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selftests/bpf: add CO-RE relocs modifiers/typedef tests

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Add tests validating correct handling of various combinations of
typedefs and const/volatile/restrict modifiers.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Andrii Nakryiko
2019-08-07 14:39:58 -07:00
committed by Alexei Starovoitov
parent d9db355030
commit 9654e2ae90
6 changed files with 170 additions and 0 deletions
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3
tools/testing/selftests/bpf/progs/btf__core_reloc_mods.c Normal file
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@@ -0,0 +1,3 @@
#include "core_reloc_types.h"
void f(struct core_reloc_mods x) {}

3
tools/testing/selftests/bpf/progs/btf__core_reloc_mods___mod_swap.c Normal file
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@@ -0,0 +1,3 @@
#include "core_reloc_types.h"
void f(struct core_reloc_mods___mod_swap x) {}

3
tools/testing/selftests/bpf/progs/btf__core_reloc_mods___typedefs.c Normal file
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@@ -0,0 +1,3 @@
#include "core_reloc_types.h"
void f(struct core_reloc_mods___typedefs x) {}

72
tools/testing/selftests/bpf/progs/core_reloc_types.h
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@@ -454,3 +454,75 @@ struct core_reloc_primitives___err_non_ptr {
int d; /* int instead of ptr */
int (*f)(const char *);
};
/*
* MODS
*/
struct core_reloc_mods_output {
int a, b, c, d, e, f, g, h;
};
typedef const int int_t;
typedef const char *char_ptr_t;
typedef const int arr_t[7];
struct core_reloc_mods_substruct {
int x;
int y;
};
typedef struct {
int x;
int y;
} core_reloc_mods_substruct_t;
struct core_reloc_mods {
int a;
int_t b;
char *c;
char_ptr_t d;
int e[3];
arr_t f;
struct core_reloc_mods_substruct g;
core_reloc_mods_substruct_t h;
};
/* a/b, c/d, e/f, and g/h pairs are swapped */
struct core_reloc_mods___mod_swap {
int b;
int_t a;
char *d;
char_ptr_t c;
int f[3];
arr_t e;
struct {
int y;
int x;
} h;
core_reloc_mods_substruct_t g;
};
typedef int int1_t;
typedef int1_t int2_t;
typedef int2_t int3_t;
typedef int arr1_t[5];
typedef arr1_t arr2_t;
typedef arr2_t arr3_t;
typedef arr3_t arr4_t;
typedef const char * const volatile restrict fancy_char_ptr_t;
typedef core_reloc_mods_substruct_t core_reloc_mods_substruct_tt;
/* we need more typedefs */
struct core_reloc_mods___typedefs {
core_reloc_mods_substruct_tt g;
core_reloc_mods_substruct_tt h;
arr4_t f;
arr4_t e;
fancy_char_ptr_t d;
fancy_char_ptr_t c;
int3_t b;
int3_t a;
};

62
tools/testing/selftests/bpf/progs/test_core_reloc_mods.c Normal file
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@@ -0,0 +1,62 @@
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2019 Facebook
#include <linux/bpf.h>
#include <stdint.h>
#include "bpf_helpers.h"
char _license[] SEC("license") = "GPL";
static volatile struct data {
char in[256];
char out[256];
} data;
struct core_reloc_mods_output {
int a, b, c, d, e, f, g, h;
};
typedef const int int_t;
typedef const char *char_ptr_t;
typedef const int arr_t[7];
struct core_reloc_mods_substruct {
int x;
int y;
};
typedef struct {
int x;
int y;
} core_reloc_mods_substruct_t;
struct core_reloc_mods {
int a;
int_t b;
char *c;
char_ptr_t d;
int e[3];
arr_t f;
struct core_reloc_mods_substruct g;
core_reloc_mods_substruct_t h;
};
SEC("raw_tracepoint/sys_enter")
int test_core_mods(void *ctx)
{
struct core_reloc_mods *in = (void *)&data.in;
struct core_reloc_mods_output *out = (void *)&data.out;
if (BPF_CORE_READ(&out->a, &in->a) ||
BPF_CORE_READ(&out->b, &in->b) ||
BPF_CORE_READ(&out->c, &in->c) ||
BPF_CORE_READ(&out->d, &in->d) ||
BPF_CORE_READ(&out->e, &in->e[2]) ||
BPF_CORE_READ(&out->f, &in->f[1]) ||
BPF_CORE_READ(&out->g, &in->g.x) ||
BPF_CORE_READ(&out->h, &in->h.y))
return 1;
return 0;
}