selftests/bpf: add CO-RE relocs ptr-as-array tests (d698f9db) · Commits · 戴 / test

tools/testing/selftests/bpf/prog_tests/core_reloc.c

+20 −0

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	@@ -129,6 +129,22 @@
	.output_len = sizeof(struct core_reloc_mods_output), \		.output_len = sizeof(struct core_reloc_mods_output), \
	}		}

			#define PTR_AS_ARR_CASE(name) { \
			.case_name = #name, \
			.bpf_obj_file = "test_core_reloc_ptr_as_arr.o", \
			.btf_src_file = "btf__core_reloc_" #name ".o", \
			.input = (const char *)&(struct core_reloc_##name []){ \
			{ .a = 1 }, \
			{ .a = 2 }, \
			{ .a = 3 }, \
			}, \
			.input_len = 3 * sizeof(struct core_reloc_##name), \
			.output = STRUCT_TO_CHAR_PTR(core_reloc_ptr_as_arr) { \
			.a = 3, \
			}, \
			.output_len = sizeof(struct core_reloc_ptr_as_arr), \
			}

	struct core_reloc_test_case {		struct core_reloc_test_case {
	const char *case_name;		const char *case_name;
	const char *bpf_obj_file;		const char *bpf_obj_file;
	@@ -200,6 +216,10 @@ static struct core_reloc_test_case test_cases[] = {
	MODS_CASE(mods),		MODS_CASE(mods),
	MODS_CASE(mods___mod_swap),		MODS_CASE(mods___mod_swap),
	MODS_CASE(mods___typedefs),		MODS_CASE(mods___typedefs),

			/* handling "ptr is an array" semantics */
			PTR_AS_ARR_CASE(ptr_as_arr),
			PTR_AS_ARR_CASE(ptr_as_arr___diff_sz),
	};		};

	struct data {		struct data {

0 → 100644

+3 −0

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			#include "core_reloc_types.h"

			void f(struct core_reloc_ptr_as_arr x) {}

0 → 100644

+3 −0

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			#include "core_reloc_types.h"

			void f(struct core_reloc_ptr_as_arr___diff_sz x) {}

+13 −0

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	@@ -526,3 +526,16 @@ struct core_reloc_mods___typedefs {
	int3_t b;		int3_t b;
	int3_t a;		int3_t a;
	};		};

			/*
			* PTR_AS_ARR
			*/
			struct core_reloc_ptr_as_arr {
			int a;
			};

			struct core_reloc_ptr_as_arr___diff_sz {
			int :32; /* padding */
			char __some_more_padding;
			int a;
			};

0 → 100644

+30 −0

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			// 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_ptr_as_arr {
			int a;
			};

			SEC("raw_tracepoint/sys_enter")
			int test_core_ptr_as_arr(void *ctx)
			{
			struct core_reloc_ptr_as_arr in = (void )&data.in;
			struct core_reloc_ptr_as_arr out = (void )&data.out;

			if (BPF_CORE_READ(&out->a, &in[2].a))
			return 1;

			return 0;
			}