_stream(), "Exception "); | |
652 if (thread != NULL && thread->threadObj() != NULL) { | |
653 ResourceMark rm(THREAD); | |
654 jio_fprintf(defaultStream::error_stream(), | |
655 "in thread \"%s\" ", thread->get_thread_name()); | |
656 } | |
1142 | 657 if (ex->is_a(SystemDictionary::Throwable_klass())) { |
0 | 658 JavaValue result(T_VOID); |
659 JavaCalls::call_virtual(&result, | |
660 ex, | |
661 KlassHandle(THREAD, | |
1142 | 662 SystemDictionary::Throwable_klass()), |
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663 vmSymbols::printStackTrace_name(), |
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664 vmSymbols::void_method_signature(), |
0 | 665 THREAD); |
666 // If an exception is thrown in the call it gets thrown away. Not much | |
667 // we can do with it. The native code that calls this, does not check | |
668 // for the exception - hence, it might still be in the thread when DestroyVM gets | |
669 // called, potentially causing a few asserts to trigger - since no pending exception | |
670 // is expected. | |
671 CLEAR_PENDING_EXCEPTION; | |
672 } else { | |
673 ResourceMark rm(THREAD); | |
674 jio_fprintf(defaultStream::error_stream(), | |
675 ". Uncaught exception of type %s.", | |
676 Klass::cast(ex->klass())->external_name()); | |
677 } | |
678 } | |
679 } | |
680 DTRACE_PROBE(hotspot_jni, ExceptionDescribe__return); | |
681 JNI_END | |
682 | |
683 | |
684 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env)) | |
685 JNIWrapper("ExceptionClear"); | |
686 DTRACE_PROBE1(hotspot_jni, ExceptionClear__entry, env); | |
687 | |
688 // The jni code might be using this API to clear java thrown exception. | |
689 // So just mark jvmti thread exception state as exception caught. | |
690 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); | |
691 if (state != NULL && state->is_exception_detected()) { | |
692 state->set_exception_caught(); | |
693 } | |
694 thread->clear_pending_exception(); | |
695 DTRACE_PROBE(hotspot_jni, ExceptionClear__return); | |
696 JNI_END | |
697 | |
698 | |
699 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) | |
700 JNIWrapper("FatalError"); | |
701 DTRACE_PROBE2(hotspot_jni, FatalError__entry, env, msg); | |
702 tty->print_cr("FATAL ERROR in native method: %s", msg); | |
703 thread->print_stack(); | |
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704 os::abort(); // Dump core and abort |
0 | 705 JNI_END |
706 | |
707 | |
708 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) | |
709 JNIWrapper("PushLocalFrame"); | |
710 DTRACE_PROBE2(hotspot_jni, PushLocalFrame__entry, env, capacity); | |
711 //%note jni_11 | |
712 if (capacity < 0 && capacity > MAX_REASONABLE_LOCAL_CAPACITY) { | |
713 DTRACE_PROBE1(hotspot_jni, PushLocalFrame__return, JNI_ERR); | |
714 return JNI_ERR; | |
715 } | |
716 JNIHandleBlock* old_handles = thread->active_handles(); | |
717 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); | |
718 assert(new_handles != NULL, "should not be NULL"); | |
719 new_handles->set_pop_frame_link(old_handles); | |
720 thread->set_active_handles(new_handles); | |
721 jint ret = JNI_OK; | |
722 DTRACE_PROBE1(hotspot_jni, PushLocalFrame__return, ret); | |
723 return ret; | |
724 JNI_END | |
725 | |
726 | |
727 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) | |
728 JNIWrapper("PopLocalFrame"); | |
729 DTRACE_PROBE2(hotspot_jni, PopLocalFrame__entry, env, result); | |
730 //%note jni_11 | |
731 Handle result_handle(thread, JNIHandles::resolve(result)); | |
732 JNIHandleBlock* old_handles = thread->active_handles(); | |
733 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); | |
734 if (new_handles != NULL) { | |
735 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. | |
736 // This way code will still work if PopLocalFrame is called without a corresponding | |
737 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise | |
738 // the release_block call will release the blocks. | |
739 thread->set_active_handles(new_handles); | |
740 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below | |
741 JNIHandleBlock::release_block(old_handles, thread); // may block | |
742 result = JNIHandles::make_local(thread, result_handle()); | |
743 } | |
744 DTRACE_PROBE1(hotspot_jni, PopLocalFrame__return, result); | |
745 return result; | |
746 JNI_END | |
747 | |
748 | |
749 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) | |
750 JNIWrapper("NewGlobalRef"); | |
751 DTRACE_PROBE2(hotspot_jni, NewGlobalRef__entry, env, ref); | |
752 Handle ref_handle(thread, JNIHandles::resolve(ref)); | |
753 jobject ret = JNIHandles::make_global(ref_handle); | |
754 DTRACE_PROBE1(hotspot_jni, NewGlobalRef__return, ret); | |
755 return ret; | |
756 JNI_END | |
757 | |
758 // Must be JNI_ENTRY (with HandleMark) | |
759 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) | |
760 JNIWrapper("DeleteGlobalRef"); | |
761 DTRACE_PROBE2(hotspot_jni, DeleteGlobalRef__entry, env, ref); | |
762 JNIHandles::destroy_global(ref); | |
763 DTRACE_PROBE(hotspot_jni, DeleteGlobalRef__return); | |
764 JNI_END | |
765 | |
766 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) | |
767 JNIWrapper("DeleteLocalRef"); | |
768 DTRACE_PROBE2(hotspot_jni, DeleteLocalRef__entry, env, obj); | |
769 JNIHandles::destroy_local(obj); | |
770 DTRACE_PROBE(hotspot_jni, DeleteLocalRef__return); | |
771 JNI_END | |
772 | |
773 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) | |
774 JNIWrapper("IsSameObject"); | |
775 DTRACE_PROBE3(hotspot_jni, IsSameObject__entry, env, r1, r2); | |
776 oop a = JNIHandles::resolve(r1); | |
777 oop b = JNIHandles::resolve(r2); | |
778 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE; | |
779 DTRACE_PROBE1(hotspot_jni, IsSameObject__return, ret); | |
780 return ret; | |
781 JNI_END | |
782 | |
783 | |
784 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) | |
785 JNIWrapper("NewLocalRef"); | |
786 DTRACE_PROBE2(hotspot_jni, NewLocalRef__entry, env, ref); | |
787 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref)); | |
788 DTRACE_PROBE1(hotspot_jni, NewLocalRef__return, ret); | |
789 return ret; | |
790 JNI_END | |
791 | |
792 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) | |
793 JNIWrapper("EnsureLocalCapacity"); | |
794 DTRACE_PROBE2(hotspot_jni, EnsureLocalCapacity__entry, env, capacity); | |
795 jint ret; | |
796 if (capacity >= 0 && capacity <= MAX_REASONABLE_LOCAL_CAPACITY) { | |
797 ret = JNI_OK; | |
798 } else { | |
799 ret = JNI_ERR; | |
800 } | |
801 DTRACE_PROBE1(hotspot_jni, EnsureLocalCapacity__return, ret); | |
802 return ret; | |
803 JNI_END | |
804 | |
805 // Return the Handle Type | |
806 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) | |
807 JNIWrapper("GetObjectRefType"); | |
808 DTRACE_PROBE2(hotspot_jni, GetObjectRefType__entry, env, obj); | |
809 jobjectRefType ret; | |
810 if (JNIHandles::is_local_handle(thread, obj) || | |
811 JNIHandles::is_frame_handle(thread, obj)) | |
812 ret = JNILocalRefType; | |
813 else if (JNIHandles::is_global_handle(obj)) | |
814 ret = JNIGlobalRefType; | |
815 else if (JNIHandles::is_weak_global_handle(obj)) | |
816 ret = JNIWeakGlobalRefType; | |
817 else | |
818 ret = JNIInvalidRefType; | |
819 DTRACE_PROBE1(hotspot_jni, GetObjectRefType__return, ret); | |
820 return ret; | |
821 JNI_END | |
822 | |
823 | |
824 class JNI_ArgumentPusher : public SignatureIterator { | |
825 protected: | |
826 JavaCallArguments* _arguments; | |
827 | |
828 virtual void get_bool () = 0; | |
829 virtual void get_char () = 0; | |
830 virtual void get_short () = 0; | |
831 virtual void get_byte () = 0; | |
832 virtual void get_int () = 0; | |
833 virtual void get_long () = 0; | |
834 virtual void get_float () = 0; | |
835 virtual void get_double () = 0; | |
836 virtual void get_object () = 0; | |
837 | |
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838 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) { |
0 | 839 this->_return_type = T_ILLEGAL; |
840 _arguments = NULL; | |
841 } | |
842 | |
843 public: | |
844 virtual void iterate( uint64_t fingerprint ) = 0; | |
845 | |
846 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; } | |
847 | |
848 inline void do_bool() { if (!is_return_type()) get_bool(); } | |
849 inline void do_char() { if (!is_return_type()) get_char(); } | |
850 inline void do_short() { if (!is_return_type()) get_short(); } | |
851 inline void do_byte() { if (!is_return_type()) get_byte(); } | |
852 inline void do_int() { if (!is_return_type()) get_int(); } | |
853 inline void do_long() { if (!is_return_type()) get_long(); } | |
854 inline void do_float() { if (!is_return_type()) get_float(); } | |
855 inline void do_double() { if (!is_return_type()) get_double(); } | |
856 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); } | |
857 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array | |
858 inline void do_void() { } | |
859 | |
860 JavaCallArguments* arguments() { return _arguments; } | |
861 void push_receiver(Handle h) { _arguments->push_oop(h); } | |
862 }; | |
863 | |
864 | |
865 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { | |
866 protected: | |
867 va_list _ap; | |
868 | |
869 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg | |
870 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg | |
871 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg | |
872 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg | |
873 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); } | |
874 | |
875 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests | |
876 | |
877 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); } | |
878 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg | |
879 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); } | |
880 inline void get_object() { jobject l = va_arg(_ap, jobject); | |
881 _arguments->push_oop(Handle((oop *)l, false)); } | |
882 | |
883 inline void set_ap(va_list rap) { | |
884 #ifdef va_copy | |
885 va_copy(_ap, rap); | |
886 #elif defined (__va_copy) | |
887 __va_copy(_ap, rap); | |
888 #else | |
889 _ap = rap; | |
890 #endif | |
891 } | |
892 | |
893 public: | |
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894 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap) |
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895 : JNI_ArgumentPusher(signature) { |
0 | 896 set_ap(rap); |
897 } | |
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898 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) |
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899 : JNI_ArgumentPusher(JNIHandles::resolve_jmethod_id(method_id)->signature()) { |
0 | 900 set_ap(rap); |
901 } | |
902 | |
903 // Optimized path if we have the bitvector form of signature | |
904 void iterate( uint64_t fingerprint ) { | |
905 if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate();// Must be too many arguments | |
906 else { | |
907 _return_type = (BasicType)((fingerprint >> static_feature_size) & | |
908 result_feature_mask); | |
909 | |
910 assert(fingerprint, "Fingerprint should not be 0"); | |
911 fingerprint = fingerprint >> (static_feature_size + result_feature_size); | |
912 while ( 1 ) { | |
913 switch ( fingerprint & parameter_feature_mask ) { | |
914 case bool_parm: | |
915 case char_parm: | |
916 case short_parm: | |
917 case byte_parm: | |
918 case int_parm: | |
919 get_int(); | |
920 break; | |
921 case obj_parm: | |
922 get_object(); | |
923 break; | |
924 case long_parm: | |
925 get_long(); | |
926 break; | |
927 case float_parm: | |
928 get_float(); | |
929 break; | |
930 case double_parm: | |
931 get_double(); | |
932 break; | |
933 case done_parm: | |
934 return; | |
935 break; | |
936 default: | |
937 ShouldNotReachHere(); | |
938 break; | |
939 } | |
940 fingerprint >>= parameter_feature_size; | |
941 } | |
942 } | |
943 } | |
944 }; | |
945 | |
946 | |
947 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { | |
948 protected: | |
949 const jvalue *_ap; | |
950 | |
951 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); } | |
952 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); } | |
953 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); } | |
954 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); } | |
955 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); } | |
956 | |
957 inline void get_long() { _arguments->push_long((_ap++)->j); } | |
958 inline void get_float() { _arguments->push_float((_ap++)->f); } | |
959 inline void get_double() { _arguments->push_double((_ap++)->d);} | |
960 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); } | |
961 | |
962 inline void set_ap(const jvalue *rap) { _ap = rap; } | |
963 | |
964 public: | |
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965 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap) |
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966 : JNI_ArgumentPusher(signature) { |
0 | 967 set_ap(rap); |
968 } | |
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969 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) |
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970 : JNI_ArgumentPusher(JNIHandles::resolve_jmethod_id(method_id)->signature()) { |
0 | 971 set_ap(rap); |
972 } | |
973 | |
974 // Optimized path if we have the bitvector form of signature | |
975 void iterate( uint64_t fingerprint ) { | |
976 if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate(); // Must be too many arguments | |
977 else { | |
978 _return_type = (BasicType)((fingerprint >> static_feature_size) & | |
979 result_feature_mask); | |
980 assert(fingerprint, "Fingerprint should not be 0"); | |
981 fingerprint = fingerprint >> (static_feature_size + result_feature_size); | |
982 while ( 1 ) { | |
983 switch ( fingerprint & parameter_feature_mask ) { | |
984 case bool_parm: | |
985 get_bool(); | |
986 break; | |
987 case char_parm: | |
988 get_char(); | |
989 break; | |
990 case short_parm: | |
991 get_short(); | |
992 break; | |
993 case byte_parm: | |
994 get_byte(); | |
995 break; | |
996 case int_parm: | |
997 get_int(); | |
998 break; | |
999 case obj_parm: | |
1000 get_object(); | |
1001 break; | |
1002 case long_parm: | |
1003 get_long(); | |
1004 break; | |
1005 case float_parm: | |
1006 get_float(); | |
1007 break; | |
1008 case double_parm: | |
1009 get_double(); | |
1010 break; | |
1011 case done_parm: | |
1012 return; | |
1013 break; | |
1014 default: | |
1015 ShouldNotReachHere(); | |
1016 break; | |
1017 } | |
1018 fingerprint >>= parameter_feature_size; | |
1019 } | |
1020 } | |
1021 } | |
1022 }; | |
1023 | |
1024 | |
1025 enum JNICallType { | |
1026 JNI_STATIC, | |
1027 JNI_VIRTUAL, | |
1028 JNI_NONVIRTUAL | |
1029 }; | |
1030 | |
1031 static methodHandle jni_resolve_interface_call(Handle recv, methodHandle method, TRAPS) { | |
1032 assert(!method.is_null() , "method should not be null"); | |
1033 | |
1034 KlassHandle recv_klass; // Default to NULL (use of ?: can confuse gcc) | |
1035 if (recv.not_null()) recv_klass = KlassHandle(THREAD, recv->klass()); | |
1036 KlassHandle spec_klass (THREAD, method->method_holder()); | |
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1037 Symbol* name = method->name(); |
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1038 Symbol* signature = method->signature(); |
0 | 1039 CallInfo info; |
1040 LinkResolver::resolve_interface_call(info, recv, recv_klass, spec_klass, name, signature, KlassHandle(), false, true, CHECK_(methodHandle())); | |
1041 return info.selected_method(); | |
1042 } | |
1043 | |
1044 static methodHandle jni_resolve_virtual_call(Handle recv, methodHandle method, TRAPS) { | |
1045 assert(!method.is_null() , "method should not be null"); | |
1046 | |
1047 KlassHandle recv_klass; // Default to NULL (use of ?: can confuse gcc) | |
1048 if (recv.not_null()) recv_klass = KlassHandle(THREAD, recv->klass()); | |
1049 KlassHandle spec_klass (THREAD, method->method_holder()); | |
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1050 Symbol* name = method->name(); |
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1051 Symbol* signature = method->signature(); |
0 | 1052 CallInfo info; |
1053 LinkResolver::resolve_virtual_call(info, recv, recv_klass, spec_klass, name, signature, KlassHandle(), false, true, CHECK_(methodHandle())); | |
