// SPDX-License-Identifier: GPL-2.0/* Copyright (c) 2023 Meta Platforms, Inc. and affiliates. */ #include <test_progs.h>#include "verifier_global_subprogs.skel.h"#include "freplace_dead_global_func.skel.h" void test_global_func_dead_code(void){	struct verifier_global_subprogs *tgt_skel = NULL;	struct freplace_dead_global_func *skel = NULL;	char log_buf[4096];	int err, tgt_fd; 	/* first, try to load target with good global subprog */	tgt_skel = verifier_global_subprogs__open();	if (!ASSERT_OK_PTR(tgt_skel, "tgt_skel_good_open"))		return; 	bpf_program__set_autoload(tgt_skel->progs.chained_global_func_calls_success, true); 	err = verifier_global_subprogs__load(tgt_skel);	if (!ASSERT_OK(err, "tgt_skel_good_load"))		goto out; 	tgt_fd = bpf_program__fd(tgt_skel->progs.chained_global_func_calls_success); 	/* Attach to good non-eliminated subprog */	skel = freplace_dead_global_func__open();	if (!ASSERT_OK_PTR(skel, "skel_good_open"))		goto out; 	err = bpf_program__set_attach_target(skel->progs.freplace_prog, tgt_fd, "global_good");	ASSERT_OK(err, "attach_target_good"); 	err = freplace_dead_global_func__load(skel);	if (!ASSERT_OK(err, "skel_good_load"))		goto out; 	freplace_dead_global_func__destroy(skel); 	/* Try attaching to dead code-eliminated subprog */	skel = freplace_dead_global_func__open();	if (!ASSERT_OK_PTR(skel, "skel_dead_open"))		goto out; 	bpf_program__set_log_buf(skel->progs.freplace_prog, log_buf, sizeof(log_buf));	err = bpf_program__set_attach_target(skel->progs.freplace_prog, tgt_fd, "global_dead");	ASSERT_OK(err, "attach_target_dead"); 	err = freplace_dead_global_func__load(skel);	if (!ASSERT_ERR(err, "skel_dead_load"))		goto out; 	ASSERT_HAS_SUBSTR(log_buf, "Subprog global_dead doesn't exist", "dead_subprog_missing_msg"); out:	verifier_global_subprogs__destroy(tgt_skel);	freplace_dead_global_func__destroy(skel);}