On Thu, Jun 25, 2020 at 5:15 PM Song Liu <songliubraving@xxxxxx> wrote:
>
> The new test is similar to other bpf_iter tests.
>
> Signed-off-by: Song Liu <songliubraving@xxxxxx>
> ---
> .../selftests/bpf/prog_tests/bpf_iter.c | 17 ++++++
> .../selftests/bpf/progs/bpf_iter_task_stack.c | 60 +++++++++++++++++++
> 2 files changed, 77 insertions(+)
> create mode 100644 tools/testing/selftests/bpf/progs/bpf_iter_task_stack.c
>
> diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c
> index 87c29dde1cf96..baa83328f810d 100644
> --- a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c
> +++ b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c
> @@ -5,6 +5,7 @@
> #include "bpf_iter_netlink.skel.h"
> #include "bpf_iter_bpf_map.skel.h"
> #include "bpf_iter_task.skel.h"
> +#include "bpf_iter_task_stack.skel.h"
> #include "bpf_iter_task_file.skel.h"
> #include "bpf_iter_test_kern1.skel.h"
> #include "bpf_iter_test_kern2.skel.h"
> @@ -106,6 +107,20 @@ static void test_task(void)
> bpf_iter_task__destroy(skel);
> }
>
> +static void test_task_stack(void)
> +{
> + struct bpf_iter_task_stack *skel;
> +
> + skel = bpf_iter_task_stack__open_and_load();
> + if (CHECK(!skel, "bpf_iter_task_stack__open_and_load",
> + "skeleton open_and_load failed\n"))
> + return;
> +
> + do_dummy_read(skel->progs.dump_task_stack);
> +
> + bpf_iter_task_stack__destroy(skel);
> +}
> +
> static void test_task_file(void)
> {
> struct bpf_iter_task_file *skel;
> @@ -392,6 +407,8 @@ void test_bpf_iter(void)
> test_bpf_map();
> if (test__start_subtest("task"))
> test_task();
> + if (test__start_subtest("task_stack"))
> + test_task_stack();
> if (test__start_subtest("task_file"))
> test_task_file();
> if (test__start_subtest("anon"))
> diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_task_stack.c b/tools/testing/selftests/bpf/progs/bpf_iter_task_stack.c
> new file mode 100644
> index 0000000000000..83aca5b1a7965
> --- /dev/null
> +++ b/tools/testing/selftests/bpf/progs/bpf_iter_task_stack.c
> @@ -0,0 +1,60 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/* Copyright (c) 2020 Facebook */
> +/* "undefine" structs in vmlinux.h, because we "override" them below */
> +#define bpf_iter_meta bpf_iter_meta___not_used
> +#define bpf_iter__task bpf_iter__task___not_used
> +#include "vmlinux.h"
> +#undef bpf_iter_meta
> +#undef bpf_iter__task
> +#include <bpf/bpf_helpers.h>
> +#include <bpf/bpf_tracing.h>
> +
> +char _license[] SEC("license") = "GPL";
> +
> +/* bpf_get_task_stack needs a stackmap to work */
no it doesn't anymore :) please drop
[...]
