1//===-- sanitizer_platform_limits_linux.cpp -------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file is a part of Sanitizer common code.
10//
11// Sizes and layouts of linux kernel data structures.
12//===----------------------------------------------------------------------===//
13
14// This is a separate compilation unit for linux headers that conflict with
15// userspace headers.
16// Most "normal" includes go in sanitizer_platform_limits_posix.cpp
17
18#include "sanitizer_platform.h"
19#if SANITIZER_LINUX
20
21#include "sanitizer_internal_defs.h"
22#include "sanitizer_platform_limits_posix.h"
23
24// For offsetof -> __builtin_offsetof definition.
25#include <stddef.h>
26
27// With old kernels (and even new kernels on powerpc) asm/stat.h uses types that
28// are not defined anywhere in userspace headers. Fake them. This seems to work
29// fine with newer headers, too.
30#include <linux/posix_types.h>
31# if defined(__x86_64__) || defined(__mips__) || defined(__hexagon__)
32# include <sys/stat.h>
33# else
34# define ino_t __kernel_ino_t
35# define mode_t __kernel_mode_t
36# define nlink_t __kernel_nlink_t
37# define uid_t __kernel_uid_t
38# define gid_t __kernel_gid_t
39# define off_t __kernel_off_t
40# define time_t __kernel_time_t
41// This header seems to contain the definitions of _kernel_ stat* structs.
42# include <asm/stat.h>
43# undef ino_t
44# undef mode_t
45# undef nlink_t
46# undef uid_t
47# undef gid_t
48# undef off_t
49# endif
50
51# include <linux/aio_abi.h>
52
53# if !SANITIZER_ANDROID
54# include <sys/statfs.h>
55# include <linux/perf_event.h>
56# endif
57
58using namespace __sanitizer;
59
60# if !defined(__powerpc64__) && !defined(__x86_64__) && \
61 !defined(__aarch64__) && !defined(__mips__) && !defined(__s390__) && \
62 !defined(__sparc__) && !defined(__riscv) && !defined(__hexagon__) && \
63 !defined(__loongarch__)
64COMPILER_CHECK(struct___old_kernel_stat_sz == sizeof(struct __old_kernel_stat));
65#endif
66
67COMPILER_CHECK(struct_kernel_stat_sz == sizeof(struct stat));
68
69#if defined(__i386__)
70COMPILER_CHECK(struct_kernel_stat64_sz == sizeof(struct stat64));
71#endif
72
73CHECK_TYPE_SIZE(io_event);
74CHECK_SIZE_AND_OFFSET(io_event, data);
75CHECK_SIZE_AND_OFFSET(io_event, obj);
76CHECK_SIZE_AND_OFFSET(io_event, res);
77CHECK_SIZE_AND_OFFSET(io_event, res2);
78
79#if !SANITIZER_ANDROID
80COMPILER_CHECK(sizeof(struct __sanitizer_perf_event_attr) <=
81 sizeof(struct perf_event_attr));
82CHECK_SIZE_AND_OFFSET(perf_event_attr, type);
83CHECK_SIZE_AND_OFFSET(perf_event_attr, size);
84#endif
85
86COMPILER_CHECK(iocb_cmd_pread == IOCB_CMD_PREAD);
87COMPILER_CHECK(iocb_cmd_pwrite == IOCB_CMD_PWRITE);
88#if !SANITIZER_ANDROID
89COMPILER_CHECK(iocb_cmd_preadv == IOCB_CMD_PREADV);
90COMPILER_CHECK(iocb_cmd_pwritev == IOCB_CMD_PWRITEV);
91#endif
92
93CHECK_TYPE_SIZE(iocb);
94CHECK_SIZE_AND_OFFSET(iocb, aio_data);
95// Skip aio_key, it's weird.
96CHECK_SIZE_AND_OFFSET(iocb, aio_lio_opcode);
97CHECK_SIZE_AND_OFFSET(iocb, aio_reqprio);
98CHECK_SIZE_AND_OFFSET(iocb, aio_fildes);
99CHECK_SIZE_AND_OFFSET(iocb, aio_buf);
100CHECK_SIZE_AND_OFFSET(iocb, aio_nbytes);
101CHECK_SIZE_AND_OFFSET(iocb, aio_offset);
102
103#endif // SANITIZER_LINUX
104