/* Utility routines for finding and reading Java(TM) .class files.
- Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
+ Copyright (C) 1996, 1997, 1998, 1999, 2000, 2002, 2003, 2004, 2005,
+ 2006, 2007 Free Software Foundation, Inc.
-This program is free software; you can redistribute it and/or modify
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
-This program is distributed in the hope that it will be useful,
+GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA.
+along with GCC; see the file COPYING. If not, write to
+the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA.
Java and all Java-based marks are trademarks or registered trademarks
of Sun Microsystems, Inc. in the United States and other countries.
#include "config.h"
#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
#include "jcf.h"
#include "tree.h"
#include "toplev.h"
#include "java-tree.h"
+#include "hashtab.h"
+#if JCF_USE_SCANDIR
+#include <dirent.h>
+#include <fnmatch.h>
+#endif
#include "zlib.h"
#endif
int
-DEFUN(jcf_unexpected_eof, (jcf, count),
- JCF *jcf AND int count ATTRIBUTE_UNUSED)
+jcf_unexpected_eof (JCF *jcf, int count ATTRIBUTE_UNUSED)
{
if (jcf->filename)
fprintf (stderr, "Premature end of .class file %s.\n", jcf->filename);
}
void
-DEFUN(jcf_trim_old_input, (jcf),
- JCF *jcf)
+jcf_trim_old_input (JCF *jcf)
{
int count = jcf->read_ptr - jcf->buffer;
if (count > 0)
}
int
-DEFUN(jcf_filbuf_from_stdio, (jcf, count),
- JCF *jcf AND int count)
+jcf_filbuf_from_stdio (JCF *jcf, int count)
{
FILE *file = (FILE*) (jcf->read_state);
if (count > jcf->buffer_end - jcf->read_ptr)
*/
ZipFile *
-DEFUN(opendir_in_zip, (zipfile, is_system),
- const char *zipfile AND int is_system)
+opendir_in_zip (const char *zipfile, int is_system)
{
struct ZipFile* zipf;
char magic [4];
zipf->next = SeenZipFiles;
zipf->name = (char*)(zipf+1);
strcpy (zipf->name, zipfile);
- SeenZipFiles = zipf;
fd = open (zipfile, O_RDONLY | O_BINARY);
zipf->fd = fd;
if (fd < 0)
{
jcf_dependency_add_file (zipfile, is_system);
if (read (fd, magic, 4) != 4 || GET_u4 (magic) != (JCF_u4)ZIPMAGIC)
- return NULL;
+ {
+ free (zipf);
+ close (fd);
+ return NULL;
+ }
lseek (fd, 0L, SEEK_SET);
if (read_zip_archive (zipf) != 0)
- return NULL;
+ {
+ free (zipf);
+ close (fd);
+ return NULL;
+ }
}
+
+ SeenZipFiles = zipf;
return zipf;
}
*/
int
-DEFUN(open_in_zip, (jcf, zipfile, zipmember, is_system),
- JCF *jcf AND const char *zipfile AND const char *zipmember
- AND int is_system)
+open_in_zip (JCF *jcf, const char *zipfile, const char *zipmember,
+ int is_system)
{
ZipDirectory *zipd;
int i, len;
/* Read data from zip archive member. */
int
-DEFUN(read_zip_member, (jcf, zipd, zipf),
- JCF *jcf AND ZipDirectory *zipd AND ZipFile *zipf)
+read_zip_member (JCF *jcf, ZipDirectory *zipd, ZipFile *zipf)
{
- jcf->filbuf = jcf_unexpected_eof;
- jcf->zipd = (void *)zipd;
-
- if (zipd->compression_method == Z_NO_COMPRESSION)
- {
- jcf->buffer = ALLOC (zipd->size);
- jcf->buffer_end = jcf->buffer + zipd->size;
- jcf->read_ptr = jcf->buffer;
- jcf->read_end = jcf->buffer_end;
- if (lseek (zipf->fd, zipd->filestart, 0) < 0
- || read (zipf->fd, jcf->buffer, zipd->size) != (long) zipd->size)
- return -2;
- }
- else
- {
- char *buffer;
- z_stream d_stream; /* decompression stream */
- d_stream.zalloc = (alloc_func) 0;
- d_stream.zfree = (free_func) 0;
- d_stream.opaque = (voidpf) 0;
-
- jcf->buffer = ALLOC (zipd->uncompressed_size);
- d_stream.next_out = jcf->buffer;
- d_stream.avail_out = zipd->uncompressed_size;
- jcf->buffer_end = jcf->buffer + zipd->uncompressed_size;
- jcf->read_ptr = jcf->buffer;
- jcf->read_end = jcf->buffer_end;
- buffer = ALLOC (zipd->size);
- d_stream.next_in = buffer;
- d_stream.avail_in = zipd->size;
- if (lseek (zipf->fd, zipd->filestart, 0) < 0
- || read (zipf->fd, buffer, zipd->size) != (long) zipd->size)
- return -2;
- /* Handle NO_HEADER using undocumented zlib feature.
