perf evsel: Introduce fprintf_callchain() method out of fprintf_sym()

In 'perf trace' we're just interested in printing callchains, and we
don't want to use the symbol_conf.use_callchain, so move the callchain
part to a new method.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Milian Wolff <milian.wolff@kdab.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-kcn3romzivcpxb3u75s9nz33@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-trace.c

@@ -2203,7 +2203,7 @@ static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
 			       event->header.type);
 			goto out_put;
 		}
-		perf_evsel__fprintf_sym(evsel, sample, &al, 38, print_opts,
+		perf_evsel__fprintf_callchain(evsel, sample, &al, 38, print_opts,
 					      scripting_max_stack, trace->output);
 	}
 out:

tools/perf/util/evsel.h

@@ -381,6 +381,12 @@ struct perf_attr_details {
 int perf_evsel__fprintf(struct perf_evsel *evsel,
 			struct perf_attr_details *details, FILE *fp);
 
+int perf_evsel__fprintf_callchain(struct perf_evsel *evsel,
+				  struct perf_sample *sample,
+				  struct addr_location *al, int left_alignment,
+				  unsigned int print_opts,
+				  unsigned int stack_depth, FILE *fp);
+
 bool perf_evsel__fallback(struct perf_evsel *evsel, int err,
 			  char *msg, size_t msgsize);
 int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target,

tools/perf/util/session.c

@@ -1953,7 +1953,7 @@ struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
 	return NULL;
 }
 
-int perf_evsel__fprintf_sym(struct perf_evsel *evsel, struct perf_sample *sample,
+int perf_evsel__fprintf_callchain(struct perf_evsel *evsel, struct perf_sample *sample,
 				  struct addr_location *al, int left_alignment,
 				  unsigned int print_opts, unsigned int stack_depth,
 				  FILE *fp)
@@ -1968,7 +1968,7 @@ int perf_evsel__fprintf_sym(struct perf_evsel *evsel, struct perf_sample *sample
 	int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE;
 	char s = print_oneline ? ' ' : '\t';
 
-	if (symbol_conf.use_callchain && sample->callchain) {
+	if (sample->callchain) {
 		struct addr_location node_al;
 
 		if (thread__resolve_callchain(al->thread, evsel,
@@ -2027,7 +2027,26 @@ int perf_evsel__fprintf_sym(struct perf_evsel *evsel, struct perf_sample *sample
 next:
 			callchain_cursor_advance(&callchain_cursor);
 		}
+	}
+
+	return printed;
+}
 
+int perf_evsel__fprintf_sym(struct perf_evsel *evsel, struct perf_sample *sample,
+			    struct addr_location *al, int left_alignment,
+			    unsigned int print_opts, unsigned int stack_depth,
+			    FILE *fp)
+{
+	int printed = 0;
+	int print_ip = print_opts & PRINT_IP_OPT_IP;
+	int print_sym = print_opts & PRINT_IP_OPT_SYM;
+	int print_dso = print_opts & PRINT_IP_OPT_DSO;
+	int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
+	int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE;
+
+	if (symbol_conf.use_callchain && sample->callchain) {
+		printed += perf_evsel__fprintf_callchain(evsel, sample, al, left_alignment,
+							 print_opts, stack_depth, fp);
 	} else if (!(al->sym && al->sym->ignore)) {
 		printed += fprintf(fp, "%-*.*s", left_alignment, left_alignment, " ");