On Thu, Jun 10, 2021 at 10:00:34AM -0700, Andrii Nakryiko wrote: > On Wed, Jun 9, 2021 at 7:29 AM Jiri Olsa <jolsa@xxxxxxxxxx> wrote: > > > > On Tue, Jun 08, 2021 at 10:40:24PM -0700, Andrii Nakryiko wrote: > > > On Sat, Jun 5, 2021 at 4:12 AM Jiri Olsa <jolsa@xxxxxxxxxx> wrote: > > > > > > > > Adding selftest for fentry multi func test that attaches > > > > to bpf_fentry_test* functions and checks argument values > > > > based on the processed function. > > > > > > > > Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx> > > > > --- > > > > tools/testing/selftests/bpf/multi_check.h | 52 +++++++++++++++++++ > > > > .../bpf/prog_tests/fentry_multi_test.c | 43 +++++++++++++++ > > > > .../selftests/bpf/progs/fentry_multi_test.c | 18 +++++++ > > > > 3 files changed, 113 insertions(+) > > > > create mode 100644 tools/testing/selftests/bpf/multi_check.h > > > > create mode 100644 tools/testing/selftests/bpf/prog_tests/fentry_multi_test.c > > > > create mode 100644 tools/testing/selftests/bpf/progs/fentry_multi_test.c > > > > > > > > diff --git a/tools/testing/selftests/bpf/multi_check.h b/tools/testing/selftests/bpf/multi_check.h > > > > new file mode 100644 > > > > index 000000000000..36c2a93f9be3 > > > > --- /dev/null > > > > +++ b/tools/testing/selftests/bpf/multi_check.h > > > > > > we have a proper static linking now, we don't have to use header > > > inclusion hacks, let's do this properly? > > > > ok, will change > > > > > > > > > @@ -0,0 +1,52 @@ > > > > +/* SPDX-License-Identifier: GPL-2.0 */ > > > > + > > > > +#ifndef __MULTI_CHECK_H > > > > +#define __MULTI_CHECK_H > > > > + > > > > +extern unsigned long long bpf_fentry_test[8]; > > > > + > > > > +static __attribute__((unused)) inline > > > > +void multi_arg_check(unsigned long ip, __u64 a, __u64 b, __u64 c, __u64 d, __u64 e, __u64 f, __u64 *test_result) > > > > +{ > > > > + if (ip == bpf_fentry_test[0]) { > > > > + *test_result += (int) a == 1; > > > > + } else if (ip == bpf_fentry_test[1]) { > > > > + *test_result += (int) a == 2 && (__u64) b == 3; > > > > + } else if (ip == bpf_fentry_test[2]) { > > > > + *test_result += (char) a == 4 && (int) b == 5 && (__u64) c == 6; > > > > + } else if (ip == bpf_fentry_test[3]) { > > > > + *test_result += (void *) a == (void *) 7 && (char) b == 8 && (int) c == 9 && (__u64) d == 10; > > > > + } else if (ip == bpf_fentry_test[4]) { > > > > + *test_result += (__u64) a == 11 && (void *) b == (void *) 12 && (short) c == 13 && (int) d == 14 && (__u64) e == 15; > > > > + } else if (ip == bpf_fentry_test[5]) { > > > > + *test_result += (__u64) a == 16 && (void *) b == (void *) 17 && (short) c == 18 && (int) d == 19 && (void *) e == (void *) 20 && (__u64) f == 21; > > > > + } else if (ip == bpf_fentry_test[6]) { > > > > + *test_result += 1; > > > > + } else if (ip == bpf_fentry_test[7]) { > > > > + *test_result += 1; > > > > + } > > > > > > why not use switch? and why the casting? > > > > hum, for switch I'd need constants right? > > doh, of course :) > > but! you don't need to fill out bpf_fentry_test[] array from > user-space, just use extern const void variables to get addresses of > those functions: > > extern const void bpf_fentry_test1 __ksym; > extern const void bpf_fentry_test2 __ksym; > ... nice, will use that jirka