bpf/prog_tests/stacktrace_map_skip.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 #include <test_progs.h>
0003 #include "stacktrace_map_skip.skel.h"
0004
0005 #define TEST_STACK_DEPTH  2
0006
0007 void test_stacktrace_map_skip(void)
0008 {
0009     struct stacktrace_map_skip *skel;
0010     int stackid_hmap_fd, stackmap_fd, stack_amap_fd;
0011     int err, stack_trace_len;
0012
0013     skel = stacktrace_map_skip__open_and_load();
0014     if (!ASSERT_OK_PTR(skel, "skel_open_and_load"))
0015         return;
0016
0017     /* find map fds */
0018     stackid_hmap_fd = bpf_map__fd(skel->maps.stackid_hmap);
0019     if (!ASSERT_GE(stackid_hmap_fd, 0, "stackid_hmap fd"))
0020         goto out;
0021
0022     stackmap_fd = bpf_map__fd(skel->maps.stackmap);
0023     if (!ASSERT_GE(stackmap_fd, 0, "stackmap fd"))
0024         goto out;
0025
0026     stack_amap_fd = bpf_map__fd(skel->maps.stack_amap);
0027     if (!ASSERT_GE(stack_amap_fd, 0, "stack_amap fd"))
0028         goto out;
0029
0030     skel->bss->pid = getpid();
0031
0032     err = stacktrace_map_skip__attach(skel);
0033     if (!ASSERT_OK(err, "skel_attach"))
0034         goto out;
0035
0036     /* give some time for bpf program run */
0037     sleep(1);
0038
0039     /* disable stack trace collection */
0040     skel->bss->control = 1;
0041
0042     /* for every element in stackid_hmap, we can find a corresponding one
0043      * in stackmap, and vise versa.
0044      */
0045     err = compare_map_keys(stackid_hmap_fd, stackmap_fd);
0046     if (!ASSERT_OK(err, "compare_map_keys stackid_hmap vs. stackmap"))
0047         goto out;
0048
0049     err = compare_map_keys(stackmap_fd, stackid_hmap_fd);
0050     if (!ASSERT_OK(err, "compare_map_keys stackmap vs. stackid_hmap"))
0051         goto out;
0052
0053     stack_trace_len = TEST_STACK_DEPTH * sizeof(__u64);
0054     err = compare_stack_ips(stackmap_fd, stack_amap_fd, stack_trace_len);
0055     if (!ASSERT_OK(err, "compare_stack_ips stackmap vs. stack_amap"))
0056         goto out;
0057
0058     if (!ASSERT_EQ(skel->bss->failed, 0, "skip_failed"))
0059         goto out;
0060
0061 out:
0062     stacktrace_map_skip__destroy(skel);
0063 }