1054 return info.selected_method(); | |
1055 } | |
1056 | |
1057 | |
1058 | |
1059 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { | |
1060 methodHandle method(THREAD, JNIHandles::resolve_jmethod_id(method_id)); | |
1061 | |
1062 // Create object to hold arguments for the JavaCall, and associate it with | |
1063 // the jni parser | |
1064 ResourceMark rm(THREAD); | |
1065 int number_of_parameters = method->size_of_parameters(); | |
1066 JavaCallArguments java_args(number_of_parameters); | |
1067 args->set_java_argument_object(&java_args); | |
1068 | |
1069 assert(method->is_static(), "method should be static"); | |
1070 | |
1071 // Fill out JavaCallArguments object | |
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1072 args->iterate( Fingerprinter(method).fingerprint() ); |
0 | 1073 // Initialize result type |
1074 result->set_type(args->get_ret_type()); | |
1075 | |
1076 // Invoke the method. Result is returned as oop. | |
1077 JavaCalls::call(result, method, &java_args, CHECK); | |
1078 | |
1079 // Convert result | |
1080 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { | |
1081 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); | |
1082 } | |
1083 } | |
1084 | |
1085 | |
1086 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { | |
1087 oop recv = JNIHandles::resolve(receiver); | |
1088 if (recv == NULL) { | |
1089 THROW(vmSymbols::java_lang_NullPointerException()); | |
1090 } | |
1091 Handle h_recv(THREAD, recv); | |
1092 | |
1093 int number_of_parameters; | |
1094 methodOop selected_method; | |
1095 { | |
1096 methodOop m = JNIHandles::resolve_jmethod_id(method_id); | |
1097 number_of_parameters = m->size_of_parameters(); | |
1098 klassOop holder = m->method_holder(); | |
1099 if (!(Klass::cast(holder))->is_interface()) { | |
1100 // non-interface call -- for that little speed boost, don't handlize | |
1101 debug_only(No_Safepoint_Verifier nosafepoint;) | |
1102 if (call_type == JNI_VIRTUAL) { | |
1103 // jni_GetMethodID makes sure class is linked and initialized | |
1104 // so m should have a valid vtable index. | |
1105 int vtbl_index = m->vtable_index(); | |
1106 if (vtbl_index != methodOopDesc::nonvirtual_vtable_index) { | |
1107 klassOop k = h_recv->klass(); | |
1108 // k might be an arrayKlassOop but all vtables start at | |
1109 // the same place. The cast is to avoid virtual call and assertion. | |
1110 instanceKlass *ik = (instanceKlass*)k->klass_part(); | |
1111 selected_method = ik->method_at_vtable(vtbl_index); | |
1112 } else { | |
1113 // final method | |
1114 selected_method = m; | |
1115 } | |
1116 } else { | |
1117 // JNI_NONVIRTUAL call | |
1118 selected_method = m; | |
1119 } | |
1120 } else { | |
1121 // interface call | |
1122 KlassHandle h_holder(THREAD, holder); | |
1123 | |
1124 int itbl_index = m->cached_itable_index(); | |
1125 if (itbl_index == -1) { | |
1126 itbl_index = klassItable::compute_itable_index(m); | |
1127 m->set_cached_itable_index(itbl_index); | |
1128 // the above may have grabbed a lock, 'm' and anything non-handlized can't be used again | |
1129 } | |
1130 klassOop k = h_recv->klass(); | |
1131 selected_method = instanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK); | |
1132 } | |
1133 } | |
1134 | |
1135 methodHandle method(THREAD, selected_method); | |
1136 | |
1137 // Create object to hold arguments for the JavaCall, and associate it with | |
1138 // the jni parser | |
1139 ResourceMark rm(THREAD); | |
1140 JavaCallArguments java_args(number_of_parameters); | |
1141 args->set_java_argument_object(&java_args); | |
1142 | |
1143 // handle arguments | |
1144 assert(!method->is_static(), "method should not be static"); | |
1145 args->push_receiver(h_recv); // Push jobject handle | |
1146 | |
1147 // Fill out JavaCallArguments object | |
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1148 args->iterate( Fingerprinter(method).fingerprint() ); |
0 | 1149 // Initialize result type |
1150 result->set_type(args->get_ret_type()); | |
1151 | |
1152 // Invoke the method. Result is returned as oop. | |
1153 JavaCalls::call(result, method, &java_args, CHECK); | |
1154 | |
1155 // Convert result | |
1156 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { | |
1157 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); | |
1158 } | |
1159 } | |
1160 | |
1161 | |
1162 static instanceOop alloc_object(jclass clazz, TRAPS) { | |
1163 KlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
1164 Klass::cast(k())->check_valid_for_instantiation(false, CHECK_NULL); | |
1165 instanceKlass::cast(k())->initialize(CHECK_NULL); | |
1166 instanceOop ih = instanceKlass::cast(k())->allocate_instance(THREAD); | |
1167 return ih; | |
1168 } | |
1169 | |
1170 DT_RETURN_MARK_DECL(AllocObject, jobject); | |
1171 | |
1172 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) | |
1173 JNIWrapper("AllocObject"); | |
1174 | |
1175 DTRACE_PROBE2(hotspot_jni, AllocObject__entry, env, clazz); | |
1176 jobject ret = NULL; | |
1177 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); | |
1178 | |
1179 instanceOop i = alloc_object(clazz, CHECK_NULL); | |
1180 ret = JNIHandles::make_local(env, i); | |
1181 return ret; | |
1182 JNI_END | |
1183 | |
1184 DT_RETURN_MARK_DECL(NewObjectA, jobject); | |
1185 | |
1186 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) | |
1187 JNIWrapper("NewObjectA"); | |
1188 DTRACE_PROBE3(hotspot_jni, NewObjectA__entry, env, clazz, methodID); | |
1189 jobject obj = NULL; | |
1190 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); | |
1191 | |
1192 instanceOop i = alloc_object(clazz, CHECK_NULL); | |
1193 obj = JNIHandles::make_local(env, i); | |
1194 JavaValue jvalue(T_VOID); | |
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1195 JNI_ArgumentPusherArray ap(methodID, args); |
0 | 1196 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); |
1197 return obj; | |
1198 JNI_END | |
1199 | |
1200 DT_RETURN_MARK_DECL(NewObjectV, jobject); | |
1201 | |
1202 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) | |
1203 JNIWrapper("NewObjectV"); | |
1204 DTRACE_PROBE3(hotspot_jni, NewObjectV__entry, env, clazz, methodID); | |
1205 jobject obj = NULL; | |
1206 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); | |
1207 | |
1208 instanceOop i = alloc_object(clazz, CHECK_NULL); | |
1209 obj = JNIHandles::make_local(env, i); | |
1210 JavaValue jvalue(T_VOID); | |
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1211 JNI_ArgumentPusherVaArg ap(methodID, args); |
0 | 1212 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); |
1213 return obj; | |
1214 JNI_END | |
1215 | |
1216 DT_RETURN_MARK_DECL(NewObject, jobject); | |
1217 | |
1218 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) | |
1219 JNIWrapper("NewObject"); | |
1220 DTRACE_PROBE3(hotspot_jni, NewObject__entry, env, clazz, methodID); | |
1221 jobject obj = NULL; | |
1222 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); | |
1223 | |
1224 instanceOop i = alloc_object(clazz, CHECK_NULL); | |
1225 obj = JNIHandles::make_local(env, i); | |
1226 va_list args; | |
1227 va_start(args, methodID); | |
1228 JavaValue jvalue(T_VOID); | |
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1229 JNI_ArgumentPusherVaArg ap(methodID, args); |
0 | 1230 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); |
1231 va_end(args); | |
1232 return obj; | |
1233 JNI_END | |
1234 | |
1235 | |
1236 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) | |
1237 JNIWrapper("GetObjectClass"); | |
1238 DTRACE_PROBE2(hotspot_jni, GetObjectClass__entry, env, obj); | |
1239 klassOop k = JNIHandles::resolve_non_null(obj)->klass(); | |
1240 jclass ret = | |
1241 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); | |
1242 DTRACE_PROBE1(hotspot_jni, GetObjectClass__return, ret); | |
1243 return ret; | |
1244 JNI_END | |
1245 | |
1246 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) | |
1247 JNIWrapper("IsInstanceOf"); | |
1248 DTRACE_PROBE3(hotspot_jni, IsInstanceOf__entry, env, obj, clazz); | |
1249 jboolean ret = JNI_TRUE; | |
1250 if (obj != NULL) { | |
1251 ret = JNI_FALSE; | |
1252 klassOop k = java_lang_Class::as_klassOop( | |
1253 JNIHandles::resolve_non_null(clazz)); | |
1254 if (k != NULL) { | |
1255 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; | |
1256 } | |
1257 } | |
1258 DTRACE_PROBE1(hotspot_jni, IsInstanceOf__return, ret); | |
1259 return ret; | |
1260 JNI_END | |
1261 | |
1262 | |
1263 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, | |
1264 const char *sig, bool is_static, TRAPS) { | |
1265 // %%%% This code should probably just call into a method in the LinkResolver | |
1266 // | |
1267 // The class should have been loaded (we have an instance of the class | |
1268 // passed in) so the method and signature should already be in the symbol | |
1269 // table. If they're not there, the method doesn't exist. | |
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1270 const char *name_to_probe = (name_str == NULL) |
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1271 ? vmSymbols::object_initializer_name()->as_C_string() |
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1272 : name_str; |
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1273 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); |
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1274 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); |
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1275 |
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1276 if (name == NULL || signature == NULL) { |
0 | 1277 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); |
1278 } | |
1279 | |
1280 // Throw a NoSuchMethodError exception if we have an instance of a | |
1281 // primitive java.lang.Class | |
1282 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { | |
1283 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); | |
1284 } | |
1285 | |
1286 KlassHandle klass(THREAD, | |
1287 java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
1288 | |
1289 // Make sure class is linked and initialized before handing id's out to | |
1290 // methodOops. | |
1291 Klass::cast(klass())->initialize(CHECK_NULL); | |
1292 | |
1293 methodOop m; | |
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1294 if (name == vmSymbols::object_initializer_name() || |
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1295 name == vmSymbols::class_initializer_name()) { |
0 | 1296 // Never search superclasses for constructors |
1297 if (klass->oop_is_instance()) { | |
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1298 m = instanceKlass::cast(klass())->find_method(name, signature); |
0 | 1299 } else { |
1300 m = NULL; | |
1301 } | |
1302 } else { | |
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1303 m = klass->lookup_method(name, signature); |
0 | 1304 // Look up interfaces |
1305 if (m == NULL && klass->oop_is_instance()) { | |
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1306 m = instanceKlass::cast(klass())->lookup_method_in_all_interfaces(name, |
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1307 signature); |
0 | 1308 } |
1309 } | |
1310 if (m == NULL || (m->is_static() != is_static)) { | |
1311 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); | |
1312 } | |
1313 return m->jmethod_id(); | |
1314 } | |
1315 | |
1316 | |
1317 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, | |
1318 const char *name, const char *sig)) | |
1319 JNIWrapper("GetMethodID"); | |
1320 DTRACE_PROBE4(hotspot_jni, GetMethodID__entry, env, clazz, name, sig); | |
1321 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); | |
1322 DTRACE_PROBE1(hotspot_jni, GetMethodID__return, ret); | |
1323 return ret; | |
1324 JNI_END | |
1325 | |
1326 | |
1327 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, | |
1328 const char *name, const char *sig)) | |
1329 JNIWrapper("GetStaticMethodID"); | |
1330 DTRACE_PROBE4(hotspot_jni, GetStaticMethodID__entry, env, clazz, name, sig); | |
1331 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); | |
1332 DTRACE_PROBE1(hotspot_jni, GetStaticMethodID__return, ret); | |
1333 return ret; | |
1334 JNI_END | |
1335 | |
1336 | |
1337 | |
1338 // | |
1339 // Calling Methods | |
1340 // | |
1341 | |
1342 | |
1343 #define DEFINE_CALLMETHOD(ResultType, Result, Tag) \ | |
1344 \ | |
1345 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType);\ | |
1346 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType);\ | |
1347 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType);\ | |
1348 \ | |
1349 JNI_ENTRY(ResultType, \ | |
1350 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ | |
1351 JNIWrapper("Call" XSTR(Result) "Method"); \ | |
1352 \ | |
1353 DTRACE_PROBE3(hotspot_jni, Call##Result##Method__entry, env, obj, methodID);\ | |
1354 ResultType ret = 0;\ | |
1355 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ | |
1356 (const ResultType&)ret);\ | |
1357 \ | |
1358 va_list args; \ | |
1359 va_start(args, methodID); \ | |
1360 JavaValue jvalue(Tag); \ | |
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1361 JNI_ArgumentPusherVaArg ap(methodID, args); \ |
0 | 1362 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ |
1363 va_end(args); \ | |
1364 ret = jvalue.get_##ResultType(); \ | |
1365 return ret;\ | |
1366 JNI_END \ | |
1367 \ | |
1368 \ | |
1369 JNI_ENTRY(ResultType, \ | |
1370 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ | |
1371 JNIWrapper("Call" XSTR(Result) "MethodV"); \ | |
1372 \ | |
1373 DTRACE_PROBE3(hotspot_jni, Call##Result##MethodV__entry, env, obj, methodID);\ | |
1374 ResultType ret = 0;\ | |
1375 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ | |
1376 (const ResultType&)ret);\ | |
1377 \ | |
1378 JavaValue jvalue(Tag); \ | |
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1379 JNI_ArgumentPusherVaArg ap(methodID, args); \ |
0 | 1380 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ |
1381 ret = jvalue.get_##ResultType(); \ | |
1382 return ret;\ | |
1383 JNI_END \ | |
1384 \ | |
1385 \ | |
1386 JNI_ENTRY(ResultType, \ | |
1387 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ | |
1388 JNIWrapper("Call" XSTR(Result) "MethodA"); \ | |
1389 DTRACE_PROBE3(hotspot_jni, Call##Result##MethodA__entry, env, obj, methodID);\ | |
1390 ResultType ret = 0;\ | |
1391 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ | |
1392 (const ResultType&)ret);\ | |
1393 \ | |
1394 JavaValue jvalue(Tag); \ | |
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1395 JNI_ArgumentPusherArray ap(methodID, args); \ |
0 | 1396 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ |
1397 ret = jvalue.get_##ResultType(); \ | |
1398 return ret;\ | |
1399 JNI_END | |
1400 | |
1401 // the runtime type of subword integral basic types is integer | |
1402 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN) | |
1403 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE) | |
1404 DEFINE_CALLMETHOD(jchar, Char, T_CHAR) | |
1405 DEFINE_CALLMETHOD(jshort, Short, T_SHORT) | |
1406 | |
1407 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT) | |
1408 DEFINE_CALLMETHOD(jint, Int, T_INT) | |
1409 DEFINE_CALLMETHOD(jlong, Long, T_LONG) | |
1410 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT) | |
1411 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE) | |
1412 | |
1413 DT_VOID_RETURN_MARK_DECL(CallVoidMethod); | |
1414 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV); | |
1415 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA); | |
1416 | |
1417 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) | |
1418 JNIWrapper("CallVoidMethod"); | |
1419 DTRACE_PROBE3(hotspot_jni, CallVoidMethod__entry, env, obj, methodID); | |
1420 DT_VOID_RETURN_MARK(CallVoidMethod); | |
1421 | |
1422 va_list args; | |
1423 va_start(args, methodID); | |
1424 JavaValue jvalue(T_VOID); | |
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1425 JNI_ArgumentPusherVaArg ap(methodID, args); |
0 | 1426 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); |
1427 va_end(args); | |
1428 JNI_END | |
1429 | |
1430 | |
1431 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) | |
1432 JNIWrapper("CallVoidMethodV"); | |
1433 DTRACE_PROBE3(hotspot_jni, CallVoidMethodV__entry, env, obj, methodID); | |
