On Thu, Oct 10, 2024 at 1:12 PM Jiri Olsa <[email protected]> wrote: > > Making sure uprobe.session program can return only [0,1] values. > > Signed-off-by: Jiri Olsa <[email protected]> > --- > .../bpf/prog_tests/uprobe_multi_test.c | 2 ++ > .../bpf/progs/uprobe_multi_verifier.c | 31 +++++++++++++++++++ > 2 files changed, 33 insertions(+) > create mode 100644 tools/testing/selftests/bpf/progs/uprobe_multi_verifier.c >
Nice Acked-by: Andrii Nakryiko <[email protected]> > diff --git a/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c > b/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c > index 284cd7fce576..e693eeb1a5a5 100644 > --- a/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c > +++ b/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c > @@ -11,6 +11,7 @@ > #include "uprobe_multi_session.skel.h" > #include "uprobe_multi_session_cookie.skel.h" > #include "uprobe_multi_session_recursive.skel.h" > +#include "uprobe_multi_verifier.skel.h" > #include "bpf/libbpf_internal.h" > #include "testing_helpers.h" > #include "../sdt.h" > @@ -1246,4 +1247,5 @@ void test_uprobe_multi_test(void) > test_session_cookie_skel_api(); > if (test__start_subtest("session_cookie_recursive")) > test_session_recursive_skel_api(); > + RUN_TESTS(uprobe_multi_verifier); > } > diff --git a/tools/testing/selftests/bpf/progs/uprobe_multi_verifier.c > b/tools/testing/selftests/bpf/progs/uprobe_multi_verifier.c > new file mode 100644 > index 000000000000..fe49f2cb5360 > --- /dev/null > +++ b/tools/testing/selftests/bpf/progs/uprobe_multi_verifier.c > @@ -0,0 +1,31 @@ > +// SPDX-License-Identifier: GPL-2.0 > +#include "vmlinux.h" > +#include <bpf/bpf_helpers.h> > +#include <bpf/bpf_tracing.h> > +#include <bpf/usdt.bpf.h> > +#include "bpf_misc.h" > + > +char _license[] SEC("license") = "GPL"; > + > + > +SEC("uprobe.session") > +__success > +int uprobe_sesison_return_0(struct pt_regs *ctx) > +{ > + return 0; > +} > + > +SEC("uprobe.session") > +__success > +int uprobe_sesison_return_1(struct pt_regs *ctx) > +{ > + return 1; > +} > + > +SEC("uprobe.session") > +__failure > +__msg("At program exit the register R0 has smin=2 smax=2 should have been in > [0, 1]") > +int uprobe_sesison_return_2(struct pt_regs *ctx) > +{ > + return 2; > +} > -- > 2.46.2 >
