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. 30#include <linux/posix_types.h> 31# if defined(__x86_64__) || defined(__mips__) || defined(__hexagon__) 32# include <sys/stat.h> 33# else 34# define ino_t __kernel_ino_t 35# define mode_t __kernel_mode_t 36# define nlink_t __kernel_nlink_t 37# define uid_t __kernel_uid_t 38# define gid_t __kernel_gid_t 39# define off_t __kernel_off_t 40# define time_t __kernel_time_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 58using namespace __sanitizer; 59 60# if !defined(__powerpc64__) && !defined(__x86_64__) && \ 61 !defined(__aarch64__) && !defined(__mips__) && !defined(__s390__) && \ 62 !defined(__sparc__) && !defined(__riscv) && !defined(__hexagon__) && \ 63 !defined(__loongarch__) 64COMPILER_CHECK(struct___old_kernel_stat_sz == sizeof(struct __old_kernel_stat)); 65#endif 66 67COMPILER_CHECK(struct_kernel_stat_sz == sizeof(struct stat)); 68 69#if defined(__i386__) 70COMPILER_CHECK(struct_kernel_stat64_sz == sizeof(struct stat64)); 71#endif 72 73CHECK_TYPE_SIZE(io_event); 74CHECK_SIZE_AND_OFFSET(io_event, data); 75CHECK_SIZE_AND_OFFSET(io_event, obj); 76CHECK_SIZE_AND_OFFSET(io_event, res); 77CHECK_SIZE_AND_OFFSET(io_event, res2); 78 79#if !SANITIZER_ANDROID 80COMPILER_CHECK(sizeof(struct __sanitizer_perf_event_attr) <= 81 sizeof(struct perf_event_attr)); 82CHECK_SIZE_AND_OFFSET(perf_event_attr, type); 83CHECK_SIZE_AND_OFFSET(perf_event_attr, size); 84#endif 85 86COMPILER_CHECK(iocb_cmd_pread == IOCB_CMD_PREAD); 87COMPILER_CHECK(iocb_cmd_pwrite == IOCB_CMD_PWRITE); 88#if !SANITIZER_ANDROID 89COMPILER_CHECK(iocb_cmd_preadv == IOCB_CMD_PREADV); 90COMPILER_CHECK(iocb_cmd_pwritev == IOCB_CMD_PWRITEV); 91#endif 92 93CHECK_TYPE_SIZE(iocb); 94CHECK_SIZE_AND_OFFSET(iocb, aio_data); 95// Skip aio_key, it's weird. 96CHECK_SIZE_AND_OFFSET(iocb, aio_lio_opcode); 97CHECK_SIZE_AND_OFFSET(iocb, aio_reqprio); 98CHECK_SIZE_AND_OFFSET(iocb, aio_fildes); 99CHECK_SIZE_AND_OFFSET(iocb, aio_buf); 100CHECK_SIZE_AND_OFFSET(iocb, aio_nbytes); 101CHECK_SIZE_AND_OFFSET(iocb, aio_offset); 102 103#endif // SANITIZER_LINUX 104