From: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
To: Adrian Hunter <adrian.hunter@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>,
linux-kernel@vger.kernel.org, David Ahern <dsahern@gmail.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Jiri Olsa <jolsa@redhat.com>, Mike Galbraith <efault@gmx.de>,
Namhyung Kim <namhyung@gmail.com>,
Paul Mackerras <paulus@samba.org>,
Stephane Eranian <eranian@google.com>
Subject: Re: [PATCH V7 5/7] perf buildid-cache: add ability to add kcore to the cache
Date: Mon, 14 Oct 2013 10:13:35 -0300 [thread overview]
Message-ID: <20131014131335.GA11175@ghostprotocols.net> (raw)
In-Reply-To: <1381747424-3557-6-git-send-email-adrian.hunter@intel.com>
Em Mon, Oct 14, 2013 at 01:43:42PM +0300, Adrian Hunter escreveu:
> +static int kcore_copy__compare_fds(int from, int to)
<SNIP>
> + while (1) {
> + /* Use read because mmap won't work on proc files */
> + ret = read(from, buf_from, page_size);
> + if (ret < 0)
> + return -1;
> + if (!ret)
> + return 0;
> + n = ret;
> + len = ret;
> + while (n) {
> + ret = read(to, buf_to, n);
> + if (ret <= 0)
> + return -1;
> + n -= ret;
You can't go on potentially rewriting 'buf_to' like that, consider using
readn().
> + }
> +
> + if (memcmp(buf_from, buf_to, len))
> + return -1;
> + }
> +}
next prev parent reply other threads:[~2013-10-14 13:13 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-14 10:43 [PATCH V7 0/7] perf tools: kcore improvements Adrian Hunter
2013-10-14 10:43 ` [PATCH V7 1/7] perf tools: Add map_groups__find_ams() Adrian Hunter
2013-10-15 5:33 ` [tip:perf/core] perf symbols: " tip-bot for Arnaldo Carvalho de Melo
2013-10-14 10:43 ` [PATCH V7 2/7] perf tools: fix annotate_browser__callq() Adrian Hunter
2013-10-15 5:35 ` [tip:perf/core] perf annotate: Fix annotate_browser__callq() tip-bot for Adrian Hunter
2013-10-14 10:43 ` [PATCH V7 3/7] perf tools: find kcore symbols on other maps Adrian Hunter
2013-10-15 5:34 ` [tip:perf/core] perf annotate: Find " tip-bot for Adrian Hunter
2013-10-14 10:43 ` [PATCH V7 4/7] perf tools: add copyfile_mode() Adrian Hunter
2013-10-15 5:35 ` [tip:perf/core] perf tools: Add copyfile_mode() tip-bot for Adrian Hunter
2013-10-14 10:43 ` [PATCH V7 5/7] perf buildid-cache: add ability to add kcore to the cache Adrian Hunter
2013-10-14 13:13 ` Arnaldo Carvalho de Melo [this message]
2013-10-14 13:57 ` Adrian Hunter
2013-10-15 5:35 ` [tip:perf/core] perf buildid-cache: Add " tip-bot for Adrian Hunter
2013-10-14 10:43 ` [PATCH V7 6/7] perf tools: add ability to find kcore in build-id cache Adrian Hunter
2013-10-15 5:35 ` [tip:perf/core] perf symbols: Add " tip-bot for Adrian Hunter
2013-10-14 10:43 ` [PATCH V7 7/7] perf tools: another fix for annotate_browser__callq() Adrian Hunter
2013-10-15 5:35 ` [tip:perf/core] perf annotate: Another " tip-bot for Adrian Hunter
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