1 /* src/vm/suck.cpp - functions to read LE ordered types from a buffer
3 Copyright (C) 1996-2005, 2006, 2007, 2008
4 CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
6 This file is part of CACAO.
8 This program is free software; you can redistribute it and/or
9 modify it under the terms of the GNU General Public License as
10 published by the Free Software Foundation; either version 2, or (at
11 your option) any later version.
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
35 #include "mm/memory.hpp"
37 #include "threads/mutex.hpp"
39 #include "toolbox/list.hpp"
40 #include "toolbox/logging.hpp"
41 #include "toolbox/util.h"
43 #include "vm/exceptions.hpp"
44 #include "vm/loader.hpp"
45 #include "vm/options.h"
47 #include "vm/properties.hpp"
48 #include "vm/suck.hpp"
53 /* global variables ***********************************************************/
55 List<list_classpath_entry*>* list_classpath_entries;
58 /* suck_init *******************************************************************
60 Initializes the suck subsystem like initializing the classpath
63 *******************************************************************************/
67 TRACESUBSYSTEMINITIALIZATION("suck_init");
69 #warning Move this list into VM.
70 list_classpath_entries = new List<list_classpath_entry*>();
78 /* scandir_filter **************************************************************
80 Filters for zip/jar files.
82 *******************************************************************************/
84 static int scandir_filter(const struct dirent *a)
88 #if defined(_DIRENT_HAVE_D_NAMLEN)
91 namlen = strlen(a->d_name);
94 if ((strncasecmp(a->d_name + namlen - 4, ".zip", 4) == 0) ||
95 (strncasecmp(a->d_name + namlen - 4, ".jar", 4) == 0))
102 /* suck_add ********************************************************************
104 Adds a classpath to the global classpath entries list.
106 *******************************************************************************/
108 void suck_add(char *classpath)
110 list_classpath_entry *lce;
118 #if defined(ENABLE_ZLIB)
122 /* parse the classpath string */
124 for (start = classpath; (*start) != '\0'; ) {
126 /* search for ':' delimiter to get the end of the current entry */
127 for (end = start; ((*end) != '\0') && ((*end) != ':'); end++);
131 filenamelen = end - start;
133 if (filenamelen > 4) {
134 if ((strncasecmp(end - 4, ".zip", 4) == 0) ||
135 (strncasecmp(end - 4, ".jar", 4) == 0)) {
140 /* save classpath entries as absolute pathnames */
145 if (*start != '/') { /* XXX fix me for win32 */
147 cwdlen = strlen(cwd) + strlen("/");
150 /* allocate memory for filename and fill it */
152 filename = MNEW(char, filenamelen + cwdlen + strlen("/") +
156 strcpy(filename, cwd);
157 strcat(filename, "/");
158 strncat(filename, start, filenamelen);
160 /* add cwd length to file length */
161 filenamelen += cwdlen;
164 strncpy(filename, start, filenamelen);
165 filename[filenamelen] = '\0';
171 #if defined(ENABLE_ZLIB)
172 ht = zip_open(filename);
175 lce = NEW(list_classpath_entry);
177 lce->type = CLASSPATH_ARCHIVE;
179 lce->path = filename;
180 lce->pathlen = filenamelen;
182 /* SUN compatible -verbose:class output */
184 if (opt_verboseclass)
185 printf("[Opened %s]\n", filename);
189 os::abort("suck_add: zip/jar files not supported");
193 if (filename[filenamelen - 1] != '/') {/* XXX fixme for win32 */
194 filename[filenamelen] = '/';
195 filename[filenamelen + 1] = '\0';
199 lce = NEW(list_classpath_entry);
201 lce->type = CLASSPATH_PATH;
202 lce->path = filename;
203 lce->pathlen = filenamelen;
206 /* add current classpath entry, if no error */
209 list_classpath_entries->push_back(lce);
212 /* goto next classpath entry, skip ':' delimiter */
222 /* suck_add_from_property ******************************************************
224 Adds a classpath form a property entry to the global classpath
227 *******************************************************************************/
229 void suck_add_from_property(const char *key)
235 struct dirent **namelist;
241 // Get the property value.
