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 <sys/stat.h>
  31
  32 #include "vm/types.h"
  33
  34 #include "mm/memory.h"
  35
  36 #include "native/jni.h"
  37 #include "native/llni.h"
  38 #include "native/native.h"
  39 #include "native/include/java_lang_Class.h"
  40 #include "native/include/java_lang_String.h"
  41 #include "native/include/java_security_ProtectionDomain.h"  /* required by... */
  42 #include "native/include/java_lang_ClassLoader.h"
  43 #include "native/include/java_util_Vector.h"
  44
  45 #include "native/include/java_lang_VMClassLoader.h"
  46
  47 #include "native/vm/java_lang_ClassLoader.h"
  48
  49 #include "toolbox/logging.h"
  50
  51 #include "vm/builtin.h"
  52 #include "vm/exceptions.h"
  53 #include "vm/initialize.h"
  54 #include "vm/primitive.h"
  55 #include "vm/stringlocal.h"
  56 #include "vm/vm.h"
  57
  58 #include "vm/jit/asmpart.h"
  59
  60 #include "vmcore/class.h"
  61 #include "vmcore/classcache.h"
  62 #include "vmcore/linker.h"
  63 #include "vmcore/loader.h"
  64 #include "vmcore/options.h"
  65 #include "vmcore/statistics.h"
  66 #include "vmcore/suck.h"
  67 #include "vmcore/zip.h"
  68
  69 #if defined(ENABLE_JVMTI)
  70 #include "native/jvmti/cacaodbg.h"
  71 #endif
  72
  73
  74 /* native methods implemented by this file ************************************/
  75
  76 static JNINativeMethod methods[] = {
  77         { "defineClass",            "(Ljava/lang/ClassLoader;Ljava/lang/String;[BIILjava/security/ProtectionDomain;)Ljava/lang/Class;", (void *) (ptrint) &Java_java_lang_VMClassLoader_defineClass            },
  78         { "getPrimitiveClass",      "(C)Ljava/lang/Class;",                                                                             (void *) (ptrint) &Java_java_lang_VMClassLoader_getPrimitiveClass      },
  79         { "resolveClass",           "(Ljava/lang/Class;)V",                                                                             (void *) (ptrint) &Java_java_lang_VMClassLoader_resolveClass           },
  80         { "loadClass",              "(Ljava/lang/String;Z)Ljava/lang/Class;",                                                           (void *) (ptrint) &Java_java_lang_VMClassLoader_loadClass              },
  81         { "nativeGetResources",     "(Ljava/lang/String;)Ljava/util/Vector;",                                                           (void *) (ptrint) &Java_java_lang_VMClassLoader_nativeGetResources     },
  82         { "defaultAssertionStatus", "()Z",                                                                                              (void *) (ptrint) &Java_java_lang_VMClassLoader_defaultAssertionStatus },
  83         { "findLoadedClass",        "(Ljava/lang/ClassLoader;Ljava/lang/String;)Ljava/lang/Class;",                                     (void *) (ptrint) &Java_java_lang_VMClassLoader_findLoadedClass        },
  84 };
  85
  86
  87 /* _Jv_java_lang_VMClassLoader_init ********************************************
