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Add a testcase that checks that deadlock avoidance is working as expected. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20260204055147.54960-3-alexei.starovoitov@gmail.com
34 lines
900 B
C
34 lines
900 B
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2026 Meta Platforms, Inc. and affiliates. */
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#include <test_progs.h>
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#include "timer_start_deadlock.skel.h"
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void test_timer_start_deadlock(void)
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{
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struct timer_start_deadlock *skel;
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int err, prog_fd;
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LIBBPF_OPTS(bpf_test_run_opts, opts);
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skel = timer_start_deadlock__open_and_load();
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if (!ASSERT_OK_PTR(skel, "skel_open_and_load"))
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return;
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err = timer_start_deadlock__attach(skel);
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if (!ASSERT_OK(err, "skel_attach"))
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goto cleanup;
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prog_fd = bpf_program__fd(skel->progs.start_timer);
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/*
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* Run the syscall program that attempts to deadlock.
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* If the kernel deadlocks, this call will never return.
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*/
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err = bpf_prog_test_run_opts(prog_fd, &opts);
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ASSERT_OK(err, "prog_test_run");
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ASSERT_EQ(opts.retval, 0, "prog_retval");
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ASSERT_EQ(skel->bss->tp_called, 1, "tp_called");
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cleanup:
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timer_start_deadlock__destroy(skel);
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}
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