0fd7562af1
Add a higher-level test (C BPF program) for the new functionality - variable access stack reads and writes. Signed-off-by: Andrei Matei <andreimatei1@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210207011027.676572-5-andreimatei1@gmail.com
36 lines
925 B
C
36 lines
925 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <test_progs.h>
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#include "test_stack_var_off.skel.h"
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/* Test read and writes to the stack performed with offsets that are not
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* statically known.
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*/
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void test_stack_var_off(void)
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{
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int duration = 0;
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struct test_stack_var_off *skel;
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skel = test_stack_var_off__open_and_load();
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if (CHECK(!skel, "skel_open", "failed to open skeleton\n"))
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return;
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/* Give pid to bpf prog so it doesn't trigger for anyone else. */
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skel->bss->test_pid = getpid();
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/* Initialize the probe's input. */
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skel->bss->input[0] = 2;
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skel->bss->input[1] = 42; /* This will be returned in probe_res. */
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if (!ASSERT_OK(test_stack_var_off__attach(skel), "skel_attach"))
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goto cleanup;
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/* Trigger probe. */
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usleep(1);
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if (CHECK(skel->bss->probe_res != 42, "check_probe_res",
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"wrong probe res: %d\n", skel->bss->probe_res))
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goto cleanup;
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cleanup:
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test_stack_var_off__destroy(skel);
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}
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