J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1996-2005 Sun Microsystems, Inc. All Rights Reserved. |
| 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 | } |