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selftests/bpf: Add uprobe_multi link test

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Adding uprobe_multi test for bpf_link_create attach function.

Testing attachment using the struct bpf_link_create_opts.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20230809083440.3209381-22-jolsa@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Jiri Olsa 2023-08-09 10:34:33 +02:00 committed by Alexei Starovoitov
parent ffc6890361
commit a93d22ea60
1 changed files with 69 additions and 0 deletions
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69
tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c
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@ -3,6 +3,7 @@
#include <unistd.h>
#include <test_progs.h>
#include "uprobe_multi.skel.h"
#include "bpf/libbpf_internal.h"
static char test_data[] = "test_data";
@ -130,6 +131,72 @@ static void test_attach_api_syms(void)
test_attach_api("/proc/self/exe", NULL, &opts);
}
static void test_link_api(void)
{
int prog_fd, link1_fd = -1, link2_fd = -1, link3_fd = -1, link4_fd = -1;
LIBBPF_OPTS(bpf_link_create_opts, opts);
const char *path = "/proc/self/exe";
struct uprobe_multi *skel = NULL;
unsigned long *offsets = NULL;
const char *syms[3] = {
"uprobe_multi_func_1",
"uprobe_multi_func_2",
"uprobe_multi_func_3",
};
int err;
err = elf_resolve_syms_offsets(path, 3, syms, (unsigned long **) &offsets);
if (!ASSERT_OK(err, "elf_resolve_syms_offsets"))
return;
opts.uprobe_multi.path = path;
opts.uprobe_multi.offsets = offsets;
opts.uprobe_multi.cnt = ARRAY_SIZE(syms);
skel = uprobe_multi__open_and_load();
if (!ASSERT_OK_PTR(skel, "uprobe_multi__open_and_load"))
goto cleanup;
opts.kprobe_multi.flags = 0;
prog_fd = bpf_program__fd(skel->progs.uprobe);
link1_fd = bpf_link_create(prog_fd, 0, BPF_TRACE_UPROBE_MULTI, &opts);
if (!ASSERT_GE(link1_fd, 0, "link1_fd"))
goto cleanup;
opts.kprobe_multi.flags = BPF_F_UPROBE_MULTI_RETURN;
prog_fd = bpf_program__fd(skel->progs.uretprobe);
link2_fd = bpf_link_create(prog_fd, 0, BPF_TRACE_UPROBE_MULTI, &opts);
if (!ASSERT_GE(link2_fd, 0, "link2_fd"))
goto cleanup;
opts.kprobe_multi.flags = 0;
prog_fd = bpf_program__fd(skel->progs.uprobe_sleep);
link3_fd = bpf_link_create(prog_fd, 0, BPF_TRACE_UPROBE_MULTI, &opts);
if (!ASSERT_GE(link3_fd, 0, "link3_fd"))
goto cleanup;
opts.kprobe_multi.flags = BPF_F_UPROBE_MULTI_RETURN;
prog_fd = bpf_program__fd(skel->progs.uretprobe_sleep);
link4_fd = bpf_link_create(prog_fd, 0, BPF_TRACE_UPROBE_MULTI, &opts);
if (!ASSERT_GE(link4_fd, 0, "link4_fd"))
goto cleanup;
uprobe_multi_test_run(skel);
cleanup:
if (link1_fd >= 0)
close(link1_fd);
if (link2_fd >= 0)
close(link2_fd);
if (link3_fd >= 0)
close(link3_fd);
if (link4_fd >= 0)
close(link4_fd);
uprobe_multi__destroy(skel);
free(offsets);
}
void test_uprobe_multi_test(void)
{
if (test__start_subtest("skel_api"))
@ -138,4 +205,6 @@ void test_uprobe_multi_test(void)
test_attach_api_pattern();
if (test__start_subtest("attach_api_syms"))
test_attach_api_syms();
if (test__start_subtest("link_api"))
test_link_api();
}