author | valeriep |
Mon, 06 Apr 2009 18:46:20 -0700 | |
changeset 2448 | 1e8128f3ff61 |
parent 2 | 90ce3da70b43 |
child 3833 | b666ed188811 |
permissions | -rw-r--r-- |
2 | 1 |
/* |
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1e8128f3ff61
4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents:
2
diff
changeset
|
2 |
* Copyright 1996-2009 Sun Microsystems, Inc. All Rights Reserved. |
2 | 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. Sun designates this |
|
8 |
* particular file as subject to the "Classpath" exception as provided |
|
9 |
* by Sun in the LICENSE file that accompanied this code. |
|
10 |
* |
|
11 |
* This code is distributed in the hope that it will be useful, but WITHOUT |
|
12 |
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
|
13 |
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
|
14 |
* version 2 for more details (a copy is included in the LICENSE file that |
|
15 |
* accompanied this code). |
|
16 |
* |
|
17 |
* You should have received a copy of the GNU General Public License version |
|
18 |
* 2 along with this work; if not, write to the Free Software Foundation, |
|
19 |
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
|
20 |
* |
|
21 |
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
|
22 |
* CA 95054 USA or visit www.sun.com if you need additional information or |
|
23 |
* have any questions. |
|
24 |
*/ |
|
25 |
||
26 |
#include <stdlib.h> |
|
27 |
#include <assert.h> |
|
28 |
||
29 |
#include "jni.h" |
|
30 |
#include "jni_util.h" |
|
31 |
#include "jlong.h" |
|
32 |
#include "jvm.h" |
|
33 |
#include "java_lang_ClassLoader.h" |
|
34 |
#include "java_lang_ClassLoader_NativeLibrary.h" |
|
35 |
||
36 |
/* defined in libverify.so/verify.dll (src file common/check_format.c) */ |
|
37 |
extern jboolean VerifyClassname(char *utf_name, jboolean arrayAllowed); |
|
38 |
extern jboolean VerifyFixClassname(char *utf_name); |
|
39 |
||
40 |
static JNINativeMethod methods[] = { |
|
41 |
{"retrieveDirectives", "()Ljava/lang/AssertionStatusDirectives;", (void *)&JVM_AssertionStatusDirectives} |
|
42 |
}; |
|
43 |
||
44 |
JNIEXPORT void JNICALL |
|
45 |
Java_java_lang_ClassLoader_registerNatives(JNIEnv *env, jclass cls) |
|
46 |
{ |
|
47 |
(*env)->RegisterNatives(env, cls, methods, |
|
48 |
sizeof(methods)/sizeof(JNINativeMethod)); |
|
49 |
} |
|
50 |
||
51 |
/* Convert java string to UTF char*. Use local buffer if possible, |
|
52 |
otherwise malloc new memory. Returns null IFF malloc failed. */ |
|
53 |
static char* |
|
54 |
getUTF(JNIEnv *env, jstring str, char* localBuf, int bufSize) |
|
55 |
{ |
|
56 |
char* utfStr = NULL; |
|
57 |
||
58 |
int len = (*env)->GetStringUTFLength(env, str); |
|
59 |
int unicode_len = (*env)->GetStringLength(env, str); |
|
60 |
if (len >= bufSize) { |
|
61 |
utfStr = malloc(len + 1); |
|
62 |
if (utfStr == NULL) { |
|
63 |
JNU_ThrowOutOfMemoryError(env, NULL); |
|
64 |
return NULL; |
|
65 |
} |
|
66 |
} else { |
|
67 |
utfStr = localBuf; |
|
68 |
} |
|
69 |
(*env)->GetStringUTFRegion(env, str, 0, unicode_len, utfStr); |
|
70 |
||
71 |
return utfStr; |
|
72 |
} |
|
73 |
||
74 |
// The existence or signature of this method is not guaranteed since it |
|
75 |
// supports a private method. This method will be changed in 1.7. |
|
76 |
JNIEXPORT jclass JNICALL |
|
