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[1/3] perf tools: Recognize hugetlb mapping as anon mapping

Message ID 1472824787-107939-2-git-send-email-wangnan0@huawei.com
State Superseded
Headers show

Commit Message

Wang Nan Sept. 2, 2016, 1:59 p.m. UTC 
Hugetlbfs mapping should be recognized as anon mapping so user has
a chance to create /tmp/perf-<pid>.map file for symbol resolving. This
patch utilizes MAP_HUGETLB to identify hugetlb mapping.

After this patch, if perf is started before the program uses huge pages
starting, perf is able to recognize hugetlb mapping as anon mapping.

Signed-off-by: Wang Nan <wangnan0@huawei.com>

Signed-off-by: Hou Pengyang <houpengyang@huawei.com>

Cc: He Kuang <hekuang@huawei.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/map.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

-- 
1.8.3.4
diff mbox

Patch

diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index 728129a..a42010d 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -6,6 +6,7 @@ 
 #include <string.h>
 #include <stdio.h>
 #include <unistd.h>
+#include <sys/mman.h>
 #include "map.h"
 #include "thread.h"
 #include "strlist.h"
@@ -24,9 +25,10 @@  const char *map_type__name[MAP__NR_TYPES] = {
 	[MAP__VARIABLE] = "Variables",
 };
 
-static inline int is_anon_memory(const char *filename)
+static inline int is_anon_memory(const char *filename, u32 flags)
 {
-	return !strcmp(filename, "//anon") ||
+	return flags & MAP_HUGETLB ||
+	       !strcmp(filename, "//anon") ||
 	       !strncmp(filename, "/dev/zero", sizeof("/dev/zero") - 1) ||
 	       !strncmp(filename, "/anon_hugepage", sizeof("/anon_hugepage") - 1);
 }
@@ -155,7 +157,7 @@  struct map *map__new(struct machine *machine, u64 start, u64 len,
 		int anon, no_dso, vdso, android;
 
 		android = is_android_lib(filename);
-		anon = is_anon_memory(filename);
+		anon = is_anon_memory(filename, flags);
 		vdso = is_vdso_map(filename);
 		no_dso = is_no_dso_memory(filename);