lkml.org 
[lkml]   [2009]   [Dec]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] perf tools: replace %m with %a in sscanf
Liming Wang wrote:
> Not all glibc support %m and it results in a compile error if
> %m not supported. Replace it with %a and (float *) casts.
>
> Signed-off-by: Liming Wang<liming.wang@windriver.com>
> Acked-by: Frederic Weisbecker<fweisbec@gmail.com>
> ---
> tools/perf/util/probe-event.c | 6 +++---
> 1 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
> index e42f3ac..cd7fbda 100644
> --- a/tools/perf/util/probe-event.c
> +++ b/tools/perf/util/probe-event.c
> @@ -199,8 +199,8 @@ void parse_trace_kprobe_event(const char *str, char **group, char **event,
> semantic_error("Too less arguments.");
>
> /* Scan event and group name. */
> - ret = sscanf(argv[0], "%c:%m[^/ \t]/%m[^ \t]",
> - &pr, group, event);
> + ret = sscanf(argv[0], "%c:%a[^/ \t]/%a[^ \t]",
> + &pr, (float *)(void *)group, (float *)(void *)event);

Hmm, the code itself is OK for me, but I think we need a comment
why we cast (void *) to (float *)...

Thank you,

> if (ret != 3)
> semantic_error("Failed to parse event name: %s", argv[0]);
> pr_debug("Group:%s Event:%s probe:%c\n", *group, *event, pr);
> @@ -211,7 +211,7 @@ void parse_trace_kprobe_event(const char *str, char **group, char **event,
> pp->retprobe = (pr == 'r');
>
> /* Scan function name and offset */
> - ret = sscanf(argv[1], "%m[^+]+%d",&pp->function,&pp->offset);
> + ret = sscanf(argv[1], "%a[^+]+%d", (float *)(void *)&pp->function,&pp->offset);
> if (ret == 1)
> pp->offset = 0;
>

--
Masami Hiramatsu

Software Engineer
Hitachi Computer Products (America), Inc.
Software Solutions Division

e-mail: mhiramat@redhat.com



\
 
 \ /
  Last update: 2009-12-02 17:49    [W:0.065 / U:0.628 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site