src/native/vm/gnu/java_lang_VMClassLoader.c

   1 /* src/native/vm/gnu/VMClassLoader.c
   2
   3    Copyright (C) 1996-2005, 2006, 2007 R. Grafl, A. Krall, C. Kruegel,
   4    C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
   5    E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
   6    J. Wenninger, Institut f. Computersprachen - TU Wien
   7
   8    This file is part of CACAO.
   9
  10    This program is free software; you can redistribute it and/or
  11    modify it under the terms of the GNU General Public License as
  12    published by the Free Software Foundation; either version 2, or (at
  13    your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful, but
  16    WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18    General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  23    02110-1301, USA.
  24
  25    $Id: java_lang_VMClassLoader.c 7408 2007-02-26 22:11:38Z twisti $
  26
  27 */
  28
  29
  30 #include "config.h"
  31
  32 #include <sys/stat.h>
  33
  34 #include "vm/types.h"
  35
  36 #include "mm/memory.h"
  37
  38 #include "native/jni.h"
  39 #include "native/native.h"
  40 #include "native/include/java_lang_Class.h"
  41 #include "native/include/java_lang_String.h"
  42 #include "native/include/java_security_ProtectionDomain.h"  /* required by... */
  43 #include "native/include/java_lang_ClassLoader.h"
  44 #include "native/include/java_util_Vector.h"
  45
  46 #include "native/vm/java_lang_ClassLoader.h"
  47
  48 #include "toolbox/logging.h"
  49
  50 #include "vm/builtin.h"
  51 #include "vm/exceptions.h"
  52 #include "vm/initialize.h"
  53 #include "vm/stringlocal.h"
  54 #include "vm/vm.h"
  55
  56 #include "vm/jit/asmpart.h"
  57
  58 #include "vmcore/class.h"
  59 #include "vmcore/classcache.h"
  60 #include "vmcore/linker.h"
  61 #include "vmcore/loader.h"
  62 #include "vmcore/options.h"
  63 #include "vmcore/statistics.h"
  64 #include "vmcore/suck.h"
  65 #include "vmcore/zip.h"
  66
  67 #if defined(ENABLE_JVMTI)
  68 #include "native/jvmti/cacaodbg.h"
  69 #endif
  70
  71
  72 /*
  73  * Class:     java/lang/VMClassLoader
  74  * Method:    defineClass
  75  * Signature: (Ljava/lang/ClassLoader;Ljava/lang/String;[BIILjava/security/ProtectionDomain;)Ljava/lang/Class;
  76  */
  77 JNIEXPORT java_lang_Class* JNICALL Java_java_lang_VMClassLoader_defineClass(JNIEnv *env, jclass clazz, java_lang_ClassLoader *cl, java_lang_String *name, java_bytearray *data, s4 offset, s4 len, java_security_ProtectionDomain *pd)
  78 {
  79         return _Jv_java_lang_ClassLoader_defineClass(cl, name, data, offset, len, pd);
  80 }
  81
  82
  83 /*
  84  * Class:     java/lang/VMClassLoader
  85  * Method:    getPrimitiveClass
  86  * Signature: (C)Ljava/lang/Class;
  87  */
  88 JNIEXPORT java_lang_Class* JNICALL Java_java_lang_VMClassLoader_getPrimitiveClass(JNIEnv *env, jclass clazz, s4 type)
  89 {
  90         classinfo *c;
  91         s4         index;
  92
  93         /* get primitive class */
  94
  95         switch (type) {
  96         case 'I':
  97                 index = PRIMITIVETYPE_INT;
  98                 break;
  99         case 'J':
 100                 index = PRIMITIVETYPE_LONG;
 101                 break;
 102         case 'F':
 103                 index = PRIMITIVETYPE_FLOAT;
 104                 break;
 105         case 'D':
 106                 index = PRIMITIVETYPE_DOUBLE;
 107                 break;
 108         case 'B':
 109                 index = PRIMITIVETYPE_BYTE;
 110                 break;
 111         case 'C':
 112                 index = PRIMITIVETYPE_CHAR;
 113                 break;
 114         case 'S':
 115                 index = PRIMITIVETYPE_SHORT;
 116                 break;
 117         case 'Z':
 118                 index = PRIMITIVETYPE_BOOLEAN;
 119                 break;
 120         case 'V':
 121                 index = PRIMITIVETYPE_VOID;
 122                 break;
 123         default:
 124                 exceptions_throw_noclassdeffounderror(utf_null);
 125                 c = NULL;
 126         }
 127
 128         c = primitivetype_table[index].class_primitive;
 129
 130         return (java_lang_Class *) c;
 131 }
 132
 133
 134 /*
 135  * Class:     java/lang/VMClassLoader
 136  * Method:    resolveClass
 137  * Signature: (Ljava/lang/Class;)V
 138  */
 139 JNIEXPORT void JNICALL Java_java_lang_VMClassLoader_resolveClass(JNIEnv *env, jclass clazz, java_lang_Class *c)
 140 {
 141         classinfo *ci;
 142
 143         ci = (classinfo *) c;
 144
 145         if (!ci) {
 146                 exceptions_throw_nullpointerexception();
