diff options
| -rw-r--r-- | tools/perf/builtin-report.c | 56 |
1 files changed, 30 insertions, 26 deletions
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c index bf8dd2e893e4..f2ff8609e98e 100644 --- a/tools/perf/builtin-report.c +++ b/tools/perf/builtin-report.c @@ -412,14 +412,41 @@ static int perf_evlist__tty_browse_hists(struct perf_evlist *evlist, return 0; } +static void report__warn_kptr_restrict(const struct report *rep) +{ + struct map *kernel_map = rep->session->machines.host.vmlinux_maps[MAP__FUNCTION]; + struct kmap *kernel_kmap = map__kmap(kernel_map); + + if (kernel_map == NULL || + (kernel_map->dso->hit && + (kernel_kmap->ref_reloc_sym == NULL || + kernel_kmap->ref_reloc_sym->addr == 0))) { + const char *desc = + "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 (!RB_EMPTY_ROOT(&kdso->symbols[MAP__FUNCTION])) { + desc = "If some relocation was applied (e.g. " + "kexec) symbols may be misresolved."; + } + } + + ui__warning( +"Kernel address maps (/proc/{kallsyms,modules}) were restricted.\n\n" +"Check /proc/sys/kernel/kptr_restrict before running 'perf record'.\n\n%s\n\n" +"Samples in kernel modules can't be resolved as well.\n\n", + desc); + } +} + static int __cmd_report(struct report *rep) { int ret = -EINVAL; u64 nr_samples; struct perf_session *session = rep->session; struct perf_evsel *pos; - struct map *kernel_map; - struct kmap *kernel_kmap; const char *help = "For a higher level overview, try: perf report --sort comm,dso"; struct ui_progress prog; struct perf_data_file *file = session->file; @@ -444,30 +471,7 @@ static int __cmd_report(struct report *rep) if (ret) return ret; - kernel_map = session->machines.host.vmlinux_maps[MAP__FUNCTION]; - kernel_kmap = map__kmap(kernel_map); - if (kernel_map == NULL || - (kernel_map->dso->hit && - (kernel_kmap->ref_reloc_sym == NULL || - kernel_kmap->ref_reloc_sym->addr == 0))) { - const char *desc = - "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 (!RB_EMPTY_ROOT(&kdso->symbols[MAP__FUNCTION])) { - desc = "If some relocation was applied (e.g. " - "kexec) symbols may be misresolved."; - } - } - - ui__warning( -"Kernel address maps (/proc/{kallsyms,modules}) were restricted.\n\n" -"Check /proc/sys/kernel/kptr_restrict before running 'perf record'.\n\n%s\n\n" -"Samples in kernel modules can't be resolved as well.\n\n", - desc); - } + report__warn_kptr_restrict(rep); if (use_browser == 0) { if (verbose > 3) |