1434 DT_VOID_RETURN_MARK(CallVoidMethodV); | |
1435 | |
1436 JavaValue jvalue(T_VOID); | |
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1437 JNI_ArgumentPusherVaArg ap(methodID, args); |
0 | 1438 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); |
1439 JNI_END | |
1440 | |
1441 | |
1442 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) | |
1443 JNIWrapper("CallVoidMethodA"); | |
1444 DTRACE_PROBE3(hotspot_jni, CallVoidMethodA__entry, env, obj, methodID); | |
1445 DT_VOID_RETURN_MARK(CallVoidMethodA); | |
1446 | |
1447 JavaValue jvalue(T_VOID); | |
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1448 JNI_ArgumentPusherArray ap(methodID, args); |
0 | 1449 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); |
1450 JNI_END | |
1451 | |
1452 | |
1453 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag) \ | |
1454 \ | |
1455 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType);\ | |
1456 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType);\ | |
1457 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType);\ | |
1458 \ | |
1459 JNI_ENTRY(ResultType, \ | |
1460 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ | |
1461 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ | |
1462 \ | |
1463 DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##Method__entry, env, obj, cls, methodID);\ | |
1464 ResultType ret;\ | |
1465 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ | |
1466 (const ResultType&)ret);\ | |
1467 \ | |
1468 va_list args; \ | |
1469 va_start(args, methodID); \ | |
1470 JavaValue jvalue(Tag); \ | |
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1471 JNI_ArgumentPusherVaArg ap(methodID, args); \ |
0 | 1472 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ |
1473 va_end(args); \ | |
1474 ret = jvalue.get_##ResultType(); \ | |
1475 return ret;\ | |
1476 JNI_END \ | |
1477 \ | |
1478 JNI_ENTRY(ResultType, \ | |
1479 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ | |
1480 JNIWrapper("CallNonvitual" XSTR(Result) "#MethodV"); \ | |
1481 DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##MethodV__entry, env, obj, cls, methodID);\ | |
1482 ResultType ret;\ | |
1483 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ | |
1484 (const ResultType&)ret);\ | |
1485 \ | |
1486 JavaValue jvalue(Tag); \ | |
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1487 JNI_ArgumentPusherVaArg ap(methodID, args); \ |
0 | 1488 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ |
1489 ret = jvalue.get_##ResultType(); \ | |
1490 return ret;\ | |
1491 JNI_END \ | |
1492 \ | |
1493 JNI_ENTRY(ResultType, \ | |
1494 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ | |
1495 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ | |
1496 DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##MethodA__entry, env, obj, cls, methodID);\ | |
1497 ResultType ret;\ | |
1498 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ | |
1499 (const ResultType&)ret);\ | |
1500 \ | |
1501 JavaValue jvalue(Tag); \ | |
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1502 JNI_ArgumentPusherArray ap(methodID, args); \ |
0 | 1503 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ |
1504 ret = jvalue.get_##ResultType(); \ | |
1505 return ret;\ | |
1506 JNI_END | |
1507 | |
1508 // the runtime type of subword integral basic types is integer | |
1509 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN) | |
1510 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE) | |
1511 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR) | |
1512 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT) | |
1513 | |
1514 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT) | |
1515 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT) | |
1516 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG) | |
1517 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT) | |
1518 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE) | |
1519 | |
1520 | |
1521 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod); | |
1522 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV); | |
1523 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA); | |
1524 | |
1525 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) | |
1526 JNIWrapper("CallNonvirtualVoidMethod"); | |
1527 | |
1528 DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethod__entry, | |
1529 env, obj, cls, methodID); | |
1530 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); | |
1531 | |
1532 va_list args; | |
1533 va_start(args, methodID); | |
1534 JavaValue jvalue(T_VOID); | |
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1535 JNI_ArgumentPusherVaArg ap(methodID, args); |
0 | 1536 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); |
1537 va_end(args); | |
1538 JNI_END | |
1539 | |
1540 | |
1541 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) | |
1542 JNIWrapper("CallNonvirtualVoidMethodV"); | |
1543 | |
1544 DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethodV__entry, | |
1545 env, obj, cls, methodID); | |
1546 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); | |
1547 | |
1548 JavaValue jvalue(T_VOID); | |
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1549 JNI_ArgumentPusherVaArg ap(methodID, args); |
0 | 1550 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); |
1551 JNI_END | |
1552 | |
1553 | |
1554 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) | |
1555 JNIWrapper("CallNonvirtualVoidMethodA"); | |
1556 DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethodA__entry, | |
1557 env, obj, cls, methodID); | |
1558 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); | |
1559 JavaValue jvalue(T_VOID); | |
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1560 JNI_ArgumentPusherArray ap(methodID, args); |
0 | 1561 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); |
1562 JNI_END | |
1563 | |
1564 | |
1565 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag) \ | |
1566 \ | |
1567 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType);\ | |
1568 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType);\ | |
1569 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType);\ | |
1570 \ | |
1571 JNI_ENTRY(ResultType, \ | |
1572 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ | |
1573 JNIWrapper("CallStatic" XSTR(Result) "Method"); \ | |
1574 \ | |
1575 DTRACE_PROBE3(hotspot_jni, CallStatic##Result##Method__entry, env, cls, methodID);\ | |
1576 ResultType ret = 0;\ | |
1577 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ | |
1578 (const ResultType&)ret);\ | |
1579 \ | |
1580 va_list args; \ | |
1581 va_start(args, methodID); \ | |
1582 JavaValue jvalue(Tag); \ | |
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1583 JNI_ArgumentPusherVaArg ap(methodID, args); \ |
0 | 1584 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ |
1585 va_end(args); \ | |
1586 ret = jvalue.get_##ResultType(); \ | |
1587 return ret;\ | |
1588 JNI_END \ | |
1589 \ | |
1590 JNI_ENTRY(ResultType, \ | |
1591 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ | |
1592 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ | |
1593 DTRACE_PROBE3(hotspot_jni, CallStatic##Result##MethodV__entry, env, cls, methodID);\ | |
1594 ResultType ret = 0;\ | |
1595 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ | |
1596 (const ResultType&)ret);\ | |
1597 \ | |
1598 JavaValue jvalue(Tag); \ | |
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1599 JNI_ArgumentPusherVaArg ap(methodID, args); \ |
0 | 1600 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ |
1601 ret = jvalue.get_##ResultType(); \ | |
1602 return ret;\ | |
1603 JNI_END \ | |
1604 \ | |
1605 JNI_ENTRY(ResultType, \ | |
1606 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ | |
1607 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ | |
1608 DTRACE_PROBE3(hotspot_jni, CallStatic##Result##MethodA__entry, env, cls, methodID);\ | |
1609 ResultType ret = 0;\ | |
1610 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ | |
1611 (const ResultType&)ret);\ | |
1612 \ | |
1613 JavaValue jvalue(Tag); \ | |
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1614 JNI_ArgumentPusherArray ap(methodID, args); \ |
0 | 1615 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ |
1616 ret = jvalue.get_##ResultType(); \ | |
1617 return ret;\ | |
1618 JNI_END | |
1619 | |
1620 // the runtime type of subword integral basic types is integer | |
1621 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN) | |
1622 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE) | |
1623 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR) | |
1624 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT) | |
1625 | |
1626 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT) | |
1627 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT) | |
1628 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG) | |
1629 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT) | |
1630 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE) | |
1631 | |
1632 | |
1633 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod); | |
1634 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV); | |
1635 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA); | |
1636 | |
1637 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) | |
1638 JNIWrapper("CallStaticVoidMethod"); | |
1639 DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethod__entry, env, cls, methodID); | |
1640 DT_VOID_RETURN_MARK(CallStaticVoidMethod); | |
1641 | |
1642 va_list args; | |
1643 va_start(args, methodID); | |
1644 JavaValue jvalue(T_VOID); | |
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1645 JNI_ArgumentPusherVaArg ap(methodID, args); |
0 | 1646 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); |
1647 va_end(args); | |
1648 JNI_END | |
1649 | |
1650 | |
1651 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) | |
1652 JNIWrapper("CallStaticVoidMethodV"); | |
1653 DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethodV__entry, env, cls, methodID); | |
1654 DT_VOID_RETURN_MARK(CallStaticVoidMethodV); | |
1655 | |
1656 JavaValue jvalue(T_VOID); | |
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1657 JNI_ArgumentPusherVaArg ap(methodID, args); |
0 | 1658 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); |
1659 JNI_END | |
1660 | |
1661 | |
1662 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) | |
1663 JNIWrapper("CallStaticVoidMethodA"); | |
1664 DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethodA__entry, env, cls, methodID); | |
1665 DT_VOID_RETURN_MARK(CallStaticVoidMethodA); | |
1666 | |
1667 JavaValue jvalue(T_VOID); | |
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1668 JNI_ArgumentPusherArray ap(methodID, args); |
0 | 1669 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); |
1670 JNI_END | |
1671 | |
1672 | |
1673 // | |
1674 // Accessing Fields | |
1675 // | |
1676 | |
1677 | |
1678 DT_RETURN_MARK_DECL(GetFieldID, jfieldID); | |
1679 | |
1680 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, | |
1681 const char *name, const char *sig)) | |
1682 JNIWrapper("GetFieldID"); | |
1683 DTRACE_PROBE4(hotspot_jni, GetFieldID__entry, env, clazz, name, sig); | |
1684 jfieldID ret = 0; | |
1685 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); | |
1686 | |
1687 // The class should have been loaded (we have an instance of the class | |
1688 // passed in) so the field and signature should already be in the symbol | |
1689 // table. If they're not there, the field doesn't exist. | |
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1690 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); |
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1691 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); |
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1692 if (fieldname == NULL || signame == NULL) { |
0 | 1693 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); |
1694 } | |
1695 KlassHandle k(THREAD, | |
1696 java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
1697 // Make sure class is initialized before handing id's out to fields | |
1698 Klass::cast(k())->initialize(CHECK_NULL); | |
1699 | |
1700 fieldDescriptor fd; | |
1701 if (!Klass::cast(k())->oop_is_instance() || | |
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1702 !instanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) { |
0 | 1703 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); |
1704 } | |
1705 | |
1706 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop | |
1707 // It may also have hash bits for k, if VerifyJNIFields is turned on. | |
1708 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset()); | |
1709 return ret; | |
1710 JNI_END | |
1711 | |
1712 | |
1713 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) | |
1714 JNIWrapper("GetObjectField"); | |
1715 DTRACE_PROBE3(hotspot_jni, GetObjectField__entry, env, obj, fieldID); | |
1716 oop o = JNIHandles::resolve_non_null(obj); | |
1717 klassOop k = o->klass(); | |
1718 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); | |
1719 // Keep JVMTI addition small and only check enabled flag here. | |
1720 // jni_GetField_probe() assumes that is okay to create handles. | |
1721 if (JvmtiExport::should_post_field_access()) { | |
1722 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); | |
1723 } | |
1724 jobject ret = JNIHandles::make_local(env, o->obj_field(offset)); | |
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1725 #ifndef SERIALGC |
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1726 // If G1 is enabled and we are accessing the value of the referent |
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1727 // field in a reference object then we need to register a non-null |
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1728 // referent with the SATB barrier. |
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1729 if (UseG1GC) { |
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1730 bool needs_barrier = false; |
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1731 |
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1732 if (ret != NULL && |
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1733 offset == java_lang_ref_Reference::referent_offset && |
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1734 instanceKlass::cast(k)->reference_type() != REF_NONE) { |
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1735 assert(instanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); |
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1736 needs_barrier = true; |
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1737 } |
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1738 |
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1739 if (needs_barrier) { |
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1740 oop referent = JNIHandles::resolve(ret); |
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1741 G1SATBCardTableModRefBS::enqueue(referent); |
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1742 } |
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1743 } |
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1744 #endif // SERIALGC |
0 | 1745 DTRACE_PROBE1(hotspot_jni, GetObjectField__return, ret); |
1746 return ret; | |
1747 JNI_END | |
1748 | |
1749 | |
1750 #define DEFINE_GETFIELD(Return,Fieldname,Result) \ | |
1751 \ | |
1752 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return);\ | |
1753 \ | |
1754 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ | |
1755 JNIWrapper("Get" XSTR(Result) "Field"); \ | |
1756 \ | |
1757 DTRACE_PROBE3(hotspot_jni, Get##Result##Field__entry, env, obj, fieldID);\ | |
1758 Return ret = 0;\ | |
1759 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ | |
1760 \ | |
1761 oop o = JNIHandles::resolve_non_null(obj); \ | |
1762 klassOop k = o->klass(); \ | |
1763 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ | |
1764 /* Keep JVMTI addition small and only check enabled flag here. */ \ | |
1765 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ | |
1766 /* and creates a ResetNoHandleMark. */ \ | |
1767 if (JvmtiExport::should_post_field_access()) { \ | |