- This is a very common hack. */
- inflateInit2 (&d_stream, -MAX_WBITS);
- inflate (&d_stream, Z_NO_FLUSH);
- inflateEnd (&d_stream);
- FREE (buffer);
- }
+ jcf->filbuf = jcf_unexpected_eof;
+ jcf->zipd = zipd;
- return 0;
-}
-
-#if JCF_USE_STDIO
-const char *
-DEFUN(open_class, (filename, jcf, stream, dep_name),
- const char *filename AND JCF *jcf AND FILE* stream
- AND const char *dep_name)
-{
- if (jcf)
+ if (zipd->compression_method == Z_NO_COMPRESSION)
{
- if (dep_name != NULL)
- jcf_dependency_add_file (dep_name, 0);
- JCF_ZERO (jcf);
- jcf->buffer = NULL;
- jcf->buffer_end = NULL;
- jcf->read_ptr = NULL;
- jcf->read_end = NULL;
- jcf->read_state = stream;
- jcf->filename = filename;
- jcf->filbuf = jcf_filbuf_from_stdio;
+ jcf->buffer = XNEWVEC (unsigned char, zipd->size);
+ jcf->buffer_end = jcf->buffer + zipd->size;
+ jcf->read_ptr = jcf->buffer;
+ jcf->read_end = jcf->buffer_end;
+ if (lseek (zipf->fd, zipd->filestart, 0) < 0
+ || read (zipf->fd, jcf->buffer, zipd->size) != (long) zipd->size)
+ return -2;
}
else
- fclose (stream);
- return filename;
+ {
+ char *buffer;
+ z_stream d_stream; /* decompression stream */
+ d_stream.zalloc = (alloc_func) 0;
+ d_stream.zfree = (free_func) 0;
+ d_stream.opaque = (voidpf) 0;
+
+ jcf->buffer = XNEWVEC (unsigned char, zipd->uncompressed_size);
+ d_stream.next_out = jcf->buffer;
+ d_stream.avail_out = zipd->uncompressed_size;
+ jcf->buffer_end = jcf->buffer + zipd->uncompressed_size;
+ jcf->read_ptr = jcf->buffer;
+ jcf->read_end = jcf->buffer_end;
+ buffer = XNEWVEC (char, zipd->size);
+ d_stream.next_in = (unsigned char *) buffer;
+ d_stream.avail_in = zipd->size;
+ if (lseek (zipf->fd, zipd->filestart, 0) < 0
+ || read (zipf->fd, buffer, zipd->size) != (long) zipd->size)
+ return -2;
+ /* Handle NO_HEADER using undocumented zlib feature.
