| Message ID | 20240701164115.723677-7-jolsa@kernel.org (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | uprobe, bpf: Add session support | expand |
On Mon, Jul 1, 2024 at 9:43 AM Jiri Olsa <jolsa@kernel.org> wrote: > > Adding uprobe session test and testing that the entry program > return value controls execution of the return probe program. > > Signed-off-by: Jiri Olsa <jolsa@kernel.org> > --- > .../bpf/prog_tests/uprobe_multi_test.c | 42 +++++++++++++++ > .../bpf/progs/uprobe_multi_session.c | 53 +++++++++++++++++++ > 2 files changed, 95 insertions(+) > create mode 100644 tools/testing/selftests/bpf/progs/uprobe_multi_session.c > LGTM. Acked-by: Andrii Nakryiko <andrii@kernel.org> > 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 bf6ca8e3eb13..cd9581f46c73 100644 > --- a/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c > +++ b/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c > @@ -6,6 +6,7 @@ > #include "uprobe_multi.skel.h" > #include "uprobe_multi_bench.skel.h" > #include "uprobe_multi_usdt.skel.h" > +#include "uprobe_multi_session.skel.h" > #include "bpf/libbpf_internal.h" > #include "testing_helpers.h" > #include "../sdt.h" > @@ -615,6 +616,45 @@ static void test_link_api(void) > __test_link_api(child); > } > > +static void test_session_skel_api(void) > +{ > + struct uprobe_multi_session *skel = NULL; > + LIBBPF_OPTS(bpf_kprobe_multi_opts, opts); > + struct bpf_link *link = NULL; > + int err; > + > + skel = uprobe_multi_session__open_and_load(); > + if (!ASSERT_OK_PTR(skel, "fentry_raw_skel_load")) > + goto cleanup; > + > + skel->bss->pid = getpid(); > + > + err = uprobe_multi_session__attach(skel); > + if (!ASSERT_OK(err, " uprobe_multi_session__attach")) > + goto cleanup; > + > + /* trigger all probes */ > + skel->bss->uprobe_multi_func_1_addr = (__u64) uprobe_multi_func_1; > + skel->bss->uprobe_multi_func_2_addr = (__u64) uprobe_multi_func_2; > + skel->bss->uprobe_multi_func_3_addr = (__u64) uprobe_multi_func_3; > + > + uprobe_multi_func_1(); > + uprobe_multi_func_2(); > + uprobe_multi_func_3(); > + > + /* > + * We expect 2 for uprobe_multi_func_2 because it runs both entry/return probe, > + * uprobe_multi_func_[13] run just the entry probe. > + */ > + ASSERT_EQ(skel->bss->uprobe_session_result[0], 1, "uprobe_multi_func_1_result"); > + ASSERT_EQ(skel->bss->uprobe_session_result[1], 2, "uprobe_multi_func_2_result"); > + ASSERT_EQ(skel->bss->uprobe_session_result[2], 1, "uprobe_multi_func_3_result"); > + > +cleanup: > + bpf_link__destroy(link); > + uprobe_multi_session__destroy(skel); > +} > + > static void test_bench_attach_uprobe(void) > { > long attach_start_ns = 0, attach_end_ns = 0; > @@ -703,4 +743,6 @@ void test_uprobe_multi_test(void) > test_bench_attach_usdt(); > if (test__start_subtest("attach_api_fails")) > test_attach_api_fails(); > + if (test__start_subtest("session")) > + test_session_skel_api(); > } > diff --git a/tools/testing/selftests/bpf/progs/uprobe_multi_session.c b/tools/testing/selftests/bpf/progs/uprobe_multi_session.c > new file mode 100644 > index 000000000000..72c00ae68372 > --- /dev/null > +++ b/tools/testing/selftests/bpf/progs/uprobe_multi_session.c > @@ -0,0 +1,53 @@ > +// SPDX-License-Identifier: GPL-2.0 > +#include <linux/bpf.h> > +#include <bpf/bpf_helpers.h> > +#include <bpf/bpf_tracing.h> > +#include <stdbool.h> > +#include "bpf_kfuncs.h" > +#include "bpf_misc.h" > + > +char _license[] SEC("license") = "GPL"; > + > +__u64 uprobe_multi_func_1_addr = 0; > +__u64 uprobe_multi_func_2_addr = 0; > +__u64 uprobe_multi_func_3_addr = 0; > + > +__u64 uprobe_session_result[3]; > + > +int pid = 0; > + > +static int uprobe_multi_check(void *ctx, bool is_return) > +{ > + const __u64 funcs[] = { > + uprobe_multi_func_1_addr, > + uprobe_multi_func_2_addr, > + uprobe_multi_func_3_addr, > + }; > + unsigned int i; > + __u64 addr; > + > + if (bpf_get_current_pid_tgid() >> 32 != pid) > + return 1; > + > + addr = bpf_get_func_ip(ctx); > + > + for (i = 0; i < ARRAY_SIZE(funcs); i++) { > + if (funcs[i] == addr) { > + uprobe_session_result[i]++; > + break; > + } > + } > + > + /* only uprobe_multi_func_2 executes return probe */ > + if ((addr == uprobe_multi_func_1_addr) || > + (addr == uprobe_multi_func_3_addr)) > + return 1; > + > + return 0; > +} > + > +SEC("uprobe.session//proc/self/exe:uprobe_multi_func_*") > +int uprobe(struct pt_regs *ctx) > +{ > + return uprobe_multi_check(ctx, bpf_session_is_return()); > +} > -- > 2.45.2 >
