1 // SPDX-License-Identifier: GPL-2.0
2 #include <test_progs.h>
3 #include "test_attach_probe.skel.h"
5 ssize_t get_base_addr() {
10 f = fopen("/proc/self/maps", "r");
14 while (fscanf(f, "%zx-%*x %s %zx %*[^\n]\n",
15 &start, buf, &offset) == 3) {
16 if (strcmp(buf, "r-xp") == 0) {
18 return start - offset;
26 void test_attach_probe(void)
29 struct bpf_link *kprobe_link, *kretprobe_link;
30 struct bpf_link *uprobe_link, *uretprobe_link;
31 struct test_attach_probe* skel;
35 base_addr = get_base_addr();
36 if (CHECK(base_addr < 0, "get_base_addr",
37 "failed to find base addr: %zd", base_addr))
39 uprobe_offset = (size_t)&get_base_addr - base_addr;
41 skel = test_attach_probe__open_and_load();
42 if (CHECK(!skel, "skel_open", "failed to open skeleton\n"))
44 if (CHECK(!skel->bss, "check_bss", ".bss wasn't mmap()-ed\n"))
47 kprobe_link = bpf_program__attach_kprobe(skel->progs.handle_kprobe,
49 SYS_NANOSLEEP_KPROBE_NAME);
50 if (CHECK(IS_ERR(kprobe_link), "attach_kprobe",
51 "err %ld\n", PTR_ERR(kprobe_link)))
53 skel->links.handle_kprobe = kprobe_link;
55 kretprobe_link = bpf_program__attach_kprobe(skel->progs.handle_kretprobe,
57 SYS_NANOSLEEP_KPROBE_NAME);
58 if (CHECK(IS_ERR(kretprobe_link), "attach_kretprobe",
59 "err %ld\n", PTR_ERR(kretprobe_link)))
61 skel->links.handle_kretprobe = kretprobe_link;
63 uprobe_link = bpf_program__attach_uprobe(skel->progs.handle_uprobe,
68 if (CHECK(IS_ERR(uprobe_link), "attach_uprobe",
69 "err %ld\n", PTR_ERR(uprobe_link)))
71 skel->links.handle_uprobe = uprobe_link;
73 uretprobe_link = bpf_program__attach_uprobe(skel->progs.handle_uretprobe,
78 if (CHECK(IS_ERR(uretprobe_link), "attach_uretprobe",
79 "err %ld\n", PTR_ERR(uretprobe_link)))
81 skel->links.handle_uretprobe = uretprobe_link;
83 /* trigger & validate kprobe && kretprobe */
86 if (CHECK(skel->bss->kprobe_res != 1, "check_kprobe_res",
87 "wrong kprobe res: %d\n", skel->bss->kprobe_res))
89 if (CHECK(skel->bss->kretprobe_res != 2, "check_kretprobe_res",
90 "wrong kretprobe res: %d\n", skel->bss->kretprobe_res))
93 /* trigger & validate uprobe & uretprobe */
96 if (CHECK(skel->bss->uprobe_res != 3, "check_uprobe_res",
97 "wrong uprobe res: %d\n", skel->bss->uprobe_res))
99 if (CHECK(skel->bss->uretprobe_res != 4, "check_uretprobe_res",
100 "wrong uretprobe res: %d\n", skel->bss->uretprobe_res))
104 test_attach_probe__destroy(skel);