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Protect sha1_entry_pos call with mutex

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There is an occasional assertion failure in sha1_entry_pos from
pack_entry_find_index when running threaded.  Holding the mutex
around the code that grabs the index_map data and processes it
makes this assertion failure go away.
This commit is contained in:
Russell Belfer 2013-05-02 03:34:56 -07:00
parent 81b7dec4ee
commit 8c535f3f68
1 changed files with 12 additions and 10 deletions
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22
src/pack.c
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@ -1050,24 +1050,24 @@ static int pack_entry_find_offset(
const git_oid *short_oid,
size_t len)
{
const uint32_t *level1_ofs = p->index_map.data;
const unsigned char *index = p->index_map.data;
const uint32_t *level1_ofs;
const unsigned char *index;
unsigned hi, lo, stride;
int pos, found = 0;
const unsigned char *current = 0;
*offset_out = 0;
if (index == NULL) {
int error;
if (!p->index_map.data && pack_index_open(p) < 0)
return git_odb__error_notfound("failed to open packfile", NULL);
if ((error = pack_index_open(p)) < 0)
return error;
assert(p->index_map.data);
if (git_mutex_lock(&p->lock) < 0)
return packfile_error("failed to get lock for finding entry offset");
index = p->index_map.data;
level1_ofs = p->index_map.data;
}
assert(p->index_map.data);
index = p->index_map.data;
level1_ofs = p->index_map.data;
if (p->index_version > 1) {
level1_ofs += 2;
@ -1093,6 +1093,8 @@ static int pack_entry_find_offset(
/* Use git.git lookup code */
pos = sha1_entry_pos(index, stride, 0, lo, hi, p->num_objects, short_oid->id);
git_mutex_unlock(&p->lock);
if (pos >= 0) {
/* An object matching exactly the oid was found */
found = 1;