 147                 return;
 148         }
 149
 150         /* link the class */
 151
 152         if (!(ci->state & CLASS_LINKED))
 153                 (void) link_class(ci);
 154
 155         return;
 156 }
 157
 158
 159 /*
 160  * Class:     java/lang/VMClassLoader
 161  * Method:    loadClass
 162  * Signature: (Ljava/lang/String;Z)Ljava/lang/Class;
 163  */
 164 JNIEXPORT java_lang_Class* JNICALL Java_java_lang_VMClassLoader_loadClass(JNIEnv *env, jclass clazz, java_lang_String *name, jboolean resolve)
 165 {
 166         classinfo         *c;
 167         utf               *u;
 168         java_objectheader *xptr;
 169
 170         if (name == NULL) {
 171                 exceptions_throw_nullpointerexception();
 172                 return NULL;
 173         }
 174
 175         /* create utf string in which '.' is replaced by '/' */
 176
 177         u = javastring_toutf(name, true);
 178
 179         /* load class */
 180
 181         c = load_class_bootstrap(u);
 182
 183         if (c == NULL)
 184                 goto exception;
 185
 186         /* resolve class -- if requested */
 187
 188 /*      if (resolve) */
 189                 if (!link_class(c))
 190                         goto exception;
 191
 192         return (java_lang_Class *) c;
 193
 194  exception:
 195         xptr = exceptions_get_exception();
 196
 197         c = xptr->vftbl->class;
 198
 199         /* if the exception is a NoClassDefFoundError, we replace it with a
 200            ClassNotFoundException, otherwise return the exception */
 201
 202         if (c == class_java_lang_NoClassDefFoundError) {
 203                 /* clear exceptionptr, because builtin_new checks for
 204                    ExceptionInInitializerError */
 205                 exceptions_clear_exception();
 206
 207                 exceptions_throw_classnotfoundexception(u);
 208         }
 209
 210         return NULL;
 211 }
 212
 213
 214 /*
 215  * Class:     java/lang/VMClassLoader
 216  * Method:    nativeGetResources
 217  * Signature: (Ljava/lang/String;)Ljava/util/Vector;
 218  */
 219 JNIEXPORT java_util_Vector* JNICALL Java_java_lang_VMClassLoader_nativeGetResources(JNIEnv *env, jclass clazz, java_lang_String *name)
 220 {
 221         jobject               o;         /* vector being created     */
 222         methodinfo           *m;         /* "add" method of vector   */
 223         java_lang_String     *path;      /* path to be added         */
 224         list_classpath_entry *lce;       /* classpath entry          */
 225         utf                  *utfname;   /* utf to look for          */
 226         char                 *buffer;    /* char buffer              */
 227         char                 *namestart; /* start of name to use     */
 228         char                 *tmppath;   /* temporary buffer         */
 229         s4                    namelen;   /* length of name to use    */
 230         s4                    searchlen; /* length of name to search */
 231         s4                    bufsize;   /* size of buffer allocated */
 232         s4                    pathlen;   /* name of path to assemble */
 233         struct stat           buf;       /* buffer for stat          */
 234         jboolean              ret;       /* return value of "add"    */
 235
 236         /* get the resource name as utf string */
 237
 238         utfname = javastring_toutf(name, false);
 239         if (!utfname)
 240                 return NULL;
 241
 242         /* copy it to a char buffer */
 243
 244         namelen = utf_bytes(utfname);
 245         searchlen = namelen;
 246         bufsize = namelen + strlen("0");
 247         buffer = MNEW(char, bufsize);
 248
 249         utf_copy(buffer, utfname);
 250         namestart = buffer;
 251
 252         /* skip leading '/' */
 253
 254         if (namestart[0] == '/') {
 255                 namestart++;
 256                 namelen--;
 257                 searchlen--;
 258         }
 259
 260         /* remove trailing `.class' */
 261
 262         if (namelen >= 6 && strcmp(namestart + (namelen - 6), ".class") == 0) {
 263                 searchlen -= 6;
 264         }
 265
 266         /* create a new needle to look for, if necessary */
 267
 268         if (searchlen != bufsize-1) {
 269                 utfname = utf_new(namestart, searchlen);
 270                 if (utfname == NULL)
 271                         goto return_NULL;
 272         }
 273
 274         /* new Vector() */
 275
 276         o = native_new_and_init(class_java_util_Vector);
 277
 278         if (!o)
 279                 goto return_NULL;
