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| author | Masami Hiramatsu <mhiramat@kernel.org> | 2017-12-08 19:26:46 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-12 13:32:12 +0300 |
| commit | d606bac136ec4c25a31830269a18aea66bd6cf0c (patch) | |
| tree | 8946eb560cff8a40e2b2e61e11def79299d07d3c /tools/perf | |
| parent | 3efc86f667fcf0f35c55cf6ca2461cbd5c94f2c7 (diff) | |
| download | linux-d606bac136ec4c25a31830269a18aea66bd6cf0c.tar.xz | |
perf probe: Add warning message if there is unexpected event name
[ Upstream commit 9f5c6d8777a2d962b0eeacb2a16f37da6bea545b ]
This improve the error message so that user can know event-name error
before writing new events to kprobe-events interface.
E.g.
======
#./perf probe -x /lib64/libc-2.25.so malloc_get_state*
Internal error: "malloc_get_state@GLIBC_2" is an invalid event name.
Error: Failed to add events.
======
Reported-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Acked-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Reviewed-by: Thomas Richter <tmricht@linux.vnet.ibm.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: bhargavb <bhargavaramudu@gmail.com>
Cc: linux-rt-users@vger.kernel.org
Link: http://lkml.kernel.org/r/151275040665.24652.5188568529237584489.stgit@devbox
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/util/probe-event.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index c3cd3488fee7..68786bb7790e 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -2625,6 +2625,14 @@ static int get_new_event_name(char *buf, size_t len, const char *base, out: free(nbase); + + /* Final validation */ + if (ret >= 0 && !is_c_func_name(buf)) { + pr_warning("Internal error: \"%s\" is an invalid event name.\n", + buf); + ret = -EINVAL; + } + return ret; } |