1768 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ | |
1769 } \ | |
1770 ret = o->Fieldname##_field(offset); \ | |
1771 return ret; \ | |
1772 JNI_END | |
1773 | |
1774 DEFINE_GETFIELD(jboolean, bool, Boolean) | |
1775 DEFINE_GETFIELD(jbyte, byte, Byte) | |
1776 DEFINE_GETFIELD(jchar, char, Char) | |
1777 DEFINE_GETFIELD(jshort, short, Short) | |
1778 DEFINE_GETFIELD(jint, int, Int) | |
1779 DEFINE_GETFIELD(jlong, long, Long) | |
1780 DEFINE_GETFIELD(jfloat, float, Float) | |
1781 DEFINE_GETFIELD(jdouble, double, Double) | |
1782 | |
1783 address jni_GetBooleanField_addr() { | |
1784 return (address)jni_GetBooleanField; | |
1785 } | |
1786 address jni_GetByteField_addr() { | |
1787 return (address)jni_GetByteField; | |
1788 } | |
1789 address jni_GetCharField_addr() { | |
1790 return (address)jni_GetCharField; | |
1791 } | |
1792 address jni_GetShortField_addr() { | |
1793 return (address)jni_GetShortField; | |
1794 } | |
1795 address jni_GetIntField_addr() { | |
1796 return (address)jni_GetIntField; | |
1797 } | |
1798 address jni_GetLongField_addr() { | |
1799 return (address)jni_GetLongField; | |
1800 } | |
1801 address jni_GetFloatField_addr() { | |
1802 return (address)jni_GetFloatField; | |
1803 } | |
1804 address jni_GetDoubleField_addr() { | |
1805 return (address)jni_GetDoubleField; | |
1806 } | |
1807 | |
1808 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) | |
1809 JNIWrapper("SetObjectField"); | |
1810 DTRACE_PROBE4(hotspot_jni, SetObjectField__entry, env, obj, fieldID, value); | |
1811 oop o = JNIHandles::resolve_non_null(obj); | |
1812 klassOop k = o->klass(); | |
1813 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); | |
1814 // Keep JVMTI addition small and only check enabled flag here. | |
1815 // jni_SetField_probe_nh() assumes that is not okay to create handles | |
1816 // and creates a ResetNoHandleMark. | |
1817 if (JvmtiExport::should_post_field_modification()) { | |
1818 jvalue field_value; | |
1819 field_value.l = value; | |
1820 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value); | |
1821 } | |
1822 o->obj_field_put(offset, JNIHandles::resolve(value)); | |
1823 DTRACE_PROBE(hotspot_jni, SetObjectField__return); | |
1824 JNI_END | |
1825 | |
1826 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType) \ | |
1827 \ | |
1828 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ | |
1829 JNIWrapper("Set" XSTR(Result) "Field"); \ | |
1830 \ | |
1831 HS_DTRACE_PROBE_CDECL_N(hotspot_jni, Set##Result##Field__entry, \ | |
1832 ( JNIEnv*, jobject, jfieldID FP_SELECT_##Result(COMMA Argument,/*empty*/) ) ); \ | |
1833 HS_DTRACE_PROBE_N(hotspot_jni, Set##Result##Field__entry, \ | |
1834 ( env, obj, fieldID FP_SELECT_##Result(COMMA value,/*empty*/) ) ); \ | |
1835 \ | |
1836 oop o = JNIHandles::resolve_non_null(obj); \ | |
1837 klassOop k = o->klass(); \ | |
1838 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ | |
1839 /* Keep JVMTI addition small and only check enabled flag here. */ \ | |
1840 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ | |
1841 /* and creates a ResetNoHandleMark. */ \ | |
1842 if (JvmtiExport::should_post_field_modification()) { \ | |
1843 jvalue field_value; \ | |
1844 field_value.unionType = value; \ | |
1845 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ | |
1846 } \ | |
1847 o->Fieldname##_field_put(offset, value); \ | |
1848 DTRACE_PROBE(hotspot_jni, Set##Result##Field__return);\ | |
1849 JNI_END | |
1850 | |
1851 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z) | |
1852 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b) | |
1853 DEFINE_SETFIELD(jchar, char, Char, 'C', c) | |
1854 DEFINE_SETFIELD(jshort, short, Short, 'S', s) | |
1855 DEFINE_SETFIELD(jint, int, Int, 'I', i) | |
1856 DEFINE_SETFIELD(jlong, long, Long, 'J', j) | |
1857 DEFINE_SETFIELD(jfloat, float, Float, 'F', f) | |
1858 DEFINE_SETFIELD(jdouble, double, Double, 'D', d) | |
1859 | |
1860 DT_RETURN_MARK_DECL(ToReflectedField, jobject); | |
1861 | |
1862 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) | |
1863 JNIWrapper("ToReflectedField"); | |
1864 DTRACE_PROBE4(hotspot_jni, ToReflectedField__entry, | |
1865 env, cls, fieldID, isStatic); | |
1866 jobject ret = NULL; | |
1867 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); | |
1868 | |
1869 fieldDescriptor fd; | |
1870 bool found = false; | |
1871 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1872 | |
1873 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); | |
1874 | |
1875 if (isStatic) { | |
1876 // Static field. The fieldID a JNIid specifying the field holder and the offset within the klassOop. | |
1877 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); | |
1878 assert(id->is_static_field_id(), "invalid static field id"); | |
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1879 found = id->find_local_field(&fd); |
0 | 1880 } else { |
1881 // Non-static field. The fieldID is really the offset of the field within the instanceOop. | |
1882 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); | |
1883 found = instanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); | |
1884 } | |
1885 assert(found, "bad fieldID passed into jni_ToReflectedField"); | |
1886 oop reflected = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); | |
1887 ret = JNIHandles::make_local(env, reflected); | |
1888 return ret; | |
1889 JNI_END | |
1890 | |
1891 | |
1892 // | |
1893 // Accessing Static Fields | |
1894 // | |
1895 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID); | |
1896 | |
1897 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, | |
1898 const char *name, const char *sig)) | |
1899 JNIWrapper("GetStaticFieldID"); | |
1900 DTRACE_PROBE4(hotspot_jni, GetStaticFieldID__entry, env, clazz, name, sig); | |
1901 jfieldID ret = NULL; | |
1902 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); | |
1903 | |
1904 // The class should have been loaded (we have an instance of the class | |
1905 // passed in) so the field and signature should already be in the symbol | |
1906 // table. If they're not there, the field doesn't exist. | |
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1907 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); |
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1908 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); |
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1909 if (fieldname == NULL || signame == NULL) { |
0 | 1910 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); |
1911 } | |
1912 KlassHandle k(THREAD, | |
1913 java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
1914 // Make sure class is initialized before handing id's out to static fields | |
1915 Klass::cast(k())->initialize(CHECK_NULL); | |
1916 | |
1917 fieldDescriptor fd; | |
1918 if (!Klass::cast(k())->oop_is_instance() || | |
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1919 !instanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) { |
0 | 1920 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); |
1921 } | |
1922 | |
1923 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the klassOop | |
1924 JNIid* id = instanceKlass::cast(fd.field_holder())->jni_id_for(fd.offset()); | |
1925 debug_only(id->set_is_static_field_id();) | |
1926 | |
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1927 debug_only(id->verify(fd.field_holder())); |
0 | 1928 |
1929 ret = jfieldIDWorkaround::to_static_jfieldID(id); | |
1930 return ret; | |
1931 JNI_END | |
1932 | |
1933 | |
1934 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID)) | |
1935 JNIWrapper("GetStaticObjectField"); | |
1936 DTRACE_PROBE3(hotspot_jni, GetStaticObjectField__entry, env, clazz, fieldID); | |
1937 #ifndef JNICHECK_KERNEL | |
1938 DEBUG_ONLY(klassOop param_k = jniCheck::validate_class(thread, clazz);) | |
1939 #endif // JNICHECK_KERNEL | |
1940 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); | |
1941 assert(id->is_static_field_id(), "invalid static field id"); | |
1942 // Keep JVMTI addition small and only check enabled flag here. | |
1943 // jni_GetField_probe() assumes that is okay to create handles. | |
1944 if (JvmtiExport::should_post_field_access()) { | |
1945 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); | |
1946 } | |
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1947 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset())); |
0 | 1948 DTRACE_PROBE1(hotspot_jni, GetStaticObjectField__return, ret); |
1949 return ret; | |
1950 JNI_END | |
1951 | |
1952 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result) \ | |
1953 \ | |
1954 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return);\ | |
1955 \ | |
1956 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \ | |
1957 JNIWrapper("GetStatic" XSTR(Result) "Field"); \ | |
1958 DTRACE_PROBE3(hotspot_jni, GetStatic##Result##Field__entry, env, clazz, fieldID);\ | |
1959 Return ret = 0;\ | |
1960 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \ | |
1961 (const Return&)ret);\ | |
1962 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ | |
1963 assert(id->is_static_field_id(), "invalid static field id"); \ | |
1964 /* Keep JVMTI addition small and only check enabled flag here. */ \ | |
1965 /* jni_GetField_probe() assumes that is okay to create handles. */ \ | |
1966 if (JvmtiExport::should_post_field_access()) { \ | |
1967 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \ | |
1968 } \ | |
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1969 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \ |
0 | 1970 return ret;\ |
1971 JNI_END | |
1972 | |
1973 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean) | |
1974 DEFINE_GETSTATICFIELD(jbyte, byte, Byte) | |
1975 DEFINE_GETSTATICFIELD(jchar, char, Char) | |
1976 DEFINE_GETSTATICFIELD(jshort, short, Short) | |
1977 DEFINE_GETSTATICFIELD(jint, int, Int) | |
1978 DEFINE_GETSTATICFIELD(jlong, long, Long) | |
1979 DEFINE_GETSTATICFIELD(jfloat, float, Float) | |
1980 DEFINE_GETSTATICFIELD(jdouble, double, Double) | |
1981 | |
1982 | |
1983 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value)) | |
1984 JNIWrapper("SetStaticObjectField"); | |
1985 DTRACE_PROBE4(hotspot_jni, SetStaticObjectField__entry, env, clazz, fieldID, value); | |
1986 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); | |
1987 assert(id->is_static_field_id(), "invalid static field id"); | |
1988 // Keep JVMTI addition small and only check enabled flag here. | |
1989 // jni_SetField_probe() assumes that is okay to create handles. | |
1990 if (JvmtiExport::should_post_field_modification()) { | |
1991 jvalue field_value; | |
1992 field_value.l = value; | |
1993 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value); | |
1994 } | |
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1995 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value)); |
0 | 1996 DTRACE_PROBE(hotspot_jni, SetStaticObjectField__return); |
1997 JNI_END | |
1998 | |
1999 | |
2000 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType) \ | |
2001 \ | |
2002 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \ | |
2003 JNIWrapper("SetStatic" XSTR(Result) "Field"); \ | |
2004 HS_DTRACE_PROBE_CDECL_N(hotspot_jni, SetStatic##Result##Field__entry,\ | |
2005 ( JNIEnv*, jclass, jfieldID FP_SELECT_##Result(COMMA Argument,/*empty*/) ) ); \ | |
2006 HS_DTRACE_PROBE_N(hotspot_jni, SetStatic##Result##Field__entry, \ | |
2007 ( env, clazz, fieldID FP_SELECT_##Result(COMMA value,/*empty*/) ) ); \ | |
2008 \ | |
2009 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \ | |
2010 assert(id->is_static_field_id(), "invalid static field id"); \ | |
2011 /* Keep JVMTI addition small and only check enabled flag here. */ \ | |
2012 /* jni_SetField_probe() assumes that is okay to create handles. */ \ | |
2013 if (JvmtiExport::should_post_field_modification()) { \ | |
2014 jvalue field_value; \ | |
2015 field_value.unionType = value; \ | |
2016 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \ | |
2017 } \ | |
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2018 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ |
0 | 2019 DTRACE_PROBE(hotspot_jni, SetStatic##Result##Field__return);\ |
2020 JNI_END | |
2021 | |
2022 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z) | |
2023 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b) | |
2024 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c) | |
2025 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s) | |
2026 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i) | |
2027 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j) | |
2028 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f) | |
2029 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d) | |
2030 | |
2031 | |
2032 // | |
2033 // String Operations | |
2034 // | |
2035 | |
2036 // Unicode Interface | |
2037 | |
2038 DT_RETURN_MARK_DECL(NewString, jstring); | |
2039 | |
2040 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) | |
2041 JNIWrapper("NewString"); | |
2042 DTRACE_PROBE3(hotspot_jni, NewString__entry, env, unicodeChars, len); | |
2043 jstring ret = NULL; | |
2044 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); | |
2045 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); | |
2046 ret = (jstring) JNIHandles::make_local(env, string); | |
2047 return ret; | |
2048 JNI_END | |
2049 | |
2050 | |
2051 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) | |
2052 JNIWrapper("GetStringLength"); | |
2053 DTRACE_PROBE2(hotspot_jni, GetStringLength__entry, env, string); | |
2054 jsize ret = java_lang_String::length(JNIHandles::resolve_non_null(string)); | |
2055 DTRACE_PROBE1(hotspot_jni, GetStringLength__return, ret); | |
2056 return ret; | |
2057 JNI_END | |
2058 | |
2059 | |
2060 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars( | |
2061 JNIEnv *env, jstring string, jboolean *isCopy)) | |
2062 JNIWrapper("GetStringChars"); | |
2063 DTRACE_PROBE3(hotspot_jni, GetStringChars__entry, env, string, isCopy); | |
2064 //%note jni_5 | |
2065 if (isCopy != NULL) { | |
2066 *isCopy = JNI_TRUE; | |
2067 } | |
2068 oop s = JNIHandles::resolve_non_null(string); | |
2069 int s_len = java_lang_String::length(s); | |
2070 typeArrayOop s_value = java_lang_String::value(s); | |
2071 int s_offset = java_lang_String::offset(s); | |
2072 jchar* buf = NEW_C_HEAP_ARRAY(jchar, s_len + 1); // add one for zero termination | |
2073 if (s_len > 0) { | |
2074 memcpy(buf, s_value->char_at_addr(s_offset), sizeof(jchar)*s_len); | |
2075 } | |
2076 buf[s_len] = 0; | |
2077 DTRACE_PROBE1(hotspot_jni, GetStringChars__return, buf); | |
2078 return buf; | |
2079 JNI_END | |
2080 | |
2081 | |
2082 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) | |
2083 JNIWrapper("ReleaseStringChars"); | |
2084 DTRACE_PROBE3(hotspot_jni, ReleaseStringChars__entry, env, str, chars); | |
2085 //%note jni_6 | |
2086 if (chars != NULL) { | |
2087 // Since String objects are supposed to be immutable, don't copy any | |
2088 // new data back. A bad user will have to go after the char array. | |
2089 FreeHeap((void*) chars); | |
2090 } | |
2091 DTRACE_PROBE(hotspot_jni, ReleaseStringChars__return); | |
2092 JNI_END | |
2093 | |
2094 | |
2095 // UTF Interface | |
2096 | |
2097 DT_RETURN_MARK_DECL(NewStringUTF, jstring); | |
2098 | |
2099 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) | |
2100 JNIWrapper("NewStringUTF"); | |
2101 DTRACE_PROBE2(hotspot_jni, NewStringUTF__entry, env, bytes); | |
2102 jstring ret; | |
2103 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); | |
2104 | |
2105 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); | |
2106 ret = (jstring) JNIHandles::make_local(env, result); | |
2107 return ret; | |
2108 JNI_END | |
2109 | |
2110 | |
2111 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) | |
2112 JNIWrapper("GetStringUTFLength"); | |
2113 DTRACE_PROBE2(hotspot_jni, GetStringUTFLength__entry, env, string); | |
2114 jsize ret = java_lang_String::utf8_length(JNIHandles::resolve_non_null(string)); | |
2115 DTRACE_PROBE1(hotspot_jni, GetStringUTFLength__return, ret); | |
2116 return ret; | |
2117 JNI_END | |
2118 | |
2119 | |
2120 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) | |
2121 JNIWrapper("GetStringUTFChars"); | |
