Hi,
When I ran perf record & report in the root directory, I noticed that
perf couldn't find any binaries. Both addresses and the actual names of
the binaries were printed as raw hex values:
# Overhead Command Shared Object Symbol
# ........ ............... ............. ......
#
14.23% modprobe b777ce85 [.] 0x000000b777ce85
|
|--9.52%-- 0x804cad2
| 0x8049b32
Strace showed that perf report was trying to open ".sbin/modprobe". I
found a one-line fix, which should at least explain my problem:
---------------------------------------------
>From a2eb15237fee2276fc8e388f9e15409ed7caf9e1 Mon Sep 17 00:00:00 2001
From: Alan Jenkins <[email protected]>
Date: Fri, 30 Oct 2009 14:12:30 +0000
Subject: [PATCH] perf tools: fix test for whether pathnames can be shortened
The intention is to consider the pair (filename, cwd) and shorten the
filename if it lives under cwd. E.g. ("/src/foo", "/src") -> "./foo".
Make the test more specific to exclude these unintended consequences:
("/src/foo", "/") -> ".src/foo"
("/src/foo", "/s") -> ".rc/foo"
Signed-off-by: Alan Jenkins <[email protected]>
---
tools/perf/util/map.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index 804e023..bd17703 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -31,7 +31,7 @@ static int strcommon(const char *pathname, char *cwd, int cwdlen)
if (cwd) {
int n = strcommon(filename, cwd, cwdlen);
- if (n == cwdlen) {
+ if (n == cwdlen && filename[n] == '/') {
snprintf(newfilename, sizeof(newfilename),
".%s", filename + n);
filename = newfilename;
--
1.6.3.2