[PATCH] perf tools: fix test for whether pathnames can be shortened

[Alan Jenkins]

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 <alan-jenkins@xxxxxxxxxxxxxx>
---
 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



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