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__)
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
60namespace __sanitizer {
61#if !SANITIZER_ANDROID
62  unsigned struct_statfs64_sz = sizeof(struct statfs64);
63#endif
64}  // namespace __sanitizer
65
66#if !defined(__powerpc64__) && !defined(__x86_64__) && !defined(__aarch64__)\
67                            && !defined(__mips__) && !defined(__s390__)\
68                            && !defined(__sparc__) && !defined(__riscv)
69COMPILER_CHECK(struct___old_kernel_stat_sz == sizeof(struct __old_kernel_stat));
70#endif
71
72COMPILER_CHECK(struct_kernel_stat_sz == sizeof(struct stat));
73
74#if defined(__i386__)
75COMPILER_CHECK(struct_kernel_stat64_sz == sizeof(struct stat64));
76#endif
77
78CHECK_TYPE_SIZE(io_event);
79CHECK_SIZE_AND_OFFSET(io_event, data);
80CHECK_SIZE_AND_OFFSET(io_event, obj);
81CHECK_SIZE_AND_OFFSET(io_event, res);
82CHECK_SIZE_AND_OFFSET(io_event, res2);
83
84#if !SANITIZER_ANDROID
85COMPILER_CHECK(sizeof(struct __sanitizer_perf_event_attr) <=
86               sizeof(struct perf_event_attr));
87CHECK_SIZE_AND_OFFSET(perf_event_attr, type);
88CHECK_SIZE_AND_OFFSET(perf_event_attr, size);
89#endif
90
91COMPILER_CHECK(iocb_cmd_pread == IOCB_CMD_PREAD);
92COMPILER_CHECK(iocb_cmd_pwrite == IOCB_CMD_PWRITE);
93#if !SANITIZER_ANDROID
94COMPILER_CHECK(iocb_cmd_preadv == IOCB_CMD_PREADV);
95COMPILER_CHECK(iocb_cmd_pwritev == IOCB_CMD_PWRITEV);
96#endif
97
98CHECK_TYPE_SIZE(iocb);
99CHECK_SIZE_AND_OFFSET(iocb, aio_data);
100// Skip aio_key, it's weird.
101CHECK_SIZE_AND_OFFSET(iocb, aio_lio_opcode);
102CHECK_SIZE_AND_OFFSET(iocb, aio_reqprio);
103CHECK_SIZE_AND_OFFSET(iocb, aio_fildes);
104CHECK_SIZE_AND_OFFSET(iocb, aio_buf);
105CHECK_SIZE_AND_OFFSET(iocb, aio_nbytes);
106CHECK_SIZE_AND_OFFSET(iocb, aio_offset);
107
108#endif  // SANITIZER_LINUX
109