2122 DTRACE_PROBE3(hotspot_jni, GetStringUTFChars__entry, env, string, isCopy); | |
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2123 oop java_string = JNIHandles::resolve_non_null(string); |
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2124 size_t length = java_lang_String::utf8_length(java_string); |
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2125 char* result = AllocateHeap(length + 1, "GetStringUTFChars"); |
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2126 java_lang_String::as_utf8_string(java_string, result, (int) length + 1); |
0 | 2127 if (isCopy != NULL) *isCopy = JNI_TRUE; |
2128 DTRACE_PROBE1(hotspot_jni, GetStringUTFChars__return, result); | |
2129 return result; | |
2130 JNI_END | |
2131 | |
2132 | |
2133 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) | |
2134 JNIWrapper("ReleaseStringUTFChars"); | |
2135 DTRACE_PROBE3(hotspot_jni, ReleaseStringUTFChars__entry, env, str, chars); | |
2136 if (chars != NULL) { | |
2137 FreeHeap((char*) chars); | |
2138 } | |
2139 DTRACE_PROBE(hotspot_jni, ReleaseStringUTFChars__return); | |
2140 JNI_END | |
2141 | |
2142 | |
2143 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) | |
2144 JNIWrapper("GetArrayLength"); | |
2145 DTRACE_PROBE2(hotspot_jni, GetArrayLength__entry, env, array); | |
2146 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); | |
2147 assert(a->is_array(), "must be array"); | |
2148 jsize ret = a->length(); | |
2149 DTRACE_PROBE1(hotspot_jni, GetArrayLength__return, ret); | |
2150 return ret; | |
2151 JNI_END | |
2152 | |
2153 | |
2154 // | |
2155 // Object Array Operations | |
2156 // | |
2157 | |
2158 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray); | |
2159 | |
2160 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) | |
2161 JNIWrapper("NewObjectArray"); | |
2162 DTRACE_PROBE4(hotspot_jni, NewObjectArray__entry, env, length, elementClass, initialElement); | |
2163 jobjectArray ret = NULL; | |
2164 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); | |
2165 KlassHandle ek(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(elementClass))); | |
2166 klassOop ako = Klass::cast(ek())->array_klass(CHECK_NULL); | |
2167 KlassHandle ak = KlassHandle(THREAD, ako); | |
2168 objArrayKlass::cast(ak())->initialize(CHECK_NULL); | |
2169 objArrayOop result = objArrayKlass::cast(ak())->allocate(length, CHECK_NULL); | |
2170 oop initial_value = JNIHandles::resolve(initialElement); | |
2171 if (initial_value != NULL) { // array already initialized with NULL | |
2172 for (int index = 0; index < length; index++) { | |
2173 result->obj_at_put(index, initial_value); | |
2174 } | |
2175 } | |
2176 ret = (jobjectArray) JNIHandles::make_local(env, result); | |
2177 return ret; | |
2178 JNI_END | |
2179 | |
2180 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject); | |
2181 | |
2182 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) | |
2183 JNIWrapper("GetObjectArrayElement"); | |
2184 DTRACE_PROBE3(hotspot_jni, GetObjectArrayElement__entry, env, array, index); | |
2185 jobject ret = NULL; | |
2186 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); | |
2187 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); | |
2188 if (a->is_within_bounds(index)) { | |
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2189 ret = JNIHandles::make_local(env, a->obj_at(index)); |
0 | 2190 return ret; |
2191 } else { | |
2192 char buf[jintAsStringSize]; | |
2193 sprintf(buf, "%d", index); | |
2194 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); | |
2195 } | |
2196 JNI_END | |
2197 | |
2198 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement); | |
2199 | |
2200 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) | |
2201 JNIWrapper("SetObjectArrayElement"); | |
2202 DTRACE_PROBE4(hotspot_jni, SetObjectArrayElement__entry, env, array, index, value); | |
2203 DT_VOID_RETURN_MARK(SetObjectArrayElement); | |
2204 | |
2205 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); | |
2206 oop v = JNIHandles::resolve(value); | |
2207 if (a->is_within_bounds(index)) { | |
2208 if (v == NULL || v->is_a(objArrayKlass::cast(a->klass())->element_klass())) { | |
2209 a->obj_at_put(index, v); | |
2210 } else { | |
2211 THROW(vmSymbols::java_lang_ArrayStoreException()); | |
2212 } | |
2213 } else { | |
2214 char buf[jintAsStringSize]; | |
2215 sprintf(buf, "%d", index); | |
2216 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); | |
2217 } | |
2218 JNI_END | |
2219 | |
2220 | |
2221 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result) \ | |
2222 \ | |
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2223 DT_RETURN_MARK_DECL(New##Result##Array, Return);\ |
0 | 2224 \ |
2225 JNI_ENTRY(Return, \ | |
2226 jni_New##Result##Array(JNIEnv *env, jsize len)) \ | |
2227 JNIWrapper("New" XSTR(Result) "Array"); \ | |
2228 DTRACE_PROBE2(hotspot_jni, New##Result##Array__entry, env, len);\ | |
2229 Return ret = NULL;\ | |
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2230 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ |
0 | 2231 \ |
2232 oop obj= oopFactory::Allocator(len, CHECK_0); \ | |
2233 ret = (Return) JNIHandles::make_local(env, obj); \ | |
2234 return ret;\ | |
2235 JNI_END | |
2236 | |
2237 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean) | |
2238 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte) | |
2239 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short) | |
2240 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char) | |
2241 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int) | |
2242 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long) | |
2243 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float) | |
2244 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double) | |
2245 | |
2246 | |
2247 // Return an address which will fault if the caller writes to it. | |
2248 | |
2249 static char* get_bad_address() { | |
2250 static char* bad_address = NULL; | |
2251 if (bad_address == NULL) { | |
2252 size_t size = os::vm_allocation_granularity(); | |
2253 bad_address = os::reserve_memory(size); | |
2254 if (bad_address != NULL) { | |
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2255 os::protect_memory(bad_address, size, os::MEM_PROT_READ, |
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2256 /*is_committed*/false); |
0 | 2257 } |
2258 } | |
2259 return bad_address; | |
2260 } | |
2261 | |
2262 | |
2263 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag) \ | |
2264 \ | |
2265 JNI_QUICK_ENTRY(ElementType*, \ | |
2266 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ | |
2267 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ | |
2268 DTRACE_PROBE3(hotspot_jni, Get##Result##ArrayElements__entry, env, array, isCopy);\ | |
2269 /* allocate an chunk of memory in c land */ \ | |
2270 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ | |
2271 ElementType* result; \ | |
2272 int len = a->length(); \ | |
2273 if (len == 0) { \ | |
2274 /* Empty array: legal but useless, can't return NULL. \ | |
2275 * Return a pointer to something useless. \ | |
2276 * Avoid asserts in typeArrayOop. */ \ | |
2277 result = (ElementType*)get_bad_address(); \ | |
2278 } else { \ | |
2279 result = NEW_C_HEAP_ARRAY(ElementType, len); \ | |
2280 /* copy the array to the c chunk */ \ | |
2281 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \ | |
2282 } \ | |
2283 if (isCopy) *isCopy = JNI_TRUE; \ | |
2284 DTRACE_PROBE1(hotspot_jni, Get##Result##ArrayElements__return, result);\ | |
2285 return result; \ | |
2286 JNI_END | |
2287 | |
2288 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool) | |
2289 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte) | |
2290 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short) | |
2291 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char) | |
2292 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int) | |
2293 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long) | |
2294 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float) | |
2295 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double) | |
2296 | |
2297 | |
2298 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag) \ | |
2299 \ | |
2300 JNI_QUICK_ENTRY(void, \ | |
2301 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ | |
2302 ElementType *buf, jint mode)) \ | |
2303 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ | |
2304 DTRACE_PROBE4(hotspot_jni, Release##Result##ArrayElements__entry, env, array, buf, mode);\ | |
2305 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ | |
2306 int len = a->length(); \ | |
2307 if (len != 0) { /* Empty array: nothing to free or copy. */ \ | |
2308 if ((mode == 0) || (mode == JNI_COMMIT)) { \ | |
2309 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \ | |
2310 } \ | |
2311 if ((mode == 0) || (mode == JNI_ABORT)) { \ | |
2312 FreeHeap(buf); \ | |
2313 } \ | |
2314 } \ | |
2315 DTRACE_PROBE(hotspot_jni, Release##Result##ArrayElements__return);\ | |
2316 JNI_END | |
2317 | |
2318 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool) | |
2319 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte) | |
2320 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short) | |
2321 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char) | |
2322 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int) | |
2323 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long) | |
2324 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float) | |
2325 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double) | |
2326 | |
2327 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag) \ | |
2328 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion);\ | |
2329 \ | |
2330 JNI_ENTRY(void, \ | |
2331 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ | |
2332 jsize len, ElementType *buf)) \ | |
2333 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ | |
2334 DTRACE_PROBE5(hotspot_jni, Get##Result##ArrayRegion__entry, env, array, start, len, buf);\ | |
2335 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ | |
2336 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ | |
2337 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \ | |
2338 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ | |
2339 } else { \ | |
2340 if (len > 0) { \ | |
2341 int sc = typeArrayKlass::cast(src->klass())->log2_element_size(); \ | |
2342 memcpy((u_char*) buf, \ | |
2343 (u_char*) src->Tag##_at_addr(start), \ | |
2344 len << sc); \ | |
2345 } \ | |
2346 } \ | |
2347 JNI_END | |
2348 | |
2349 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool) | |
2350 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte) | |
2351 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short) | |
2352 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char) | |
2353 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int) | |
2354 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long) | |
2355 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float) | |
2356 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double) | |
2357 | |
2358 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag) \ | |
2359 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion);\ | |
2360 \ | |
2361 JNI_ENTRY(void, \ | |
2362 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ | |
2363 jsize len, const ElementType *buf)) \ | |
2364 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ | |
2365 DTRACE_PROBE5(hotspot_jni, Set##Result##ArrayRegion__entry, env, array, start, len, buf);\ | |
2366 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ | |
2367 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ | |
2368 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \ | |
2369 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ | |
2370 } else { \ | |
2371 if (len > 0) { \ | |
2372 int sc = typeArrayKlass::cast(dst->klass())->log2_element_size(); \ | |
2373 memcpy((u_char*) dst->Tag##_at_addr(start), \ | |
2374 (u_char*) buf, \ | |
2375 len << sc); \ | |
2376 } \ | |
2377 } \ | |
2378 JNI_END | |
2379 | |
2380 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool) | |
2381 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte) | |
2382 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short) | |
2383 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char) | |
2384 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int) | |
2385 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long) | |
2386 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float) | |
2387 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double) | |
2388 | |
2389 | |
2390 // | |
2391 // Interception of natives | |
2392 // | |
2393 | |
2394 // The RegisterNatives call being attempted tried to register with a method that | |
2395 // is not native. Ask JVM TI what prefixes have been specified. Then check | |
2396 // to see if the native method is now wrapped with the prefixes. See the | |
2397 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details. | |
2398 static methodOop find_prefixed_native(KlassHandle k, | |
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2399 Symbol* name, Symbol* signature, TRAPS) { |
0 | 2400 ResourceMark rm(THREAD); |
2401 methodOop method; | |
2402 int name_len = name->utf8_length(); | |
2403 char* name_str = name->as_utf8(); | |
2404 int prefix_count; | |
2405 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); | |
2406 for (int i = 0; i < prefix_count; i++) { | |
2407 char* prefix = prefixes[i]; | |
2408 int prefix_len = (int)strlen(prefix); | |
2409 | |
2410 // try adding this prefix to the method name and see if it matches another method name | |
2411 int trial_len = name_len + prefix_len; | |
2412 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1); | |
2413 strcpy(trial_name_str, prefix); | |
2414 strcat(trial_name_str, name_str); | |
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2415 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len); |
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2416 if (trial_name == NULL) { |
0 | 2417 continue; // no such symbol, so this prefix wasn't used, try the next prefix |
2418 } | |
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2419 method = Klass::cast(k())->lookup_method(trial_name, signature); |
0 | 2420 if (method == NULL) { |
2421 continue; // signature doesn't match, try the next prefix | |
2422 } | |
2423 if (method->is_native()) { | |
2424 method->set_is_prefixed_native(); | |
2425 return method; // wahoo, we found a prefixed version of the method, return it | |
2426 } | |
2427 // found as non-native, so prefix is good, add it, probably just need more prefixes | |
2428 name_len = trial_len; | |
2429 name_str = trial_name_str; | |
2430 } | |
2431 return NULL; // not found | |
2432 } | |
2433 | |
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changeset
|
2434 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) { |
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diff
changeset
|
2435 methodOop method = Klass::cast(k())->lookup_method(name, signature); |
0 | 2436 if (method == NULL) { |
2437 ResourceMark rm; | |
2438 stringStream st; | |
2439 st.print("Method %s name or signature does not match", | |
2177
3582bf76420e
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coleenp
parents:
1989
diff
changeset
|
2440 methodOopDesc::name_and_sig_as_C_string(Klass::cast(k()), name, signature)); |
0 | 2441 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); |
2442 } | |
2443 if (!method->is_native()) { | |
2444 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es) | |
2445 method = find_prefixed_native(k, name, signature, THREAD); | |
2446 if (method == NULL) { | |
2447 ResourceMark rm; | |
2448 stringStream st; | |
2449 st.print("Method %s is not declared as native", | |
2177
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diff
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|
2450 methodOopDesc::name_and_sig_as_C_string(Klass::cast(k()), name, signature)); |
0 | 2451 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); |
2452 } | |
2453 } | |
2454 | |
2455 if (entry != NULL) { | |
2456 method->set_native_function(entry, | |
2457 methodOopDesc::native_bind_event_is_interesting); | |
