From: Jiri Olsa <jolsa@redhat.com>
To: Namhyung Kim <namhyung@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Mark Rutland <mark.rutland@arm.com>,
Stephane Eranian <eranian@google.com>,
LKML <linux-kernel@vger.kernel.org>,
linux-perf-users@vger.kernel.org
Subject: Re: [PATCH 6/9] perf record: Support synthesizing cgroup events
Date: Wed, 8 Jan 2020 23:18:33 +0100 [thread overview]
Message-ID: <20200108221833.GD12995@krava> (raw)
In-Reply-To: <20200107133501.327117-7-namhyung@kernel.org>
On Tue, Jan 07, 2020 at 10:34:58PM +0900, Namhyung Kim wrote:
SNIP
> + if (perf_tool__process_synth_event(tool, event, machine, process) < 0) {
> + pr_debug("process synth event failed\n");
> + return -1;
> + }
> +
> + return 0;
> +}
> +
> +static int perf_event__walk_cgroup_tree(struct perf_tool *tool,
> + union perf_event *event,
> + char *path, size_t mount_len,
> + perf_event__handler_t process,
> + struct machine *machine)
> +{
> + size_t pos = strlen(path);
> + DIR *d;
> + struct dirent *dent;
> + int ret = 0;
> +
> + if (perf_event__synthesize_cgroup(tool, event, path, mount_len,
> + process, machine) < 0)
> + return -1;
> +
> + d = opendir(path);
> + if (d == NULL) {
> + pr_debug("failed to open directory: %s\n", path);
> + return -1;
> + }
> +
> + while ((dent = readdir(d)) != NULL) {
> + if (dent->d_type != DT_DIR)
> + continue;
> + if (!strcmp(dent->d_name, ".") ||
> + !strcmp(dent->d_name, ".."))
> + continue;
> +
> + if (path[pos - 1] != '/')
> + strcat(path, "/");
> + strcat(path, dent->d_name);
shouldn't you also check for the max size of path in here?
jirka
next prev parent reply other threads:[~2020-01-08 22:18 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-07 13:34 [PATCHSET 0/9] perf: Improve cgroup profiling (v4) Namhyung Kim
2020-01-07 13:34 ` [PATCH 1/9] perf/core: Add PERF_RECORD_CGROUP event Namhyung Kim
2020-01-07 13:34 ` [PATCH 2/9] perf/core: Add PERF_SAMPLE_CGROUP feature Namhyung Kim
2020-01-07 13:34 ` [PATCH 3/9] perf tools: Basic support for CGROUP event Namhyung Kim
2020-01-07 13:34 ` [PATCH 4/9] perf tools: Maintain cgroup hierarchy Namhyung Kim
2020-01-08 21:52 ` Jiri Olsa
2020-01-09 0:51 ` Namhyung Kim
2020-01-20 13:57 ` Namhyung Kim
2020-01-21 9:42 ` Jiri Olsa
2020-02-17 15:46 ` Arnaldo Carvalho de Melo
2020-02-17 19:22 ` Namhyung Kim
2020-01-08 22:01 ` Jiri Olsa
2020-01-09 0:55 ` Namhyung Kim
2020-01-07 13:34 ` [PATCH 5/9] perf report: Add 'cgroup' sort key Namhyung Kim
2020-01-07 13:34 ` [PATCH 6/9] perf record: Support synthesizing cgroup events Namhyung Kim
2020-01-08 22:08 ` Jiri Olsa
2020-01-09 5:19 ` Namhyung Kim
2020-01-08 22:18 ` Jiri Olsa [this message]
2020-01-09 7:50 ` Namhyung Kim
2020-01-08 22:21 ` Jiri Olsa
2020-01-09 7:51 ` Namhyung Kim
2020-01-07 13:34 ` [PATCH 7/9] perf record: Add --all-cgroups option Namhyung Kim
2020-01-07 13:35 ` [PATCH 8/9] perf top: " Namhyung Kim
2020-01-08 22:24 ` Jiri Olsa
2020-01-09 7:55 ` Namhyung Kim
2020-01-09 8:18 ` Jiri Olsa
2020-01-07 13:35 ` [PATCH 9/9] perf script: Add --show-cgroup-events option Namhyung Kim
-- strict thread matches above, loose matches on Subject: below --
2020-03-25 12:45 [PATCHSET 0/9] perf: Improve cgroup profiling (v6) Namhyung Kim
2020-03-25 12:45 ` [PATCH 6/9] perf record: Support synthesizing cgroup events Namhyung Kim
2020-03-30 16:30 ` Arnaldo Carvalho de Melo
2020-03-30 16:43 ` Arnaldo Carvalho de Melo
2020-03-31 16:04 ` Arnaldo Carvalho de Melo
2020-04-01 23:22 ` Namhyung Kim
2019-12-23 6:07 [PATCHSET 0/9] perf: Improve cgroup profiling (v3) Namhyung Kim
2019-12-23 6:07 ` [PATCH 6/9] perf record: Support synthesizing cgroup events Namhyung Kim
2019-12-20 4:32 [PATCHSET 0/9] perf: Improve cgroup profiling (v2) Namhyung Kim
2019-12-20 4:32 ` [PATCH 6/9] perf record: Support synthesizing cgroup events Namhyung Kim
2019-08-28 7:31 [PATCHSET 0/9] perf: Improve cgroup profiling (v1) Namhyung Kim
2019-08-28 7:31 ` [PATCH 6/9] perf record: Support synthesizing cgroup events Namhyung Kim
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