[PATCH 2/8] perf sort: Add 'addr' sort key

[Namhyung Kim <namhyung@kernel.org>]

From: Namhyung Kim <namhyung.kim@lge.com>

New addr sort key provides a way to sort the entries by the symbol
addresses.  It can be helpful to figure out symbol resolution problem
when a dso cannot do it properly as well as finding hotpath in a dso
and/or a function.

Suggested-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Buglink: https://bugzilla.kernel.org/show_bug.cgi?id=55561
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/perf/util/hist.c |  2 ++
 tools/perf/util/hist.h |  1 +
 tools/perf/util/sort.c | 29 +++++++++++++++++++++++++++++
 tools/perf/util/sort.h |  1 +
 4 files changed, 33 insertions(+)

diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 72b4eec820c3..c098d6ebab1f 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -52,6 +52,8 @@ void hists__reset_col_len(struct hists *hists)
 
 	for (col = 0; col < HISTC_NR_COLS; ++col)
 		hists__set_col_len(hists, col, 0);
+
+	hists__set_col_len(hists, HISTC_ADDR, BITS_PER_LONG / 4 + 2);
 }
 
 static void hists__set_unres_dso_col_len(struct hists *hists, int dso)
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index 6be88dc12b9a..9599f805828f 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -44,6 +44,7 @@ enum hist_column {
 	HISTC_PARENT,
 	HISTC_CPU,
 	HISTC_SRCLINE,
+	HISTC_ADDR,
 	HISTC_MISPREDICT,
 	HISTC_SYMBOL_FROM,
 	HISTC_SYMBOL_TO,
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index 701ab1d84894..1543ab124052 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -343,6 +343,34 @@ struct sort_entry sort_cpu = {
 	.se_width_idx	= HISTC_CPU,
 };
 
+/* --sort addr */
+
+static int64_t
+sort__addr_cmp(struct hist_entry *left, struct hist_entry *right)
+{
+	return right->ip - left->ip;
+}
+
+static int hist_entry__addr_snprintf(struct hist_entry *self, char *bf,
+				     size_t size, unsigned int width)
+{
+	struct map *map = self->ms.map;
+	u64 addr = self->ip;
+
+	if (map)
+		addr = map->unmap_ip(map, self->ip);
+
+	return repsep_snprintf(bf, size, "%#*llx", width, addr);
+}
+
+struct sort_entry sort_addr = {
+	.se_header      = "Address",
+	.se_cmp	        = sort__addr_cmp,
+	.se_snprintf    = hist_entry__addr_snprintf,
+	.se_width_idx	= HISTC_ADDR,
+};
+
+
 /* sort keys for branch stacks */
 
 static int64_t
@@ -872,6 +900,7 @@ static struct sort_dimension common_sort_dimensions[] = {
 	DIM(SORT_PARENT, "parent", sort_parent),
 	DIM(SORT_CPU, "cpu", sort_cpu),
 	DIM(SORT_SRCLINE, "srcline", sort_srcline),
+	DIM(SORT_ADDR, "addr", sort_addr),
 };
 
 #undef DIM
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index 51f1b5a854e7..57a6fc1a1f7f 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -138,6 +138,7 @@ enum sort_type {
 	SORT_PARENT,
 	SORT_CPU,
 	SORT_SRCLINE,
+	SORT_ADDR,
 
 	/* branch stack specific sort keys */
 	__SORT_BRANCH_STACK,
-- 
1.7.11.7