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authorArnaldo Carvalho de Melo <acme@redhat.com>2012-10-24 22:44:13 +0200
committerArnaldo Carvalho de Melo <acme@redhat.com>2012-10-24 22:44:13 +0200
commit814d7a4d2c33657489f7b45bc0b2dcaa0d88edc0 (patch)
tree2ccaea4e18d2f3fdb407faf77ff6d0d45f2c068c /tools/perf/builtin-trace.c
parentperf tools: Pretty print errno for some more functions (diff)
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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 <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> echo Link: http://lkml.kernel.org/n/tip-`ranpwd -l 24`@git.kernel.org Link: http://lkml.kernel.org/n/tip-q3ak0j8b81yxylykq5wp2uwi@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-trace.c')
-rw-r--r--tools/perf/builtin-trace.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index fb83cfe472e3..ba055103b525 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;
}