65 lines · c
1// SPDX-License-Identifier: GPL-2.02#include <test_progs.h>3 4void test_stacktrace_map_raw_tp(void)5{6 const char *prog_name = "oncpu";7 int control_map_fd, stackid_hmap_fd, stackmap_fd;8 const char *file = "./test_stacktrace_map.bpf.o";9 __u32 key, val, duration = 0;10 int err, prog_fd;11 struct bpf_program *prog;12 struct bpf_object *obj;13 struct bpf_link *link = NULL;14 15 err = bpf_prog_test_load(file, BPF_PROG_TYPE_RAW_TRACEPOINT, &obj, &prog_fd);16 if (CHECK(err, "prog_load raw tp", "err %d errno %d\n", err, errno))17 return;18 19 prog = bpf_object__find_program_by_name(obj, prog_name);20 if (CHECK(!prog, "find_prog", "prog '%s' not found\n", prog_name))21 goto close_prog;22 23 link = bpf_program__attach_raw_tracepoint(prog, "sched_switch");24 if (!ASSERT_OK_PTR(link, "attach_raw_tp"))25 goto close_prog;26 27 /* find map fds */28 control_map_fd = bpf_find_map(__func__, obj, "control_map");29 if (CHECK_FAIL(control_map_fd < 0))30 goto close_prog;31 32 stackid_hmap_fd = bpf_find_map(__func__, obj, "stackid_hmap");33 if (CHECK_FAIL(stackid_hmap_fd < 0))34 goto close_prog;35 36 stackmap_fd = bpf_find_map(__func__, obj, "stackmap");37 if (CHECK_FAIL(stackmap_fd < 0))38 goto close_prog;39 40 /* give some time for bpf program run */41 sleep(1);42 43 /* disable stack trace collection */44 key = 0;45 val = 1;46 bpf_map_update_elem(control_map_fd, &key, &val, 0);47 48 /* for every element in stackid_hmap, we can find a corresponding one49 * in stackmap, and vise versa.50 */51 err = compare_map_keys(stackid_hmap_fd, stackmap_fd);52 if (CHECK(err, "compare_map_keys stackid_hmap vs. stackmap",53 "err %d errno %d\n", err, errno))54 goto close_prog;55 56 err = compare_map_keys(stackmap_fd, stackid_hmap_fd);57 if (CHECK(err, "compare_map_keys stackmap vs. stackid_hmap",58 "err %d errno %d\n", err, errno))59 goto close_prog;60 61close_prog:62 bpf_link__destroy(link);63 bpf_object__close(obj);64}65