1 /* src/vmcore/suck.c - functions to read LE ordered types from a buffer
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
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
39 #include "mm/memory.h"
41 #include "threads/lock-common.h"
43 #include "toolbox/list.h"
44 #include "toolbox/logging.h"
45 #include "toolbox/util.h"
47 #include "vm/exceptions.h"
48 #include "vm/properties.h"
51 #include "vmcore/loader.h"
52 #include "vmcore/options.h"
53 #include "vmcore/suck.h"
54 #include "vmcore/zip.h"
57 /* global variables ***********************************************************/
59 list_t *list_classpath_entries;
62 /* suck_init *******************************************************************
64 Initializes the suck subsystem like initializing the classpath
67 *******************************************************************************/
71 list_classpath_entries = list_create(OFFSET(list_classpath_entry, linkage));
79 /* scandir_filter **************************************************************
81 Filters for zip/jar files.
83 *******************************************************************************/
85 #if defined(__LINUX__)
86 static int scandir_filter(const struct dirent *a)
88 static int scandir_filter(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 vm_abort("suck_add: zip/jar files not supported");
198 if (filename[filenamelen - 1] != '/') {/* XXX fixme for win32 */
199 filename[filenamelen] = '/';
200 filename[filenamelen + 1] = '\0';
204 lce = NEW(list_classpath_entry);
206 lce->type = CLASSPATH_PATH;
207 lce->path = filename;
208 lce->pathlen = filenamelen;
211 /* add current classpath entry, if no error */
214 list_add_last(list_classpath_entries, lce);
217 /* goto next classpath entry, skip ':' delimiter */
227 /* suck_add_from_property ******************************************************
229 Adds a classpath form a property entry to the global classpath
232 *******************************************************************************/
234 void suck_add_from_property(char *key)
241 struct dirent **namelist;
245 char *boot_class_path;
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 /* Reset namelist to NULL for the freeing in an error case
281 /* scan the directory found for zip/jar files */
283 n = scandir(path, &namelist, scandir_filter, alphasort);
285 /* On error, just continue, this should be ok. */
288 for (i = 0; i < n; i++) {
289 #if defined(_DIRENT_HAVE_D_NAMLEN)
290 namlen = namelist[i]->d_namlen;
292 namlen = strlen(namelist[i]->d_name);
295 /* Allocate memory for bootclasspath. */
297 boot_class_path = properties_get("sun.boot.class.path");
300 pathlen + strlen("/") + namlen +
302 strlen(boot_class_path) +
305 /* Prepend the file found to the bootclasspath. */
309 strcat(p, namelist[i]->d_name);
311 strcat(p, boot_class_path);
313 properties_add("sun.boot.class.path", p);
314 properties_add("java.boot.class.path", p);
316 MFREE(boot_class_path, char, strlen(boot_class_path));
318 /* free the memory allocated by scandir */
319 /* (We use `free` as the memory came from the C library.) */
325 /* On some systems (like Linux) when n == 0, then namelist
326 returned from scnadir is NULL, thus we don't have to
328 (Use `free` as the memory came from the C library.) */
330 if (namelist != NULL)
333 MFREE(path, char, pathlen + strlen("0"));
336 /* goto next entry, skip ':' delimiter */
346 /* suck_check_classbuffer_size *************************************************
348 Assert that at least <len> bytes are left to read <len> is limited
349 to the range of non-negative s4 values.
