diff options
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/subprogs.c')
-rw-r--r-- | tools/testing/selftests/bpf/prog_tests/subprogs.c | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/subprogs.c b/tools/testing/selftests/bpf/prog_tests/subprogs.c new file mode 100644 index 0000000000..903f35a9e6 --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/subprogs.c @@ -0,0 +1,96 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2020 Facebook */ +#include <test_progs.h> +#include "test_subprogs.skel.h" +#include "test_subprogs_unused.skel.h" + +struct toggler_ctx { + int fd; + bool stop; +}; + +static void *toggle_jit_harden(void *arg) +{ + struct toggler_ctx *ctx = arg; + char two = '2'; + char zero = '0'; + + while (!ctx->stop) { + lseek(ctx->fd, SEEK_SET, 0); + write(ctx->fd, &two, sizeof(two)); + lseek(ctx->fd, SEEK_SET, 0); + write(ctx->fd, &zero, sizeof(zero)); + } + + return NULL; +} + +static void test_subprogs_with_jit_harden_toggling(void) +{ + struct toggler_ctx ctx; + pthread_t toggler; + int err; + unsigned int i, loop = 10; + + ctx.fd = open("/proc/sys/net/core/bpf_jit_harden", O_RDWR); + if (!ASSERT_GE(ctx.fd, 0, "open bpf_jit_harden")) + return; + + ctx.stop = false; + err = pthread_create(&toggler, NULL, toggle_jit_harden, &ctx); + if (!ASSERT_OK(err, "new toggler")) + goto out; + + /* Make toggler thread to run */ + usleep(1); + + for (i = 0; i < loop; i++) { + struct test_subprogs *skel = test_subprogs__open_and_load(); + + if (!ASSERT_OK_PTR(skel, "skel open")) + break; + test_subprogs__destroy(skel); + } + + ctx.stop = true; + pthread_join(toggler, NULL); +out: + close(ctx.fd); +} + +static void test_subprogs_alone(void) +{ + struct test_subprogs *skel; + struct test_subprogs_unused *skel2; + int err; + + skel = test_subprogs__open_and_load(); + if (!ASSERT_OK_PTR(skel, "skel_open")) + return; + + err = test_subprogs__attach(skel); + if (!ASSERT_OK(err, "skel attach")) + goto cleanup; + + usleep(1); + + ASSERT_EQ(skel->bss->res1, 12, "res1"); + ASSERT_EQ(skel->bss->res2, 17, "res2"); + ASSERT_EQ(skel->bss->res3, 19, "res3"); + ASSERT_EQ(skel->bss->res4, 36, "res4"); + + skel2 = test_subprogs_unused__open_and_load(); + ASSERT_OK_PTR(skel2, "unused_progs_skel"); + test_subprogs_unused__destroy(skel2); + +cleanup: + test_subprogs__destroy(skel); +} + +void test_subprogs(void) +{ + if (test__start_subtest("subprogs_alone")) + test_subprogs_alone(); + if (test__start_subtest("subprogs_and_jit_harden")) + test_subprogs_with_jit_harden_toggling(); +} |