From: <zhe.he@windriver.com>
To: <peterz@infradead.org>, <mingo@redhat.com>, <acme@kernel.org>,
<mark.rutland@arm.com>, <alexander.shishkin@linux.intel.com>,
<jolsa@redhat.com>, <namhyung@kernel.org>, <mhiramat@kernel.org>,
<kstewart@linuxfoundation.org>, <tglx@linutronix.de>,
<linux-kernel@vger.kernel.org>, <zhe.he@windriver.com>
Subject: [PATCH 2/2] perf: probe-file: Check return value of strlist__add
Date: Tue, 25 Feb 2020 22:41:43 +0800 [thread overview]
Message-ID: <1582641703-233485-2-git-send-email-zhe.he@windriver.com> (raw)
In-Reply-To: <1582641703-233485-1-git-send-email-zhe.he@windriver.com>
From: He Zhe <zhe.he@windriver.com>
strlist__add may fail with -ENOMEM or -EEXIST. Check it and give debugging
hint when necessary.
Signed-off-by: He Zhe <zhe.he@windriver.com>
---
tools/perf/builtin-probe.c | 30 ++++++++++++++++--------------
tools/perf/util/probe-file.c | 26 +++++++++++++++++++++-----
2 files changed, 37 insertions(+), 19 deletions(-)
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index 26bc5923e6b5..8b4511c70fed 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -442,24 +442,26 @@ static int perf_del_probe_events(struct strfilter *filter)
}
ret = probe_file__get_events(kfd, filter, klist);
- if (ret == 0) {
- strlist__for_each_entry(ent, klist)
- pr_info("Removed event: %s\n", ent->s);
+ if (ret < 0)
+ goto out;
- ret = probe_file__del_strlist(kfd, klist);
- if (ret < 0)
- goto error;
- }
+ strlist__for_each_entry(ent, klist)
+ pr_info("Removed event: %s\n", ent->s);
+
+ ret = probe_file__del_strlist(kfd, klist);
+ if (ret < 0)
+ goto error;
ret2 = probe_file__get_events(ufd, filter, ulist);
- if (ret2 == 0) {
- strlist__for_each_entry(ent, ulist)
- pr_info("Removed event: %s\n", ent->s);
+ if (ret2 < 0)
+ goto out;
- ret2 = probe_file__del_strlist(ufd, ulist);
- if (ret2 < 0)
- goto error;
- }
+ strlist__for_each_entry(ent, ulist)
+ pr_info("Removed event: %s\n", ent->s);
+
+ ret2 = probe_file__del_strlist(ufd, ulist);
+ if (ret2 < 0)
+ goto error;
if (ret == -ENOENT && ret2 == -ENOENT)
pr_warning("\"%s\" does not hit any event.\n", str);
diff --git a/tools/perf/util/probe-file.c b/tools/perf/util/probe-file.c
index cf44c05f89c1..00f086cba88f 100644
--- a/tools/perf/util/probe-file.c
+++ b/tools/perf/util/probe-file.c
@@ -307,10 +307,14 @@ int probe_file__get_events(int fd, struct strfilter *filter,
p = strchr(ent->s, ':');
if ((p && strfilter__compare(filter, p + 1)) ||
strfilter__compare(filter, ent->s)) {
- strlist__add(plist, ent->s);
- ret = 0;
+ ret = strlist__add(plist, ent->s);
+ if (ret < 0) {
+ pr_debug("strlist__add failed (%d)\n", ret);
+ goto out;
+ }
}
}
+out:
strlist__delete(namelist);
return ret;
@@ -517,7 +521,11 @@ static int probe_cache__load(struct probe_cache *pcache)
ret = -EINVAL;
goto out;
}
- strlist__add(entry->tevlist, buf);
+ ret = strlist__add(entry->tevlist, buf);
+ if (ret < 0) {
+ pr_debug("strlist__add failed (%d)\n", ret);
+ goto out;
+ }
}
}
out:
@@ -678,7 +686,12 @@ int probe_cache__add_entry(struct probe_cache *pcache,
command = synthesize_probe_trace_command(&tevs[i]);
if (!command)
goto out_err;
- strlist__add(entry->tevlist, command);
+ ret = strlist__add(entry->tevlist, command);
+ if (ret < 0) {
+ pr_debug("strlist__add failed (%d)\n", ret);
+ goto out_err;
+ }
+
free(command);
}
list_add_tail(&entry->node, &pcache->entries);
@@ -859,7 +872,10 @@ int probe_cache__scan_sdt(struct probe_cache *pcache, const char *pathname)
break;
}
- strlist__add(entry->tevlist, buf);
+ ret = strlist__add(entry->tevlist, buf);
+ if (ret < 0)
+ pr_debug("strlist__add failed (%d)\n", ret);
+
free(buf);
entry = NULL;
}
--
2.24.1
next prev parent reply other threads:[~2020-02-25 14:44 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-25 14:41 [PATCH 1/2] perf: Fix checking of duplicate probe to give proper hint zhe.he
2020-02-25 14:41 ` zhe.he [this message]
2020-02-25 22:49 ` [PATCH 2/2] perf: probe-file: Check return value of strlist__add Masami Hiramatsu
2020-02-26 2:49 ` He Zhe
2020-02-26 7:11 ` Masami Hiramatsu
2020-02-25 22:34 ` [PATCH 1/2] perf: Fix checking of duplicate probe to give proper hint Masami Hiramatsu
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