351 *******************************************************************************/
353 bool suck_check_classbuffer_size(classbuffer *cb, s4 len)
355 #ifdef ENABLE_VERIFIER
356 if (len < 0 || ((cb->data + cb->size) - cb->pos) < len) {
357 exceptions_throw_classformaterror((cb)->class, "Truncated class file");
360 #endif /* ENABLE_VERIFIER */
366 u1 suck_u1(classbuffer *cb)
370 a = SUCK_BE_U1(cb->pos);
377 u2 suck_u2(classbuffer *cb)
381 a = SUCK_BE_U2(cb->pos);
388 u4 suck_u4(classbuffer *cb)
392 a = SUCK_BE_U4(cb->pos);
399 u8 suck_u8(classbuffer *cb)
401 #if U8_AVAILABLE == 1
404 a = SUCK_BE_U8(cb->pos);
411 v.high = suck_u4(cb);
419 float suck_float(classbuffer *cb)
423 #if WORDS_BIGENDIAN == 0
427 for (i = 0; i < 4; i++)
428 buffer[3 - i] = suck_u1(cb);
430 MCOPY((u1 *) (&f), buffer, u1, 4);
432 suck_nbytes((u1*) (&f), cb, 4);
435 assert(sizeof(float) == 4);
441 double suck_double(classbuffer *cb)
445 #if WORDS_BIGENDIAN == 0
449 # if defined(__ARM__) && defined(__ARMEL__) && !defined(__VFP_FP__)
451 * On little endian ARM processors when using FPA, word order
452 * of doubles is still big endian. So take that into account
453 * here. When using VFP, word order of doubles follows byte
454 * order. (michi 2005/07/24)
456 for (i = 0; i < 4; i++)
457 buffer[3 - i] = suck_u1(cb);
458 for (i = 0; i < 4; i++)
459 buffer[7 - i] = suck_u1(cb);
461 for (i = 0; i < 8; i++)
462 buffer[7 - i] = suck_u1(cb);
463 # endif /* defined(__ARM__) && ... */
465 MCOPY((u1 *) (&d), buffer, u1, 8);
467 suck_nbytes((u1*) (&d), cb, 8);
470 assert(sizeof(double) == 8);
476 /* suck_nbytes *****************************************************************
478 Transfer block of classfile data into a buffer.
480 *******************************************************************************/
482 void suck_nbytes(u1 *buffer, classbuffer *cb, s4 len)
484 MCOPY(buffer, cb->pos, u1, len);
489 /* suck_skip_nbytes ************************************************************
491 Skip block of classfile data.
493 *******************************************************************************/
495 void suck_skip_nbytes(classbuffer *cb, s4 len)
501 /* suck_start ******************************************************************
503 Returns true if classbuffer is already loaded or a file for the
504 specified class has succussfully been read in. All directories of
505 the searchpath are used to find the classfile (<classname>.class).
506 Returns NULL if no classfile is found and writes an error message.
508 *******************************************************************************/
510 classbuffer *suck_start(classinfo *c)
512 list_classpath_entry *lce;
521 /* initialize return value */
525 /* get the classname as char string (do it here for the warning at
526 the end of the function) */
528 filenamelen = utf_bytes(c->name) + strlen(".class") + strlen("0");
529 filename = MNEW(char, filenamelen);
531 utf_copy(filename, c->name);
532 strcat(filename, ".class");
534 /* walk through all classpath entries */
536 for (lce = list_first(list_classpath_entries); lce != NULL && cb == NULL;
537 lce = list_next(list_classpath_entries, lce)) {
538 #if defined(ENABLE_ZLIB)
539 if (lce->type == CLASSPATH_ARCHIVE) {
541 /* enter a monitor on zip/jar archives */
543 LOCK_MONITOR_ENTER(lce);
545 /* try to get the file in current archive */
547 cb = zip_get(lce, c);
549 /* leave the monitor */
551 LOCK_MONITOR_EXIT(lce);
554 #endif /* defined(ENABLE_ZLIB) */
555 path = MNEW(char, lce->pathlen + filenamelen);
556 strcpy(path, lce->path);
557 strcat(path, filename);
559 classfile = fopen(path, "r");
561 if (classfile) { /* file exists */
562 if (!stat(path, &buffer)) { /* read classfile data */
563 cb = NEW(classbuffer);
565 cb->size = buffer.st_size;
566 cb->data = MNEW(u1, cb->size);
568 cb->path = lce->path;
570 /* read class data */
572 len = fread(cb->data, 1, cb->size, classfile);
574 if (len != buffer.st_size) {
576 /* if (ferror(classfile)) { */
580 /* close the class file */
586 MFREE(path, char, lce->pathlen + filenamelen);
587 #if defined(ENABLE_ZLIB)
594 dolog("Warning: Can not open class file '%s'", filename);
596 MFREE(filename, char, filenamelen);
602 /* suck_stop *******************************************************************
604 Frees memory for buffer with classfile data.
606 CAUTION: This function may only be called if buffer has been
607 allocated by suck_start with reading a file.
609 *******************************************************************************/
611 void suck_stop(classbuffer *cb)
615 MFREE(cb->data, u1, cb->size);
616 FREE(cb, classbuffer);
621 * These are local overrides for various environment variables in Emacs.
622 * Please do not remove this and leave it at the end of the file, where
623 * Emacs will automagically detect them.
624 * ---------------------------------------------------------------------
627 * indent-tabs-mode: t