Commit-ID: 814d7a4d2c33657489f7b45bc0b2dcaa0d88edc0
Gitweb: http://git.kernel.org/tip/814d7a4d2c33657489f7b45bc0b2dcaa0d88edc0
Author: Arnaldo Carvalho de Melo <[email protected]>
AuthorDate: Wed, 24 Oct 2012 18:44:13 -0200
Committer: Arnaldo Carvalho de Melo <[email protected]>
CommitDate: Wed, 24 Oct 2012 18:44:13 -0200
perf trace: Print the name of a syscall when failing to read its info
When failing to read the tracepoint event format, like currently with
sys_execve, that is not defined via SYSCALL_DEFINE macros and thus
doesn't have an entry in:
$ ls -d /sys/kernel/debug/tracing/events/syscalls/sys_enter_*exec*
/sys/kernel/debug/tracing/events/syscalls/sys_enter_kexec_load
$
Cc: David Ahern <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Thomas Gleixner <[email protected]>
echo Link: http://lkml.kernel.org/n/tip-`ranpwd -l 24`@git.kernel.org
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
---
tools/perf/builtin-trace.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index fb83cfe..ba05510 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -278,7 +278,10 @@ static struct syscall *trace__syscall_info(struct trace *trace,
return &trace->syscalls.table[id];
out_cant_read:
- printf("Problems reading syscall %d information\n", id);
+ printf("Problems reading syscall %d", id);
+ if (id <= trace->syscalls.max && trace->syscalls.table[id].name != NULL)
+ printf("(%s)", trace->syscalls.table[id].name);
+ puts(" information");
return NULL;
}