On Tue, Jul 02, 2013 at 01:27:25PM -0600, David Ahern wrote:
> List heads are currently allocated way down the function chain in __add_event
> and add_tracepoint and then freed when the scanner code calls
> parse_events_update_lists.
>
> Be more explicit with where memory is allocated and who should free it. With
> this patch the list_head is allocated in the scanner code and freed when the
> scanner code calls parse_events_update_lists.
>
SNIP
> @@ -266,9 +279,10 @@ event_legacy_mem:
> PE_PREFIX_MEM PE_VALUE ':' PE_MODIFIER_BP sep_dc
> {
> struct parse_events_evlist *data = _data;
> - struct list_head *list = NULL;
> + struct list_head *list;
>
> - ABORT_ON(parse_events_add_breakpoint(&list, &data->idx,
> + ALLOC_LIST(list);
> + ABORT_ON(parse_events_add_breakpoint(list, &data->idx,
> (void *) $2, $4));
> $$ = list;
> }
> @@ -276,9 +290,10 @@ PE_PREFIX_MEM PE_VALUE ':' PE_MODIFIER_BP sep_dc
> PE_PREFIX_MEM PE_VALUE sep_dc
> {
> struct parse_events_evlist *data = _data;
> - struct list_head *list = NULL;
> + struct list_head *list;
>
> - ABORT_ON(parse_events_add_breakpoint(&list, &data->idx,
> + ALLOC_LIST(list);
> + ABORT_ON(parse_events_add_breakpoint(list, &data->idx,
> (void *) $2, NULL));
so who now frees the list if there's an error
in parse_events_add_breakpoint?
ditto for other ABORT_ON cases
jirka
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