1//===-- sanitizer_platform_limits_linux.cc --------------------------------===//
2//
3// This file is distributed under the University of Illinois Open Source
4// License. See LICENSE.TXT for details.
5//
6//===----------------------------------------------------------------------===//
7//
8// This file is a part of Sanitizer common code.
9//
10// Sizes and layouts of linux kernel data structures.
11//===----------------------------------------------------------------------===//
12
13// This is a separate compilation unit for linux headers that conflict with
14// userspace headers.
15// Most "normal" includes go in sanitizer_platform_limits_posix.cc
16
17#include "sanitizer_platform.h"
18#if SANITIZER_LINUX
19
20#include "sanitizer_internal_defs.h"
21#include "sanitizer_platform_limits_posix.h"
22
23// For offsetof -> __builtin_offsetof definition.
24#include <stddef.h>
25
26// With old kernels (and even new kernels on powerpc) asm/stat.h uses types that
27// are not defined anywhere in userspace headers. Fake them. This seems to work
28// fine with newer headers, too.  Beware that with <sys/stat.h>, struct stat
29// takes the form of struct stat64 on 32-bit platforms if _FILE_OFFSET_BITS=64.
30// Also, for some platforms (e.g. mips) there are additional members in the
31// <sys/stat.h> struct stat:s.
32#include <linux/posix_types.h>
33#if defined(__x86_64__)
34#include <sys/stat.h>
35#else
36#define ino_t __kernel_ino_t
37#define mode_t __kernel_mode_t
38#define nlink_t __kernel_nlink_t
39#define uid_t __kernel_uid_t
40#define gid_t __kernel_gid_t
41#define off_t __kernel_off_t
42#define time_t __kernel_time_t
43// This header seems to contain the definitions of _kernel_ stat* structs.
44#include <asm/stat.h>
45#undef ino_t
46#undef mode_t
47#undef nlink_t
48#undef uid_t
49#undef gid_t
50#undef off_t
51#endif
52
53#include <linux/aio_abi.h>
54
55#if !SANITIZER_ANDROID
56#include <sys/statfs.h>
57#include <linux/perf_event.h>
58#endif
59
60using namespace __sanitizer;
61
62namespace __sanitizer {
63#if !SANITIZER_ANDROID
64  unsigned struct_statfs64_sz = sizeof(struct statfs64);
65#endif
66}  // namespace __sanitizer
67
68#if !defined(__powerpc64__) && !defined(__x86_64__) && !defined(__aarch64__)\
69                            && !defined(__mips__) && !defined(__s390__)\
70                            && !defined(__sparc__)
71COMPILER_CHECK(struct___old_kernel_stat_sz == sizeof(struct __old_kernel_stat));
72#endif
73
74COMPILER_CHECK(struct_kernel_stat_sz == sizeof(struct stat));
75
76#if defined(__i386__)
77COMPILER_CHECK(struct_kernel_stat64_sz == sizeof(struct stat64));
78#endif
79
80CHECK_TYPE_SIZE(io_event);
81CHECK_SIZE_AND_OFFSET(io_event, data);
82CHECK_SIZE_AND_OFFSET(io_event, obj);
83CHECK_SIZE_AND_OFFSET(io_event, res);
84CHECK_SIZE_AND_OFFSET(io_event, res2);
85
86#if !SANITIZER_ANDROID
87COMPILER_CHECK(sizeof(struct __sanitizer_perf_event_attr) <=
88               sizeof(struct perf_event_attr));
89CHECK_SIZE_AND_OFFSET(perf_event_attr, type);
90CHECK_SIZE_AND_OFFSET(perf_event_attr, size);
91#endif
92
93COMPILER_CHECK(iocb_cmd_pread == IOCB_CMD_PREAD);
94COMPILER_CHECK(iocb_cmd_pwrite == IOCB_CMD_PWRITE);
95#if !SANITIZER_ANDROID
96COMPILER_CHECK(iocb_cmd_preadv == IOCB_CMD_PREADV);
97COMPILER_CHECK(iocb_cmd_pwritev == IOCB_CMD_PWRITEV);
98#endif
99
100CHECK_TYPE_SIZE(iocb);
101CHECK_SIZE_AND_OFFSET(iocb, aio_data);
102// Skip aio_key, it's weird.
103CHECK_SIZE_AND_OFFSET(iocb, aio_lio_opcode);
104CHECK_SIZE_AND_OFFSET(iocb, aio_reqprio);
105CHECK_SIZE_AND_OFFSET(iocb, aio_fildes);
106CHECK_SIZE_AND_OFFSET(iocb, aio_buf);
107CHECK_SIZE_AND_OFFSET(iocb, aio_nbytes);
108CHECK_SIZE_AND_OFFSET(iocb, aio_offset);
109
110#endif  // SANITIZER_LINUX
111