+ This is a very common hack. */
+ inflateInit2 (&d_stream, -MAX_WBITS);
+ inflate (&d_stream, Z_NO_FLUSH);
+ inflateEnd (&d_stream);
+ free (buffer);
+ }
+
+ return 0;
}
-#else
+
const char *
-DEFUN(open_class, (filename, jcf, fd, dep_name),
- const char *filename AND JCF *jcf AND int fd AND const char *dep_name)
+open_class (const char *filename, JCF *jcf, int fd, const char *dep_name)
{
if (jcf)
{
if (dep_name != NULL)
jcf_dependency_add_file (dep_name, 0);
JCF_ZERO (jcf);
- jcf->buffer = ALLOC (stat_buf.st_size);
+ jcf->buffer = XNEWVEC (unsigned char, stat_buf.st_size);
jcf->buffer_end = jcf->buffer + stat_buf.st_size;
jcf->read_ptr = jcf->buffer;
jcf->read_end = jcf->buffer_end;
jcf->read_state = NULL;
- jcf->filename = filename;
+ jcf->filename = xstrdup (filename);
if (read (fd, jcf->buffer, stat_buf.st_size) != stat_buf.st_size)
{
perror ("Failed to read .class file");
close (fd);
return filename;
}
-#endif
const char *
-DEFUN(find_classfile, (filename, jcf, dep_name),
- char *filename AND JCF *jcf AND const char *dep_name)
+find_classfile (char *filename, JCF *jcf, const char *dep_name)
{
-#if JCF_USE_STDIO
- FILE *stream = fopen (filename, "rb");
- if (stream == NULL)
- return NULL;
- return open_class (arg, jcf, stream, dep_name);
-#else
int fd = open (filename, O_RDONLY | O_BINARY);
if (fd < 0)
return NULL;
return open_class (filename, jcf, fd, dep_name);
+}
+
+#if JCF_USE_SCANDIR
+
+/* A comparison function (as for qsort) that compares KEY (a char *
+ giving the basename of a file) with the name stored in ENTRY (a
+ dirent **). */
+
+static int
+compare_path (const void *key, const void *entry)
+{
+ return strcmp ((const char *) key,
+ (*((const struct dirent **) entry))->d_name);
+}
+
+/* Returns nonzero if ENTRY names a .java or .class file. */
+
+static int
+java_or_class_file (const struct dirent *entry)
+{
+ const char *base = lbasename (entry->d_name);
+ return (fnmatch ("*.java", base, 0) == 0 ||
+ fnmatch ("*.class", base, 0) == 0);
+}
+
+/* Information about the files present in a particular directory. */
+typedef struct memoized_dirlist_entry
+{
+ /* The name of the directory. */
+ const char *dir;
+ /* The number of .java and .class files present, or -1 if we could
+ not, for some reason, obtain the list. */
+ int num_files;
+ /* The .java and .class files in the directory, in alphabetical
+ order. */
+ struct dirent **files;
+} memoized_dirlist_entry;
+
+/* A hash function for a memoized_dirlist_entry. */
+static hashval_t
+memoized_dirlist_hash (const void *entry)
+{
+ const memoized_dirlist_entry *mde = (const memoized_dirlist_entry *) entry;
+ return htab_hash_string (mde->dir);
+}
+
+/* Returns true if ENTRY (a memoized_dirlist_entry *) corresponds to
+ the directory given by KEY (a char *) giving the directory
+ name. */
+
+static int
+memoized_dirlist_lookup_eq (const void *entry, const void *key)
+{
+ return strcmp ((const char *) key,
+ ((const memoized_dirlist_entry *) entry)->dir) == 0;
+}
+
+/* A hash table mapping directory names to the lists of .java and
+ .class files in that directory. */
+
+static htab_t memoized_dirlists;
+
#endif
+
+/* Like stat, but avoids actually making the stat system call if we
+ know that it cannot succeed. FILENAME and BUF are as for stat. */
+
+static int
+caching_stat (char *filename, struct stat *buf)
+{
+#if JCF_USE_SCANDIR
+ char *sep;
+ char origsep = 0;
+ char *base;
+ memoized_dirlist_entry *dent;
+ void **slot;
+ struct memoized_dirlist_entry temp;
+
+ /* If the hashtable has not already been created, create it now. */
+ if (!memoized_dirlists)
+ memoized_dirlists = htab_create (37,
+ memoized_dirlist_hash,
+ memoized_dirlist_lookup_eq,
+ NULL);
+
+ /* Get the name of the directory. */
+ sep = strrchr (filename, DIR_SEPARATOR);
+#ifdef DIR_SEPARATOR_2
+ if (! sep)
+ sep = strrchr (filename, DIR_SEPARATOR_2);
+#endif
+ if (sep)
+ {
+ origsep = *sep;
+ *sep = '\0';
+ base = sep + 1;
+ }
+ else
+ base = filename;
+
+ /* Obtain the entry for this directory from the hash table. This
+ approach is ok since we know that the hash function only looks at
+ the directory name. */
+ temp.dir = filename;
+ temp.num_files = 0;
+ temp.files = NULL;
+ slot = htab_find_slot (memoized_dirlists, &temp, INSERT);
