perf symbols: Remove open coded management of long_name_allocated member

Instead of expecting callers to set this member accodingly so that later
at dso destruction it can, if needed, be correctly free()d, make it a
requirement by passing it as a parameter to dso__set_long_name.

Cc: Adrian Hunter <[e-mail]>
Cc: David Ahern <[e-mail]>
Cc: Frederic Weisbecker <[e-mail]>
Cc: Jiri Olsa <[e-mail]>
Cc: Mike Galbraith <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Cc: Paul Mackerras <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: Stephane Eranian <[e-mail]>
Link: http://lkml.kernel.org/n/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/perf/util/dso.c

···
 	return dso;
 }
 
-void dso__set_long_name(struct dso *dso, char *name)
+void dso__set_long_name(struct dso *dso, char *name, bool name_allocated)
 {
 	if (name == NULL)
 		return;
-	dso->long_name = name;
-	dso->long_name_len = strlen(name);
+
+	if (dso->long_name_allocated)
+		free(dso->long_name);
+
+	dso->long_name		 = name;
+	dso->long_name_len	 = strlen(name);
+	dso->long_name_allocated = name_allocated;
 }
 
 void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated)
···
 	if (dso != NULL) {
 		int i;
 		strcpy(dso->name, name);
-		dso__set_long_name(dso, dso->name);
+		dso__set_long_name(dso, dso->name, false);
 		dso__set_short_name(dso, dso->name, false);
 		for (i = 0; i < MAP__NR_TYPES; ++i)
 			dso->symbols[i] = dso->symbol_names[i] = RB_ROOT;

tools/perf/util/dso.h

···
 void dso__delete(struct dso *dso);
 
 void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated);
-void dso__set_long_name(struct dso *dso, char *name);
+void dso__set_long_name(struct dso *dso, char *name, bool name_allocated);
 
 int dso__name_len(const struct dso *dso);
 

tools/perf/util/machine.c

···
 				ret = -1;
 				goto out;
 			}
-			dso__set_long_name(map->dso, long_name);
-			map->dso->long_name_allocated = 1;
+			dso__set_long_name(map->dso, long_name, true);
 			dso__kernel_module_get_build_id(map->dso, "");
 		}
 	}

tools/perf/util/symbol.c

···
 		dso->data_type = DSO_BINARY_TYPE__GUEST_KCORE;
 	else
 		dso->data_type = DSO_BINARY_TYPE__KCORE;
-	dso__set_long_name(dso, strdup(kcore_filename));
+	dso__set_long_name(dso, strdup(kcore_filename), true);
 
 	close(fd);
 
···
 			dso->data_type = DSO_BINARY_TYPE__GUEST_VMLINUX;
 		else
 			dso->data_type = DSO_BINARY_TYPE__VMLINUX;
-		dso__set_long_name(dso, (char *)vmlinux);
-		dso->long_name_allocated = vmlinux_allocated;
+		dso__set_long_name(dso, (char *)vmlinux, vmlinux_allocated);
 		dso__set_loaded(dso, map->type);
 		pr_debug("Using %s for symbols\n", symfs_vmlinux);
 	}
···
 	free(kallsyms_allocated_filename);
 
 	if (err > 0 && !dso__is_kcore(dso)) {
-		dso__set_long_name(dso, strdup("[kernel.kallsyms]"));
+		dso__set_long_name(dso, strdup("[kernel.kallsyms]"), true);
 		map__fixup_start(map);
 		map__fixup_end(map);
 	}
···
 		pr_debug("Using %s for symbols\n", kallsyms_filename);
 	if (err > 0 && !dso__is_kcore(dso)) {
 		machine__mmap_name(machine, path, sizeof(path));
-		dso__set_long_name(dso, strdup(path));
+		dso__set_long_name(dso, strdup(path), true);
 		map__fixup_start(map);
 		map__fixup_end(map);
 	}

tools/perf/util/vdso.c

···
 		dso = dso__new(VDSO__MAP_NAME);
 		if (dso != NULL) {
 			dsos__add(head, dso);
-			dso__set_long_name(dso, file);
+			dso__set_long_name(dso, file, false);
 		}
 	}