1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2019 Facebook */
3
4 #include <test_progs.h>
5
6 struct s {
7 int a;
8 long long b;
9 } __attribute__((packed));
10
11 #include "test_skeleton.skel.h"
12
test_skeleton(void)13 void test_skeleton(void)
14 {
15 int duration = 0, err;
16 struct test_skeleton* skel;
17 struct test_skeleton__bss *bss;
18 struct test_skeleton__data *data;
19 struct test_skeleton__rodata *rodata;
20 struct test_skeleton__kconfig *kcfg;
21
22 skel = test_skeleton__open();
23 if (CHECK(!skel, "skel_open", "failed to open skeleton\n"))
24 return;
25
26 if (CHECK(skel->kconfig, "skel_kconfig", "kconfig is mmaped()!\n"))
27 goto cleanup;
28
29 bss = skel->bss;
30 data = skel->data;
31 rodata = skel->rodata;
32
33 /* validate values are pre-initialized correctly */
34 CHECK(data->in1 != -1, "in1", "got %d != exp %d\n", data->in1, -1);
35 CHECK(data->out1 != -1, "out1", "got %d != exp %d\n", data->out1, -1);
36 CHECK(data->in2 != -1, "in2", "got %lld != exp %lld\n", data->in2, -1LL);
37 CHECK(data->out2 != -1, "out2", "got %lld != exp %lld\n", data->out2, -1LL);
38
39 CHECK(bss->in3 != 0, "in3", "got %d != exp %d\n", bss->in3, 0);
40 CHECK(bss->out3 != 0, "out3", "got %d != exp %d\n", bss->out3, 0);
41 CHECK(bss->in4 != 0, "in4", "got %lld != exp %lld\n", bss->in4, 0LL);
42 CHECK(bss->out4 != 0, "out4", "got %lld != exp %lld\n", bss->out4, 0LL);
43
44 CHECK(rodata->in.in6 != 0, "in6", "got %d != exp %d\n", rodata->in.in6, 0);
45 CHECK(bss->out6 != 0, "out6", "got %d != exp %d\n", bss->out6, 0);
46
47 /* validate we can pre-setup global variables, even in .bss */
48 data->in1 = 10;
49 data->in2 = 11;
50 bss->in3 = 12;
51 bss->in4 = 13;
52 rodata->in.in6 = 14;
53
54 err = test_skeleton__load(skel);
55 if (CHECK(err, "skel_load", "failed to load skeleton: %d\n", err))
56 goto cleanup;
57
58 /* validate pre-setup values are still there */
59 CHECK(data->in1 != 10, "in1", "got %d != exp %d\n", data->in1, 10);
60 CHECK(data->in2 != 11, "in2", "got %lld != exp %lld\n", data->in2, 11LL);
61 CHECK(bss->in3 != 12, "in3", "got %d != exp %d\n", bss->in3, 12);
62 CHECK(bss->in4 != 13, "in4", "got %lld != exp %lld\n", bss->in4, 13LL);
63 CHECK(rodata->in.in6 != 14, "in6", "got %d != exp %d\n", rodata->in.in6, 14);
64
65 /* now set new values and attach to get them into outX variables */
66 data->in1 = 1;
67 data->in2 = 2;
68 bss->in3 = 3;
69 bss->in4 = 4;
70 bss->in5.a = 5;
71 bss->in5.b = 6;
72 kcfg = skel->kconfig;
73
74 err = test_skeleton__attach(skel);
75 if (CHECK(err, "skel_attach", "skeleton attach failed: %d\n", err))
76 goto cleanup;
77
78 /* trigger tracepoint */
79 usleep(1);
80
81 CHECK(data->out1 != 1, "res1", "got %d != exp %d\n", data->out1, 1);
82 CHECK(data->out2 != 2, "res2", "got %lld != exp %d\n", data->out2, 2);
83 CHECK(bss->out3 != 3, "res3", "got %d != exp %d\n", (int)bss->out3, 3);
84 CHECK(bss->out4 != 4, "res4", "got %lld != exp %d\n", bss->out4, 4);
85 CHECK(bss->handler_out5.a != 5, "res5", "got %d != exp %d\n",
86 bss->handler_out5.a, 5);
87 CHECK(bss->handler_out5.b != 6, "res6", "got %lld != exp %d\n",
88 bss->handler_out5.b, 6);
89 CHECK(bss->out6 != 14, "res7", "got %d != exp %d\n", bss->out6, 14);
90
91 CHECK(bss->bpf_syscall != kcfg->CONFIG_BPF_SYSCALL, "ext1",
92 "got %d != exp %d\n", bss->bpf_syscall, kcfg->CONFIG_BPF_SYSCALL);
93 CHECK(bss->kern_ver != kcfg->LINUX_KERNEL_VERSION, "ext2",
94 "got %d != exp %d\n", bss->kern_ver, kcfg->LINUX_KERNEL_VERSION);
95
96 cleanup:
97 test_skeleton__destroy(skel);
98 }
99