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