contrib/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_linux.cc

   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 <linux/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 #define time_t __kernel_time_t
  42 // This header seems to contain the definitions of _kernel_ stat* structs.
  43 #include <asm/stat.h>
  44 #undef ino_t
  45 #undef mode_t
  46 #undef nlink_t
  47 #undef uid_t
  48 #undef gid_t
  49 #undef off_t
  50 #endif
  51
  52 #include <linux/aio_abi.h>
  53
  54 #if !SANITIZER_ANDROID
  55 #include <sys/statfs.h>
  56 #include <linux/perf_event.h>
  57 #endif
  58
  59 using namespace __sanitizer;
  60
  61 namespace __sanitizer {
  62 #if !SANITIZER_ANDROID
  63   unsigned struct_statfs64_sz = sizeof(struct statfs64);
  64 #endif
  65 }  // namespace __sanitizer
  66
  67 #if !defined(__powerpc64__) && !defined(__x86_64__) && !defined(__aarch64__)\
  68                             && !defined(__mips__) && !defined(__s390__)\
  69                             && !defined(__sparc__)
  70 COMPILER_CHECK(struct___old_kernel_stat_sz == sizeof(struct __old_kernel_stat));
  71 #endif
  72
  73 COMPILER_CHECK(struct_kernel_stat_sz == sizeof(struct stat));
  74
  75 #if defined(__i386__)
  76 COMPILER_CHECK(struct_kernel_stat64_sz == sizeof(struct stat64));
  77 #endif
  78
  79 CHECK_TYPE_SIZE(io_event);
  80 CHECK_SIZE_AND_OFFSET(io_event, data);
  81 CHECK_SIZE_AND_OFFSET(io_event, obj);
  82 CHECK_SIZE_AND_OFFSET(io_event, res);
  83 CHECK_SIZE_AND_OFFSET(io_event, res2);
  84
  85 #if !SANITIZER_ANDROID
  86 COMPILER_CHECK(sizeof(struct __sanitizer_perf_event_attr) <=
  87                sizeof(struct perf_event_attr));
  88 CHECK_SIZE_AND_OFFSET(perf_event_attr, type);
  89 CHECK_SIZE_AND_OFFSET(perf_event_attr, size);
  90 #endif
  91
  92 COMPILER_CHECK(iocb_cmd_pread == IOCB_CMD_PREAD);
  93 COMPILER_CHECK(iocb_cmd_pwrite == IOCB_CMD_PWRITE);
  94 #if !SANITIZER_ANDROID
  95 COMPILER_CHECK(iocb_cmd_preadv == IOCB_CMD_PREADV);
  96 COMPILER_CHECK(iocb_cmd_pwritev == IOCB_CMD_PWRITEV);
  97 #endif
  98
  99 CHECK_TYPE_SIZE(iocb);
 100 CHECK_SIZE_AND_OFFSET(iocb, aio_data);
 101 // Skip aio_key, it's weird.
 102 CHECK_SIZE_AND_OFFSET(iocb, aio_lio_opcode);
 103 CHECK_SIZE_AND_OFFSET(iocb, aio_reqprio);
 104 CHECK_SIZE_AND_OFFSET(iocb, aio_fildes);
 105 CHECK_SIZE_AND_OFFSET(iocb, aio_buf);
 106 CHECK_SIZE_AND_OFFSET(iocb, aio_nbytes);
 107 CHECK_SIZE_AND_OFFSET(iocb, aio_offset);
 108
 109 #endif  // SANITIZER_LINUX