1 /* src/vm/suck.c - functions to read LE ordered types from a buffer
3 Copyright (C) 1996-2005, 2006 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
8 This file is part of CACAO.
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.
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.
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
25 Contact: cacao@cacaojvm.org
27 Authors: Christian Thalinger
31 $Id: suck.c 4587 2006-03-12 23:23:52Z twisti $
43 #include "mm/memory.h"
44 #include "toolbox/list.h"
45 #include "toolbox/logging.h"
46 #include "toolbox/util.h"
47 #include "vm/exceptions.h"
48 #include "vm/loader.h"
49 #include "vm/options.h"
50 #include "vm/properties.h"
51 #include "vm/stringlocal.h"
56 /* global variables ***********************************************************/
58 char *bootclasspath; /* contains the boot classpath */
59 char *classpath; /* contains the classpath */
61 list *list_classpath_entries;
64 /* suck_init *******************************************************************
66 Initializes the suck subsystem like initializing the classpath
69 *******************************************************************************/
73 list_classpath_entries = NEW(list);
75 list_init(list_classpath_entries, OFFSET(list_classpath_entry, linkage));
83 /* scandir_filter **************************************************************
85 Filters for zip/jar files.
87 *******************************************************************************/
89 static int scandir_filter(const struct dirent *a)
93 #if defined(_DIRENT_HAVE_D_NAMLEN)
96 namlen = strlen(a->d_name);
99 if ((strncasecmp(a->d_name + namlen - 4, ".zip", 4) == 0) ||
100 (strncasecmp(a->d_name + namlen - 4, ".jar", 4) == 0))
107 /* suck_add ********************************************************************
109 Adds a classpath to the global classpath entries list.
111 *******************************************************************************/
113 void suck_add(char *classpath)
115 list_classpath_entry *lce;
123 #if defined(ENABLE_ZLIB)
127 /* parse the classpath string */
129 for (start = classpath; (*start) != '\0'; ) {
131 /* search for ':' delimiter to get the end of the current entry */
132 for (end = start; ((*end) != '\0') && ((*end) != ':'); end++);
136 filenamelen = end - start;
138 if (filenamelen > 4) {
139 if ((strncasecmp(end - 4, ".zip", 4) == 0) ||
140 (strncasecmp(end - 4, ".jar", 4) == 0)) {
145 /* save classpath entries as absolute pathnames */
150 if (*start != '/') { /* XXX fix me for win32 */
152 cwdlen = strlen(cwd) + strlen("/");
155 /* allocate memory for filename and fill it */
157 filename = MNEW(char, filenamelen + cwdlen + strlen("/") +
161 strcpy(filename, cwd);
162 strcat(filename, "/");
163 strncat(filename, start, filenamelen);
165 /* add cwd length to file length */
166 filenamelen += cwdlen;
169 strncpy(filename, start, filenamelen);
170 filename[filenamelen] = '\0';
176 #if defined(ENABLE_ZLIB)
177 ht = zip_open(filename);
180 lce = NEW(list_classpath_entry);
182 lce->type = CLASSPATH_ARCHIVE;
184 lce->path = filename;
185 lce->pathlen = filenamelen;
187 /* SUN compatible -verbose:class output */
189 if (opt_verboseclass)
190 printf("[Opened %s]\n", filename);
194 throw_cacao_exception_exit(string_java_lang_InternalError,
195 "zip/jar files not supported");
199 if (filename[filenamelen - 1] != '/') {/* XXX fixme for win32 */
200 filename[filenamelen] = '/';
201 filename[filenamelen + 1] = '\0';
205 lce = NEW(list_classpath_entry);
207 lce->type = CLASSPATH_PATH;
208 lce->path = filename;
209 lce->pathlen = filenamelen;
212 /* add current classpath entry, if no error */
215 list_addlast(list_classpath_entries, lce);
218 /* goto next classpath entry, skip ':' delimiter */
228 /* suck_add_from_property ******************************************************
230 Adds a classpath form a property entry to the global classpath