+ if (!*slot)
+ {
+ /* We have not already scanned this directory; scan it now. */
+ dent = XNEW (memoized_dirlist_entry);
+ dent->dir = xstrdup (filename);
+ /* Unfortunately, scandir is not fully standardized. In
+ particular, the type of the function pointer passed as the
+ third argument sometimes takes a "const struct dirent *"
+ parameter, and sometimes just a "struct dirent *". We cast
+ to (void *) and use __extension__ so that either way it is
+ quietly accepted. FIXME: scandir is not in POSIX. */
+ dent->num_files = __extension__ scandir (filename, &dent->files,
+ (void *) java_or_class_file,
+ alphasort);
+ *slot = dent;
+ }
+ else
+ dent = *((memoized_dirlist_entry **) slot);
+
+ /* Put the separator back. */
+ if (sep)
+ *sep = origsep;
+
+ /* If the file is not in the list, there is no need to stat it; it
+ does not exist. */
+ if (dent->num_files != -1
+ && !bsearch (base, dent->files, dent->num_files,
+ sizeof (struct dirent *), compare_path))
+ return -1;
+#endif
+
+ return stat (filename, buf);
}
+/* Returns 1 if the CLASSNAME (really a char *) matches the name
+ stored in TABLE_ENTRY (also a char *). */
+
+static int
+memoized_class_lookup_eq (const void *table_entry, const void *classname)
+{
+ return strcmp ((const char *)classname, (const char *)table_entry) == 0;
+}
+
+/* A hash table keeping track of class names that were not found
+ during class lookup. (There is no need to cache the values
+ associated with names that were found; they are saved in
+ IDENTIFIER_CLASS_VALUE.) */
+static htab_t memoized_class_lookups;
+
/* Returns a freshly malloc'd string with the fully qualified pathname
- of the .class file for the class CLASSNAME. Returns NULL on
- failure. If JCF != NULL, it is suitably initialized.
- SOURCE_OK is true if we should also look for .java file. */
+ of the .class file for the class CLASSNAME. CLASSNAME must be
+ allocated in permanent storage; this function may retain a pointer
+ to it. Returns NULL on failure. If JCF != NULL, it is suitably
+ initialized. SOURCE_OK is true if we should also look for .java
+ file. */
const char *
-DEFUN(find_class, (classname, classname_length, jcf, source_ok),
- const char *classname AND int classname_length AND JCF *jcf AND int source_ok)
-
+find_class (const char *classname, int classname_length, JCF *jcf)
{
-#if JCF_USE_STDIO
- FILE *stream;
-#else
int fd;
-#endif
- int i, k, java = -1, class = -1;
- struct stat java_buf, class_buf;
+ int i, k, class = -1;
+ struct stat class_buf;
char *dep_file;
void *entry;
- char *java_buffer;
+ int buflen;
+ char *buffer;
+ hashval_t hash;
+
+ /* Create the hash table, if it does not already exist. */
+ if (!memoized_class_lookups)
+ memoized_class_lookups = htab_create (37,
+ htab_hash_string,
+ memoized_class_lookup_eq,
+ NULL);
+
+ /* Loop for this class in the hashtable. If it is present, we've
+ already looked for this class and failed to find it. */
+ hash = htab_hash_string (classname);
+ if (htab_find_with_hash (memoized_class_lookups, classname, hash))
+ return NULL;
/* Allocate and zero out the buffer, since we don't explicitly put a
null pointer when we're copying it below. */
- int buflen = jcf_path_max_len () + classname_length + 10;
- char *buffer = (char *) ALLOC (buflen);
+ buflen = jcf_path_max_len () + classname_length + 10;
+ buffer = ALLOC (buflen);
memset (buffer, 0, buflen);
- java_buffer = (char *) alloca (buflen);
-
- jcf->java_source = 0;
-
for (entry = jcf_path_start (); entry != NULL; entry = jcf_path_next (entry))
{
const char *path_name = jcf_path_name (entry);
else
continue;
}
- class = stat (buffer, &class_buf);
- }
-
- if (source_ok)
- {
- /* Compute name of .java file. */
- int l, m;
- strcpy (java_buffer, path_name);
- l = strlen (java_buffer);
- for (m = 0; m < classname_length; ++m)
- java_buffer[m + l] = (classname[m] == '.' ? '/' : classname[m]);
- strcpy (java_buffer + m + l, ".java");
- java = stat (java_buffer, &java_buf);
- if (java == 0)
- break;
+ class = caching_stat(buffer, &class_buf);
}
}
- /* We preferably pick a class file if we have a chance. If the source
- file is newer than the class file, we issue a warning and parse the
- source file instead.