77 |
Java_java_lang_ClassLoader_defineClass0(JNIEnv *env, |
|
78 |
jobject loader, |
|
79 |
jstring name, |
|
80 |
jbyteArray data, |
|
81 |
jint offset, |
|
82 |
jint length, |
|
83 |
jobject pd) |
|
84 |
{ |
|
85 |
return Java_java_lang_ClassLoader_defineClass1(env, loader, name, data, offset, |
|
86 |
length, pd, NULL); |
|
87 |
} |
|
88 |
||
89 |
JNIEXPORT jclass JNICALL |
|
90 |
Java_java_lang_ClassLoader_defineClass1(JNIEnv *env, |
|
91 |
jobject loader, |
|
92 |
jstring name, |
|
93 |
jbyteArray data, |
|
94 |
jint offset, |
|
95 |
jint length, |
|
96 |
jobject pd, |
|
97 |
jstring source) |
|
98 |
{ |
|
99 |
jbyte *body; |
|
100 |
char *utfName; |
|
101 |
jclass result = 0; |
|
102 |
char buf[128]; |
|
103 |
char* utfSource; |
|
104 |
char sourceBuf[1024]; |
|
105 |
||
106 |
if (data == NULL) { |
|
107 |
JNU_ThrowNullPointerException(env, 0); |
|
108 |
return 0; |
|
109 |
} |
|
110 |
||
111 |
/* Work around 4153825. malloc crashes on Solaris when passed a |
|
112 |
* negative size. |
|
113 |
*/ |
|
114 |
if (length < 0) { |
|
115 |
JNU_ThrowArrayIndexOutOfBoundsException(env, 0); |
|
116 |
return 0; |
|
117 |
} |
|
118 |
||
119 |
body = (jbyte *)malloc(length); |
|
120 |
||
121 |
if (body == 0) { |
|
122 |
JNU_ThrowOutOfMemoryError(env, 0); |
|
123 |
return 0; |
|
124 |
} |
|
125 |
||
126 |
(*env)->GetByteArrayRegion(env, data, offset, length, body); |
|
127 |
||
128 |
if ((*env)->ExceptionOccurred(env)) |
|
129 |
goto free_body; |
|
130 |
||
131 |
if (name != NULL) { |
|
132 |
utfName = getUTF(env, name, buf, sizeof(buf)); |
|
133 |
if (utfName == NULL) { |
|
134 |
JNU_ThrowOutOfMemoryError(env, NULL); |
|
135 |
goto free_body; |
|
136 |
} |
|
137 |
VerifyFixClassname(utfName); |
|
138 |
} else { |
|
139 |
utfName = NULL; |
|
140 |
} |
|
141 |
||
142 |
if (source != NULL) { |
|
143 |
utfSource = getUTF(env, source, sourceBuf, sizeof(sourceBuf)); |
|
144 |
if (utfSource == NULL) { |
|
145 |
JNU_ThrowOutOfMemoryError(env, NULL); |
|
146 |
goto free_utfName; |
|
147 |
} |
|
148 |
} else { |
|
149 |
utfSource = NULL; |
|
150 |
} |
|
151 |
result = JVM_DefineClassWithSource(env, utfName, loader, body, length, pd, utfSource); |
|
152 |
||
153 |
if (utfSource && utfSource != sourceBuf) |
|
154 |
free(utfSource); |
|
155 |
||
156 |
free_utfName: |
|
157 |
if (utfName && utfName != buf) |
|
158 |
free(utfName); |
|
159 |
||
160 |
free_body: |
|
161 |
free(body); |
|
162 |
return result; |
|
163 |
} |
|
164 |
||
165 |
JNIEXPORT jclass JNICALL |
|
166 |
Java_java_lang_ClassLoader_defineClass2(JNIEnv *env, |
|
167 |
jobject loader, |
|
168 |
jstring name, |
|
169 |
jobject data, |
|
170 |
jint offset, |
|
171 |
jint length, |
|
172 |
jobject pd, |
|
173 |
jstring source) |
|
174 |
{ |
|
175 |
jbyte *body; |
|
176 |
char *utfName; |
|
177 |
jclass result = 0; |
|
178 |
char buf[128]; |
|
179 |
char* utfSource; |
|
180 |
char sourceBuf[1024]; |
|
181 |
||
182 |
assert(data != NULL); // caller fails if data is null. |
|
183 |
assert(length >= 0); // caller passes ByteBuffer.remaining() for length, so never neg. |
|
184 |
// caller passes ByteBuffer.position() for offset, and capacity() >= position() + remaining() |
|
185 |
assert((*env)->GetDirectBufferCapacity(env, data) >= (offset + length)); |
|
186 |
||
187 |
body = (*env)->GetDirectBufferAddress(env, data); |
