[PATCH 06/13] perf tools: Correctly identify anon_hugepage when generating map (v2)

[Arnaldo Carvalho de Melo]

From: Yannick Brosseau <scientist@xxxxxx>

When parsing /proc/xxx/maps, the sscanf in perf_event__synthesize_mmap_events
truncate the map name at the space in "/anon_hugepage (deleted)".

is_anon_memory() then only receives the string "/anon_hugepage" and does
not detect it.  We change is_anon_memory() to only compare the first
part of the string, effectively ignoring if " (deleted)" is there.

Signed-off-by: Yannick Brosseau <scientist@xxxxxx>
Tested-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Joshua Zhu <zhu.wen-jie@xxxxxx>
Cc: kernel-team@xxxxxx
Link: http://lkml.kernel.org/r/1448538152-2898-1-git-send-email-scientist@xxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/util/map.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index afc6b56cf749..93d9f1ce3baa 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -26,8 +26,8 @@ const char *map_type__name[MAP__NR_TYPES] = {
 static inline int is_anon_memory(const char *filename)
 {
 	return !strcmp(filename, "//anon") ||
-	       !strcmp(filename, "/dev/zero (deleted)") ||
-	       !strcmp(filename, "/anon_hugepage (deleted)");
+	       !strncmp(filename, "/dev/zero", sizeof("/dev/zero") - 1) ||
+	       !strncmp(filename, "/anon_hugepage", sizeof("/anon_hugepage") - 1);
 }
 
 static inline int is_no_dso_memory(const char *filename)
-- 
2.1.0

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