1 files changed, 16 insertions, 3 deletions

diff --git a/tools/testing/selftests/bpf/test_stacktrace_map.c b/tools/testing/selftests/bpf/test_stacktrace_map.c
index 76d85c5d08bd..af111af7ca1a 100644
--- a/tools/testing/selftests/bpf/test_stacktrace_map.c
+++ b/tools/testing/selftests/bpf/test_stacktrace_map.c
@@ -19,14 +19,21 @@ struct bpf_map_def SEC("maps") stackid_hmap = {
         .type = BPF_MAP_TYPE_HASH,
         .key_size = sizeof(__u32),
         .value_size = sizeof(__u32),
-        .max_entries = 10000,
+        .max_entries = 16384,
 };
 
 struct bpf_map_def SEC("maps") stackmap = {
         .type = BPF_MAP_TYPE_STACK_TRACE,
         .key_size = sizeof(__u32),
         .value_size = sizeof(__u64) * PERF_MAX_STACK_DEPTH,
-        .max_entries = 10000,
+        .max_entries = 16384,
+};
+
+struct bpf_map_def SEC("maps") stack_amap = {
+        .type = BPF_MAP_TYPE_ARRAY,
+        .key_size = sizeof(__u32),
+        .value_size = sizeof(__u64) * PERF_MAX_STACK_DEPTH,
+        .max_entries = 16384,
 };
 
 /* taken from /sys/kernel/debug/tracing/events/sched/sched_switch/format */
@@ -44,7 +51,9 @@ struct sched_switch_args {
 SEC("tracepoint/sched/sched_switch")
 int oncpu(struct sched_switch_args *ctx)
 {
+        __u32 max_len = PERF_MAX_STACK_DEPTH * sizeof(__u64);
         __u32 key = 0, val = 0, *value_p;
+        void *stack_p;
 
         value_p = bpf_map_lookup_elem(&control_map, &key);
         if (value_p && *value_p)
@@ -52,8 +61,12 @@ int oncpu(struct sched_switch_args *ctx)
 
         /* The size of stackmap and stackid_hmap should be the same */
         key = bpf_get_stackid(ctx, &stackmap, 0);
-        if ((int)key >= 0)
+        if ((int)key >= 0) {
                 bpf_map_update_elem(&stackid_hmap, &key, &val, 0);
+                stack_p = bpf_map_lookup_elem(&stack_amap, &key);
+                if (stack_p)
+                        bpf_get_stack(ctx, stack_p, max_len, 0);
+        }
 
         return 0;
 }