 280
 281         /* get Vector.add() method */
 282
 283         m = class_resolveclassmethod(class_java_util_Vector,
 284                                                                  utf_add,
 285                                                                  utf_new_char("(Ljava/lang/Object;)Z"),
 286                                                                  NULL,
 287                                                                  true);
 288
 289         if (!m)
 290                 goto return_NULL;
 291
 292         /* iterate over all classpath entries */
 293
 294         for (lce = list_first(list_classpath_entries); lce != NULL;
 295                  lce = list_next(list_classpath_entries, lce)) {
 296                 /* clear path pointer */
 297                 path = NULL;
 298
 299 #if defined(ENABLE_ZLIB)
 300                 if (lce->type == CLASSPATH_ARCHIVE) {
 301
 302                         if (zip_find(lce, utfname)) {
 303                                 pathlen = strlen("jar:file://") + lce->pathlen + strlen("!/") +
 304                                         namelen + strlen("0");
 305
 306                                 tmppath = MNEW(char, pathlen);
 307
 308                                 sprintf(tmppath, "jar:file://%s!/%s", lce->path, namestart);
 309                                 path = javastring_new_from_utf_string(tmppath),
 310
 311                                 MFREE(tmppath, char, pathlen);
 312                         }
 313
 314                 } else {
 315 #endif /* defined(ENABLE_ZLIB) */
 316                         pathlen = strlen("file://") + lce->pathlen + namelen + strlen("0");
 317
 318                         tmppath = MNEW(char, pathlen);
 319
 320                         sprintf(tmppath, "file://%s%s", lce->path, namestart);
 321
 322                         /* Does this file exist? */
 323
 324                         if (stat(tmppath + strlen("file://") - 1, &buf) == 0)
 325                                 if (!S_ISDIR(buf.st_mode))
 326                                         path = javastring_new_from_utf_string(tmppath);
 327
 328                         MFREE(tmppath, char, pathlen);
 329 #if defined(ENABLE_ZLIB)
 330                 }
 331 #endif
 332
 333                 /* if a resource was found, add it to the vector */
 334
 335                 if (path) {
 336                         ret = vm_call_method_int(m, o, path);
 337
 338                         if (exceptions_get_exception() != NULL)
 339                                 goto return_NULL;
 340
 341                         if (ret == 0)
 342                                 goto return_NULL;
 343                 }
 344         }
 345
 346         MFREE(buffer, char, bufsize);
 347
 348         return (java_util_Vector *) o;
 349
 350 return_NULL:
 351         MFREE(buffer, char, bufsize);
 352
 353         return NULL;
 354 }
 355
 356
 357 /*
 358  * Class:     java/lang/VMClassLoader
 359  * Method:    defaultAssertionStatus
 360  * Signature: ()Z
 361  */
 362 JNIEXPORT s4 JNICALL Java_java_lang_VMClassLoader_defaultAssertionStatus(JNIEnv *env, jclass clazz)
 363 {
 364         return _Jv_jvm->Java_java_lang_VMClassLoader_defaultAssertionStatus;
 365 }
 366
 367
 368 /*
 369  * Class:     java/lang/VMClassLoader
 370  * Method:    findLoadedClass
 371  * Signature: (Ljava/lang/ClassLoader;Ljava/lang/String;)Ljava/lang/Class;
 372  */
 373 JNIEXPORT java_lang_Class* JNICALL Java_java_lang_VMClassLoader_findLoadedClass(JNIEnv *env, jclass clazz, java_lang_ClassLoader *cl, java_lang_String *name)
 374 {
 375         classinfo *c;
 376         utf       *u;
 377
 378         /* replace `.' by `/', this is required by the classcache */
 379
 380         u = javastring_toutf(name, true);
 381
 382         /* lookup for defining classloader */
 383
 384         c = classcache_lookup_defined((classloader *) cl, u);
 385
 386         /* if not found, lookup for initiating classloader */
 387
 388         if (c == NULL)
 389                 c = classcache_lookup((classloader *) cl, u);
 390
 391         return (java_lang_Class *) c;
 392 }
 393
 394
 395 /*
 396  * These are local overrides for various environment variables in Emacs.
 397  * Please do not remove this and leave it at the end of the file, where
 398  * Emacs will automagically detect them.
 399  * ---------------------------------------------------------------------
 400  * Local variables:
 401  * mode: c
 402  * indent-tabs-mode: t
 403  * c-basic-offset: 4
 404  * tab-width: 4
 405  * End:
 406  * vim:noexpandtab:sw=4:ts=4:
 407  */