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perf map: Introduce map__has_symbols()

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To further simplify checking if symbols are available for a given map
and to reduce the number of users of MAP__{FUNCTION,VARIABLE}.

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: https://lkml.kernel.org/n/tip-iyfoyvbfdti5uehgpjum3qrq@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2018-04-23 17:13:49 -03:00
parent d88205db9c
commit e94b861a23
4 changed files with 12 additions and 9 deletions
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9
tools/perf/builtin-report.c
View file

@ -523,12 +523,9 @@ static void report__warn_kptr_restrict(const struct report *rep)
"As no suitable kallsyms nor vmlinux was found, kernel samples\n"
"can't be resolved.";
if (kernel_map) {
const struct dso *kdso = kernel_map->dso;
if (dso__has_symbols(kdso, MAP__FUNCTION)) {
desc = "If some relocation was applied (e.g. "
"kexec) symbols may be misresolved.";
}
if (kernel_map && map__has_symbols(kernel_map)) {
desc = "If some relocation was applied (e.g. "
"kexec) symbols may be misresolved.";
}
ui__warning(

5
tools/perf/builtin-top.c
View file

@ -742,7 +742,7 @@ static void perf_event__process_sample(struct perf_tool *tool,
"Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
"Check /proc/sys/kernel/kptr_restrict.\n\n"
"Kernel%s samples will not be resolved.\n",
al.map && dso__has_symbols(al.map->dso, MAP__FUNCTION) ?
al.map && map__has_symbols(al.map) ?
" modules" : "");
if (use_browser <= 0)
sleep(5);
@ -764,8 +764,7 @@ static void perf_event__process_sample(struct perf_tool *tool,
* invalid --vmlinux ;-)
*/
if (!machine->kptr_restrict_warned && !top->vmlinux_warned &&
__map__is_kernel(al.map) &&
dso__has_symbols(al.map->dso, MAP__FUNCTION)) {
__map__is_kernel(al.map) && map__has_symbols(al.map)) {
if (symbol_conf.vmlinux_name) {
char serr[256];
dso__strerror_load(al.map->dso, serr, sizeof(serr));

5
tools/perf/util/map.c
View file

@ -259,6 +259,11 @@ bool __map__is_kernel(const struct map *map)
return __machine__kernel_map(map->groups->machine, map->type) == map;
}
bool map__has_symbols(const struct map *map)
{
return dso__has_symbols(map->dso, map->type);
}
static void map__exit(struct map *map)
{
BUG_ON(!RB_EMPTY_NODE(&map->rb_node));

2
tools/perf/util/map.h
View file

@ -264,4 +264,6 @@ static inline bool __map__is_kmodule(const struct map *map)
return !__map__is_kernel(map);
}
bool map__has_symbols(const struct map *map);
#endif /* __PERF_MAP_H */