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 bf6ca8e3eb13..cd9581f46c73 100644 --- a/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c +++ b/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c @@ -6,6 +6,7 @@ #include "uprobe_multi.skel.h" #include "uprobe_multi_bench.skel.h" #include "uprobe_multi_usdt.skel.h" +#include "uprobe_multi_session.skel.h" #include "bpf/libbpf_internal.h" #include "testing_helpers.h" #include "../sdt.h" @@ -615,6 +616,45 @@ static void test_link_api(void) __test_link_api(child); } +static void test_session_skel_api(void) +{ + struct uprobe_multi_session *skel = NULL; + LIBBPF_OPTS(bpf_kprobe_multi_opts, opts); + struct bpf_link *link = NULL; + int err; + + skel = uprobe_multi_session__open_and_load(); + if (!ASSERT_OK_PTR(skel, "fentry_raw_skel_load")) + goto cleanup; + + skel->bss->pid = getpid(); + + err = uprobe_multi_session__attach(skel); + if (!ASSERT_OK(err, " uprobe_multi_session__attach")) + goto cleanup; + + /* trigger all probes */ + skel->bss->uprobe_multi_func_1_addr = (__u64) uprobe_multi_func_1; + skel->bss->uprobe_multi_func_2_addr = (__u64) uprobe_multi_func_2; + skel->bss->uprobe_multi_func_3_addr = (__u64) uprobe_multi_func_3; + + uprobe_multi_func_1(); + uprobe_multi_func_2(); + uprobe_multi_func_3(); + + /* + * We expect 2 for uprobe_multi_func_2 because it runs both entry/return probe, + * uprobe_multi_func_[13] run just the entry probe. + */ + ASSERT_EQ(skel->bss->uprobe_session_result[0], 1, "uprobe_multi_func_1_result"); + ASSERT_EQ(skel->bss->uprobe_session_result[1], 2, "uprobe_multi_func_2_result"); + ASSERT_EQ(skel->bss->uprobe_session_result[2], 1, "uprobe_multi_func_3_result"); + +cleanup: + bpf_link__destroy(link); + uprobe_multi_session__destroy(skel); +} + static void test_bench_attach_uprobe(void) { long attach_start_ns = 0, attach_end_ns = 0; @@ -703,4 +743,6 @@ void test_uprobe_multi_test(void) test_bench_attach_usdt(); if (test__start_subtest("attach_api_fails")) test_attach_api_fails(); + if (test__start_subtest("session")) + test_session_skel_api(); } diff --git a/tools/testing/selftests/bpf/progs/uprobe_multi_session.c b/tools/testing/selftests/bpf/progs/uprobe_multi_session.c new file mode 100644 index 000000000000..72c00ae68372 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/uprobe_multi_session.c @@ -0,0 +1,53 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/bpf.h> +#include <bpf/bpf_helpers.h> +#include <bpf/bpf_tracing.h> +#include <stdbool.h> +#include "bpf_kfuncs.h" +#include "bpf_misc.h" + +char _license[] SEC("license") = "GPL"; + +__u64 uprobe_multi_func_1_addr = 0; +__u64 uprobe_multi_func_2_addr = 0; +__u64 uprobe_multi_func_3_addr = 0; + +__u64 uprobe_session_result[3]; + +int pid = 0; + +static int uprobe_multi_check(void *ctx, bool is_return) +{ + const __u64 funcs[] = { + uprobe_multi_func_1_addr, + uprobe_multi_func_2_addr, + uprobe_multi_func_3_addr, + }; + unsigned int i; + __u64 addr; + + if (bpf_get_current_pid_tgid() >> 32 != pid) + return 1; + + addr = bpf_get_func_ip(ctx); + + for (i = 0; i < ARRAY_SIZE(funcs); i++) { + if (funcs[i] == addr) { + uprobe_session_result[i]++; + break; + } + } + + /* only uprobe_multi_func_2 executes return probe */ + if ((addr == uprobe_multi_func_1_addr) || + (addr == uprobe_multi_func_3_addr)) + return 1; + + return 0; +} + +SEC("uprobe.session//proc/self/exe:uprobe_multi_func_*") +int uprobe(struct pt_regs *ctx) +{ + return uprobe_multi_check(ctx, bpf_session_is_return()); +}
Adding uprobe session test and testing that the entry program return value controls execution of the return probe program. Signed-off-by: Jiri Olsa <jolsa@kernel.org> --- .../bpf/prog_tests/uprobe_multi_test.c | 42 +++++++++++++++ .../bpf/progs/uprobe_multi_session.c | 53 +++++++++++++++++++ 2 files changed, 95 insertions(+) create mode 100644 tools/testing/selftests/bpf/progs/uprobe_multi_session.c