2
|
1 |
/*
|
|
2 |
* Copyright 1996-2005 Sun Microsystems, Inc. All Rights Reserved.
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|
3 |
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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|
4 |
*
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5 |
* This code is free software; you can redistribute it and/or modify it
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|
6 |
* under the terms of the GNU General Public License version 2 only, as
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|
7 |
* published by the Free Software Foundation. Sun designates this
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|
8 |
* particular file as subject to the "Classpath" exception as provided
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|
9 |
* by Sun in the LICENSE file that accompanied this code.
|
|
10 |
*
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|
11 |
* This code is distributed in the hope that it will be useful, but WITHOUT
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|
12 |
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
13 |
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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|
14 |
* version 2 for more details (a copy is included in the LICENSE file that
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|
15 |
* accompanied this code).
|
|
16 |
*
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|
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 |
*
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|
21 |
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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|
22 |
* CA 95054 USA or visit www.sun.com if you need additional information or
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|
23 |
* have any questions.
|
|
24 |
*/
|
|
25 |
|
|
26 |
#include <stdlib.h>
|
|
27 |
#include <assert.h>
|
|
28 |
|
|
29 |
#include "jni.h"
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|
30 |
#include "jni_util.h"
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|
31 |
#include "jlong.h"
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|
32 |
#include "jvm.h"
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|
33 |
#include "java_lang_ClassLoader.h"
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|
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[] = {
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|
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 |
{
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|
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*
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|
54 |
getUTF(JNIEnv *env, jstring str, char* localBuf, int bufSize)
|
|
55 |
{
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|
56 |
char* utfStr = NULL;
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|
57 |
|
|
58 |
int len = (*env)->GetStringUTFLength(env, str);
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|
59 |
int unicode_len = (*env)->GetStringLength(env, str);
|
|
60 |
if (len >= bufSize) {
|
|
61 |
utfStr = malloc(len + 1);
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|
62 |
if (utfStr == NULL) {
|
|
63 |
JNU_ThrowOutOfMemoryError(env, NULL);
|
|
64 |
return NULL;
|
|
65 |
}
|
|
66 |
} else {
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|
67 |
utfStr = localBuf;
|
|
68 |
}
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|
69 |
(*env)->GetStringUTFRegion(env, str, 0, unicode_len, utfStr);
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|
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,
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|
79 |
jstring name,
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|
80 |
jbyteArray data,
|
|
81 |
jint offset,
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82 |
jint length,
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|
83 |
jobject pd)
|
|
84 |
{
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|
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,
|
|
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jint length,
|
|
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jobject pd,
|
|
97 |
jstring source)
|
|
98 |
{
|
|
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jbyte *body;
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|
100 |
char *utfName;
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|
101 |
jclass result = 0;
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|
102 |
char buf[128];
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|
103 |
char* utfSource;
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|
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);
|
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127 |
|
|
128 |
if ((*env)->ExceptionOccurred(env))
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|
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goto free_body;
|
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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 |
}
|