2458 } else { | |
2459 method->clear_native_function(); | |
2460 } | |
2461 if (PrintJNIResolving) { | |
2462 ResourceMark rm(THREAD); | |
2463 tty->print_cr("[Registering JNI native method %s.%s]", | |
2464 Klass::cast(method->method_holder())->external_name(), | |
2465 method->name()->as_C_string()); | |
2466 } | |
2467 return true; | |
2468 } | |
2469 | |
2470 DT_RETURN_MARK_DECL(RegisterNatives, jint); | |
2471 | |
2472 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, | |
2473 const JNINativeMethod *methods, | |
2474 jint nMethods)) | |
2475 JNIWrapper("RegisterNatives"); | |
2476 DTRACE_PROBE4(hotspot_jni, RegisterNatives__entry, env, clazz, methods, nMethods); | |
2477 jint ret = 0; | |
2478 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); | |
2479 | |
2480 KlassHandle h_k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
2481 | |
2482 for (int index = 0; index < nMethods; index++) { | |
2483 const char* meth_name = methods[index].name; | |
2484 const char* meth_sig = methods[index].signature; | |
2485 int meth_name_len = (int)strlen(meth_name); | |
2486 | |
2487 // The class should have been loaded (we have an instance of the class | |
2488 // passed in) so the method and signature should already be in the symbol | |
2489 // table. If they're not there, the method doesn't exist. | |
2177
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1989
diff
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|
2490 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); |
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1989
diff
changeset
|
2491 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); |
3582bf76420e
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parents:
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diff
changeset
|
2492 |
3582bf76420e
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parents:
1989
diff
changeset
|
2493 if (name == NULL || signature == NULL) { |
0 | 2494 ResourceMark rm; |
2495 stringStream st; | |
2496 st.print("Method %s.%s%s not found", Klass::cast(h_k())->external_name(), meth_name, meth_sig); | |
2497 // Must return negative value on failure | |
2498 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); | |
2499 } | |
2500 | |
2501 bool res = register_native(h_k, name, signature, | |
2502 (address) methods[index].fnPtr, THREAD); | |
2503 if (!res) { | |
2504 ret = -1; | |
2505 break; | |
2506 } | |
2507 } | |
2508 return ret; | |
2509 JNI_END | |
2510 | |
2511 | |
2512 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) | |
2513 JNIWrapper("UnregisterNatives"); | |
2514 DTRACE_PROBE2(hotspot_jni, UnregisterNatives__entry, env, clazz); | |
2515 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz)); | |
2516 //%note jni_2 | |
2517 if (Klass::cast(k)->oop_is_instance()) { | |
2518 for (int index = 0; index < instanceKlass::cast(k)->methods()->length(); index++) { | |
2519 methodOop m = methodOop(instanceKlass::cast(k)->methods()->obj_at(index)); | |
2520 if (m->is_native()) { | |
2521 m->clear_native_function(); | |
2522 m->set_signature_handler(NULL); | |
2523 } | |
2524 } | |
2525 } | |
2526 DTRACE_PROBE1(hotspot_jni, UnregisterNatives__return, 0); | |
2527 return 0; | |
2528 JNI_END | |
2529 | |
2530 // | |
2531 // Monitor functions | |
2532 // | |
2533 | |
2534 DT_RETURN_MARK_DECL(MonitorEnter, jint); | |
2535 | |
2536 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) | |
2537 DTRACE_PROBE2(hotspot_jni, MonitorEnter__entry, env, jobj); | |
2538 jint ret = JNI_ERR; | |
2539 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); | |
2540 | |
2541 // If the object is null, we can't do anything with it | |
2542 if (jobj == NULL) { | |
2543 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); | |
2544 } | |
2545 | |
2546 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
2547 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR)); | |
2548 ret = JNI_OK; | |
2549 return ret; | |
2550 JNI_END | |
2551 | |
2552 DT_RETURN_MARK_DECL(MonitorExit, jint); | |
2553 | |
2554 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) | |
2555 DTRACE_PROBE2(hotspot_jni, MonitorExit__entry, env, jobj); | |
2556 jint ret = JNI_ERR; | |
2557 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); | |
2558 | |
2559 // Don't do anything with a null object | |
2560 if (jobj == NULL) { | |
2561 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); | |
2562 } | |
2563 | |
2564 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); | |
2565 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); | |
2566 | |
2567 ret = JNI_OK; | |
2568 return ret; | |
2569 JNI_END | |
2570 | |
2571 // | |
2572 // Extensions | |
2573 // | |
2574 | |
2575 DT_VOID_RETURN_MARK_DECL(GetStringRegion); | |
2576 | |
2577 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) | |
2578 JNIWrapper("GetStringRegion"); | |
2579 DTRACE_PROBE5(hotspot_jni, GetStringRegion__entry, env, string, start, len, buf); | |
2580 DT_VOID_RETURN_MARK(GetStringRegion); | |
2581 oop s = JNIHandles::resolve_non_null(string); | |
2582 int s_len = java_lang_String::length(s); | |
2583 if (start < 0 || len < 0 || start + len > s_len) { | |
2584 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); | |
2585 } else { | |
2586 if (len > 0) { | |
2587 int s_offset = java_lang_String::offset(s); | |
2588 typeArrayOop s_value = java_lang_String::value(s); | |
2589 memcpy(buf, s_value->char_at_addr(s_offset+start), sizeof(jchar)*len); | |
2590 } | |
2591 } | |
2592 JNI_END | |
2593 | |
2594 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion); | |
2595 | |
2596 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) | |
2597 JNIWrapper("GetStringUTFRegion"); | |
2598 DTRACE_PROBE5(hotspot_jni, GetStringUTFRegion__entry, env, string, start, len, buf); | |
2599 DT_VOID_RETURN_MARK(GetStringUTFRegion); | |
2600 oop s = JNIHandles::resolve_non_null(string); | |
2601 int s_len = java_lang_String::length(s); | |
2602 if (start < 0 || len < 0 || start + len > s_len) { | |
2603 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); | |
2604 } else { | |
2605 //%note jni_7 | |
2606 if (len > 0) { | |
2607 ResourceMark rm(THREAD); | |
2608 char *utf_region = java_lang_String::as_utf8_string(s, start, len); | |
2609 int utf_len = (int)strlen(utf_region); | |
2610 memcpy(buf, utf_region, utf_len); | |
2611 buf[utf_len] = 0; | |
2612 } else { | |
2613 // JDK null-terminates the buffer even in len is zero | |
2614 if (buf != NULL) { | |
2615 buf[0] = 0; | |
2616 } | |
2617 } | |
2618 } | |
2619 JNI_END | |
2620 | |
2621 | |
2622 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) | |
2623 JNIWrapper("GetPrimitiveArrayCritical"); | |
2624 DTRACE_PROBE3(hotspot_jni, GetPrimitiveArrayCritical__entry, env, array, isCopy); | |
2625 GC_locker::lock_critical(thread); | |
2626 if (isCopy != NULL) { | |
2627 *isCopy = JNI_FALSE; | |
2628 } | |
2629 oop a = JNIHandles::resolve_non_null(array); | |
2630 assert(a->is_array(), "just checking"); | |
2631 BasicType type; | |
2632 if (a->is_objArray()) { | |
2633 type = T_OBJECT; | |
2634 } else { | |
2635 type = typeArrayKlass::cast(a->klass())->element_type(); | |
2636 } | |
2637 void* ret = arrayOop(a)->base(type); | |
2638 DTRACE_PROBE1(hotspot_jni, GetPrimitiveArrayCritical__return, ret); | |
2639 return ret; | |
2640 JNI_END | |
2641 | |
2642 | |
2643 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) | |
2644 JNIWrapper("ReleasePrimitiveArrayCritical"); | |
2645 DTRACE_PROBE4(hotspot_jni, ReleasePrimitiveArrayCritical__entry, env, array, carray, mode); | |
2646 // The array, carray and mode arguments are ignored | |
2647 GC_locker::unlock_critical(thread); | |
2648 DTRACE_PROBE(hotspot_jni, ReleasePrimitiveArrayCritical__return); | |
2649 JNI_END | |
2650 | |
2651 | |
2652 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) | |
2653 JNIWrapper("GetStringCritical"); | |
2654 DTRACE_PROBE3(hotspot_jni, GetStringCritical__entry, env, string, isCopy); | |
2655 GC_locker::lock_critical(thread); | |
2656 if (isCopy != NULL) { | |
2657 *isCopy = JNI_FALSE; | |
2658 } | |
2659 oop s = JNIHandles::resolve_non_null(string); | |
2660 int s_len = java_lang_String::length(s); | |
2661 typeArrayOop s_value = java_lang_String::value(s); | |
2662 int s_offset = java_lang_String::offset(s); | |
2663 const jchar* ret; | |
2664 if (s_len > 0) { | |
2665 ret = s_value->char_at_addr(s_offset); | |
2666 } else { | |
2667 ret = (jchar*) s_value->base(T_CHAR); | |
2668 } | |
2669 DTRACE_PROBE1(hotspot_jni, GetStringCritical__return, ret); | |
2670 return ret; | |
2671 JNI_END | |
2672 | |
2673 | |
2674 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars)) | |
2675 JNIWrapper("ReleaseStringCritical"); | |
2676 DTRACE_PROBE3(hotspot_jni, ReleaseStringCritical__entry, env, str, chars); | |
2677 // The str and chars arguments are ignored | |
2678 GC_locker::unlock_critical(thread); | |
2679 DTRACE_PROBE(hotspot_jni, ReleaseStringCritical__return); | |
2680 JNI_END | |
2681 | |
2682 | |
2683 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref)) | |
2684 JNIWrapper("jni_NewWeakGlobalRef"); | |
2685 DTRACE_PROBE2(hotspot_jni, NewWeakGlobalRef__entry, env, ref); | |
2686 Handle ref_handle(thread, JNIHandles::resolve(ref)); | |
2687 jweak ret = JNIHandles::make_weak_global(ref_handle); | |
2688 DTRACE_PROBE1(hotspot_jni, NewWeakGlobalRef__return, ret); | |
2689 return ret; | |
2690 JNI_END | |
2691 | |
2692 // Must be JNI_ENTRY (with HandleMark) | |
2693 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref)) | |
2694 JNIWrapper("jni_DeleteWeakGlobalRef"); | |
2695 DTRACE_PROBE2(hotspot_jni, DeleteWeakGlobalRef__entry, env, ref); | |
2696 JNIHandles::destroy_weak_global(ref); | |
2697 DTRACE_PROBE(hotspot_jni, DeleteWeakGlobalRef__return); | |
2698 JNI_END | |
2699 | |
2700 | |
2701 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env)) | |
2702 JNIWrapper("jni_ExceptionCheck"); | |
2703 DTRACE_PROBE1(hotspot_jni, ExceptionCheck__entry, env); | |
2704 jni_check_async_exceptions(thread); | |
2705 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE; | |
2706 DTRACE_PROBE1(hotspot_jni, ExceptionCheck__return, ret); | |
2707 return ret; | |
2708 JNI_END | |
2709 | |
2710 | |
2711 // Initialization state for three routines below relating to | |
2712 // java.nio.DirectBuffers | |
2713 static jint directBufferSupportInitializeStarted = 0; | |
2714 static volatile jint directBufferSupportInitializeEnded = 0; | |
2715 static volatile jint directBufferSupportInitializeFailed = 0; | |
2716 static jclass bufferClass = NULL; | |
2717 static jclass directBufferClass = NULL; | |
2718 static jclass directByteBufferClass = NULL; | |
2719 static jmethodID directByteBufferConstructor = NULL; | |
2720 static jfieldID directBufferAddressField = NULL; | |
2721 static jfieldID bufferCapacityField = NULL; | |
2722 | |
2723 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) { | |
2724 Handle loader; // null (bootstrap) loader | |
2725 Handle protection_domain; // null protection domain | |
2726 | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1989
diff
changeset
|
2727 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); |
657
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
2728 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); |
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
2729 |
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
2730 if (TraceClassResolution && result != NULL) { |
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
2731 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); |
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
2732 } |
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
2733 return result; |
0 | 2734 } |
2735 | |
2736 // These lookups are done with the NULL (bootstrap) ClassLoader to | |
2737 // circumvent any security checks that would be done by jni_FindClass. | |
2738 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env)) | |
2739 { | |
2740 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; } | |
2741 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; } | |
2742 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; } | |
2743 return true; | |
2744 } | |
2745 JNI_END | |
2746 | |
2747 | |
2748 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) { | |
2749 if (directBufferSupportInitializeFailed) { | |
2750 return false; | |
2751 } | |
2752 | |
2753 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) { | |
2754 if (!lookupDirectBufferClasses(env)) { | |
2755 directBufferSupportInitializeFailed = 1; | |
2756 return false; | |
2757 } | |
2758 | |
2759 // Make global references for these | |
2760 bufferClass = (jclass) env->NewGlobalRef(bufferClass); | |
2761 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass); | |
2762 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass); | |
2763 | |
2764 // Get needed field and method IDs | |
2765 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V"); | |
2766 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J"); | |
2767 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I"); | |
2768 | |
2769 if ((directByteBufferConstructor == NULL) || | |
2770 (directBufferAddressField == NULL) || | |
2771 (bufferCapacityField == NULL)) { | |
2772 directBufferSupportInitializeFailed = 1; | |
2773 return false; | |
2774 } | |
2775 | |
2776 directBufferSupportInitializeEnded = 1; | |
2777 } else { | |
2778 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { | |
521
4db4e58c16bd
6791815: Fix for 6471657 can cause deadlock on non-Solaris platforms when initializing direct buffer support
xlu
parents:
477
diff
changeset
|
2779 // Set state as yield_all can call os:sleep. On Solaris, yield_all calls |
4db4e58c16bd
6791815: Fix for 6471657 can cause deadlock on non-Solaris platforms when initializing direct buffer support
xlu
parents:
477
diff
changeset
|
2780 // os::sleep which requires the VM state transition. On other platforms, it |
4db4e58c16bd
6791815: Fix for 6471657 can cause deadlock on non-Solaris platforms when initializing direct buffer support
xlu
parents:
477
diff
changeset
|
2781 // is not necessary. The following call to change the VM state is purposely |
4db4e58c16bd
6791815: Fix for 6471657 can cause deadlock on non-Solaris platforms when initializing direct buffer support
xlu
parents:
477
diff
changeset
|
2782 // put inside the loop to avoid potential deadlock when multiple threads |
4db4e58c16bd
6791815: Fix for 6471657 can cause deadlock on non-Solaris platforms when initializing direct buffer support
xlu
parents:
477
diff
changeset
|
2783 // try to call this method. See 6791815 for more details. |
4db4e58c16bd
6791815: Fix for 6471657 can cause deadlock on non-Solaris platforms when initializing direct buffer support
xlu
parents:
477
diff
changeset
|
2784 ThreadInVMfromNative tivn(thread); |
0 | 2785 os::yield_all(); |
2786 } | |
2787 } | |
2788 | |
2789 return !directBufferSupportInitializeFailed; | |
2790 } | |
2791 | |
2792 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity) | |
2793 { | |
2794 // thread_from_jni_environment() will block if VM is gone. | |
2795 JavaThread* thread = JavaThread::thread_from_jni_environment(env); | |
2796 | |
2797 JNIWrapper("jni_NewDirectByteBuffer"); | |
2798 DTRACE_PROBE3(hotspot_jni, NewDirectByteBuffer__entry, env, address, capacity); | |
2799 | |
2800 if (!directBufferSupportInitializeEnded) { | |
2801 if (!initializeDirectBufferSupport(env, thread)) { | |
2802 DTRACE_PROBE1(hotspot_jni, NewDirectByteBuffer__return, NULL); | |
2803 return NULL; | |
2804 } | |
2805 } | |
2806 | |
2807 // Being paranoid about accidental sign extension on address | |
2808 jlong addr = (jlong) ((uintptr_t) address); | |
2809 // NOTE that package-private DirectByteBuffer constructor currently | |
2810 // takes int capacity | |
2811 jint cap = (jint) capacity; | |
2812 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap); | |
2813 DTRACE_PROBE1(hotspot_jni, NewDirectByteBuffer__return, ret); | |
2814 return ret; | |
2815 } | |
2816 | |
2817 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*); | |
2818 | |
2819 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf) | |
2820 { | |
2821 // thread_from_jni_environment() will block if VM is gone. | |
