1 //===-- sanitizer_platform_limits_linux.cpp -------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file is a part of Sanitizer common code. 10 // 11 // Sizes and layouts of linux kernel data structures. 12 //===----------------------------------------------------------------------===// 13 14 // This is a separate compilation unit for linux headers that conflict with 15 // userspace headers. 16 // Most "normal" includes go in sanitizer_platform_limits_posix.cpp 17 18 #include "sanitizer_platform.h" 19 #if SANITIZER_LINUX 20 21 #include "sanitizer_internal_defs.h" 22 #include "sanitizer_platform_limits_posix.h" 23 24 // For offsetof -> __builtin_offsetof definition. 25 #include <stddef.h> 26 27 // With old kernels (and even new kernels on powerpc) asm/stat.h uses types that 28 // are not defined anywhere in userspace headers. Fake them. This seems to work 29 // fine with newer headers, too. Beware that with <sys/stat.h>, struct stat 30 // takes the form of struct stat64 on 32-bit platforms if _FILE_OFFSET_BITS=64. 31 // Also, for some platforms (e.g. mips) there are additional members in the 32 // <sys/stat.h> struct stat:s. 33 #include <linux/posix_types.h> 34 # if defined(__x86_64__) || defined(__mips__) || defined(__hexagon__) 35 # include <sys/stat.h> 36 # else 37 # define ino_t __kernel_ino_t 38 # define mode_t __kernel_mode_t 39 # define nlink_t __kernel_nlink_t 40 # define uid_t __kernel_uid_t 41 # define gid_t __kernel_gid_t 42 # define off_t __kernel_off_t 43 # define time_t __kernel_time_t 44 // This header seems to contain the definitions of _kernel_ stat* structs. 45 # include <asm/stat.h> 46 # undef ino_t 47 # undef mode_t 48 # undef nlink_t 49 # undef uid_t 50 # undef gid_t 51 # undef off_t 52 # endif 53 54 # include <linux/aio_abi.h> 55 56 # if !SANITIZER_ANDROID 57 # include <sys/statfs.h> 58 # include <linux/perf_event.h> 59 # endif 60 61 using namespace __sanitizer; 62 63 namespace __sanitizer { 64 #if !SANITIZER_ANDROID 65 unsigned struct_statfs64_sz = sizeof(struct statfs64); 66 #endif 67 } // namespace __sanitizer 68 69 # if !defined(__powerpc64__) && !defined(__x86_64__) && \ 70 !defined(__aarch64__) && !defined(__mips__) && !defined(__s390__) && \ 71 !defined(__sparc__) && !defined(__riscv) && !defined(__hexagon__) 72 COMPILER_CHECK(struct___old_kernel_stat_sz == sizeof(struct __old_kernel_stat)); 73 #endif 74 75 COMPILER_CHECK(struct_kernel_stat_sz == sizeof(struct stat)); 76 77 #if defined(__i386__) 78 COMPILER_CHECK(struct_kernel_stat64_sz == sizeof(struct stat64)); 79 #endif 80 81 CHECK_TYPE_SIZE(io_event); 82 CHECK_SIZE_AND_OFFSET(io_event, data); 83 CHECK_SIZE_AND_OFFSET(io_event, obj); 84 CHECK_SIZE_AND_OFFSET(io_event, res); 85 CHECK_SIZE_AND_OFFSET(io_event, res2); 86 87 #if !SANITIZER_ANDROID 88 COMPILER_CHECK(sizeof(struct __sanitizer_perf_event_attr) <= 89 sizeof(struct perf_event_attr)); 90 CHECK_SIZE_AND_OFFSET(perf_event_attr, type); 91 CHECK_SIZE_AND_OFFSET(perf_event_attr, size); 92 #endif 93 94 COMPILER_CHECK(iocb_cmd_pread == IOCB_CMD_PREAD); 95 COMPILER_CHECK(iocb_cmd_pwrite == IOCB_CMD_PWRITE); 96 #if !SANITIZER_ANDROID 97 COMPILER_CHECK(iocb_cmd_preadv == IOCB_CMD_PREADV); 98 COMPILER_CHECK(iocb_cmd_pwritev == IOCB_CMD_PWRITEV); 99 #endif 100 101 CHECK_TYPE_SIZE(iocb); 102 CHECK_SIZE_AND_OFFSET(iocb, aio_data); 103 // Skip aio_key, it's weird. 104 CHECK_SIZE_AND_OFFSET(iocb, aio_lio_opcode); 105 CHECK_SIZE_AND_OFFSET(iocb, aio_reqprio); 106 CHECK_SIZE_AND_OFFSET(iocb, aio_fildes); 107 CHECK_SIZE_AND_OFFSET(iocb, aio_buf); 108 CHECK_SIZE_AND_OFFSET(iocb, aio_nbytes); 109 CHECK_SIZE_AND_OFFSET(iocb, aio_offset); 110 111 #endif // SANITIZER_LINUX 112