perf top: Support call-graph display options also

Currently 'perf top --call-graph' option is same as 'perf record'.  But
'perf top' also need to receive display options in 'perf report'.  To do
that, change parse_callchain_report_opt() to allow record options too.

Now perf top can receive display options like below:

  $ perf top --call-graph
    Error: option `call-graph' requires a value

   Usage: perf top [<options>]

        --call-graph
          <mode[,dump_size],output_type,min_percent[,print_limit],call_order[,branch]>
                     setup and enables call-graph (stack chain/backtrace)
                     recording: fp dwarf lbr, output_type (graph, flat,
		     fractal, or none), min percent threshold, optional
		     print limit, callchain order, key (function or
		     address), add branches

  $ perf top --call-graph callee,graph,fp

Signed-off-by: Namhyung Kim <namhyung@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: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1445495330-25416-2-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/callchain.c

@@ -77,12 +77,14 @@ static int parse_callchain_sort_key(const char *value)
 	return -1;
 }
 
-int
-parse_callchain_report_opt(const char *arg)
+static int
+__parse_callchain_report_opt(const char *arg, bool allow_record_opt)
 {
 	char *tok;
 	char *endptr;
 	bool minpcnt_set = false;
+	bool record_opt_set = false;
+	bool try_stack_size = false;
 
 	symbol_conf.use_callchain = true;
 
@@ -100,6 +102,28 @@ parse_callchain_report_opt(const char *arg)
 		    !parse_callchain_order(tok) ||
 		    !parse_callchain_sort_key(tok)) {
 			/* parsing ok - move on to the next */
+			try_stack_size = false;
+			goto next;
+		} else if (allow_record_opt && !record_opt_set) {
+			if (parse_callchain_record(tok, &callchain_param))
+				goto try_numbers;
+
+			/* assume that number followed by 'dwarf' is stack size */
+			if (callchain_param.record_mode == CALLCHAIN_DWARF)
+				try_stack_size = true;
+
+			record_opt_set = true;
+			goto next;
+		}
+
+try_numbers:
+		if (try_stack_size) {
+			unsigned long size = 0;
+
+			if (get_stack_size(tok, &size) < 0)
+				return -1;
+			callchain_param.dump_size = size;
+			try_stack_size = false;
 		} else if (!minpcnt_set) {
 			/* try to get the min percent */
 			callchain_param.min_percent = strtod(tok, &endptr);
@@ -112,7 +136,7 @@ parse_callchain_report_opt(const char *arg)
 			if (tok == endptr)
 				return -1;
 		}
-
+next:
 		arg = NULL;
 	}
 
@@ -123,6 +147,16 @@ parse_callchain_report_opt(const char *arg)
 	return 0;
 }
 
+int parse_callchain_report_opt(const char *arg)
+{
+	return __parse_callchain_report_opt(arg, false);
+}
+
+int parse_callchain_top_opt(const char *arg)
+{
+	return __parse_callchain_report_opt(arg, true);
+}
+
 int perf_callchain_config(const char *var, const char *value)
 {
 	char *endptr;