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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 | // SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2019 Facebook */ #include <test_progs.h> #include <sys/mman.h> struct s { int a; long long b; } __attribute__((packed)); #include "test_skeleton.skel.h" void test_skeleton(void) { int duration = 0, err; struct test_skeleton* skel; struct test_skeleton__bss *bss; struct test_skeleton__data *data; struct test_skeleton__data_dyn *data_dyn; struct test_skeleton__rodata *rodata; struct test_skeleton__rodata_dyn *rodata_dyn; struct test_skeleton__kconfig *kcfg; const void *elf_bytes; size_t elf_bytes_sz = 0; void *m; int i, fd; skel = test_skeleton__open(); if (CHECK(!skel, "skel_open", "failed to open skeleton\n")) return; if (CHECK(skel->kconfig, "skel_kconfig", "kconfig is mmaped()!\n")) goto cleanup; bss = skel->bss; data = skel->data; data_dyn = skel->data_dyn; rodata = skel->rodata; rodata_dyn = skel->rodata_dyn; ASSERT_STREQ(bpf_map__name(skel->maps.rodata_dyn), ".rodata.dyn", "rodata_dyn_name"); ASSERT_STREQ(bpf_map__name(skel->maps.data_dyn), ".data.dyn", "data_dyn_name"); /* validate values are pre-initialized correctly */ CHECK(data->in1 != -1, "in1", "got %d != exp %d\n", data->in1, -1); CHECK(data->out1 != -1, "out1", "got %d != exp %d\n", data->out1, -1); CHECK(data->in2 != -1, "in2", "got %lld != exp %lld\n", data->in2, -1LL); CHECK(data->out2 != -1, "out2", "got %lld != exp %lld\n", data->out2, -1LL); CHECK(bss->in3 != 0, "in3", "got %d != exp %d\n", bss->in3, 0); CHECK(bss->out3 != 0, "out3", "got %d != exp %d\n", bss->out3, 0); CHECK(bss->in4 != 0, "in4", "got %lld != exp %lld\n", bss->in4, 0LL); CHECK(bss->out4 != 0, "out4", "got %lld != exp %lld\n", bss->out4, 0LL); CHECK(rodata->in.in6 != 0, "in6", "got %d != exp %d\n", rodata->in.in6, 0); CHECK(bss->out6 != 0, "out6", "got %d != exp %d\n", bss->out6, 0); ASSERT_EQ(rodata_dyn->in_dynarr_sz, 0, "in_dynarr_sz"); for (i = 0; i < 4; i++) ASSERT_EQ(rodata_dyn->in_dynarr[i], -(i + 1), "in_dynarr"); for (i = 0; i < 4; i++) ASSERT_EQ(data_dyn->out_dynarr[i], i + 1, "out_dynarr"); /* validate we can pre-setup global variables, even in .bss */ data->in1 = 10; data->in2 = 11; bss->in3 = 12; bss->in4 = 13; rodata->in.in6 = 14; rodata_dyn->in_dynarr_sz = 4; for (i = 0; i < 4; i++) rodata_dyn->in_dynarr[i] = i + 10; err = test_skeleton__load(skel); if (CHECK(err, "skel_load", "failed to load skeleton: %d\n", err)) goto cleanup; /* validate pre-setup values are still there */ CHECK(data->in1 != 10, "in1", "got %d != exp %d\n", data->in1, 10); CHECK(data->in2 != 11, "in2", "got %lld != exp %lld\n", data->in2, 11LL); CHECK(bss->in3 != 12, "in3", "got %d != exp %d\n", bss->in3, 12); CHECK(bss->in4 != 13, "in4", "got %lld != exp %lld\n", bss->in4, 13LL); CHECK(rodata->in.in6 != 14, "in6", "got %d != exp %d\n", rodata->in.in6, 14); ASSERT_EQ(rodata_dyn->in_dynarr_sz, 4, "in_dynarr_sz"); for (i = 0; i < 4; i++) ASSERT_EQ(rodata_dyn->in_dynarr[i], i + 10, "in_dynarr"); /* now set new values and attach to get them into outX variables */ data->in1 = 1; data->in2 = 2; bss->in3 = 3; bss->in4 = 4; bss->in5.a = 5; bss->in5.b = 6; kcfg = skel->kconfig; skel->data_read_mostly->read_mostly_var = 123; err = test_skeleton__attach(skel); if (CHECK(err, "skel_attach", "skeleton attach failed: %d\n", err)) goto cleanup; /* trigger tracepoint */ usleep(1); CHECK(data->out1 != 1, "res1", "got %d != exp %d\n", data->out1, 1); CHECK(data->out2 != 2, "res2", "got %lld != exp %d\n", data->out2, 2); CHECK(bss->out3 != 3, "res3", "got %d != exp %d\n", (int)bss->out3, 3); CHECK(bss->out4 != 4, "res4", "got %lld != exp %d\n", bss->out4, 4); CHECK(bss->out5.a != 5, "res5", "got %d != exp %d\n", bss->out5.a, 5); CHECK(bss->out5.b != 6, "res6", "got %lld != exp %d\n", bss->out5.b, 6); CHECK(bss->out6 != 14, "res7", "got %d != exp %d\n", bss->out6, 14); CHECK(bss->bpf_syscall != kcfg->CONFIG_BPF_SYSCALL, "ext1", "got %d != exp %d\n", bss->bpf_syscall, kcfg->CONFIG_BPF_SYSCALL); CHECK(bss->kern_ver != kcfg->LINUX_KERNEL_VERSION, "ext2", "got %d != exp %d\n", bss->kern_ver, kcfg->LINUX_KERNEL_VERSION); for (i = 0; i < 4; i++) ASSERT_EQ(data_dyn->out_dynarr[i], i + 10, "out_dynarr"); ASSERT_EQ(skel->bss->out_mostly_var, 123, "out_mostly_var"); ASSERT_EQ(bss->huge_arr[ARRAY_SIZE(bss->huge_arr) - 1], 123, "huge_arr"); fd = bpf_map__fd(skel->maps.data_non_mmapable); m = mmap(NULL, getpagesize(), PROT_READ, MAP_SHARED, fd, 0); if (!ASSERT_EQ(m, MAP_FAILED, "unexpected_mmap_success")) munmap(m, getpagesize()); ASSERT_EQ(bpf_map__map_flags(skel->maps.data_non_mmapable), 0, "non_mmap_flags"); elf_bytes = test_skeleton__elf_bytes(&elf_bytes_sz); ASSERT_OK_PTR(elf_bytes, "elf_bytes"); ASSERT_GE(elf_bytes_sz, 0, "elf_bytes_sz"); cleanup: test_skeleton__destroy(skel); } |