perf evsel: Enable type checking for perf_evsel_config_term types
authorAndi Kleen <ak@linux.intel.com>
Fri, 20 Oct 2017 20:27:54 +0000 (13:27 -0700)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Thu, 16 Nov 2017 17:49:51 +0000 (14:49 -0300)
Use a typed enum for the perf_evsel_config_term type enum.  This allows
gcc to do much stronger type checks, and also check for missing case
statements.

I removed the unused _MAX member from the number.

It found one missing case. I'm not sure it's a real problem, so I just
turned it into a BUG_ON for now.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20171020202755.21410-1-andi@firstfloor.org
[ Renamed the enum name to term_type as per jolsa's request ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/perf/util/evsel.c
tools/perf/util/evsel.h

index bfde6a7a80f28108e0e2036811944e62f2afcb85..4376cdfaea499847516852bcc3940846d168f687 100644 (file)
@@ -779,6 +779,8 @@ static void apply_config_terms(struct perf_evsel *evsel,
                case PERF_EVSEL__CONFIG_TERM_OVERWRITE:
                        attr->write_backward = term->val.overwrite ? 1 : 0;
                        break;
+               case PERF_EVSEL__CONFIG_TERM_DRV_CFG:
+                       BUG_ON(1);
                default:
                        break;
                }
index 157f49e8a772d7d7a1bcc53a22d41f02e3397e78..0688880227e18ade0a7999192781845bcbfd4e76 100644 (file)
@@ -38,7 +38,7 @@ struct cgroup_sel;
  * It is allocated within event parsing and attached to
  * perf_evsel::config_terms list head.
 */
-enum {
+enum term_type {
        PERF_EVSEL__CONFIG_TERM_PERIOD,
        PERF_EVSEL__CONFIG_TERM_FREQ,
        PERF_EVSEL__CONFIG_TERM_TIME,
@@ -49,12 +49,11 @@ enum {
        PERF_EVSEL__CONFIG_TERM_OVERWRITE,
        PERF_EVSEL__CONFIG_TERM_DRV_CFG,
        PERF_EVSEL__CONFIG_TERM_BRANCH,
-       PERF_EVSEL__CONFIG_TERM_MAX,
 };
 
 struct perf_evsel_config_term {
        struct list_head        list;
-       int     type;
+       enum term_type  type;
        union {
                u64     period;
                u64     freq;