--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2022 Bytedance
+
+#include <test_progs.h>
+
+#include "test_map_lookup_percpu_elem.skel.h"
+
+#define TEST_VALUE 1
+
+void test_map_lookup_percpu_elem(void)
+{
+ struct test_map_lookup_percpu_elem *skel;
+ int key = 0, ret;
+ int nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
+ int *buf;
+
+ buf = (int *)malloc(nr_cpus*sizeof(int));
+ if (!ASSERT_OK_PTR(buf, "malloc"))
+ return;
+ memset(buf, 0, nr_cpus*sizeof(int));
+ buf[0] = TEST_VALUE;
+
+ skel = test_map_lookup_percpu_elem__open_and_load();
+ if (!ASSERT_OK_PTR(skel, "test_map_lookup_percpu_elem__open_and_load"))
+ return;
+ ret = test_map_lookup_percpu_elem__attach(skel);
+ ASSERT_OK(ret, "test_map_lookup_percpu_elem__attach");
+
+ ret = bpf_map_update_elem(bpf_map__fd(skel->maps.percpu_array_map), &key, buf, 0);
+ ASSERT_OK(ret, "percpu_array_map update");
+
+ ret = bpf_map_update_elem(bpf_map__fd(skel->maps.percpu_hash_map), &key, buf, 0);
+ ASSERT_OK(ret, "percpu_hash_map update");
+
+ ret = bpf_map_update_elem(bpf_map__fd(skel->maps.percpu_lru_hash_map), &key, buf, 0);
+ ASSERT_OK(ret, "percpu_lru_hash_map update");
+
+ syscall(__NR_getuid);
+
+ ret = skel->bss->percpu_array_elem_val == TEST_VALUE &&
+ skel->bss->percpu_hash_elem_val == TEST_VALUE &&
+ skel->bss->percpu_lru_hash_elem_val == TEST_VALUE;
+ ASSERT_OK(!ret, "bpf_map_lookup_percpu_elem success");
+
+ test_map_lookup_percpu_elem__destroy(skel);
+}
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2022 Bytedance
+
+#include "vmlinux.h"
+#include <bpf/bpf_helpers.h>
+
+int percpu_array_elem_val = 0;
+int percpu_hash_elem_val = 0;
+int percpu_lru_hash_elem_val = 0;
+
+struct {
+ __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);
+ __uint(max_entries, 1);
+ __type(key, __u32);
+ __type(value, __u32);
+} percpu_array_map SEC(".maps");
+
+struct {
+ __uint(type, BPF_MAP_TYPE_PERCPU_HASH);
+ __uint(max_entries, 1);
+ __type(key, __u32);
+ __type(value, __u32);
+} percpu_hash_map SEC(".maps");
+
+struct {
+ __uint(type, BPF_MAP_TYPE_LRU_PERCPU_HASH);
+ __uint(max_entries, 1);
+ __type(key, __u32);
+ __type(value, __u32);
+} percpu_lru_hash_map SEC(".maps");
+
+SEC("tp/syscalls/sys_enter_getuid")
+int sysenter_getuid(const void *ctx)
+{
+ __u32 key = 0;
+ __u32 cpu = 0;
+ __u32 *value;
+
+ value = bpf_map_lookup_percpu_elem(&percpu_array_map, &key, cpu);
+ if (value)
+ percpu_array_elem_val = *value;
+
+ value = bpf_map_lookup_percpu_elem(&percpu_hash_map, &key, cpu);
+ if (value)
+ percpu_hash_elem_val = *value;
+
+ value = bpf_map_lookup_percpu_elem(&percpu_lru_hash_map, &key, cpu);
+ if (value)
+ percpu_lru_hash_elem_val = *value;
+
+ return 0;
+}
+
+char _license[] SEC("license") = "GPL";