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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /tools/testing/selftests/bpf/prog_tests/attach_probe.c | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/attach_probe.c')
-rw-r--r-- | tools/testing/selftests/bpf/prog_tests/attach_probe.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/attach_probe.c b/tools/testing/selftests/bpf/prog_tests/attach_probe.c new file mode 100644 index 000000000..a0ee87c8e --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/attach_probe.c @@ -0,0 +1,105 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <test_progs.h> +#include "test_attach_probe.skel.h" + +ssize_t get_base_addr() { + size_t start, offset; + char buf[256]; + FILE *f; + + f = fopen("/proc/self/maps", "r"); + if (!f) + return -errno; + + while (fscanf(f, "%zx-%*x %s %zx %*[^\n]\n", + &start, buf, &offset) == 3) { + if (strcmp(buf, "r-xp") == 0) { + fclose(f); + return start - offset; + } + } + + fclose(f); + return -EINVAL; +} + +void test_attach_probe(void) +{ + int duration = 0; + struct bpf_link *kprobe_link, *kretprobe_link; + struct bpf_link *uprobe_link, *uretprobe_link; + struct test_attach_probe* skel; + size_t uprobe_offset; + ssize_t base_addr; + + base_addr = get_base_addr(); + if (CHECK(base_addr < 0, "get_base_addr", + "failed to find base addr: %zd", base_addr)) + return; + uprobe_offset = (size_t)&get_base_addr - base_addr; + + skel = test_attach_probe__open_and_load(); + if (CHECK(!skel, "skel_open", "failed to open skeleton\n")) + return; + if (CHECK(!skel->bss, "check_bss", ".bss wasn't mmap()-ed\n")) + goto cleanup; + + kprobe_link = bpf_program__attach_kprobe(skel->progs.handle_kprobe, + false /* retprobe */, + SYS_NANOSLEEP_KPROBE_NAME); + if (CHECK(IS_ERR(kprobe_link), "attach_kprobe", + "err %ld\n", PTR_ERR(kprobe_link))) + goto cleanup; + skel->links.handle_kprobe = kprobe_link; + + kretprobe_link = bpf_program__attach_kprobe(skel->progs.handle_kretprobe, + true /* retprobe */, + SYS_NANOSLEEP_KPROBE_NAME); + if (CHECK(IS_ERR(kretprobe_link), "attach_kretprobe", + "err %ld\n", PTR_ERR(kretprobe_link))) + goto cleanup; + skel->links.handle_kretprobe = kretprobe_link; + + uprobe_link = bpf_program__attach_uprobe(skel->progs.handle_uprobe, + false /* retprobe */, + 0 /* self pid */, + "/proc/self/exe", + uprobe_offset); + if (CHECK(IS_ERR(uprobe_link), "attach_uprobe", + "err %ld\n", PTR_ERR(uprobe_link))) + goto cleanup; + skel->links.handle_uprobe = uprobe_link; + + uretprobe_link = bpf_program__attach_uprobe(skel->progs.handle_uretprobe, + true /* retprobe */, + -1 /* any pid */, + "/proc/self/exe", + uprobe_offset); + if (CHECK(IS_ERR(uretprobe_link), "attach_uretprobe", + "err %ld\n", PTR_ERR(uretprobe_link))) + goto cleanup; + skel->links.handle_uretprobe = uretprobe_link; + + /* trigger & validate kprobe && kretprobe */ + usleep(1); + + if (CHECK(skel->bss->kprobe_res != 1, "check_kprobe_res", + "wrong kprobe res: %d\n", skel->bss->kprobe_res)) + goto cleanup; + if (CHECK(skel->bss->kretprobe_res != 2, "check_kretprobe_res", + "wrong kretprobe res: %d\n", skel->bss->kretprobe_res)) + goto cleanup; + + /* trigger & validate uprobe & uretprobe */ + get_base_addr(); + + if (CHECK(skel->bss->uprobe_res != 3, "check_uprobe_res", + "wrong uprobe res: %d\n", skel->bss->uprobe_res)) + goto cleanup; + if (CHECK(skel->bss->uretprobe_res != 4, "check_uretprobe_res", + "wrong uretprobe res: %d\n", skel->bss->uretprobe_res)) + goto cleanup; + +cleanup: + test_attach_probe__destroy(skel); +} |