|
188 |
||
189 |
if (body == 0) { |
|
190 |
JNU_ThrowNullPointerException(env, 0); |
|
191 |
return 0; |
|
192 |
} |
|
193 |
||
194 |
body += offset; |
|
195 |
||
196 |
if (name != NULL) { |
|
197 |
utfName = getUTF(env, name, buf, sizeof(buf)); |
|
198 |
if (utfName == NULL) { |
|
199 |
JNU_ThrowOutOfMemoryError(env, NULL); |
|
200 |
return result; |
|
201 |
} |
|
202 |
VerifyFixClassname(utfName); |
|
203 |
} else { |
|
204 |
utfName = NULL; |
|
205 |
} |
|
206 |
||
207 |
if (source != NULL) { |
|
208 |
utfSource = getUTF(env, source, sourceBuf, sizeof(sourceBuf)); |
|
209 |
if (utfSource == NULL) { |
|
210 |
JNU_ThrowOutOfMemoryError(env, NULL); |
|
211 |
goto free_utfName; |
|
212 |
} |
|
213 |
} else { |
|
214 |
utfSource = NULL; |
|
215 |
} |
|
216 |
result = JVM_DefineClassWithSource(env, utfName, loader, body, length, pd, utfSource); |
|
217 |
||
218 |
if (utfSource && utfSource != sourceBuf) |
|
219 |
free(utfSource); |
|
220 |
||
221 |
free_utfName: |
|
222 |
if (utfName && utfName != buf) |
|
223 |
free(utfName); |
|
224 |
||
225 |
return result; |
|
226 |
} |
|
227 |
||
228 |
JNIEXPORT void JNICALL |
|
229 |
Java_java_lang_ClassLoader_resolveClass0(JNIEnv *env, jobject this, |
|
230 |
jclass cls) |
|
231 |
{ |
|
232 |
if (cls == NULL) { |
|
233 |
JNU_ThrowNullPointerException(env, 0); |
|
234 |
return; |
|
235 |
} |
|
236 |
||
237 |
JVM_ResolveClass(env, cls); |
|
238 |
} |
|
239 |
||
240 |
JNIEXPORT jclass JNICALL |
|
241 |
Java_java_lang_ClassLoader_findBootstrapClass(JNIEnv *env, jobject loader, |
|
242 |
jstring classname) |
|
243 |
{ |
|
244 |
char *clname; |
|
245 |
jclass cls = 0; |
|
246 |
char buf[128]; |
|
247 |
||
248 |
if (classname == NULL) { |
|
249 |
JNU_ThrowClassNotFoundException(env, 0); |
|
250 |
return 0; |
|
251 |
} |
|
252 |
||
253 |
clname = getUTF(env, classname, buf, sizeof(buf)); |
|
254 |
if (clname == NULL) { |
|
255 |
JNU_ThrowOutOfMemoryError(env, NULL); |
|
256 |
return NULL; |
|
257 |
} |
|
258 |
VerifyFixClassname(clname); |
|
259 |
||
260 |
if (!VerifyClassname(clname, JNI_TRUE)) { /* expects slashed name */ |
|
261 |
JNU_ThrowClassNotFoundException(env, clname); |
|
262 |
goto done; |
|
263 |
} |
|
264 |
||
265 |
cls = JVM_FindClassFromClassLoader(env, clname, JNI_FALSE, 0, JNI_FALSE); |
|
266 |
||
267 |
done: |
|
268 |
if (clname != buf) { |
|
269 |
free(clname); |
|
270 |
} |
|
271 |
||
272 |
return cls; |
|
273 |
} |
|
274 |
||
275 |
JNIEXPORT jclass JNICALL |
|
276 |
Java_java_lang_ClassLoader_findLoadedClass0(JNIEnv *env, jobject loader, |
|
277 |
jstring name) |
|
278 |
{ |
|
279 |
if (name == NULL) { |
|
280 |
return 0; |
|
281 |
} else { |
|
282 |
return JVM_FindLoadedClass(env, loader, name); |
|
283 |
} |
|
284 |
} |
|
285 |
||
286 |
static jfieldID handleID; |
|
287 |
static jfieldID jniVersionID; |
|
288 |
||
289 |
static jboolean initIDs(JNIEnv *env) |
|
290 |
{ |
|
291 |
if (handleID == 0) { |
|
292 |
jclass this = |
|
293 |
(*env)->FindClass(env, "java/lang/ClassLoader$NativeLibrary"); |
|
294 |
if (this == 0) |
|
295 |
return JNI_FALSE; |
|
296 |
handleID = (*env)->GetFieldID(env, this, "handle", "J"); |
|
297 |
if (handleID == 0) |
|
298 |
return JNI_FALSE; |
|
299 |
jniVersionID = (*env)->GetFieldID(env, this, "jniVersion", "I"); |
|
300 |
if (jniVersionID == 0) |
|