  88
  89    Register native functions.
  90
  91 *******************************************************************************/
  92
  93 void _Jv_java_lang_VMClassLoader_init(void)
  94 {
  95         utf *u;
  96
  97         u = utf_new_char("java/lang/VMClassLoader");
  98
  99         native_method_register(u, methods, NATIVE_METHODS_COUNT);
 100 }
 101
 102
 103 /*
 104  * Class:     java/lang/VMClassLoader
 105  * Method:    defineClass
 106  * Signature: (Ljava/lang/ClassLoader;Ljava/lang/String;[BIILjava/security/ProtectionDomain;)Ljava/lang/Class;
 107  */
 108 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)
 109 {
 110         return _Jv_java_lang_ClassLoader_defineClass(cl, name, data, offset, len, pd);
 111 }
 112
 113
 114 /*
 115  * Class:     java/lang/VMClassLoader
 116  * Method:    getPrimitiveClass
 117  * Signature: (C)Ljava/lang/Class;
 118  */
 119 JNIEXPORT java_lang_Class* JNICALL Java_java_lang_VMClassLoader_getPrimitiveClass(JNIEnv *env, jclass clazz, s4 type)
 120 {
 121         classinfo *c;
 122
 123         c = primitive_class_get_by_char(type);
 124
 125         if (c == NULL) {
 126                 exceptions_throw_classnotfoundexception(utf_null);
 127                 return NULL;
 128         }
 129
 130         return LLNI_classinfo_wrap(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 = LLNI_classinfo_unwrap(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, s4 resolve)
 165 {
 166         classinfo *c;
 167         utf       *u;
 168
 169         if (name == NULL) {
 170                 exceptions_throw_nullpointerexception();
 171                 return NULL;
 172         }
 173
 174         /* create utf string in which '.' is replaced by '/' */
 175
 176         u = javastring_toutf((java_handle_t *) name, true);
 177
 178         /* load class */
 179
 180         c = load_class_bootstrap(u);
 181
 182         if (c == NULL)
 183                 return NULL;
 184
 185         /* resolve class -- if requested */
 186
 187 /*      if (resolve) */
 188                 if (!link_class(c))
 189                         return NULL;
 190
 191         return LLNI_classinfo_wrap(c);
 192 }
 193
 194
 195 /*
 196  * Class:     java/lang/VMClassLoader
 197  * Method:    nativeGetResources
 198  * Signature: (Ljava/lang/String;)Ljava/util/Vector;
 199  */
 200 JNIEXPORT java_util_Vector* JNICALL Java_java_lang_VMClassLoader_nativeGetResources(JNIEnv *env, jclass clazz, java_lang_String *name)
 201 {
 202         java_handle_t        *o;         /* vector being created     */
 203         methodinfo           *m;         /* "add" method of vector   */
 204         java_handle_t        *path;      /* path to be added         */
 205         list_classpath_entry *lce;       /* classpath entry          */
 206         utf                  *utfname;   /* utf to look for          */
 207         char                 *buffer;    /* char buffer              */
 208         char                 *namestart; /* start of name to use     */
 209         char                 *tmppath;   /* temporary buffer         */
 210         s4                    namelen;   /* length of name to use    */
 211         s4                    searchlen; /* length of name to search */
 212         s4                    bufsize;   /* size of buffer allocated */
 213         s4                    pathlen;   /* name of path to assemble */
 214         struct stat           buf;       /* buffer for stat          */
 215         jboolean              ret;       /* return value of "add"    */
 216
 217         /* get the resource name as utf string */
 218
 219         utfname = javastring_toutf((java_handle_t *) name, false);
 220
 221         if (utfname == NULL)
 222                 return NULL;
 223
 224         /* copy it to a char buffer */
 225
 226         namelen   = utf_bytes(utfname);
 227         searchlen = namelen;
 228         bufsize   = namelen + strlen("0");
 229         buffer    = MNEW(char, bufsize);
 230
 231         utf_copy(buffer, utfname);
 232         namestart = buffer;
 233
 234         /* skip leading '/' */
 235
 236         if (namestart[0] == '/') {
 237                 namestart++;
 238                 namelen--;
 239                 searchlen--;
 240         }
 241
 242         /* remove trailing `.class' */
 243
 244         if (namelen >= 6 && strcmp(namestart + (namelen - 6), ".class") == 0) {
 245                 searchlen -= 6;
 246         }
 247
 248         /* create a new needle to look for, if necessary */
 249
 250         if (searchlen != bufsize-1) {
 251                 utfname = utf_new(namestart, searchlen);
 252                 if (utfname == NULL)
 253                         goto return_NULL;
 254         }
 255
 256         /* new Vector() */
 257