2822 JavaThread* thread = JavaThread::thread_from_jni_environment(env); | |
2823 | |
2824 JNIWrapper("jni_GetDirectBufferAddress"); | |
2825 DTRACE_PROBE2(hotspot_jni, GetDirectBufferAddress__entry, env, buf); | |
2826 void* ret = NULL; | |
2827 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret); | |
2828 | |
2829 if (!directBufferSupportInitializeEnded) { | |
2830 if (!initializeDirectBufferSupport(env, thread)) { | |
2831 return 0; | |
2832 } | |
2833 } | |
2834 | |
2835 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) { | |
2836 return 0; | |
2837 } | |
2838 | |
2839 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField); | |
2840 return ret; | |
2841 } | |
2842 | |
2843 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong); | |
2844 | |
2845 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf) | |
2846 { | |
2847 // thread_from_jni_environment() will block if VM is gone. | |
2848 JavaThread* thread = JavaThread::thread_from_jni_environment(env); | |
2849 | |
2850 JNIWrapper("jni_GetDirectBufferCapacity"); | |
2851 DTRACE_PROBE2(hotspot_jni, GetDirectBufferCapacity__entry, env, buf); | |
2852 jlong ret = -1; | |
2853 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret); | |
2854 | |
2855 if (!directBufferSupportInitializeEnded) { | |
2856 if (!initializeDirectBufferSupport(env, thread)) { | |
2857 ret = 0; | |
2858 return ret; | |
2859 } | |
2860 } | |
2861 | |
2862 if (buf == NULL) { | |
2863 return -1; | |
2864 } | |
2865 | |
2866 if (!env->IsInstanceOf(buf, directBufferClass)) { | |
2867 return -1; | |
2868 } | |
2869 | |
2870 // NOTE that capacity is currently an int in the implementation | |
2871 ret = env->GetIntField(buf, bufferCapacityField); | |
2872 return ret; | |
2873 } | |
2874 | |
2875 | |
2876 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env)) | |
2877 JNIWrapper("GetVersion"); | |
2878 DTRACE_PROBE1(hotspot_jni, GetVersion__entry, env); | |
2879 DTRACE_PROBE1(hotspot_jni, GetVersion__return, CurrentVersion); | |
2880 return CurrentVersion; | |
2881 JNI_END | |
2882 | |
2883 extern struct JavaVM_ main_vm; | |
2884 | |
2885 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm)) | |
2886 JNIWrapper("jni_GetJavaVM"); | |
2887 DTRACE_PROBE2(hotspot_jni, GetJavaVM__entry, env, vm); | |
2888 *vm = (JavaVM *)(&main_vm); | |
2889 DTRACE_PROBE1(hotspot_jni, GetJavaVM__return, JNI_OK); | |
2890 return JNI_OK; | |
2891 JNI_END | |
2892 | |
2893 // Structure containing all jni functions | |
2894 struct JNINativeInterface_ jni_NativeInterface = { | |
2895 NULL, | |
2896 NULL, | |
2897 NULL, | |
2898 | |
2899 NULL, | |
2900 | |
2901 jni_GetVersion, | |
2902 | |
2903 jni_DefineClass, | |
2904 jni_FindClass, | |
2905 | |
2906 jni_FromReflectedMethod, | |
2907 jni_FromReflectedField, | |
2908 | |
2909 jni_ToReflectedMethod, | |
2910 | |
2911 jni_GetSuperclass, | |
2912 jni_IsAssignableFrom, | |
2913 | |
2914 jni_ToReflectedField, | |
2915 | |
2916 jni_Throw, | |
2917 jni_ThrowNew, | |
2918 jni_ExceptionOccurred, | |
2919 jni_ExceptionDescribe, | |
2920 jni_ExceptionClear, | |
2921 jni_FatalError, | |
2922 | |
2923 jni_PushLocalFrame, | |
2924 jni_PopLocalFrame, | |
2925 | |
2926 jni_NewGlobalRef, | |
2927 jni_DeleteGlobalRef, | |
2928 jni_DeleteLocalRef, | |
2929 jni_IsSameObject, | |
2930 | |
2931 jni_NewLocalRef, | |
2932 jni_EnsureLocalCapacity, | |
2933 | |
2934 jni_AllocObject, | |
2935 jni_NewObject, | |
2936 jni_NewObjectV, | |
2937 jni_NewObjectA, | |
2938 | |
2939 jni_GetObjectClass, | |
2940 jni_IsInstanceOf, | |
2941 | |
2942 jni_GetMethodID, | |
2943 | |
2944 jni_CallObjectMethod, | |
2945 jni_CallObjectMethodV, | |
2946 jni_CallObjectMethodA, | |
2947 jni_CallBooleanMethod, | |
2948 jni_CallBooleanMethodV, | |
2949 jni_CallBooleanMethodA, | |
2950 jni_CallByteMethod, | |
2951 jni_CallByteMethodV, | |
2952 jni_CallByteMethodA, | |
2953 jni_CallCharMethod, | |
2954 jni_CallCharMethodV, | |
2955 jni_CallCharMethodA, | |
2956 jni_CallShortMethod, | |
2957 jni_CallShortMethodV, | |
2958 jni_CallShortMethodA, | |
2959 jni_CallIntMethod, | |
2960 jni_CallIntMethodV, | |
2961 jni_CallIntMethodA, | |
2962 jni_CallLongMethod, | |
2963 jni_CallLongMethodV, | |
2964 jni_CallLongMethodA, | |
2965 jni_CallFloatMethod, | |
2966 jni_CallFloatMethodV, | |
2967 jni_CallFloatMethodA, | |
2968 jni_CallDoubleMethod, | |
2969 jni_CallDoubleMethodV, | |
2970 jni_CallDoubleMethodA, | |
2971 jni_CallVoidMethod, | |
2972 jni_CallVoidMethodV, | |
2973 jni_CallVoidMethodA, | |
2974 | |
2975 jni_CallNonvirtualObjectMethod, | |
2976 jni_CallNonvirtualObjectMethodV, | |
2977 jni_CallNonvirtualObjectMethodA, | |
2978 jni_CallNonvirtualBooleanMethod, | |
2979 jni_CallNonvirtualBooleanMethodV, | |
2980 jni_CallNonvirtualBooleanMethodA, | |
2981 jni_CallNonvirtualByteMethod, | |
2982 jni_CallNonvirtualByteMethodV, | |
2983 jni_CallNonvirtualByteMethodA, | |
2984 jni_CallNonvirtualCharMethod, | |
2985 jni_CallNonvirtualCharMethodV, | |
2986 jni_CallNonvirtualCharMethodA, | |
2987 jni_CallNonvirtualShortMethod, | |
2988 jni_CallNonvirtualShortMethodV, | |
2989 jni_CallNonvirtualShortMethodA, | |
2990 jni_CallNonvirtualIntMethod, | |
2991 jni_CallNonvirtualIntMethodV, | |
2992 jni_CallNonvirtualIntMethodA, | |
2993 jni_CallNonvirtualLongMethod, | |
2994 jni_CallNonvirtualLongMethodV, | |
2995 jni_CallNonvirtualLongMethodA, | |
2996 jni_CallNonvirtualFloatMethod, | |
2997 jni_CallNonvirtualFloatMethodV, | |
2998 jni_CallNonvirtualFloatMethodA, | |
2999 jni_CallNonvirtualDoubleMethod, | |
3000 jni_CallNonvirtualDoubleMethodV, | |
3001 jni_CallNonvirtualDoubleMethodA, | |
3002 jni_CallNonvirtualVoidMethod, | |
3003 jni_CallNonvirtualVoidMethodV, | |
3004 jni_CallNonvirtualVoidMethodA, | |
3005 | |
3006 jni_GetFieldID, | |
3007 | |
3008 jni_GetObjectField, | |
3009 jni_GetBooleanField, | |
3010 jni_GetByteField, | |
3011 jni_GetCharField, | |
3012 jni_GetShortField, | |
3013 jni_GetIntField, | |
3014 jni_GetLongField, | |
3015 jni_GetFloatField, | |
3016 jni_GetDoubleField, | |
3017 | |
3018 jni_SetObjectField, | |
3019 jni_SetBooleanField, | |
3020 jni_SetByteField, | |
3021 jni_SetCharField, | |
3022 jni_SetShortField, | |
3023 jni_SetIntField, | |
3024 jni_SetLongField, | |
3025 jni_SetFloatField, | |
3026 jni_SetDoubleField, | |
3027 | |
3028 jni_GetStaticMethodID, | |
3029 | |
3030 jni_CallStaticObjectMethod, | |
3031 jni_CallStaticObjectMethodV, | |
3032 jni_CallStaticObjectMethodA, | |
3033 jni_CallStaticBooleanMethod, | |
3034 jni_CallStaticBooleanMethodV, | |
3035 jni_CallStaticBooleanMethodA, | |
3036 jni_CallStaticByteMethod, | |
3037 jni_CallStaticByteMethodV, | |
3038 jni_CallStaticByteMethodA, | |
3039 jni_CallStaticCharMethod, | |
3040 jni_CallStaticCharMethodV, | |
3041 jni_CallStaticCharMethodA, | |
3042 jni_CallStaticShortMethod, | |
3043 jni_CallStaticShortMethodV, | |
3044 jni_CallStaticShortMethodA, | |
3045 jni_CallStaticIntMethod, | |
3046 jni_CallStaticIntMethodV, | |
3047 jni_CallStaticIntMethodA, | |
3048 jni_CallStaticLongMethod, | |
3049 jni_CallStaticLongMethodV, | |
3050 jni_CallStaticLongMethodA, | |
3051 jni_CallStaticFloatMethod, | |
3052 jni_CallStaticFloatMethodV, | |
3053 jni_CallStaticFloatMethodA, | |
3054 jni_CallStaticDoubleMethod, | |
3055 jni_CallStaticDoubleMethodV, | |
3056 jni_CallStaticDoubleMethodA, | |
3057 jni_CallStaticVoidMethod, | |
3058 jni_CallStaticVoidMethodV, | |
3059 jni_CallStaticVoidMethodA, | |
3060 | |
3061 jni_GetStaticFieldID, | |
3062 | |
3063 jni_GetStaticObjectField, | |
3064 jni_GetStaticBooleanField, | |
3065 jni_GetStaticByteField, | |
3066 jni_GetStaticCharField, | |
3067 jni_GetStaticShortField, | |
3068 jni_GetStaticIntField, | |
3069 jni_GetStaticLongField, | |
3070 jni_GetStaticFloatField, | |
3071 jni_GetStaticDoubleField, | |
3072 | |
3073 jni_SetStaticObjectField, | |
3074 jni_SetStaticBooleanField, | |
3075 jni_SetStaticByteField, | |
3076 jni_SetStaticCharField, | |
3077 jni_SetStaticShortField, | |
3078 jni_SetStaticIntField, | |
3079 jni_SetStaticLongField, | |
3080 jni_SetStaticFloatField, | |
3081 jni_SetStaticDoubleField, | |
3082 | |
3083 jni_NewString, | |
3084 jni_GetStringLength, | |
3085 jni_GetStringChars, | |
3086 jni_ReleaseStringChars, | |
3087 | |
3088 jni_NewStringUTF, | |
3089 jni_GetStringUTFLength, | |
3090 jni_GetStringUTFChars, | |
3091 jni_ReleaseStringUTFChars, | |
3092 | |
3093 jni_GetArrayLength, | |
3094 | |
3095 jni_NewObjectArray, | |
3096 jni_GetObjectArrayElement, | |
3097 jni_SetObjectArrayElement, | |
3098 | |
3099 jni_NewBooleanArray, | |
3100 jni_NewByteArray, | |
3101 jni_NewCharArray, | |
3102 jni_NewShortArray, | |
3103 jni_NewIntArray, | |
3104 jni_NewLongArray, | |
3105 jni_NewFloatArray, | |
3106 jni_NewDoubleArray, | |
3107 | |
3108 jni_GetBooleanArrayElements, | |
3109 jni_GetByteArrayElements, | |
3110 jni_GetCharArrayElements, | |
3111 jni_GetShortArrayElements, | |
3112 jni_GetIntArrayElements, | |
3113 jni_GetLongArrayElements, | |
3114 jni_GetFloatArrayElements, | |
3115 jni_GetDoubleArrayElements, | |
3116 | |
3117 jni_ReleaseBooleanArrayElements, | |
3118 jni_ReleaseByteArrayElements, | |
3119 jni_ReleaseCharArrayElements, | |
3120 jni_ReleaseShortArrayElements, | |
3121 jni_ReleaseIntArrayElements, | |
3122 jni_ReleaseLongArrayElements, | |
3123 jni_ReleaseFloatArrayElements, | |
3124 jni_ReleaseDoubleArrayElements, | |
3125 | |
3126 jni_GetBooleanArrayRegion, | |
3127 jni_GetByteArrayRegion, | |
3128 jni_GetCharArrayRegion, | |
3129 jni_GetShortArrayRegion, | |
3130 jni_GetIntArrayRegion, | |
3131 jni_GetLongArrayRegion, | |
3132 jni_GetFloatArrayRegion, | |
3133 jni_GetDoubleArrayRegion, | |
3134 | |
3135 jni_SetBooleanArrayRegion, | |
3136 jni_SetByteArrayRegion, | |
3137 jni_SetCharArrayRegion, | |
3138 jni_SetShortArrayRegion, | |
3139 jni_SetIntArrayRegion, | |
3140 jni_SetLongArrayRegion, | |
3141 jni_SetFloatArrayRegion, | |
3142 jni_SetDoubleArrayRegion, | |
3143 | |
3144 jni_RegisterNatives, | |
3145 jni_UnregisterNatives, | |
3146 | |
3147 jni_MonitorEnter, | |
3148 jni_MonitorExit, | |
3149 | |
3150 jni_GetJavaVM, | |
3151 | |
3152 jni_GetStringRegion, | |
3153 jni_GetStringUTFRegion, | |
3154 | |
3155 jni_GetPrimitiveArrayCritical, | |
3156 jni_ReleasePrimitiveArrayCritical, | |
3157 | |
3158 jni_GetStringCritical, | |
3159 jni_ReleaseStringCritical, | |
3160 | |
3161 jni_NewWeakGlobalRef, | |
3162 jni_DeleteWeakGlobalRef, | |
3163 | |
3164 jni_ExceptionCheck, | |
3165 | |
3166 jni_NewDirectByteBuffer, | |
3167 jni_GetDirectBufferAddress, | |
3168 jni_GetDirectBufferCapacity, | |
3169 | |
3170 // New 1_6 features | |
3171 | |
3172 jni_GetObjectRefType | |
3173 }; | |
3174 | |
3175 | |
3176 // For jvmti use to modify jni function table. | |
3177 // Java threads in native contiues to run until it is transitioned | |
3178 // to VM at safepoint. Before the transition or before it is blocked | |
3179 // for safepoint it may access jni function table. VM could crash if | |
3180 // any java thread access the jni function table in the middle of memcpy. | |
3181 // To avoid this each function pointers are copied automically. | |
3182 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) { | |
3183 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); | |
3184 intptr_t *a = (intptr_t *) jni_functions(); | |
3185 intptr_t *b = (intptr_t *) new_jni_NativeInterface; | |
3186 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) { | |
3187 Atomic::store_ptr(*b++, a++); | |
3188 } | |
3189 } | |
3190 | |
3191 void quicken_jni_functions() { | |
3192 // Replace Get<Primitive>Field with fast versions | |
3193 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access() | |
3194 && !VerifyJNIFields && !TraceJNICalls && !CountJNICalls && !CheckJNICalls | |
3195 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2) | |
3196 // windows x86 currently needs SEH wrapper and the gain of the fast | |
3197 // versions currently isn't certain for server vm on uniprocessor. | |
3198 && os::is_MP() | |
3199 #endif | |
3200 ) { | |
3201 address func; | |
3202 func = JNI_FastGetField::generate_fast_get_boolean_field(); | |
3203 if (func != (address)-1) { | |
3204 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func; | |
3205 } | |
3206 func = JNI_FastGetField::generate_fast_get_byte_field(); | |
3207 if (func != (address)-1) { | |
3208 jni_NativeInterface.GetByteField = (GetByteField_t)func; | |
3209 } | |
3210 func = JNI_FastGetField::generate_fast_get_char_field(); | |
3211 if (func != (address)-1) { | |
3212 jni_NativeInterface.GetCharField = (GetCharField_t)func; | |
3213 } | |
3214 func = JNI_FastGetField::generate_fast_get_short_field(); | |
3215 if (func != (address)-1) { | |
3216 jni_NativeInterface.GetShortField = (GetShortField_t)func; | |
3217 } | |
3218 func = JNI_FastGetField::generate_fast_get_int_field(); | |
3219 if (func != (address)-1) { | |
3220 jni_NativeInterface.GetIntField = (GetIntField_t)func; | |
3221 } | |
3222 func = JNI_FastGetField::generate_fast_get_long_field(); | |
3223 if (func != (address)-1) { | |
3224 jni_NativeInterface.GetLongField = (GetLongField_t)func; | |
3225 } | |
3226 func = JNI_FastGetField::generate_fast_get_float_field(); | |
3227 if (func != (address)-1) { | |
3228 jni_NativeInterface.GetFloatField = (GetFloatField_t)func; | |
3229 } | |
3230 func = JNI_FastGetField::generate_fast_get_double_field(); | |
3231 if (func != (address)-1) { | |
3232 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func; | |
3233 } | |
3234 } | |
3235 } | |
3236 | |
3237 // Returns the function structure | |
3238 struct JNINativeInterface_* jni_functions() { | |
3239 #ifndef JNICHECK_KERNEL | |
3240 if (CheckJNICalls) return jni_functions_check(); | |
3241 #else // JNICHECK_KERNEL | |
3242 if (CheckJNICalls) warning("-Xcheck:jni is not supported in kernel vm."); | |
3243 #endif // JNICHECK_KERNEL | |
3244 return &jni_NativeInterface; | |
3245 } | |
3246 | |
3247 // Returns the function structure | |
3248 struct JNINativeInterface_* jni_functions_nocheck() { | |
3249 return &jni_NativeInterface; | |
3250 } | |
3251 | |
3252 | |
3253 // Invocation API | |
3254 | |
3255 | |
3256 // Forward declaration | |
3257 extern const struct JNIInvokeInterface_ jni_InvokeInterface; | |
3258 | |
3259 // Global invocation API vars | |
3260 volatile jint vm_created = 0; | |
3261 // Indicate whether it is safe to recreate VM | |
3262 volatile jint safe_to_recreate_vm = 1; | |
3263 struct JavaVM_ main_vm = {&jni_InvokeInterface}; | |
3264 | |
3265 | |
3266 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */ | |
3267 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL }; | |
3268 | |
3269 HS_DTRACE_PROBE_DECL1(hotspot_jni, GetDefaultJavaVMInitArgs__entry, void*); | |
3270 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint); | |
3271 | |
3272 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) { | |
3273 HS_DTRACE_PROBE1(hotspot_jni, GetDefaultJavaVMInitArgs__entry, args_); | |
3274 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_; | |
3275 jint ret = JNI_ERR; | |
3276 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret); | |
3277 | |
3278 if (Threads::is_supported_jni_version(args->version)) { | |
3279 ret = JNI_OK; | |
3280 } | |
3281 // 1.1 style no longer supported in hotspot. | |
3282 // According the JNI spec, we should update args->version on return. | |
3283 // We also use the structure to communicate with launcher about default | |
3284 // stack size. | |
3285 if (args->version == JNI_VERSION_1_1) { | |
3286 args->version = JNI_VERSION_1_2; | |
3287 // javaStackSize is int in arguments structure | |
3288 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow"); | |
3289 args->javaStackSize = (jint)(ThreadStackSize * K); | |
3290 } | |
3291 return ret; | |
3292 } | |
3293 | |
3779 | 3294 #ifndef PRODUCT |
3295 | |
3296 #include "utilities/quickSort.hpp" | |
3297 | |
3298 void execute_internal_vm_tests() { | |
3299 if (ExecuteInternalVMTests) { | |
3300 assert(QuickSort::test_quick_sort(), "test_quick_sort failed"); | |
3301 tty->print_cr("All tests passed"); | |
3302 } | |
3303 } | |
3304 | |
3305 #endif | |
3306 | |
0 | 3307 HS_DTRACE_PROBE_DECL3(hotspot_jni, CreateJavaVM__entry, vm, penv, args); |
3308 DT_RETURN_MARK_DECL(CreateJavaVM, jint); | |
