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-rw-r--r--cache.h3
-rw-r--r--read-cache.c83
2 files changed, 33 insertions, 53 deletions
diff --git a/cache.h b/cache.h
index 2e6ad36..15c619d 100644
--- a/cache.h
+++ b/cache.h
@@ -306,7 +306,7 @@ static inline unsigned int canon_mode(unsigned int mode)
}
#define flexible_size(STRUCT,len) ((offsetof(struct STRUCT,name) + (len) + 8) & ~7)
-#define cache_entry_size(len) flexible_size(cache_entry,len)
+#define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1)
#define ondisk_cache_entry_size(len) flexible_size(ondisk_cache_entry,len)
#define ondisk_cache_entry_extended_size(len) flexible_size(ondisk_cache_entry_extended,len)
@@ -316,7 +316,6 @@ struct index_state {
struct string_list *resolve_undo;
struct cache_tree *cache_tree;
struct cache_time timestamp;
- void *alloc;
unsigned name_hash_initialized : 1,
initialized : 1;
struct hash_table name_hash;
diff --git a/read-cache.c b/read-cache.c
index 27e9fc6..a51bba1 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -1224,29 +1224,18 @@ int read_index(struct index_state *istate)
return read_index_from(istate, get_index_file());
}
-static void convert_from_disk(struct ondisk_cache_entry *ondisk, struct cache_entry *ce)
+static struct cache_entry *create_from_disk(struct ondisk_cache_entry *ondisk)
{
+ struct cache_entry *ce;
size_t len;
const char *name;
+ unsigned int flags;
- ce->ce_ctime.sec = ntohl(ondisk->ctime.sec);
- ce->ce_mtime.sec = ntohl(ondisk->mtime.sec);
- ce->ce_ctime.nsec = ntohl(ondisk->ctime.nsec);
- ce->ce_mtime.nsec = ntohl(ondisk->mtime.nsec);
- ce->ce_dev = ntohl(ondisk->dev);
- ce->ce_ino = ntohl(ondisk->ino);
- ce->ce_mode = ntohl(ondisk->mode);
- ce->ce_uid = ntohl(ondisk->uid);
- ce->ce_gid = ntohl(ondisk->gid);
- ce->ce_size = ntohl(ondisk->size);
/* On-disk flags are just 16 bits */
- ce->ce_flags = ntohs(ondisk->flags);
-
- hashcpy(ce->sha1, ondisk->sha1);
+ flags = ntohs(ondisk->flags);
+ len = flags & CE_NAMEMASK;
- len = ce->ce_flags & CE_NAMEMASK;
-
- if (ce->ce_flags & CE_EXTENDED) {
+ if (flags & CE_EXTENDED) {
struct ondisk_cache_entry_extended *ondisk2;
int extended_flags;
ondisk2 = (struct ondisk_cache_entry_extended *)ondisk;
@@ -1254,7 +1243,7 @@ static void convert_from_disk(struct ondisk_cache_entry *ondisk, struct cache_en
/* We do not yet understand any bit out of CE_EXTENDED_FLAGS */
if (extended_flags & ~CE_EXTENDED_FLAGS)
die("Unknown index entry format %08x", extended_flags);
- ce->ce_flags |= extended_flags;
+ flags |= extended_flags;
name = ondisk2->name;
}
else
@@ -1262,25 +1251,26 @@ static void convert_from_disk(struct ondisk_cache_entry *ondisk, struct cache_en
if (len == CE_NAMEMASK)
len = strlen(name);
- /*
- * NEEDSWORK: If the original index is crafted, this copy could
- * go unchecked.
- */
- memcpy(ce->name, name, len + 1);
-}
-static inline size_t estimate_cache_size(size_t ondisk_size, unsigned int entries)
-{
- size_t fix_size_mem = offsetof(struct cache_entry, name);
- size_t fix_size_dsk = offsetof(struct ondisk_cache_entry, name);
- long per_entry = (fix_size_mem - fix_size_dsk + 7) & ~7;
+ ce = xmalloc(cache_entry_size(len));
- /*
- * Alignment can cause differences. This should be "alignof", but
- * since that's a gcc'ism, just use the size of a pointer.
