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perf parse-regs: Improve error output when faced with unknown register name
Add quotes around the register name and suggest using 'perf record -I?' to get the list of available registers. Before: # perf record -Idi,xmm20,xmm1 Warning: unknown register xmm20, check man page Usage: perf record [<options>] [<command>] or: perf record [<options>] -- <command> [<options>] -I, --intr-regs[=<any register>] sample selected machine registers on interrupt, use -I ? to list register names # # perf record -Idi,xmm20,xmm1 Warning: unknown register "xmm20", check man page or run "perf record -I?" Usage: perf record [<options>] [<command>] or: perf record [<options>] -- <command> [<options>] -I, --intr-regs[=<any register>] sample selected machine registers on interrupt, use -I ? to list register names # Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: https://lkml.kernel.org/n/tip-9a9hyuum8c0oggg86xd3sxc5@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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1 changed files with 1 additions and 2 deletions
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@ -48,8 +48,7 @@ parse_regs(const struct option *opt, const char *str, int unset)
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break;
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}
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if (!r->name) {
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ui__warning("unknown register %s,"
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" check man page\n", s);
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ui__warning("Unknown register \"%s\", check man page or run \"perf record -I?\"\n", s);
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goto error;
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}
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