242 Properties& properties = VM::get_current()->get_properties();
243 value = properties.get(key);
248 /* get the directory entries of the property */
250 for (start = value; (*start) != '\0'; ) {
252 /* search for ':' delimiter to get the end of the current entry */
254 for (end = start; ((*end) != '\0') && ((*end) != ':'); end++);
259 /* allocate memory for the path entry */
261 pathlen = end - start;
262 char* path = MNEW(char, pathlen + strlen("0"));
264 /* copy and terminate the string */
266 strncpy(path, start, pathlen);
267 path[pathlen] = '\0';
269 /* Reset namelist to NULL for the freeing in an error case
274 /* scan the directory found for zip/jar files */
276 n = os::scandir((const char*) path, &namelist, &scandir_filter, (int (*)(const void*, const void*)) &alphasort);
278 /* On error, just continue, this should be ok. */
281 for (i = 0; i < n; i++) {
282 #if defined(_DIRENT_HAVE_D_NAMLEN)
283 namlen = namelist[i]->d_namlen;
285 namlen = strlen(namelist[i]->d_name);
288 /* Allocate memory for bootclasspath. */
290 // FIXME Make boot_class_path const char*.
291 char* boot_class_path = (char*) properties.get("sun.boot.class.path");
294 pathlen + strlen("/") + namlen +
296 strlen(boot_class_path) +
299 /* Prepend the file found to the bootclasspath. */
303 strcat(p, namelist[i]->d_name);
305 strcat(p, boot_class_path);
307 properties.put("sun.boot.class.path", p);
308 properties.put("java.boot.class.path", p);
310 MFREE(boot_class_path, char, strlen(boot_class_path));
312 /* free the memory allocated by scandir */
313 /* (We use `free` as the memory came from the C library.) */
319 /* On some systems (like Linux) when n == 0, then namelist
320 returned from scnadir is NULL, thus we don't have to
322 (Use `free` as the memory came from the C library.) */
324 if (namelist != NULL)
327 MFREE(path, char, pathlen + strlen("0"));
330 /* goto next entry, skip ':' delimiter */
340 /* suck_check_classbuffer_size *************************************************
342 Assert that at least <len> bytes are left to read <len> is limited
343 to the range of non-negative s4 values.
345 *******************************************************************************/
347 bool suck_check_classbuffer_size(classbuffer *cb, s4 len)
349 #ifdef ENABLE_VERIFIER
350 if (len < 0 || ((cb->data + cb->size) - cb->pos) < len) {
351 exceptions_throw_classformaterror(cb->clazz, "Truncated class file");
354 #endif /* ENABLE_VERIFIER */
360 u1 suck_u1(classbuffer *cb)
364 a = SUCK_BE_U1(cb->pos);
371 u2 suck_u2(classbuffer *cb)
375 a = SUCK_BE_U2(cb->pos);
382 u4 suck_u4(classbuffer *cb)
386 a = SUCK_BE_U4(cb->pos);
393 u8 suck_u8(classbuffer *cb)
397 a = SUCK_BE_U8(cb->pos);
404 float suck_float(classbuffer *cb)
408 #if WORDS_BIGENDIAN == 0
412 for (i = 0; i < 4; i++)
413 buffer[3 - i] = suck_u1(cb);
415 MCOPY((u1 *) (&f), buffer, u1, 4);
417 suck_nbytes((u1*) (&f), cb, 4);
420 assert(sizeof(float) == 4);
426 double suck_double(classbuffer *cb)
430 #if WORDS_BIGENDIAN == 0
434 # if defined(__ARM__) && defined(__ARMEL__) && !defined(__VFP_FP__)
436 * On little endian ARM processors when using FPA, word order
437 * of doubles is still big endian. So take that into account
438 * here. When using VFP, word order of doubles follows byte
439 * order. (michi 2005/07/24)
441 for (i = 0; i < 4; i++)
442 buffer[3 - i] = suck_u1(cb);
443 for (i = 0; i < 4; i++)
444 buffer[7 - i] = suck_u1(cb);
446 for (i = 0; i < 8; i++)
447 buffer[7 - i] = suck_u1(cb);
448 # endif /* defined(__ARM__) && ... */
450 MCOPY((u1 *) (&d), buffer, u1, 8);
452 suck_nbytes((u1*) (&d), cb, 8);
455 assert(sizeof(double) == 8);
461 /* suck_nbytes *****************************************************************
