1 // SPDX-License-Identifier: GPL-2.0
2 #include <test_progs.h>
4 static void test_task_fd_query_tp_core(const char *probe_name,
7 const char *file = "./test_tracepoint.o";
8 int err, bytes, efd, prog_fd, pmu_fd;
9 struct perf_event_attr attr = {};
10 __u64 probe_offset, probe_addr;
11 __u32 len, prog_id, fd_type;
12 struct bpf_object *obj;
16 err = bpf_prog_load(file, BPF_PROG_TYPE_TRACEPOINT, &obj, &prog_fd);
17 if (CHECK(err, "bpf_prog_load", "err %d errno %d\n", err, errno))
20 snprintf(buf, sizeof(buf),
21 "/sys/kernel/debug/tracing/events/%s/id", probe_name);
22 efd = open(buf, O_RDONLY, 0);
23 if (CHECK(efd < 0, "open", "err %d errno %d\n", efd, errno))
25 bytes = read(efd, buf, sizeof(buf));
27 if (CHECK(bytes <= 0 || bytes >= sizeof(buf), "read",
28 "bytes %d errno %d\n", bytes, errno))
31 attr.config = strtol(buf, NULL, 0);
32 attr.type = PERF_TYPE_TRACEPOINT;
33 attr.sample_type = PERF_SAMPLE_RAW;
34 attr.sample_period = 1;
35 attr.wakeup_events = 1;
36 pmu_fd = syscall(__NR_perf_event_open, &attr, -1 /* pid */,
37 0 /* cpu 0 */, -1 /* group id */,
39 if (CHECK(err, "perf_event_open", "err %d errno %d\n", err, errno))
42 err = ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0);
43 if (CHECK(err, "perf_event_ioc_enable", "err %d errno %d\n", err,
47 err = ioctl(pmu_fd, PERF_EVENT_IOC_SET_BPF, prog_fd);
48 if (CHECK(err, "perf_event_ioc_set_bpf", "err %d errno %d\n", err,
52 /* query (getpid(), pmu_fd) */
54 err = bpf_task_fd_query(getpid(), pmu_fd, 0, buf, &len, &prog_id,
55 &fd_type, &probe_offset, &probe_addr);
56 if (CHECK(err < 0, "bpf_task_fd_query", "err %d errno %d\n", err,
60 err = (fd_type == BPF_FD_TYPE_TRACEPOINT) && !strcmp(buf, tp_name);
61 if (CHECK(!err, "check_results", "fd_type %d tp_name %s\n",
66 goto close_prog_noerr;
73 bpf_object__close(obj);
76 void test_task_fd_query_tp(void)
78 test_task_fd_query_tp_core("sched/sched_switch",
80 test_task_fd_query_tp_core("syscalls/sys_enter_read",