perf tools: Add ->sort() member to struct sort_entry

Currently, what the sort_entry does is just identifying hist entries
so that they can be grouped properly.  However, with -F option
support, it indeed needs to sort entries appropriately to be shown to
users.  So add ->sort() member to do it.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>

tools/perf/util/sort.c

diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index 39f8f36..b55ff6d 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -95,6 +95,12 @@
 	return comm__str(right->comm) - comm__str(left->comm);
 }
 
+static int64_t
+sort__comm_sort(struct hist_entry *left, struct hist_entry *right)
+{
+	return strcmp(comm__str(right->comm), comm__str(left->comm));
+}
+
 static int hist_entry__comm_snprintf(struct hist_entry *he, char *bf,
 				     size_t size, unsigned int width)
 {
@@ -105,6 +111,7 @@
 	.se_header	= "Command",
 	.se_cmp		= sort__comm_cmp,
 	.se_collapse	= sort__comm_collapse,
+	.se_sort	= sort__comm_sort,
 	.se_snprintf	= hist_entry__comm_snprintf,
 	.se_width_idx	= HISTC_COMM,
 };
@@ -134,7 +141,7 @@
 static int64_t
 sort__dso_cmp(struct hist_entry *left, struct hist_entry *right)
 {
-	return _sort__dso_cmp(left->ms.map, right->ms.map);
+	return _sort__dso_cmp(right->ms.map, left->ms.map);
 }
 
 static int _hist_entry__dso_snprintf(struct map *map, char *bf,
@@ -206,6 +213,15 @@
 	return _sort__sym_cmp(left->ms.sym, right->ms.sym);
 }
 
+static int64_t
+sort__sym_sort(struct hist_entry *left, struct hist_entry *right)
+{
+	if (!left->ms.sym || !right->ms.sym)
+		return cmp_null(left->ms.sym, right->ms.sym);
+
+	return strcmp(right->ms.sym->name, left->ms.sym->name);
+}
+
 static int _hist_entry__sym_snprintf(struct map *map, struct symbol *sym,
 				     u64 ip, char level, char *bf, size_t size,
 				     unsigned int width)
@@ -252,6 +268,7 @@
 struct sort_entry sort_sym = {
 	.se_header	= "Symbol",
 	.se_cmp		= sort__sym_cmp,
+	.se_sort	= sort__sym_sort,
 	.se_snprintf	= hist_entry__sym_snprintf,
 	.se_width_idx	= HISTC_SYMBOL,
 };
@@ -279,7 +296,7 @@
 					    map__rip_2objdump(map, right->ip));
 		}
 	}
-	return strcmp(left->srcline, right->srcline);
+	return strcmp(right->srcline, left->srcline);
 }
 
 static int hist_entry__srcline_snprintf(struct hist_entry *he, char *bf,
@@ -307,7 +324,7 @@
 	if (!sym_l || !sym_r)
 		return cmp_null(sym_l, sym_r);
 
-	return strcmp(sym_l->name, sym_r->name);
+	return strcmp(sym_r->name, sym_l->name);
 }
 
 static int hist_entry__parent_snprintf(struct hist_entry *he, char *bf,

tools/perf/util/sort.h

diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index ba65741..1d8d8037 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -180,6 +180,7 @@
 
 	int64_t (*se_cmp)(struct hist_entry *, struct hist_entry *);
 	int64_t (*se_collapse)(struct hist_entry *, struct hist_entry *);
+	int64_t	(*se_sort)(struct hist_entry *, struct hist_entry *);
 	int	(*se_snprintf)(struct hist_entry *he, char *bf, size_t size,
 			       unsigned int width);
 	u8	se_width_idx;