1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (c) 2019 Facebook */ 3 4 #include <test_progs.h> 5 #include <sys/mman.h> 6 7 struct s { 8 int a; 9 long long b; 10 } __attribute__((packed)); 11 12 #include "test_skeleton.skel.h" 13 14 void test_skeleton(void) 15 { 16 int duration = 0, err; 17 struct test_skeleton* skel; 18 struct test_skeleton__bss *bss; 19 struct test_skeleton__data *data; 20 struct test_skeleton__data_dyn *data_dyn; 21 struct test_skeleton__rodata *rodata; 22 struct test_skeleton__rodata_dyn *rodata_dyn; 23 struct test_skeleton__kconfig *kcfg; 24 const void *elf_bytes; 25 size_t elf_bytes_sz = 0; 26 void *m; 27 int i, fd; 28 29 skel = test_skeleton__open(); 30 if (CHECK(!skel, "skel_open", "failed to open skeleton\n")) 31 return; 32 33 if (CHECK(skel->kconfig, "skel_kconfig", "kconfig is mmaped()!\n")) 34 goto cleanup; 35 36 bss = skel->bss; 37 data = skel->data; 38 data_dyn = skel->data_dyn; 39 rodata = skel->rodata; 40 rodata_dyn = skel->rodata_dyn; 41 42 ASSERT_STREQ(bpf_map__name(skel->maps.rodata_dyn), ".rodata.dyn", "rodata_dyn_name"); 43 ASSERT_STREQ(bpf_map__name(skel->maps.data_dyn), ".data.dyn", "data_dyn_name"); 44 45 /* validate values are pre-initialized correctly */ 46 CHECK(data->in1 != -1, "in1", "got %d != exp %d\n", data->in1, -1); 47 CHECK(data->out1 != -1, "out1", "got %d != exp %d\n", data->out1, -1); 48 CHECK(data->in2 != -1, "in2", "got %lld != exp %lld\n", data->in2, -1LL); 49 CHECK(data->out2 != -1, "out2", "got %lld != exp %lld\n", data->out2, -1LL); 50 51 CHECK(bss->in3 != 0, "in3", "got %d != exp %d\n", bss->in3, 0); 52 CHECK(bss->out3 != 0, "out3", "got %d != exp %d\n", bss->out3, 0); 53 CHECK(bss->in4 != 0, "in4", "got %lld != exp %lld\n", bss->in4, 0LL); 54 CHECK(bss->out4 != 0, "out4", "got %lld != exp %lld\n", bss->out4, 0LL); 55 56 CHECK(rodata->in.in6 != 0, "in6", "got %d != exp %d\n", rodata->in.in6, 0); 57 CHECK(bss->out6 != 0, "out6", "got %d != exp %d\n", bss->out6, 0); 58 59 ASSERT_EQ(rodata_dyn->in_dynarr_sz, 0, "in_dynarr_sz"); 60 for (i = 0; i < 4; i++) 61 ASSERT_EQ(rodata_dyn->in_dynarr[i], -(i + 1), "in_dynarr"); 62 for (i = 0; i < 4; i++) 63 ASSERT_EQ(data_dyn->out_dynarr[i], i + 1, "out_dynarr"); 64 65 /* validate we can pre-setup global variables, even in .bss */ 66 data->in1 = 10; 67 data->in2 = 11; 68 bss->in3 = 12; 69 bss->in4 = 13; 70 rodata->in.in6 = 14; 71 72 rodata_dyn->in_dynarr_sz = 4; 73 for (i = 0; i < 4; i++) 74 rodata_dyn->in_dynarr[i] = i + 10; 75 76 err = test_skeleton__load(skel); 77 if (CHECK(err, "skel_load", "failed to load skeleton: %d\n", err)) 78 goto cleanup; 79 80 /* validate pre-setup values are still there */ 81 CHECK(data->in1 != 10, "in1", "got %d != exp %d\n", data->in1, 10); 82 CHECK(data->in2 != 11, "in2", "got %lld != exp %lld\n", data->in2, 11LL); 83 CHECK(bss->in3 != 12, "in3", "got %d != exp %d\n", bss->in3, 12); 84 CHECK(bss->in4 != 13, "in4", "got %lld != exp %lld\n", bss->in4, 13LL); 85 CHECK(rodata->in.in6 != 14, "in6", "got %d != exp %d\n", rodata->in.in6, 14); 86 87 ASSERT_EQ(rodata_dyn->in_dynarr_sz, 4, "in_dynarr_sz"); 88 for (i = 0; i < 4; i++) 89 ASSERT_EQ(rodata_dyn->in_dynarr[i], i + 10, "in_dynarr"); 90 91 /* now set new values and attach to get them into outX variables */ 92 data->in1 = 1; 93 data->in2 = 2; 94 bss->in3 = 3; 95 bss->in4 = 4; 96 bss->in5.a = 5; 97 bss->in5.b = 6; 98 kcfg = skel->kconfig; 99 100 skel->data_read_mostly->read_mostly_var = 123; 101 102 err = test_skeleton__attach(skel); 103 if (CHECK(err, "skel_attach", "skeleton attach failed: %d\n", err)) 104 goto cleanup; 105 106 /* trigger tracepoint */ 107 usleep(1); 108 109 CHECK(data->out1 != 1, "res1", "got %d != exp %d\n", data->out1, 1); 110 CHECK(data->out2 != 2, "res2", "got %lld != exp %d\n", data->out2, 2); 111 CHECK(bss->out3 != 3, "res3", "got %d != exp %d\n", (int)bss->out3, 3); 112 CHECK(bss->out4 != 4, "res4", "got %lld != exp %d\n", bss->out4, 4); 113 CHECK(bss->out5.a != 5, "res5", "got %d != exp %d\n", bss->out5.a, 5); 114 CHECK(bss->out5.b != 6, "res6", "got %lld != exp %d\n", bss->out5.b, 6); 115 CHECK(bss->out6 != 14, "res7", "got %d != exp %d\n", bss->out6, 14); 116 117 CHECK(bss->bpf_syscall != kcfg->CONFIG_BPF_SYSCALL, "ext1", 118 "got %d != exp %d\n", bss->bpf_syscall, kcfg->CONFIG_BPF_SYSCALL); 119 CHECK(bss->kern_ver != kcfg->LINUX_KERNEL_VERSION, "ext2", 120 "got %d != exp %d\n", bss->kern_ver, kcfg->LINUX_KERNEL_VERSION); 121 122 for (i = 0; i < 4; i++) 123 ASSERT_EQ(data_dyn->out_dynarr[i], i + 10, "out_dynarr"); 124 125 ASSERT_EQ(skel->bss->out_mostly_var, 123, "out_mostly_var"); 126 127 ASSERT_EQ(bss->huge_arr[ARRAY_SIZE(bss->huge_arr) - 1], 123, "huge_arr"); 128 129 fd = bpf_map__fd(skel->maps.data_non_mmapable); 130 m = mmap(NULL, getpagesize(), PROT_READ, MAP_SHARED, fd, 0); 131 if (!ASSERT_EQ(m, MAP_FAILED, "unexpected_mmap_success")) 132 munmap(m, getpagesize()); 133 134 ASSERT_EQ(bpf_map__map_flags(skel->maps.data_non_mmapable), 0, "non_mmap_flags"); 135 136 elf_bytes = test_skeleton__elf_bytes(&elf_bytes_sz); 137 ASSERT_OK_PTR(elf_bytes, "elf_bytes"); 138 ASSERT_GE(elf_bytes_sz, 0, "elf_bytes_sz"); 139 140 cleanup: 141 test_skeleton__destroy(skel); 142 } 143