libsanitizer/sanitizer_common/sanitizer_platform_limits_linux.cc

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