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perf tools: Search for more options when passing args to -h
Recently 'perf <tool> -h' was made aware of arguments and would show just the help for the arguments specified, but that required a strict form, i.e.: $ perf -h --tui worked, but: $ perf -h tui didn't. Make it support both cases and also look at the option help when neither matches, so that he following examples works: $ perf report -h interface Usage: perf report [<options>] --gtk Use the GTK2 interface --stdio Use the stdio interface --tui Use the TUI interface $ perf report -h stack Usage: perf report [<options>] -g, --call-graph <print_type,threshold[,print_limit],order, sort_key[,branch]> Display call graph (stack chain/backtrace): print_type: call graph printing style (graph|flat|fractal|none) threshold: minimum call graph inclusion threshold (<percent>) print_limit: maximum number of call graph entry (<number>) order: call graph order (caller|callee) sort_key: call graph sort key (function|address) branch: include last branch info to call graph (branch) Default: graph,0.5,caller,function --max-stack <n> Set the maximum stack depth when parsing the callchain, anything beyond the specified depth will be ignored. Default: 127 $ Suggested-by: Ingo Molnar <mingo@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Chandler Carruth <chandlerc@gmail.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-xzqvamzqv3cv0p6w3inhols3@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -695,8 +695,21 @@ static bool option__in_argv(const struct option *opt, const struct parse_opt_ctx
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for (i = 1; i < ctx->argc; ++i) {
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const char *arg = ctx->argv[i];
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if (arg[0] != '-')
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if (arg[0] != '-') {
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if (arg[1] == '\0') {
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if (arg[0] == opt->short_name)
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return true;
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continue;
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}
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if (opt->long_name && strcmp(opt->long_name, arg) == 0)
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return true;
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if (opt->help && strcasestr(opt->help, arg) != NULL)
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return true;
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continue;
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}
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if (arg[1] == opt->short_name ||
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(arg[1] == '-' && opt->long_name && strcmp(opt->long_name, arg + 2) == 0))
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