3309 | |
3310 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) { | |
3311 HS_DTRACE_PROBE3(hotspot_jni, CreateJavaVM__entry, vm, penv, args); | |
3312 | |
3313 jint result = JNI_ERR; | |
3314 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); | |
3315 | |
1078 | 3316 // We're about to use Atomic::xchg for synchronization. Some Zero |
3317 // platforms use the GCC builtin __sync_lock_test_and_set for this, | |
3318 // but __sync_lock_test_and_set is not guaranteed to do what we want | |
3319 // on all architectures. So we check it works before relying on it. | |
3320 #if defined(ZERO) && defined(ASSERT) | |
3321 { | |
3322 jint a = 0xcafebabe; | |
3323 jint b = Atomic::xchg(0xdeadbeef, &a); | |
3324 void *c = &a; | |
3325 void *d = Atomic::xchg_ptr(&b, &c); | |
1132 | 3326 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); |
1078 | 3327 assert(c == &b && d == &a, "Atomic::xchg_ptr() works"); |
3328 } | |
3329 #endif // ZERO && ASSERT | |
3330 | |
0 | 3331 // At the moment it's only possible to have one Java VM, |
3332 // since some of the runtime state is in global variables. | |
3333 | |
3334 // We cannot use our mutex locks here, since they only work on | |
3335 // Threads. We do an atomic compare and exchange to ensure only | |
3336 // one thread can call this method at a time | |
3337 | |
3338 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms | |
3339 // the add/dec implementations are dependent on whether we are running | |
3340 // on a multiprocessor, and at this stage of initialization the os::is_MP | |
3341 // function used to determine this will always return false. Atomic::xchg | |
3342 // does not have this problem. | |
3343 if (Atomic::xchg(1, &vm_created) == 1) { | |
3344 return JNI_ERR; // already created, or create attempt in progress | |
3345 } | |
3346 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) { | |
3347 return JNI_ERR; // someone tried and failed and retry not allowed. | |
3348 } | |
3349 | |
3350 assert(vm_created == 1, "vm_created is true during the creation"); | |
3351 | |
3352 /** | |
3353 * Certain errors during initialization are recoverable and do not | |
3354 * prevent this method from being called again at a later time | |
3355 * (perhaps with different arguments). However, at a certain | |
3356 * point during initialization if an error occurs we cannot allow | |
3357 * this function to be called again (or it will crash). In those | |
3358 * situations, the 'canTryAgain' flag is set to false, which atomically | |
3359 * sets safe_to_recreate_vm to 1, such that any new call to | |
3360 * JNI_CreateJavaVM will immediately fail using the above logic. | |
3361 */ | |
3362 bool can_try_again = true; | |
3363 | |
3364 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again); | |
3365 if (result == JNI_OK) { | |
3366 JavaThread *thread = JavaThread::current(); | |
3367 /* thread is thread_in_vm here */ | |
3368 *vm = (JavaVM *)(&main_vm); | |
3369 *(JNIEnv**)penv = thread->jni_environment(); | |
3370 | |
3371 // Tracks the time application was running before GC | |
3372 RuntimeService::record_application_start(); | |
3373 | |
3374 // Notify JVMTI | |
3375 if (JvmtiExport::should_post_thread_life()) { | |
3376 JvmtiExport::post_thread_start(thread); | |
3377 } | |
3378 // Check if we should compile all classes on bootclasspath | |
3379 NOT_PRODUCT(if (CompileTheWorld) ClassLoader::compile_the_world();) | |
3380 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving. | |
3381 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); | |
3382 } else { | |
3383 if (can_try_again) { | |
3384 // reset safe_to_recreate_vm to 1 so that retrial would be possible | |
3385 safe_to_recreate_vm = 1; | |
3386 } | |
3387 | |
3388 // Creation failed. We must reset vm_created | |
3389 *vm = 0; | |
3390 *(JNIEnv**)penv = 0; | |
3391 // reset vm_created last to avoid race condition. Use OrderAccess to | |
3392 // control both compiler and architectural-based reordering. | |
3393 OrderAccess::release_store(&vm_created, 0); | |
3394 } | |
3395 | |
1490
f03d0a26bf83
6888954: argument formatting for assert() and friends
jcoomes
parents:
1290
diff
changeset
|
3396 NOT_PRODUCT(test_error_handler(ErrorHandlerTest)); |
3779 | 3397 NOT_PRODUCT(execute_internal_vm_tests()); |
0 | 3398 return result; |
3399 } | |
3400 | |
3401 HS_DTRACE_PROBE_DECL3(hotspot_jni, GetCreatedJavaVMs__entry, \ | |
3402 JavaVM**, jsize, jsize*); | |
3403 HS_DTRACE_PROBE_DECL1(hotspot_jni, GetCreatedJavaVMs__return, jint); | |
3404 | |
3405 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) { | |
3406 // See bug 4367188, the wrapper can sometimes cause VM crashes | |
3407 // JNIWrapper("GetCreatedJavaVMs"); | |
3408 HS_DTRACE_PROBE3(hotspot_jni, GetCreatedJavaVMs__entry, \ | |
3409 vm_buf, bufLen, numVMs); | |
3410 if (vm_created) { | |
3411 if (numVMs != NULL) *numVMs = 1; | |
3412 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm); | |
3413 } else { | |
3414 if (numVMs != NULL) *numVMs = 0; | |
3415 } | |
3416 HS_DTRACE_PROBE1(hotspot_jni, GetCreatedJavaVMs__return, JNI_OK); | |
3417 return JNI_OK; | |
3418 } | |
3419 | |
3420 extern "C" { | |
3421 | |
3422 DT_RETURN_MARK_DECL(DestroyJavaVM, jint); | |
3423 | |
3424 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) { | |
3425 DTRACE_PROBE1(hotspot_jni, DestroyJavaVM__entry, vm); | |
3426 jint res = JNI_ERR; | |
3427 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res); | |
3428 | |
3429 if (!vm_created) { | |
3430 res = JNI_ERR; | |
3431 return res; | |
3432 } | |
3433 | |
3434 JNIWrapper("DestroyJavaVM"); | |
3435 JNIEnv *env; | |
3436 JavaVMAttachArgs destroyargs; | |
3437 destroyargs.version = CurrentVersion; | |
3438 destroyargs.name = (char *)"DestroyJavaVM"; | |
3439 destroyargs.group = NULL; | |
3440 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs); | |
3441 if (res != JNI_OK) { | |
3442 return res; | |
3443 } | |
3444 | |
3445 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering. | |
3446 JavaThread* thread = JavaThread::current(); | |
3447 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); | |
3448 if (Threads::destroy_vm()) { | |
3449 // Should not change thread state, VM is gone | |
3450 vm_created = false; | |
3451 res = JNI_OK; | |
3452 return res; | |
3453 } else { | |
3454 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); | |
3455 res = JNI_ERR; | |
3456 return res; | |
3457 } | |
3458 } | |
3459 | |
3460 | |
3461 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) { | |
3462 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args; | |
3463 | |
3464 // Check below commented out from JDK1.2fcs as well | |
3465 /* | |
3466 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) { | |
3467 return JNI_EVERSION; | |
3468 } | |
3469 */ | |
3470 | |
3471 Thread* t = ThreadLocalStorage::get_thread_slow(); | |
3472 if (t != NULL) { | |
3473 // If the thread has been attached this operation is a no-op | |
3474 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment(); | |
3475 return JNI_OK; | |
3476 } | |
3477 | |
3478 // Create a thread and mark it as attaching so it will be skipped by the | |
3479 // ThreadsListEnumerator - see CR 6404306 | |
3480 JavaThread* thread = new JavaThread(true); | |
3481 | |
3482 // Set correct safepoint info. The thread is going to call into Java when | |
3483 // initializing the Java level thread object. Hence, the correct state must | |
3484 // be set in order for the Safepoint code to deal with it correctly. | |
3485 thread->set_thread_state(_thread_in_vm); | |
3486 // Must do this before initialize_thread_local_storage | |
3487 thread->record_stack_base_and_size(); | |
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3488 |
0 | 3489 thread->initialize_thread_local_storage(); |
3490 | |
3491 if (!os::create_attached_thread(thread)) { | |
3492 delete thread; | |
3493 return JNI_ERR; | |
3494 } | |
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3495 // Enable stack overflow checks |
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3496 thread->create_stack_guard_pages(); |
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3497 |
0 | 3498 thread->initialize_tlab(); |
3499 | |
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3500 thread->cache_global_variables(); |
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3501 |
0 | 3502 // Crucial that we do not have a safepoint check for this thread, since it has |
3503 // not been added to the Thread list yet. | |
3504 { Threads_lock->lock_without_safepoint_check(); | |
3505 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to | |
3506 // avoid this thread trying to do a GC before it is added to the thread-list | |
3507 thread->set_active_handles(JNIHandleBlock::allocate_block()); | |
3508 Threads::add(thread, daemon); | |
3509 Threads_lock->unlock(); | |
3510 } | |
3511 // Create thread group and name info from attach arguments | |
3512 oop group = NULL; | |
3513 char* thread_name = NULL; | |
3514 if (args != NULL && Threads::is_supported_jni_version(args->version)) { | |
3515 group = JNIHandles::resolve(args->group); | |
3516 thread_name = args->name; // may be NULL | |
3517 } | |
3518 if (group == NULL) group = Universe::main_thread_group(); | |
3519 | |
3520 // Create Java level thread object and attach it to this thread | |
3521 bool attach_failed = false; | |
3522 { | |
3523 EXCEPTION_MARK; | |
3524 HandleMark hm(THREAD); | |
3525 Handle thread_group(THREAD, group); | |
3526 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD); | |
3527 if (HAS_PENDING_EXCEPTION) { | |
3528 CLEAR_PENDING_EXCEPTION; | |
3529 // cleanup outside the handle mark. | |
3530 attach_failed = true; | |
3531 } | |
3532 } | |
3533 | |
3534 if (attach_failed) { | |
3535 // Added missing cleanup | |
3536 thread->cleanup_failed_attach_current_thread(); | |
3537 return JNI_ERR; | |
3538 } | |
3539 | |
3540 // mark the thread as no longer attaching | |
3541 // this uses a fence to push the change through so we don't have | |
3542 // to regrab the threads_lock | |
3543 thread->set_attached(); | |
3544 | |
3545 // Set java thread status. | |
3546 java_lang_Thread::set_thread_status(thread->threadObj(), | |
3547 java_lang_Thread::RUNNABLE); | |
3548 | |
3549 // Notify the debugger | |
3550 if (JvmtiExport::should_post_thread_life()) { | |
3551 JvmtiExport::post_thread_start(thread); | |
3552 } | |
3553 | |
3554 *(JNIEnv**)penv = thread->jni_environment(); | |
3555 | |
3556 // Now leaving the VM, so change thread_state. This is normally automatically taken care | |
3557 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by | |
3558 // using ThreadStateTransition::transition, we do a callback to the safepoint code if | |
3559 // needed. | |
3560 | |
3561 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native); | |
3562 | |
3563 // Perform any platform dependent FPU setup | |
3564 os::setup_fpu(); | |
3565 | |
3566 return JNI_OK; | |
3567 } | |
3568 | |
3569 | |
3570 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) { | |
3571 DTRACE_PROBE3(hotspot_jni, AttachCurrentThread__entry, vm, penv, _args); | |
3572 if (!vm_created) { | |
3573 DTRACE_PROBE1(hotspot_jni, AttachCurrentThread__return, JNI_ERR); | |
3574 return JNI_ERR; | |
3575 } | |
3576 | |
3577 JNIWrapper("AttachCurrentThread"); | |
3578 jint ret = attach_current_thread(vm, penv, _args, false); | |
3579 DTRACE_PROBE1(hotspot_jni, AttachCurrentThread__return, ret); | |
3580 return ret; | |
3581 } | |
3582 | |
3583 | |
3584 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) { | |
3585 DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__entry, vm); | |
3586 VM_Exit::block_if_vm_exited(); | |
3587 | |
3588 JNIWrapper("DetachCurrentThread"); | |
3589 | |
3590 // If the thread has been deattacted the operations is a no-op | |
3591 if (ThreadLocalStorage::thread() == NULL) { | |
3592 DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__return, JNI_OK); | |
3593 return JNI_OK; | |
3594 } | |
3595 | |
3596 JavaThread* thread = JavaThread::current(); | |
3597 if (thread->has_last_Java_frame()) { | |
3598 DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__return, JNI_ERR); | |
3599 // Can't detach a thread that's running java, that can't work. | |
3600 return JNI_ERR; | |
3601 } | |
3602 | |
3603 // Safepoint support. Have to do call-back to safepoint code, if in the | |
3604 // middel of a safepoint operation | |
3605 ThreadStateTransition::transition_from_native(thread, _thread_in_vm); | |
3606 | |
3607 // XXX: Note that JavaThread::exit() call below removes the guards on the | |
3608 // stack pages set up via enable_stack_{red,yellow}_zone() calls | |
3609 // above in jni_AttachCurrentThread. Unfortunately, while the setting | |
3610 // of the guards is visible in jni_AttachCurrentThread above, | |
3611 // the removal of the guards is buried below in JavaThread::exit() | |
3612 // here. The abstraction should be more symmetrically either exposed | |
3613 // or hidden (e.g. it could probably be hidden in the same | |
3614 // (platform-dependent) methods where we do alternate stack | |
3615 // maintenance work?) | |
3616 thread->exit(false, JavaThread::jni_detach); | |
3617 delete thread; | |
3618 | |
3619 DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__return, JNI_OK); | |
3620 return JNI_OK; | |
3621 } | |
3622 | |
3623 DT_RETURN_MARK_DECL(GetEnv, jint); | |
3624 | |
3625 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) { | |
3626 DTRACE_PROBE3(hotspot_jni, GetEnv__entry, vm, penv, version); | |
3627 jint ret = JNI_ERR; | |
3628 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret); | |
3629 | |
3630 if (!vm_created) { | |
3631 *penv = NULL; | |
3632 ret = JNI_EDETACHED; | |
3633 return ret; | |
3634 } | |
3635 | |
3636 if (JvmtiExport::is_jvmti_version(version)) { | |
3637 ret = JvmtiExport::get_jvmti_interface(vm, penv, version); | |
3638 return ret; | |
3639 } | |
3640 | |
3641 #ifndef JVMPI_VERSION_1 | |
3642 // need these in order to be polite about older agents | |
3643 #define JVMPI_VERSION_1 ((jint)0x10000001) | |
3644 #define JVMPI_VERSION_1_1 ((jint)0x10000002) | |
3645 #define JVMPI_VERSION_1_2 ((jint)0x10000003) | |
3646 #endif // !JVMPI_VERSION_1 | |
3647 | |
3648 Thread* thread = ThreadLocalStorage::thread(); | |
3649 if (thread != NULL && thread->is_Java_thread()) { | |
3650 if (Threads::is_supported_jni_version_including_1_1(version)) { | |
3651 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment(); | |
3652 ret = JNI_OK; | |
3653 return ret; | |
3654 | |
3655 } else if (version == JVMPI_VERSION_1 || | |
3656 version == JVMPI_VERSION_1_1 || | |
3657 version == JVMPI_VERSION_1_2) { | |
3658 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported."); | |
3659 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); | |
3660 ret = JNI_EVERSION; | |
3661 return ret; | |
3662 } else if (JvmtiExport::is_jvmdi_version(version)) { | |
3663 tty->print_cr("FATAL ERROR: JVMDI is no longer supported."); | |
3664 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI)."); | |
3665 ret = JNI_EVERSION; | |
3666 return ret; | |
3667 } else { | |
3668 *penv = NULL; | |
3669 ret = JNI_EVERSION; | |
3670 return ret; | |
3671 } | |
3672 } else { | |
3673 *penv = NULL; | |
3674 ret = JNI_EDETACHED; | |
3675 return ret; | |
3676 } | |
3677 } | |
3678 | |
3679 | |
3680 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) { | |
3681 DTRACE_PROBE3(hotspot_jni, AttachCurrentThreadAsDaemon__entry, vm, penv, _args); | |
3682 if (!vm_created) { | |
3683 DTRACE_PROBE1(hotspot_jni, AttachCurrentThreadAsDaemon__return, JNI_ERR); | |
3684 return JNI_ERR; | |
3685 } | |
3686 | |
3687 JNIWrapper("AttachCurrentThreadAsDaemon"); | |
3688 jint ret = attach_current_thread(vm, penv, _args, true); | |
3689 DTRACE_PROBE1(hotspot_jni, AttachCurrentThreadAsDaemon__return, ret); | |
3690 return ret; | |
3691 } | |
3692 | |
3693 | |
3694 } // End extern "C" | |
3695 | |
3696 const struct JNIInvokeInterface_ jni_InvokeInterface = { | |
3697 NULL, | |
3698 NULL, | |
3699 NULL, | |
3700 | |
3701 jni_DestroyJavaVM, | |
3702 jni_AttachCurrentThread, | |
3703 jni_DetachCurrentThread, | |
3704 jni_GetEnv, | |
3705 jni_AttachCurrentThreadAsDaemon | |
3706 }; |