60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2026 Valve Corporation.
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* Author: Changwoo Min <changwoo@igalia.com>
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*/
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#include <test_progs.h>
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#include <sys/syscall.h>
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#include "test_ctx.skel.h"
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void test_exe_ctx(void)
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{
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LIBBPF_OPTS(bpf_test_run_opts, opts);
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cpu_set_t old_cpuset, target_cpuset;
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struct test_ctx *skel;
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int err, prog_fd;
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/* 1. Pin the current process to CPU 0. */
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if (sched_getaffinity(0, sizeof(old_cpuset), &old_cpuset) == 0) {
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CPU_ZERO(&target_cpuset);
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CPU_SET(0, &target_cpuset);
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ASSERT_OK(sched_setaffinity(0, sizeof(target_cpuset),
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&target_cpuset), "setaffinity");
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}
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skel = test_ctx__open_and_load();
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if (!ASSERT_OK_PTR(skel, "skel_load"))
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goto restore_affinity;
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err = test_ctx__attach(skel);
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if (!ASSERT_OK(err, "skel_attach"))
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goto cleanup;
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/* 2. When we run this, the kernel will execute the BPF prog on CPU 0. */
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prog_fd = bpf_program__fd(skel->progs.trigger_all_contexts);
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err = bpf_prog_test_run_opts(prog_fd, &opts);
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ASSERT_OK(err, "test_run_trigger");
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/* 3. Wait for the local CPU's softirq/tasklet to finish. */
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for (int i = 0; i < 1000; i++) {
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if (skel->bss->count_task > 0 &&
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skel->bss->count_hardirq > 0 &&
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skel->bss->count_softirq > 0)
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break;
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usleep(1000); /* Wait 1ms per iteration, up to 1 sec total */
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}
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/* On CPU 0, these should now all be non-zero. */
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ASSERT_GT(skel->bss->count_task, 0, "task_ok");
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ASSERT_GT(skel->bss->count_hardirq, 0, "hardirq_ok");
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ASSERT_GT(skel->bss->count_softirq, 0, "softirq_ok");
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cleanup:
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test_ctx__destroy(skel);
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restore_affinity:
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ASSERT_OK(sched_setaffinity(0, sizeof(old_cpuset), &old_cpuset),
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"restore_affinity");
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}
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