perf probe: Fix short file name probe location reporting

[mirror_ubuntu-jammy-kernel.git] / tools / perf / util / probe-event.c

diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 4bde988a0b04dfeb5fd6f395c4bf6dd2167f907c..d3af30d62880946d148df029e1eedf3e071fd4b5 100644 (file)
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -1068,13 +1068,13 @@ static char *synthesize_perf_probe_point(struct perf_probe_point *pp)
                        goto error;
        }
        if (pp->file) {
-               len = strlen(pp->file) - 31;
-               if (len < 0)
-                       len = 0;
-               tmp = strchr(pp->file + len, '/');
-               if (!tmp)
-                       tmp = pp->file + len;
-               ret = e_snprintf(file, 32, "@%s", tmp + 1);
+               tmp = pp->file;
+               len = strlen(tmp);
+               if (len > 30) {
+                       tmp = strchr(pp->file + len - 30, '/');
+                       tmp = tmp ? tmp + 1 : pp->file + len - 30;
+               }
+               ret = e_snprintf(file, 32, "@%s", tmp);
                if (ret <= 0)
                        goto error;
        }