Re: [PATCH v2 3/3] Use g_new() & friends where that makes obvious sense

[Pavel Dovgalyuk <pavel.dovgalyuk@xxxxxxxxx>]

On 15.03.2022 17:41, Markus Armbruster wrote:
> g_new(T, n) is neater than g_malloc(sizeof(T) * n).  It's also safer,
> for two reasons.  One, it catches multiplication overflowing size_t.
> Two, it returns T * rather than void *, which lets the compiler catch
> more type errors.
>
> This commit only touches allocations with size arguments of the form
> sizeof(T).
>
> Patch created mechanically with:
>
>      $ spatch --in-place --sp-file scripts/coccinelle/use-g_new-etc.cocci \
>              --macro-file scripts/cocci-macro-file.h FILES...
>
> Signed-off-by: Markus Armbruster <armbru@xxxxxxxxxx>
> Reviewed-by: Philippe Mathieu-Daudé <f4bug@xxxxxxxxx>
> Reviewed-by: Cédric Le Goater <clg@xxxxxxxx>
> Reviewed-by: Alex Bennée <alex.bennee@xxxxxxxxxx>
> Acked-by: Dr. David Alan Gilbert <dgilbert@xxxxxxxxxx>
> ---
>   replay/replay-char.c                     |  4 +--
>   replay/replay-events.c                   | 10 +++---
Reviewed-by: Pavel Dovgalyuk <Pavel.Dovgalyuk@xxxxxxxxx>

> diff --git a/replay/replay-char.c b/replay/replay-char.c
> index dc0002367e..d2025948cf 100644
> --- a/replay/replay-char.c
> +++ b/replay/replay-char.c
> @@ -50,7 +50,7 @@ void replay_register_char_driver(Chardev *chr)
>   
>   void replay_chr_be_write(Chardev *s, uint8_t *buf, int len)
>   {
> -    CharEvent *event = g_malloc0(sizeof(CharEvent));
> +    CharEvent *event = g_new0(CharEvent, 1);
>   
>       event->id = find_char_driver(s);
>       if (event->id < 0) {
> @@ -85,7 +85,7 @@ void replay_event_char_read_save(void *opaque)
>   
>   void *replay_event_char_read_load(void)
>   {
> -    CharEvent *event = g_malloc0(sizeof(CharEvent));
> +    CharEvent *event = g_new0(CharEvent, 1);
>   
>       event->id = replay_get_byte();
>       replay_get_array_alloc(&event->buf, &event->len);
> diff --git a/replay/replay-events.c b/replay/replay-events.c
> index 15983dd250..ac47c89834 100644
> --- a/replay/replay-events.c
> +++ b/replay/replay-events.c
> @@ -119,7 +119,7 @@ void replay_add_event(ReplayAsyncEventKind event_kind,
>           return;
>       }
>   
> -    Event *event = g_malloc0(sizeof(Event));
> +    Event *event = g_new0(Event, 1);
>       event->event_kind = event_kind;
>       event->opaque = opaque;
>       event->opaque2 = opaque2;
> @@ -243,17 +243,17 @@ static Event *replay_read_event(int checkpoint)
>           }
>           break;
>       case REPLAY_ASYNC_EVENT_INPUT:
> -        event = g_malloc0(sizeof(Event));
> +        event = g_new0(Event, 1);
>           event->event_kind = replay_state.read_event_kind;
>           event->opaque = replay_read_input_event();
>           return event;
>       case REPLAY_ASYNC_EVENT_INPUT_SYNC:
> -        event = g_malloc0(sizeof(Event));
> +        event = g_new0(Event, 1);
>           event->event_kind = replay_state.read_event_kind;
>           event->opaque = 0;
>           return event;
>       case REPLAY_ASYNC_EVENT_CHAR_READ:
> -        event = g_malloc0(sizeof(Event));
> +        event = g_new0(Event, 1);
>           event->event_kind = replay_state.read_event_kind;
>           event->opaque = replay_event_char_read_load();
>           return event;
> @@ -263,7 +263,7 @@ static Event *replay_read_event(int checkpoint)
>           }
>           break;
>       case REPLAY_ASYNC_EVENT_NET:
> -        event = g_malloc0(sizeof(Event));
> +        event = g_new0(Event, 1);
>           event->event_kind = replay_state.read_event_kind;
>           event->opaque = replay_event_net_load();
>           return event;