65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2020 Facebook */
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#include <test_progs.h>
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struct callback_head {
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struct callback_head *next;
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void (*func)(struct callback_head *head);
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};
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/* ___shuffled flavor is just an illusion for BPF code, it doesn't really
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* exist and user-space needs to provide data in the memory layout that
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* matches callback_head. We just defined ___shuffled flavor to make it easier
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* to work with the skeleton
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*/
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struct callback_head___shuffled {
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struct callback_head___shuffled *next;
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void (*func)(struct callback_head *head);
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};
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#include "test_core_read_macros.skel.h"
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void test_core_read_macros(void)
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{
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int duration = 0, err;
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struct test_core_read_macros* skel;
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struct test_core_read_macros__bss *bss;
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struct callback_head u_probe_in;
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struct callback_head___shuffled u_core_in;
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skel = test_core_read_macros__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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bss = skel->bss;
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bss->my_pid = getpid();
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/* next pointers have to be set from the kernel side */
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bss->k_probe_in.func = (void *)(long)0x1234;
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bss->k_core_in.func = (void *)(long)0xabcd;
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u_probe_in.next = &u_probe_in;
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u_probe_in.func = (void *)(long)0x5678;
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bss->u_probe_in = &u_probe_in;
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u_core_in.next = &u_core_in;
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u_core_in.func = (void *)(long)0xdbca;
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bss->u_core_in = &u_core_in;
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err = test_core_read_macros__attach(skel);
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if (CHECK(err, "skel_attach", "skeleton attach failed: %d\n", err))
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goto cleanup;
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/* trigger tracepoint */
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usleep(1);
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ASSERT_EQ(bss->k_probe_out, 0x1234, "k_probe_out");
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ASSERT_EQ(bss->k_core_out, 0xabcd, "k_core_out");
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ASSERT_EQ(bss->u_probe_out, 0x5678, "u_probe_out");
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ASSERT_EQ(bss->u_core_out, 0xdbca, "u_core_out");
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cleanup:
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test_core_read_macros__destroy(skel);
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}
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