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 */
  26
  27
  28 #include "config.h"
  29
  30 #include <assert.h>
  31 #include <sys/stat.h>
  32
  33 #include "vm/types.h"
  34
  35 #include "mm/memory.h"
  36
  37 #include "native/jni.h"
  38 #include "native/llni.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/include/java_lang_VMClassLoader.h"
  47
  48 #include "native/vm/java_lang_ClassLoader.h"
  49
  50 #include "toolbox/logging.h"
  51
  52 #include "vm/builtin.h"
  53 #include "vm/exceptions.h"
  54 #include "vm/initialize.h"
  55 #include "vm/primitive.h"
  56 #include "vm/stringlocal.h"
  57 #include "vm/vm.h"
  58
  59 #include "vm/jit/asmpart.h"
  60
  61 #include "vmcore/class.h"
  62 #include "vmcore/classcache.h"
  63 #include "vmcore/linker.h"
  64 #include "vmcore/loader.h"
  65 #include "vmcore/options.h"
  66 #include "vmcore/statistics.h"
  67 #include "vmcore/suck.h"
  68 #include "vmcore/zip.h"
  69
  70 #if defined(ENABLE_JVMTI)
  71 #include "native/jvmti/cacaodbg.h"
  72 #endif
  73
  74
  75 /* native methods implemented by this file ************************************/
  76
  77 static JNINativeMethod methods[] = {
  78         { "defineClass",            "(Ljava/lang/ClassLoader;Ljava/lang/String;[BIILjava/security/ProtectionDomain;)Ljava/lang/Class;", (void *) (ptrint) &Java_java_lang_VMClassLoader_defineClass            },
  79         { "getPrimitiveClass",      "(C)Ljava/lang/Class;",                                                                             (void *) (ptrint) &Java_java_lang_VMClassLoader_getPrimitiveClass      },
  80         { "resolveClass",           "(Ljava/lang/Class;)V",                                                                             (void *) (ptrint) &Java_java_lang_VMClassLoader_resolveClass           },
  81         { "loadClass",              "(Ljava/lang/String;Z)Ljava/lang/Class;",                                                           (void *) (ptrint) &Java_java_lang_VMClassLoader_loadClass              },
  82         { "nativeGetResources",     "(Ljava/lang/String;)Ljava/util/Vector;",                                                           (void *) (ptrint) &Java_java_lang_VMClassLoader_nativeGetResources     },
  83         { "defaultAssertionStatus", "()Z",                                                                                              (void *) (ptrint) &Java_java_lang_VMClassLoader_defaultAssertionStatus },
  84         { "findLoadedClass",        "(Ljava/lang/ClassLoader;Ljava/lang/String;)Ljava/lang/Class;",                                     (void *) (ptrint) &Java_java_lang_VMClassLoader_findLoadedClass        },
  85 };
  86
  87
  88 /* _Jv_java_lang_VMClassLoader_init ********************************************
  89
  90    Register native functions.
  91
  92 *******************************************************************************/
  93
  94 void _Jv_java_lang_VMClassLoader_init(void)
  95 {
  96         utf *u;
  97
  98         u = utf_new_char("java/lang/VMClassLoader");
  99
 100         native_method_register(u, methods, NATIVE_METHODS_COUNT);
 101 }
 102
 103
 104 /*
 105  * Class:     java/lang/VMClassLoader
 106  * Method:    defineClass
 107  * Signature: (Ljava/lang/ClassLoader;Ljava/lang/String;[BIILjava/security/ProtectionDomain;)Ljava/lang/Class;
 108  */
 109 JNIEXPORT java_lang_Class* JNICALL Java_java_lang_VMClassLoader_defineClass(JNIEnv *env, jclass clazz, java_lang_ClassLoader *cl, java_lang_String *name, java_handle_bytearray_t *data, s4 offset, s4 len, java_security_ProtectionDomain *pd)
 110 {
 111         return _Jv_java_lang_ClassLoader_defineClass(cl, name, data, offset, len, pd);
 112 }
 113
 114
 115 /*
 116  * Class:     java/lang/VMClassLoader
 117  * Method:    getPrimitiveClass
 118  * Signature: (C)Ljava/lang/Class;
 119  */
 120 JNIEXPORT java_lang_Class* JNICALL Java_java_lang_VMClassLoader_getPrimitiveClass(JNIEnv *env, jclass clazz, s4 type)
 121 {
 122         classinfo *c;
 123
 124         c = primitive_class_get_by_char(type);
 125
 126         if (c == NULL) {
 127                 exceptions_throw_classnotfoundexception(utf_null);
 128                 return NULL;
 129         }
 130
 131         return LLNI_classinfo_wrap(c);
 132 }
 133
 134
 135 /*
 136  * Class:     java/lang/VMClassLoader
 137  * Method:    resolveClass
 138  * Signature: (Ljava/lang/Class;)V
 139  */
