1//===-- sanitizer_platform_limits_linux.cc --------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file is a part of Sanitizer common code.
11//
12// Sizes and layouts of linux kernel data structures.
13//===----------------------------------------------------------------------===//
14
15// This is a separate compilation unit for linux headers that conflict with
16// userspace headers.
17// Most "normal" includes go in sanitizer_platform_limits_posix.cc
18
19#include "sanitizer_platform.h"
20#if SANITIZER_LINUX
21
22#include "sanitizer_internal_defs.h"
23#include "sanitizer_platform_limits_posix.h"
24
25// For offsetof -> __builtin_offsetof definition.
26#include <stddef.h>
27
28// With old kernels (and even new kernels on powerpc) asm/stat.h uses types that
29// are not defined anywhere in userspace headers. Fake them. This seems to work
30// fine with newer headers, too.
31#include <asm/posix_types.h>
32#if defined(__x86_64__) ||  defined(__mips__)
33#include <sys/stat.h>
34#else
35#define ino_t __kernel_ino_t
36#define mode_t __kernel_mode_t
37#define nlink_t __kernel_nlink_t
38#define uid_t __kernel_uid_t
39#define gid_t __kernel_gid_t
40#define off_t __kernel_off_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
58namespace __sanitizer {
59#if !SANITIZER_ANDROID
60  unsigned struct_statfs64_sz = sizeof(struct statfs64);
61#endif
62}  // namespace __sanitizer
63
64#if !defined(__powerpc64__) && !defined(__x86_64__) && !defined(__aarch64__)\
65                            && !defined(__mips__)
66COMPILER_CHECK(struct___old_kernel_stat_sz == sizeof(struct __old_kernel_stat));
67#endif
68
69COMPILER_CHECK(struct_kernel_stat_sz == sizeof(struct stat));
70
71#if defined(__i386__)
72COMPILER_CHECK(struct_kernel_stat64_sz == sizeof(struct stat64));
73#endif
74
75CHECK_TYPE_SIZE(io_event);
76CHECK_SIZE_AND_OFFSET(io_event, data);
77CHECK_SIZE_AND_OFFSET(io_event, obj);
78CHECK_SIZE_AND_OFFSET(io_event, res);
79CHECK_SIZE_AND_OFFSET(io_event, res2);
80
81#if !SANITIZER_ANDROID
82COMPILER_CHECK(sizeof(struct __sanitizer_perf_event_attr) <=
83               sizeof(struct perf_event_attr));
84CHECK_SIZE_AND_OFFSET(perf_event_attr, type);
85CHECK_SIZE_AND_OFFSET(perf_event_attr, size);
86#endif
87
88COMPILER_CHECK(iocb_cmd_pread == IOCB_CMD_PREAD);
89COMPILER_CHECK(iocb_cmd_pwrite == IOCB_CMD_PWRITE);
90#if !SANITIZER_ANDROID
91COMPILER_CHECK(iocb_cmd_preadv == IOCB_CMD_PREADV);
92COMPILER_CHECK(iocb_cmd_pwritev == IOCB_CMD_PWRITEV);
93#endif
94
95CHECK_TYPE_SIZE(iocb);
96CHECK_SIZE_AND_OFFSET(iocb, aio_data);
97// Skip aio_key, it's weird.
98CHECK_SIZE_AND_OFFSET(iocb, aio_lio_opcode);
99CHECK_SIZE_AND_OFFSET(iocb, aio_reqprio);
100CHECK_SIZE_AND_OFFSET(iocb, aio_fildes);
101CHECK_SIZE_AND_OFFSET(iocb, aio_buf);
102CHECK_SIZE_AND_OFFSET(iocb, aio_nbytes);
103CHECK_SIZE_AND_OFFSET(iocb, aio_offset);
104
105#endif  // SANITIZER_LINUX
106