463 Transfer block of classfile data into a buffer.
465 *******************************************************************************/
467 void suck_nbytes(u1 *buffer, classbuffer *cb, s4 len)
469 MCOPY(buffer, cb->pos, u1, len);
474 /* suck_skip_nbytes ************************************************************
476 Skip block of classfile data.
478 *******************************************************************************/
480 void suck_skip_nbytes(classbuffer *cb, s4 len)
486 /* suck_start ******************************************************************
488 Returns true if classbuffer is already loaded or a file for the
489 specified class has succussfully been read in. All directories of
490 the searchpath are used to find the classfile (<classname>.class).
491 Returns NULL if no classfile is found and writes an error message.
493 *******************************************************************************/
495 classbuffer *suck_start(classinfo *c)
497 list_classpath_entry *lce;
506 /* initialize return value */
510 /* get the classname as char string (do it here for the warning at
511 the end of the function) */
513 filenamelen = utf_bytes(c->name) + strlen(".class") + strlen("0");
514 filename = MNEW(char, filenamelen);
516 utf_copy(filename, c->name);
517 strcat(filename, ".class");
519 /* walk through all classpath entries */
521 for (List<list_classpath_entry*>::iterator it = list_classpath_entries->begin(); it != list_classpath_entries->end() && cb == NULL; it++) {
524 #if defined(ENABLE_ZLIB)
525 if (lce->type == CLASSPATH_ARCHIVE) {
527 /* enter a monitor on zip/jar archives */
531 /* try to get the file in current archive */
533 cb = zip_get(lce, c);
535 /* leave the monitor */
537 lce->mutex->unlock();
540 #endif /* defined(ENABLE_ZLIB) */
541 path = MNEW(char, lce->pathlen + filenamelen);
542 strcpy(path, lce->path);
543 strcat(path, filename);
545 classfile = os::fopen(path, "r");
547 if (classfile) { /* file exists */
548 if (!os::stat(path, &buffer)) { /* read classfile data */
549 cb = NEW(classbuffer);
551 cb->size = buffer.st_size;
552 cb->data = MNEW(u1, cb->size);
554 cb->path = lce->path;
556 /* read class data */
558 len = os::fread((void *) cb->data, 1, cb->size,
561 if (len != buffer.st_size) {
563 /* if (ferror(classfile)) { */
567 /* close the class file */
569 os::fclose(classfile);
573 MFREE(path, char, lce->pathlen + filenamelen);
574 #if defined(ENABLE_ZLIB)
581 dolog("Warning: Can not open class file '%s'", filename);
583 MFREE(filename, char, filenamelen);
589 /* suck_stop *******************************************************************
591 Frees memory for buffer with classfile data.
593 CAUTION: This function may only be called if buffer has been
594 allocated by suck_start with reading a file.
596 *******************************************************************************/
598 void suck_stop(classbuffer *cb)
602 MFREE(cb->data, u1, cb->size);
603 FREE(cb, classbuffer);
608 * These are local overrides for various environment variables in Emacs.
609 * Please do not remove this and leave it at the end of the file, where
610 * Emacs will automagically detect them.
611 * ---------------------------------------------------------------------
614 * indent-tabs-mode: t
618 * vim:noexpandtab:sw=4:ts=4: