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perf symbols: Allow loading kallsyms without considering kcore files

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Before the support for using /proc/kcore was introduced, the kallsyms
routines used /proc/modules and the first 'perf test' entry expected
finding maps for each module in the system, which is not the case with
the kcore code. Provide a way to ignore kcore files so that the test can
have its expectations met.

Improving the test to cover kcore files as well needs to be done.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-ek5urnu103dlhfk4l6pcw041@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo
2016-04-19 12:12:49 -03:00
parent 2cc4666927
commit e02092b9a9
4 changed files with 22 additions and 6 deletions
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12
tools/perf/util/symbol.c
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@@ -1208,8 +1208,8 @@ static int kallsyms__delta(struct map *map, const char *filename, u64 *delta)
return 0;
}
int dso__load_kallsyms(struct dso *dso, const char *filename,
struct map *map, symbol_filter_t filter)
int __dso__load_kallsyms(struct dso *dso, const char *filename,
struct map *map, bool no_kcore, symbol_filter_t filter)
{
u64 delta = 0;
@@ -1230,12 +1230,18 @@ int dso__load_kallsyms(struct dso *dso, const char *filename,
else
dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS;
if (!dso__load_kcore(dso, map, filename))
if (!no_kcore && !dso__load_kcore(dso, map, filename))
return dso__split_kallsyms_for_kcore(dso, map, filter);
else
return dso__split_kallsyms(dso, map, delta, filter);
}
int dso__load_kallsyms(struct dso *dso, const char *filename,
struct map *map, symbol_filter_t filter)
{
return __dso__load_kallsyms(dso, filename, map, false, filter);
}
static int dso__load_perf_map(struct dso *dso, struct map *map,
symbol_filter_t filter)
{