301 |
return JNI_FALSE; |
|
302 |
} |
|
303 |
return JNI_TRUE; |
|
304 |
} |
|
305 |
||
306 |
typedef jint (JNICALL *JNI_OnLoad_t)(JavaVM *, void *); |
|
307 |
typedef void (JNICALL *JNI_OnUnload_t)(JavaVM *, void *); |
|
308 |
||
309 |
/* |
|
310 |
* Class: java_lang_ClassLoader_NativeLibrary |
|
311 |
* Method: load |
|
312 |
* Signature: (Ljava/lang/String;)J |
|
313 |
*/ |
|
314 |
JNIEXPORT void JNICALL |
|
315 |
Java_java_lang_ClassLoader_00024NativeLibrary_load |
|
316 |
(JNIEnv *env, jobject this, jstring name) |
|
317 |
{ |
|
318 |
const char *cname; |
|
319 |
jint jniVersion; |
|
320 |
jthrowable cause; |
|
321 |
void * handle; |
|
322 |
||
323 |
if (!initIDs(env)) |
|
324 |
return; |
|
325 |
||
326 |
cname = JNU_GetStringPlatformChars(env, name, 0); |
|
327 |
if (cname == 0) |
|
328 |
return; |
|
329 |
handle = JVM_LoadLibrary(cname); |
|
330 |
if (handle) { |
|
331 |
const char *onLoadSymbols[] = JNI_ONLOAD_SYMBOLS; |
|
332 |
JNI_OnLoad_t JNI_OnLoad; |
|
333 |
int i; |
|
334 |
for (i = 0; i < sizeof(onLoadSymbols) / sizeof(char *); i++) { |
|
335 |
JNI_OnLoad = (JNI_OnLoad_t) |
|
336 |
JVM_FindLibraryEntry(handle, onLoadSymbols[i]); |
|
337 |
if (JNI_OnLoad) { |
|
338 |
break; |
|
339 |
} |
|
340 |
} |
|
341 |
if (JNI_OnLoad) { |
|
342 |
JavaVM *jvm; |
|
343 |
(*env)->GetJavaVM(env, &jvm); |
|
344 |
jniVersion = (*JNI_OnLoad)(jvm, NULL); |
|
345 |
} else { |
|
346 |
jniVersion = 0x00010001; |
|
347 |
} |
|
348 |
||
349 |
cause = (*env)->ExceptionOccurred(env); |
|
350 |
if (cause) { |
|
351 |
(*env)->ExceptionClear(env); |
|
352 |
(*env)->Throw(env, cause); |
|
353 |
JVM_UnloadLibrary(handle); |
|
354 |
goto done; |
|
355 |
} |
|
356 |
||
357 |
if (!JVM_IsSupportedJNIVersion(jniVersion)) { |
|
358 |
char msg[256]; |
|
359 |
jio_snprintf(msg, sizeof(msg), |
|
360 |
"unsupported JNI version 0x%08X required by %s", |
|
361 |
jniVersion, cname); |
|
362 |
JNU_ThrowByName(env, "java/lang/UnsatisfiedLinkError", msg); |
|
363 |
JVM_UnloadLibrary(handle); |
|
364 |
goto done; |
|
365 |
} |
|
366 |
(*env)->SetIntField(env, this, jniVersionID, jniVersion); |
|
367 |
} else { |
|
368 |
cause = (*env)->ExceptionOccurred(env); |
|
369 |
if (cause) { |
|
370 |
(*env)->ExceptionClear(env); |
|
371 |
(*env)->SetLongField(env, this, handleID, (jlong)NULL); |
|
372 |
(*env)->Throw(env, cause); |
|
373 |
} |
|
374 |
goto done; |
|
375 |
} |
|
376 |
(*env)->SetLongField(env, this, handleID, ptr_to_jlong(handle)); |
|
377 |
||
378 |
done: |
|
379 |
JNU_ReleaseStringPlatformChars(env, name, cname); |
|
380 |
} |
|
381 |
||
382 |
/* |
|
383 |
* Class: java_lang_ClassLoader_NativeLibrary |
|
384 |
* Method: unload |
|
385 |
* Signature: ()V |
|
386 |
*/ |
|
387 |
JNIEXPORT void JNICALL |
|
388 |
Java_java_lang_ClassLoader_00024NativeLibrary_unload |
|
389 |
(JNIEnv *env, jobject this) |
|
390 |
{ |
|
391 |
const char *onUnloadSymbols[] = JNI_ONUNLOAD_SYMBOLS; |
|
392 |
void *handle; |
|
393 |
JNI_OnUnload_t JNI_OnUnload; |
|
394 |
int i; |
|
395 |
||
396 |
if (!initIDs(env)) |
|
397 |
return; |
|
398 |
||
399 |
handle = jlong_to_ptr((*env)->GetLongField(env, this, handleID)); |
|
400 |
for (i = 0; i < sizeof(onUnloadSymbols) / sizeof(char *); i++) { |
|
401 |
JNI_OnUnload = (JNI_OnUnload_t ) |
|
402 |
JVM_FindLibraryEntry(handle, onUnloadSymbols[i]); |
|
403 |