233 *******************************************************************************/
235 void suck_add_from_property(char *key)
242 struct dirent **namelist;
246 char *tmpbootclasspath;
248 /* get the property value */
250 value = properties_get(key);
255 /* get the directory entries of the property */
257 for (start = value; (*start) != '\0'; ) {
259 /* search for ':' delimiter to get the end of the current entry */
261 for (end = start; ((*end) != '\0') && ((*end) != ':'); end++);
266 /* allocate memory for the path entry */
268 pathlen = end - start;
269 path = MNEW(char, pathlen + strlen("0"));
271 /* copy and terminate the string */
273 strncpy(path, start, pathlen);
274 path[pathlen] = '\0';
276 /* scan the directory found for zip/jar files */
278 n = scandir(path, &namelist, scandir_filter, alphasort);
280 /* on error, just continue, this should be ok */
283 for (i = 0; i < n; i++) {
284 #if defined(_DIRENT_HAVE_D_NAMLEN)
285 namlen = namelist[i]->d_namlen;
287 namlen = strlen(namelist[i]->d_name);
290 /* reallocate memory for bootclasspath */
292 tmpbootclasspath = MNEW(char,
293 pathlen + strlen("/") + namlen +
295 strlen(bootclasspath) +
298 /* prepend the file found to bootclasspath */
300 strcpy(tmpbootclasspath, path);
301 strcat(tmpbootclasspath, "/");
302 strcat(tmpbootclasspath, namelist[i]->d_name);
303 strcat(tmpbootclasspath, ":");
305 strcat(tmpbootclasspath, bootclasspath);
307 /* free old bootclasspath memory */
309 MFREE(bootclasspath, u1, strlen(bootclasspath));
311 /* and set the new bootclasspath */
313 bootclasspath = tmpbootclasspath;
315 /* free the memory allocated by scandir */
317 FREE(namelist[i], struct dirent);
320 FREE(namelist, struct dirent);
323 MFREE(path, char, pathlen + strlen("0"));
326 /* goto next entry, skip ':' delimiter */
336 /* suck_check_classbuffer_size *************************************************
338 Assert that at least <len> bytes are left to read <len> is limited
339 to the range of non-negative s4 values.
341 *******************************************************************************/
343 bool suck_check_classbuffer_size(classbuffer *cb, s4 len)
345 #ifdef ENABLE_VERIFIER
346 if (len < 0 || ((cb->data + cb->size) - cb->pos) < len) {
348 new_classformaterror((cb)->class, "Truncated class file");
352 #endif /* ENABLE_VERIFIER */
358 u1 suck_u1(classbuffer *cb)
362 a = SUCK_BE_U1(cb->pos);
369 u2 suck_u2(classbuffer *cb)
373 a = SUCK_BE_U2(cb->pos);
380 u4 suck_u4(classbuffer *cb)
384 a = SUCK_BE_U4(cb->pos);
391 u8 suck_u8(classbuffer *cb)
393 #if U8_AVAILABLE == 1
396 a = SUCK_BE_U8(cb->pos);
403 v.high = suck_u4(cb);
411 float suck_float(classbuffer *cb)
415 #if WORDS_BIGENDIAN == 0
419 for (i = 0; i < 4; i++)
420 buffer[3 - i] = suck_u1(cb);
422 MCOPY((u1 *) (&f), buffer, u1, 4);
424 suck_nbytes((u1*) (&f), cb, 4);
427 if (sizeof(float) != 4) {
428 *exceptionptr = new_internalerror("Incompatible float-format");
430 /* XXX should we exit in such a case? */
431 throw_exception_exit();
438 double suck_double(classbuffer *cb)
442 #if WORDS_BIGENDIAN == 0
446 #if defined(__ARM__) && defined(__ARMEL__) && !defined(__VFP_FP__)
448 * On little endian ARM processors when using FPA, word order
449 * of doubles is still big endian. So take that into account
450 * here. When using VFP, word order of doubles follows byte
451 * order. (michi 2005/07/24)
453 for (i = 0; i < 4; i++)
454 buffer[3 - i] = suck_u1(cb);
455 for (i = 0; i < 4; i++)
456 buffer[7 - i] = suck_u1(cb);
458 for (i = 0; i < 8; i++)
459 buffer[7 - i] = suck_u1(cb);
460 #endif /* defined(__ARM__) && ... */
462 MCOPY((u1 *) (&d), buffer, u1, 8);
464 suck_nbytes((u1*) (&d), cb, 8);
467 if (sizeof(double) != 8) {
468 *exceptionptr = new_internalerror("Incompatible double-format");
470 /* XXX should we exit in such a case? */
471 throw_exception_exit();
478 /* suck_nbytes *****************************************************************
