1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (c) 2021 Facebook */ 3 4 #include <test_progs.h> 5 #include <sys/syscall.h> 6 #include "linked_funcs.skel.h" 7 8 void test_linked_funcs(void) 9 { 10 int err; 11 struct linked_funcs *skel; 12 13 skel = linked_funcs__open(); 14 if (!ASSERT_OK_PTR(skel, "skel_open")) 15 return; 16 17 /* handler1 and handler2 are marked as SEC("?raw_tp/sys_enter") and 18 * are set to not autoload by default 19 */ 20 bpf_program__set_autoload(skel->progs.handler1, true); 21 bpf_program__set_autoload(skel->progs.handler2, true); 22 23 skel->rodata->my_tid = syscall(SYS_gettid); 24 skel->bss->syscall_id = SYS_getpgid; 25 26 err = linked_funcs__load(skel); 27 if (!ASSERT_OK(err, "skel_load")) 28 goto cleanup; 29 30 err = linked_funcs__attach(skel); 31 if (!ASSERT_OK(err, "skel_attach")) 32 goto cleanup; 33 34 /* trigger */ 35 syscall(SYS_getpgid); 36 37 ASSERT_EQ(skel->bss->output_val1, 2000 + 2000, "output_val1"); 38 ASSERT_EQ(skel->bss->output_ctx1, SYS_getpgid, "output_ctx1"); 39 ASSERT_EQ(skel->bss->output_weak1, 42, "output_weak1"); 40 41 ASSERT_EQ(skel->bss->output_val2, 2 * 1000 + 2 * (2 * 1000), "output_val2"); 42 ASSERT_EQ(skel->bss->output_ctx2, SYS_getpgid, "output_ctx2"); 43 /* output_weak2 should never be updated */ 44 ASSERT_EQ(skel->bss->output_weak2, 0, "output_weak2"); 45 46 cleanup: 47 linked_funcs__destroy(skel); 48 } 49