- There should be a flag to allow people have the class file picked
- up no matter what. FIXME. */
- if (! java && ! class && java_buf.st_mtime > class_buf.st_mtime)
- {
- if (flag_newer)
- warning ("source file for class `%s' is newer than its matching class file. Source file `%s' used instead", classname, java_buffer);
- class = -1;
- }
-
- if (! java)
- dep_file = java_buffer;
- else
- dep_file = buffer;
-#if JCF_USE_STDIO
- if (!class)
- {
- SOURCE_FRONTEND_DEBUG (("Trying %s", buffer));
- stream = fopen (buffer, "rb");
- if (stream)
- goto found;
- }
- /* Give .java a try, if necessary */
- if (!java)
- {
- strcpy (buffer, java_buffer);
- SOURCE_FRONTEND_DEBUG (("Trying %s", buffer));
- stream = fopen (buffer, "r");
- if (stream)
- {
- jcf->java_source = 1;
- goto found;
- }
- }
-#else
+ dep_file = buffer;
if (!class)
{
SOURCE_FRONTEND_DEBUG ((stderr, "[Class selected: %s]\n",
classname+classname_length-
(classname_length <= 30 ?
classname_length : 30)));
- fd = open (buffer, O_RDONLY | O_BINARY);
+ fd = JCF_OPEN_EXACT_CASE (buffer, O_RDONLY | O_BINARY);
if (fd >= 0)
goto found;
}
- /* Give .java a try, if necessary */
- if (!java)
- {
- strcpy (buffer, java_buffer);
- SOURCE_FRONTEND_DEBUG ((stderr, "[Source selected: %s]\n",
- classname+classname_length-
- (classname_length <= 30 ?
- classname_length : 30)));
- fd = open (buffer, O_RDONLY);
- if (fd >= 0)
- {
- jcf->java_source = 1;
- goto found;
- }
- }
-#endif
free (buffer);
+
+ /* Remember that this class could not be found so that we do not
+ have to look again. */
+ *htab_find_slot_with_hash (memoized_class_lookups, classname, hash, INSERT)
+ = (void *) classname;
+
return NULL;
found:
-#if JCF_USE_STDIO
- if (jcf->java_source)
- return NULL; /* FIXME */
- else
- return open_class (buffer, jcf, stream, dep_file);
-#else
- if (jcf->java_source)
- {
- JCF_ZERO (jcf); /* JCF_FINISH relies on this */
- jcf->java_source = 1;
- jcf->filename = xstrdup (buffer);
- close (fd); /* We use STDIO for source file */
- }
- else
- buffer = (char *) open_class (buffer, jcf, fd, dep_file);
+ buffer = (char *) open_class (buffer, jcf, fd, dep_file);
jcf->classname = xstrdup (classname);
return buffer;
-#endif
}
void
-DEFUN(jcf_print_char, (stream, ch),
- FILE *stream AND int ch)
+jcf_print_char (FILE *stream, int ch)
{
switch (ch)
{
/* Print UTF8 string at STR of length LENGTH bytes to STREAM. */
void
-DEFUN(jcf_print_utf8, (stream, str, length),
- FILE *stream AND register const unsigned char *str AND int length)
+jcf_print_utf8 (FILE *stream, const unsigned char *str, int length)
{
const unsigned char * limit = str + length;
while (str < limit)
/* Same as jcf_print_utf8, but print IN_CHAR as OUT_CHAR. */
void
-DEFUN(jcf_print_utf8_replace, (stream, str, length, in_char, out_char),
- FILE *stream AND const unsigned char *str AND int length
- AND int in_char AND int out_char)
+jcf_print_utf8_replace (FILE *stream, const unsigned char *str, int length,
+ int in_char, int out_char)
{
const unsigned char *limit = str + length;
while (str < limit)
any classes, fields, or methods are valid.*/
int
-DEFUN(verify_constant_pool, (jcf),
- JCF *jcf)
+verify_constant_pool (JCF *jcf)
{
int i, n;
for (i = 1; i < JPOOL_SIZE (jcf); i++)
}
void
-DEFUN(format_uint, (buffer, value, base),
- char *buffer AND uint64 value AND int base)
+format_uint (char *buffer, uint64 value, int base)
{
#define WRITE_BUF_SIZE (4 + sizeof(uint64) * 8)
char buf[WRITE_BUF_SIZE];
- register char *buf_ptr = buf+WRITE_BUF_SIZE; /* End of buf. */
+ char *buf_ptr = buf+WRITE_BUF_SIZE; /* End of buf. */
int chars_written;
int i;
}
void
-DEFUN(format_int, (buffer, value, base),
- char *buffer AND jlong value AND int base)
+format_int (char *buffer, jlong value, int base)
{
uint64 abs_value;
if (value < 0)
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