perf probe: Fix kretprobe issue caused by GCC bug

[linux-2.6-microblaze.git] / tools / perf / util / probe-event.c

diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 8eae2af..a59d326 100644 (file)
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -894,6 +894,16 @@ static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
        struct debuginfo *dinfo;
        int ntevs, ret = 0;
 
+       /* Workaround for gcc #98776 issue.
+        * Perf failed to add kretprobe event with debuginfo of vmlinux which is
+        * compiled by gcc with -fpatchable-function-entry option enabled. The
+        * same issue with kernel module. The retprobe doesn`t need debuginfo.
+        * This workaround solution use map to query the probe function address
+        * for retprobe event.
+        */
+       if (pev->point.retprobe)
+               return 0;
+
        dinfo = open_debuginfo(pev->target, pev->nsi, !need_dwarf);
        if (!dinfo) {
                if (need_dwarf)