 140 JNIEXPORT void JNICALL Java_java_lang_VMClassLoader_resolveClass(JNIEnv *env, jclass clazz, java_lang_Class *c)
 141 {
 142         classinfo *ci;
 143
 144         ci = LLNI_classinfo_unwrap(c);
 145
 146         if (!ci) {
 147                 exceptions_throw_nullpointerexception();
 148                 return;
 149         }
 150
 151         /* link the class */
 152
 153         if (!(ci->state & CLASS_LINKED))
 154                 (void) link_class(ci);
 155
 156         return;
 157 }
 158
 159
 160 /*
 161  * Class:     java/lang/VMClassLoader
 162  * Method:    loadClass
 163  * Signature: (Ljava/lang/String;Z)Ljava/lang/Class;
 164  */
 165 JNIEXPORT java_lang_Class* JNICALL Java_java_lang_VMClassLoader_loadClass(JNIEnv *env, jclass clazz, java_lang_String *name, s4 resolve)
 166 {
 167         classinfo *c;
 168         utf       *u;
 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((java_handle_t *) name, true);
 178
 179         /* load class */
 180
 181         c = load_class_bootstrap(u);
 182
 183         if (c == NULL)
 184                 return NULL;
 185
 186         /* resolve class -- if requested */
 187
 188 /*      if (resolve) */
 189                 if (!link_class(c))
 190                         return NULL;
 191
 192         return LLNI_classinfo_wrap(c);
 193 }
 194
 195
 196 /*
 197  * Class:     java/lang/VMClassLoader
 198  * Method:    nativeGetResources
 199  * Signature: (Ljava/lang/String;)Ljava/util/Vector;
 200  */
 201 JNIEXPORT java_util_Vector* JNICALL Java_java_lang_VMClassLoader_nativeGetResources(JNIEnv *env, jclass clazz, java_lang_String *name)
 202 {
 203         java_handle_t        *o;         /* vector being created     */
 204         methodinfo           *m;         /* "add" method of vector   */
 205         java_handle_t        *path;      /* path to be added         */
 206         list_classpath_entry *lce;       /* classpath entry          */
 207         utf                  *utfname;   /* utf to look for          */
 208         char                 *buffer;    /* char buffer              */
 209         char                 *namestart; /* start of name to use     */
 210         char                 *tmppath;   /* temporary buffer         */
 211         s4                    namelen;   /* length of name to use    */
 212         s4                    searchlen; /* length of name to search */
 213         s4                    bufsize;   /* size of buffer allocated */
 214         s4                    pathlen;   /* name of path to assemble */
 215         struct stat           buf;       /* buffer for stat          */
 216         jboolean              ret;       /* return value of "add"    */
 217
 218         /* get the resource name as utf string */
 219
 220         utfname = javastring_toutf((java_handle_t *) name, false);
 221
 222         if (utfname == NULL)
 223                 return NULL;
 224
 225         /* copy it to a char buffer */
 226
 227         namelen   = utf_bytes(utfname);
 228         searchlen = namelen;
 229         bufsize   = namelen + strlen("0");
 230         buffer    = MNEW(char, bufsize);
 231
 232         utf_copy(buffer, utfname);
 233         namestart = buffer;
 234
 235         /* skip leading '/' */
 236
 237         if (namestart[0] == '/') {
 238                 namestart++;
 239                 namelen--;
 240                 searchlen--;
 241         }
 242
 243         /* remove trailing `.class' */
 244
 245         if (namelen >= 6 && strcmp(namestart + (namelen - 6), ".class") == 0) {
 246                 searchlen -= 6;
 247         }
 248
 249         /* create a new needle to look for, if necessary */
 250
 251         if (searchlen != bufsize-1) {
 252                 utfname = utf_new(namestart, searchlen);
 253                 if (utfname == NULL)
 254                         goto return_NULL;
 255         }
 256
 257         /* new Vector() */
 258
 259         o = native_new_and_init(class_java_util_Vector);
 260
 261         if (o == NULL)
 262                 goto return_NULL;
 263
 264         /* get Vector.add() method */
 265
 266         m = class_resolveclassmethod(class_java_util_Vector,
 267                                                                  utf_add,
 268                                                                  utf_new_char("(Ljava/lang/Object;)Z"),
 269                                                                  NULL,
