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256eab48e7
In preparation of skipping emitting static variables in BPF skeletons, switch all current selftests uses of static variables to pass data between BPF and user-space to use global variables. All non-read-only `static volatile` variables become just plain global variables by dropping `static volatile` part. Read-only `static volatile const` variables, though, still require `volatile` modifier, otherwise compiler will ignore whatever values are set from user-space. Few static linker tests are using name-conflicting static variables to validate that static linker still properly handles static variables and doesn't trip up on name conflicts. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210507054119.270888-4-andrii@kernel.org
35 lines
718 B
C
35 lines
718 B
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2019 Facebook */
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#include <test_progs.h>
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#include "test_static_linked.skel.h"
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void test_static_linked(void)
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{
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int err;
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struct test_static_linked* skel;
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skel = test_static_linked__open();
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if (!ASSERT_OK_PTR(skel, "skel_open"))
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return;
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skel->rodata->rovar1 = 1;
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skel->rodata->rovar2 = 4;
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err = test_static_linked__load(skel);
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if (!ASSERT_OK(err, "skel_load"))
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goto cleanup;
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err = test_static_linked__attach(skel);
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if (!ASSERT_OK(err, "skel_attach"))
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goto cleanup;
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/* trigger */
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usleep(1);
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ASSERT_EQ(skel->bss->var1, 1 * 2 + 2 + 3, "var1");
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ASSERT_EQ(skel->bss->var2, 4 * 3 + 5 + 6, "var2");
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cleanup:
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test_static_linked__destroy(skel);
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}
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