- */
- per_entry += sizeof(void *);
- return ondisk_size + entries*per_entry;
+ ce->ce_ctime.sec = ntohl(ondisk->ctime.sec);
+ ce->ce_mtime.sec = ntohl(ondisk->mtime.sec);
+ ce->ce_ctime.nsec = ntohl(ondisk->ctime.nsec);
+ ce->ce_mtime.nsec = ntohl(ondisk->mtime.nsec);
+ ce->ce_dev = ntohl(ondisk->dev);
+ ce->ce_ino = ntohl(ondisk->ino);
+ ce->ce_mode = ntohl(ondisk->mode);
+ ce->ce_uid = ntohl(ondisk->uid);
+ ce->ce_gid = ntohl(ondisk->gid);
+ ce->ce_size = ntohl(ondisk->size);
+ ce->ce_flags = flags;
+
+ hashcpy(ce->sha1, ondisk->sha1);
+
+ memcpy(ce->name, name, len);
+ ce->name[len] = '\0';
+ return ce;
}
/* remember to discard_cache() before reading a different cache! */
@@ -1288,7 +1278,7 @@ int read_index_from(struct index_state *istate, const char *path)
{
int fd, i;
struct stat st;
- unsigned long src_offset, dst_offset;
+ unsigned long src_offset;
struct cache_header *hdr;
void *mmap;
size_t mmap_size;
@@ -1327,29 +1317,18 @@ int read_index_from(struct index_state *istate, const char *path)
istate->cache_nr = ntohl(hdr->hdr_entries);
istate->cache_alloc = alloc_nr(istate->cache_nr);
istate->cache = xcalloc(istate->cache_alloc, sizeof(struct cache_entry *));
-
- /*
- * The disk format is actually larger than the in-memory format,
- * due to space for nsec etc, so even though the in-memory one
- * has room for a few more flags, we can allocate using the same
- * index size
- */
- istate->alloc = xmalloc(estimate_cache_size(mmap_size, istate->cache_nr));
istate->initialized = 1;
src_offset = sizeof(*hdr);
- dst_offset = 0;
for (i = 0; i < istate->cache_nr; i++) {
struct ondisk_cache_entry *disk_ce;
struct cache_entry *ce;
disk_ce = (struct ondisk_cache_entry *)((char *)mmap + src_offset);
- ce = (struct cache_entry *)((char *)istate->alloc + dst_offset);
- convert_from_disk(disk_ce, ce);
+ ce = create_from_disk(disk_ce);
set_index_entry(istate, i, ce);
src_offset += ondisk_ce_size(ce);
- dst_offset += ce_size(ce);
}
istate->timestamp.sec = st.st_mtime;
istate->timestamp.nsec = ST_MTIME_NSEC(st);
@@ -1383,11 +1362,15 @@ unmap:
int is_index_unborn(struct index_state *istate)
{
- return (!istate->cache_nr && !istate->alloc && !istate->timestamp.sec);
+ return (!istate->cache_nr && !istate->timestamp.sec);
}
int discard_index(struct index_state *istate)
{
+ int i;
+
+ for (i = 0; i < istate->cache_nr; i++)
+ free(istate->cache[i]);
resolve_undo_clear_index(istate);
istate->cache_nr = 0;
istate->cache_changed = 0;
@@ -1396,8 +1379,6 @@ int discard_index(struct index_state *istate)
istate->name_hash_initialized = 0;
free_hash(&istate->name_hash);
cache_tree_free(&(istate->cache_tree));
- free(istate->alloc);
- istate->alloc = NULL;
istate->initialized = 0;
/* no need to throw away allocated active_cache */