97 lines · c
1// SPDX-License-Identifier: GPL-2.02/* Copyright (c) 2020 Facebook */3#include <test_progs.h>4#include "test_subprogs.skel.h"5#include "test_subprogs_unused.skel.h"6 7struct toggler_ctx {8 int fd;9 bool stop;10};11 12static void *toggle_jit_harden(void *arg)13{14 struct toggler_ctx *ctx = arg;15 char two = '2';16 char zero = '0';17 18 while (!ctx->stop) {19 lseek(ctx->fd, SEEK_SET, 0);20 write(ctx->fd, &two, sizeof(two));21 lseek(ctx->fd, SEEK_SET, 0);22 write(ctx->fd, &zero, sizeof(zero));23 }24 25 return NULL;26}27 28static void test_subprogs_with_jit_harden_toggling(void)29{30 struct toggler_ctx ctx;31 pthread_t toggler;32 int err;33 unsigned int i, loop = 10;34 35 ctx.fd = open("/proc/sys/net/core/bpf_jit_harden", O_RDWR);36 if (!ASSERT_GE(ctx.fd, 0, "open bpf_jit_harden"))37 return;38 39 ctx.stop = false;40 err = pthread_create(&toggler, NULL, toggle_jit_harden, &ctx);41 if (!ASSERT_OK(err, "new toggler"))42 goto out;43 44 /* Make toggler thread to run */45 usleep(1);46 47 for (i = 0; i < loop; i++) {48 struct test_subprogs *skel = test_subprogs__open_and_load();49 50 if (!ASSERT_OK_PTR(skel, "skel open"))51 break;52 test_subprogs__destroy(skel);53 }54 55 ctx.stop = true;56 pthread_join(toggler, NULL);57out:58 close(ctx.fd);59}60 61static void test_subprogs_alone(void)62{63 struct test_subprogs *skel;64 struct test_subprogs_unused *skel2;65 int err;66 67 skel = test_subprogs__open_and_load();68 if (!ASSERT_OK_PTR(skel, "skel_open"))69 return;70 71 err = test_subprogs__attach(skel);72 if (!ASSERT_OK(err, "skel attach"))73 goto cleanup;74 75 usleep(1);76 77 ASSERT_EQ(skel->bss->res1, 12, "res1");78 ASSERT_EQ(skel->bss->res2, 17, "res2");79 ASSERT_EQ(skel->bss->res3, 19, "res3");80 ASSERT_EQ(skel->bss->res4, 36, "res4");81 82 skel2 = test_subprogs_unused__open_and_load();83 ASSERT_OK_PTR(skel2, "unused_progs_skel");84 test_subprogs_unused__destroy(skel2);85 86cleanup:87 test_subprogs__destroy(skel);88}89 90void test_subprogs(void)91{92 if (test__start_subtest("subprogs_alone"))93 test_subprogs_alone();94 if (test__start_subtest("subprogs_and_jit_harden"))95 test_subprogs_with_jit_harden_toggling();96}97