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  
 58  namespace __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__)
 66  COMPILER_CHECK(struct___old_kernel_stat_sz == sizeof(struct __old_kernel_stat));
 67  #endif
 68  
 69  COMPILER_CHECK(struct_kernel_stat_sz == sizeof(struct stat));
 70  
 71  #if defined(__i386__)
 72  COMPILER_CHECK(struct_kernel_stat64_sz == sizeof(struct stat64));
 73  #endif
 74  
 75  CHECK_TYPE_SIZE(io_event);
 76  CHECK_SIZE_AND_OFFSET(io_event, data);
 77  CHECK_SIZE_AND_OFFSET(io_event, obj);
 78  CHECK_SIZE_AND_OFFSET(io_event, res);
 79  CHECK_SIZE_AND_OFFSET(io_event, res2);
 80  
 81  #if !SANITIZER_ANDROID
 82  COMPILER_CHECK(sizeof(struct __sanitizer_perf_event_attr) <=
 83                 sizeof(struct perf_event_attr));
 84  CHECK_SIZE_AND_OFFSET(perf_event_attr, type);
 85  CHECK_SIZE_AND_OFFSET(perf_event_attr, size);
 86  #endif
 87  
 88  COMPILER_CHECK(iocb_cmd_pread == IOCB_CMD_PREAD);
 89  COMPILER_CHECK(iocb_cmd_pwrite == IOCB_CMD_PWRITE);
 90  #if !SANITIZER_ANDROID
 91  COMPILER_CHECK(iocb_cmd_preadv == IOCB_CMD_PREADV);
 92  COMPILER_CHECK(iocb_cmd_pwritev == IOCB_CMD_PWRITEV);
 93  #endif
 94  
 95  CHECK_TYPE_SIZE(iocb);
 96  CHECK_SIZE_AND_OFFSET(iocb, aio_data);
 97  // Skip aio_key, it's weird.
 98  CHECK_SIZE_AND_OFFSET(iocb, aio_lio_opcode);
 99  CHECK_SIZE_AND_OFFSET(iocb, aio_reqprio);
100  CHECK_SIZE_AND_OFFSET(iocb, aio_fildes);
101  CHECK_SIZE_AND_OFFSET(iocb, aio_buf);
102  CHECK_SIZE_AND_OFFSET(iocb, aio_nbytes);
103  CHECK_SIZE_AND_OFFSET(iocb, aio_offset);
104  
105  #endif  // SANITIZER_LINUX