 258         o = native_new_and_init(class_java_util_Vector);
 259
 260         if (o == NULL)
 261                 goto return_NULL;
 262
 263         /* get Vector.add() method */
 264
 265         m = class_resolveclassmethod(class_java_util_Vector,
 266                                                                  utf_add,
 267                                                                  utf_new_char("(Ljava/lang/Object;)Z"),
 268                                                                  NULL,
 269                                                                  true);
 270
 271         if (m == NULL)
 272                 goto return_NULL;
 273
 274         /* iterate over all classpath entries */
 275
 276         for (lce = list_first(list_classpath_entries); lce != NULL;
 277                  lce = list_next(list_classpath_entries, lce)) {
 278                 /* clear path pointer */
 279                 path = NULL;
 280
 281 #if defined(ENABLE_ZLIB)
 282                 if (lce->type == CLASSPATH_ARCHIVE) {
 283
 284                         if (zip_find(lce, utfname)) {
 285                                 pathlen = strlen("jar:file://") + lce->pathlen + strlen("!/") +
 286                                         namelen + strlen("0");
 287
 288                                 tmppath = MNEW(char, pathlen);
 289
 290                                 sprintf(tmppath, "jar:file://%s!/%s", lce->path, namestart);
 291                                 path = javastring_new_from_utf_string(tmppath),
 292
 293                                 MFREE(tmppath, char, pathlen);
 294                         }
 295
 296                 } else {
 297 #endif /* defined(ENABLE_ZLIB) */
 298                         pathlen = strlen("file://") + lce->pathlen + namelen + strlen("0");
 299
 300                         tmppath = MNEW(char, pathlen);
 301
 302                         sprintf(tmppath, "file://%s%s", lce->path, namestart);
 303
 304                         /* Does this file exist? */
 305
 306                         if (stat(tmppath + strlen("file://") - 1, &buf) == 0)
 307                                 if (!S_ISDIR(buf.st_mode))
 308                                         path = javastring_new_from_utf_string(tmppath);
 309
 310                         MFREE(tmppath, char, pathlen);
 311 #if defined(ENABLE_ZLIB)
 312                 }
 313 #endif
 314
 315                 /* if a resource was found, add it to the vector */
 316
 317                 if (path != NULL) {
 318                         ret = vm_call_method_int(m, o, path);
 319
 320                         if (exceptions_get_exception() != NULL)
 321                                 goto return_NULL;
 322
 323                         if (ret == 0)
 324                                 goto return_NULL;
 325                 }
 326         }
 327
 328         MFREE(buffer, char, bufsize);
 329
 330         return (java_util_Vector *) o;
 331
 332 return_NULL:
 333         MFREE(buffer, char, bufsize);
 334
 335         return NULL;
 336 }
 337
 338
 339 /*
 340  * Class:     java/lang/VMClassLoader
 341  * Method:    defaultAssertionStatus
 342  * Signature: ()Z
 343  */
 344 JNIEXPORT s4 JNICALL Java_java_lang_VMClassLoader_defaultAssertionStatus(JNIEnv *env, jclass clazz)
 345 {
 346         return _Jv_jvm->Java_java_lang_VMClassLoader_defaultAssertionStatus;
 347 }
 348
 349
 350 /*
 351  * Class:     java/lang/VMClassLoader
 352  * Method:    findLoadedClass
 353  * Signature: (Ljava/lang/ClassLoader;Ljava/lang/String;)Ljava/lang/Class;
 354  */
 355 JNIEXPORT java_lang_Class* JNICALL Java_java_lang_VMClassLoader_findLoadedClass(JNIEnv *env, jclass clazz, java_lang_ClassLoader *loader, java_lang_String *name)
 356 {
 357         classloader *cl;
 358         classinfo   *c;
 359         utf         *u;
 360
 361         cl = (classloader *) loader;
 362
 363         /* replace `.' by `/', this is required by the classcache */
 364
 365         u = javastring_toutf((java_handle_t *) name, true);
 366
 367         /* lookup for defining classloader */
 368
 369         c = classcache_lookup_defined(cl, u);
 370
 371         /* if not found, lookup for initiating classloader */
 372
 373         if (c == NULL)
 374                 c = classcache_lookup(cl, u);
 375
 376         return LLNI_classinfo_wrap(c);
 377 }
 378
 379
 380 /*
 381  * These are local overrides for various environment variables in Emacs.
 382  * Please do not remove this and leave it at the end of the file, where
 383  * Emacs will automagically detect them.
 384  * ---------------------------------------------------------------------
 385  * Local variables:
 386  * mode: c
 387  * indent-tabs-mode: t
 388  * c-basic-offset: 4
 389  * tab-width: 4
 390  * End:
 391  * vim:noexpandtab:sw=4:ts=4:
 392  */