On Fri, Sep 29, 2017 at 12:42 AM, Jeff King <peff@xxxxxxxx> wrote:
> On Thu, Sep 28, 2017 at 08:38:39AM +0000, Olga Telezhnaya wrote:
>
>> diff --git a/packfile.c b/packfile.c
>> index f69a5c8d607af..ae3b0b2e9c09a 100644
>> --- a/packfile.c
>> +++ b/packfile.c
>> @@ -876,6 +876,7 @@ void prepare_packed_git(void)
>> for (alt = alt_odb_list; alt; alt = alt->next)
>> prepare_packed_git_one(alt->path, 0);
>> rearrange_packed_git();
>> + INIT_LIST_HEAD(&packed_git_mru.list);
>> prepare_packed_git_mru();
>> prepare_packed_git_run_once = 1;
>> }
>
> I was thinking on this hunk a bit more, and I think it's not quite
> right.
>
> The prepare_packed_git_mru() function will clear the mru list and then
> re-add each item from the packed_git list. But by calling
> INIT_LIST_HEAD() here, we're effectively clearing the packed_git_mru
> list, and we end up leaking whatever was on the list before.
The current code is:
static int prepare_packed_git_run_once = 0;
void prepare_packed_git(void)
{
struct alternate_object_database *alt;
if (prepare_packed_git_run_once)
return;
prepare_packed_git_one(get_object_directory(), 1);
prepare_alt_odb();
for (alt = alt_odb_list; alt; alt = alt->next)
prepare_packed_git_one(alt->path, 0);
rearrange_packed_git();
prepare_packed_git_mru();
prepare_packed_git_run_once = 1;
}
As we use the "prepare_packed_git_run_once" static, this function will
only be called only once when packed_git_mru has not yet been
initialized, so there will be no leak.