480 Transfer block of classfile data into a buffer.
482 *******************************************************************************/
484 void suck_nbytes(u1 *buffer, classbuffer *cb, s4 len)
486 MCOPY(buffer, cb->pos, u1, len);
491 /* suck_skip_nbytes ************************************************************
493 Skip block of classfile data.
495 *******************************************************************************/
497 void suck_skip_nbytes(classbuffer *cb, s4 len)
503 /* suck_start ******************************************************************
505 Returns true if classbuffer is already loaded or a file for the
506 specified class has succussfully been read in. All directories of
507 the searchpath are used to find the classfile (<classname>.class).
508 Returns NULL if no classfile is found and writes an error message.
510 *******************************************************************************/
512 classbuffer *suck_start(classinfo *c)
514 list_classpath_entry *lce;
523 /* initialize return value */
527 /* get the classname as char string (do it here for the warning at
528 the and of the function) */
530 filenamelen = utf_strlen(c->name) + strlen(".class") + strlen("0");
531 filename = MNEW(char, filenamelen);
533 utf_sprint(filename, c->name);
534 strcat(filename, ".class");
536 /* walk through all classpath entries */
538 for (lce = list_first(list_classpath_entries); lce != NULL && cb == NULL;
539 lce = list_next(list_classpath_entries, lce)) {
540 #if defined(ENABLE_ZLIB)
541 if (lce->type == CLASSPATH_ARCHIVE) {
543 #if defined(USE_THREADS)
544 /* enter a monitor on zip/jar archives */
546 builtin_monitorenter((java_objectheader *) lce);
549 /* try to get the file in current archive */
551 cb = zip_get(lce, c);
553 #if defined(USE_THREADS)
554 /* leave the monitor */
556 builtin_monitorexit((java_objectheader *) lce);
560 #endif /* defined(ENABLE_ZLIB) */
561 path = MNEW(char, lce->pathlen + filenamelen);
562 strcpy(path, lce->path);
563 strcat(path, filename);
565 classfile = fopen(path, "r");
567 if (classfile) { /* file exists */
568 if (!stat(path, &buffer)) { /* read classfile data */
569 cb = NEW(classbuffer);
571 cb->size = buffer.st_size;
572 cb->data = MNEW(u1, cb->size);
574 cb->path = lce->path;
576 /* read class data */
578 len = fread(cb->data, 1, cb->size, classfile);
580 if (len != buffer.st_size) {
582 /* if (ferror(classfile)) { */
586 /* close the class file */
592 MFREE(path, char, lce->pathlen + filenamelen);
593 #if defined(ENABLE_ZLIB)
600 dolog("Warning: Can not open class file '%s'", filename);
602 MFREE(filename, char, filenamelen);
608 /* suck_stop *******************************************************************
610 Frees memory for buffer with classfile data.
612 CAUTION: This function may only be called if buffer has been
613 allocated by suck_start with reading a file.
615 *******************************************************************************/
617 void suck_stop(classbuffer *cb)
621 MFREE(cb->data, u1, cb->size);
622 FREE(cb, classbuffer);
627 * These are local overrides for various environment variables in Emacs.
628 * Please do not remove this and leave it at the end of the file, where
629 * Emacs will automagically detect them.
630 * ---------------------------------------------------------------------
633 * indent-tabs-mode: t