if (JNI_OnUnload) { |
|
404 |
break; |
|
405 |
} |
|
406 |
} |
|
407 |
||
408 |
if (JNI_OnUnload) { |
|
409 |
JavaVM *jvm; |
|
410 |
(*env)->GetJavaVM(env, &jvm); |
|
411 |
(*JNI_OnUnload)(jvm, NULL); |
|
412 |
} |
|
413 |
JVM_UnloadLibrary(handle); |
|
414 |
} |
|
415 |
||
416 |
/* |
|
417 |
* Class: java_lang_ClassLoader_NativeLibrary |
|
418 |
* Method: find |
|
419 |
* Signature: (Ljava/lang/String;J)J |
|
420 |
*/ |
|
421 |
JNIEXPORT jlong JNICALL |
|
422 |
Java_java_lang_ClassLoader_00024NativeLibrary_find |
|
423 |
(JNIEnv *env, jobject this, jstring name) |
|
424 |
{ |
|
425 |
jlong handle; |
|
426 |
const char *cname; |
|
427 |
jlong res; |
|
428 |
||
429 |
if (!initIDs(env)) |
|
430 |
return jlong_zero; |
|
431 |
||
432 |
handle = (*env)->GetLongField(env, this, handleID); |
|
433 |
cname = (*env)->GetStringUTFChars(env, name, 0); |
|
434 |
if (cname == 0) |
|
435 |
return jlong_zero; |
|
436 |
res = ptr_to_jlong(JVM_FindLibraryEntry(jlong_to_ptr(handle), cname)); |
|
437 |
(*env)->ReleaseStringUTFChars(env, name, cname); |
|
438 |
return res; |
|
439 |
} |
|
2448
1e8128f3ff61
4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents:
2
diff
changeset
|
440 |
|
1e8128f3ff61
4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents:
2
diff
changeset
|
441 |
JNIEXPORT jobject JNICALL |
1e8128f3ff61
4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents:
2
diff
changeset
|
442 |
Java_java_lang_ClassLoader_getCaller(JNIEnv *env, jclass cls, jint index) |
1e8128f3ff61
4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents:
2
diff
changeset
|
443 |
{ |
1e8128f3ff61
4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents:
2
diff
changeset
|
444 |
jobjectArray jcallerStack; |
1e8128f3ff61
4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents:
2
diff
changeset
|
445 |
int len; |
1e8128f3ff61
4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents:
2
diff
changeset
|
446 |
|
1e8128f3ff61
4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents:
2
diff
changeset
|
447 |
jcallerStack = JVM_GetClassContext(env); |
1e8128f3ff61
4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents:
2
diff
changeset
|
448 |
if ((*env)->ExceptionCheck(env)) { |
1e8128f3ff61
4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents:
2
diff
changeset
|
449 |
return NULL; |
1e8128f3ff61
4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents:
2
diff
changeset
|
450 |
} |
1e8128f3ff61
4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents:
2
diff
changeset
|
451 |
len = (*env)->GetArrayLength(env, jcallerStack); |
1e8128f3ff61
4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents:
2
diff
changeset
|
452 |
if (index < len) { |
1e8128f3ff61
4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents:
2
diff
changeset
|
453 |
return (*env)->GetObjectArrayElement(env, jcallerStack, index); |
1e8128f3ff61
4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents:
2
diff
changeset
|
454 |
} |
1e8128f3ff61
4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents:
2
diff
changeset
|
455 |
return NULL; |
1e8128f3ff61
4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents:
2
diff
changeset
|
456 |
} |
1e8128f3ff61
4735126: (cl) ClassLoader.loadClass locks all instances in chain when delegating
valeriep
parents:
2
diff
changeset
|
457 |