 270                                                                  true);
 271
 272         if (m == NULL)
 273                 goto return_NULL;
 274
 275         /* iterate over all classpath entries */
 276
 277         for (lce = list_first(list_classpath_entries); lce != NULL;
 278                  lce = list_next(list_classpath_entries, lce)) {
 279                 /* clear path pointer */
 280                 path = NULL;
 281
 282 #if defined(ENABLE_ZLIB)
 283                 if (lce->type == CLASSPATH_ARCHIVE) {
 284
 285                         if (zip_find(lce, utfname)) {
 286                                 pathlen = strlen("jar:file://") + lce->pathlen + strlen("!/") +
 287                                         namelen + strlen("0");
 288
 289                                 tmppath = MNEW(char, pathlen);
 290
 291                                 sprintf(tmppath, "jar:file://%s!/%s", lce->path, namestart);
 292                                 path = javastring_new_from_utf_string(tmppath),
 293
 294                                 MFREE(tmppath, char, pathlen);
 295                         }
 296
 297                 } else {
 298 #endif /* defined(ENABLE_ZLIB) */
 299                         pathlen = strlen("file://") + lce->pathlen + namelen + strlen("0");
 300
 301                         tmppath = MNEW(char, pathlen);
 302
 303                         sprintf(tmppath, "file://%s%s", lce->path, namestart);
 304
 305                         /* Does this file exist? */
 306
 307                         if (stat(tmppath + strlen("file://") - 1, &buf) == 0)
 308                                 if (!S_ISDIR(buf.st_mode))
 309                                         path = javastring_new_from_utf_string(tmppath);
 310
 311                         MFREE(tmppath, char, pathlen);
 312 #if defined(ENABLE_ZLIB)
 313                 }
 314 #endif
 315
 316                 /* if a resource was found, add it to the vector */
 317
 318                 if (path != NULL) {
 319                         ret = vm_call_method_int(m, o, path);
 320
 321                         if (exceptions_get_exception() != NULL)
 322                                 goto return_NULL;
 323
 324                         if (ret == 0)
 325                                 goto return_NULL;
 326                 }
 327         }
 328
 329         MFREE(buffer, char, bufsize);
 330
 331         return (java_util_Vector *) o;
 332
 333 return_NULL:
 334         MFREE(buffer, char, bufsize);
 335
 336         return NULL;
 337 }
 338
 339
 340 /*
 341  * Class:     java/lang/VMClassLoader
 342  * Method:    defaultAssertionStatus
 343  * Signature: ()Z
 344  */
 345 JNIEXPORT s4 JNICALL Java_java_lang_VMClassLoader_defaultAssertionStatus(JNIEnv *env, jclass clazz)
 346 {
 347         return _Jv_jvm->Java_java_lang_VMClassLoader_defaultAssertionStatus;
 348 }
 349
 350
 351 /*
 352  * Class:     java/lang/VMClassLoader
 353  * Method:    findLoadedClass
 354  * Signature: (Ljava/lang/ClassLoader;Ljava/lang/String;)Ljava/lang/Class;
 355  */
 356 JNIEXPORT java_lang_Class* JNICALL Java_java_lang_VMClassLoader_findLoadedClass(JNIEnv *env, jclass clazz, java_lang_ClassLoader *loader, java_lang_String *name)
 357 {
 358         classloader *cl;
 359         classinfo   *c;
 360         utf         *u;
 361
 362         cl = loader_hashtable_classloader_find((java_handle_t *) loader);
 363
 364         if (cl == NULL)
 365                 vm_abort("unable to find classloader");
 366
 367         /* replace `.' by `/', this is required by the classcache */
 368
 369         u = javastring_toutf((java_handle_t *) name, true);
 370
 371         /* lookup for defining classloader */
 372
 373         c = classcache_lookup_defined(cl, u);
 374
 375         /* if not found, lookup for initiating classloader */
 376
 377         if (c == NULL)
 378                 c = classcache_lookup(cl, u);
 379
 380         return LLNI_classinfo_wrap(c);
 381 }
 382
 383
 384 /*
 385  * These are local overrides for various environment variables in Emacs.
 386  * Please do not remove this and leave it at the end of the file, where
 387  * Emacs will automagically detect them.
 388  * ---------------------------------------------------------------------
 389  * Local variables:
 390  * mode: c
 391  * indent-tabs-mode: t
 392  * c-basic-offset: 4
 393  * tab-width: 4
 394  * End:
 395  * vim:noexpandtab:sw=4:ts=4:
 396  */