set_global_vars.c

  1// SPDX-License-Identifier: GPL-2.0
  2/* Copyright (c) 2025 Meta Platforms, Inc. and affiliates. */
  3#include "bpf_experimental.h"
  4#include <bpf/bpf_helpers.h>
  5#include "bpf_misc.h"
  6#include <stdbool.h>
  7
  8char _license[] SEC("license") = "GPL";
  9
 10typedef __s32 s32;
 11typedef s32 i32;
 12typedef __u8 u8;
 13
 14enum Enum { EA1 = 0, EA2 = 11, EA3 = 10 };
 15enum Enumu64 {EB1 = 0llu, EB2 = 12llu };
 16enum Enums64 { EC1 = 0ll, EC2 = 13ll };
 17
 18const volatile __s64 var_s64 = -1;
 19const volatile __u64 var_u64 = 0;
 20const volatile i32 var_s32 = -1;
 21const volatile __u32 var_u32 = 0;
 22const volatile __s16 var_s16 = -1;
 23const volatile __u16 var_u16 = 0;
 24const volatile __s8 var_s8 = -1;
 25const volatile u8 var_u8 = 0;
 26const volatile enum Enum var_ea = EA1;
 27const volatile enum Enumu64 var_eb = EB1;
 28const volatile enum Enums64 var_ec = EC1;
 29const volatile bool var_b = false;
 30const volatile i32 arr[32];
 31const volatile enum Enum enum_arr[32];
 32const volatile i32 three_d[47][19][17];
 33const volatile i32 *ptr_arr[32];
 34
 35struct Struct {
 36	int:16;
 37	__u16 filler;
 38	struct {
 39		const __u16 filler2;
 40	};
 41	struct Struct2 {
 42		__u16 filler;
 43		volatile struct {
 44			const int:1;
 45			union {
 46				const volatile u8 var_u8[3];
 47				const volatile __s16 filler3;
 48				const int:1;
 49				s32 mat[7][5];
 50			} u;
 51		};
 52	} struct2[2][4];
 53};
 54
 55const volatile __u32 stru = 0; /* same prefix as below */
 56const volatile struct Struct struct1[3];
 57const volatile struct Struct struct11[11][7];
 58
 59struct Struct3 {
 60	struct {
 61		u8 var_u8_l;
 62	};
 63	struct {
 64		struct {
 65			u8 var_u8_h;
 66		};
 67	};
 68};
 69
 70typedef struct Struct3 Struct3_t;
 71
 72union Union {
 73	__u16 var_u16;
 74	Struct3_t struct3;
 75};
 76
 77const volatile union Union union1 = {.var_u16 = -1};
 78
 79SEC("socket")
 80int test_set_globals(void *ctx)
 81{
 82	volatile __s8 a;
 83
 84	a = var_s64;
 85	a = var_u64;
 86	a = var_s32;
 87	a = var_u32;
 88	a = var_s16;
 89	a = var_u16;
 90	a = var_s8;
 91	a = var_u8;
 92	a = var_ea;
 93	a = var_eb;
 94	a = var_ec;
 95	a = var_b;
 96	a = struct1[2].struct2[1][2].u.var_u8[2];
 97	a = union1.var_u16;
 98	a = arr[3];
 99	a = arr[EA2];
100	a = enum_arr[EC2];
101	a = three_d[31][7][EA2];
102	a = struct1[2].struct2[1][2].u.mat[5][3];
103	a = struct11[7][5].struct2[0][1].u.mat[3][0];
104
105	return a;
106}