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__) 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 60namespace __sanitizer { 61#if !SANITIZER_ANDROID 62 unsigned struct_statfs64_sz = sizeof(struct statfs64); 63#endif 64} // namespace __sanitizer 65 66#if !defined(__powerpc64__) && !defined(__x86_64__) && !defined(__aarch64__)\ 67 && !defined(__mips__) && !defined(__s390__)\ 68 && !defined(__sparc__) && !defined(__riscv) 69COMPILER_CHECK(struct___old_kernel_stat_sz == sizeof(struct __old_kernel_stat)); 70#endif 71 72COMPILER_CHECK(struct_kernel_stat_sz == sizeof(struct stat)); 73 74#if defined(__i386__) 75COMPILER_CHECK(struct_kernel_stat64_sz == sizeof(struct stat64)); 76#endif 77 78CHECK_TYPE_SIZE(io_event); 79CHECK_SIZE_AND_OFFSET(io_event, data); 80CHECK_SIZE_AND_OFFSET(io_event, obj); 81CHECK_SIZE_AND_OFFSET(io_event, res); 82CHECK_SIZE_AND_OFFSET(io_event, res2); 83 84#if !SANITIZER_ANDROID 85COMPILER_CHECK(sizeof(struct __sanitizer_perf_event_attr) <= 86 sizeof(struct perf_event_attr)); 87CHECK_SIZE_AND_OFFSET(perf_event_attr, type); 88CHECK_SIZE_AND_OFFSET(perf_event_attr, size); 89#endif 90 91COMPILER_CHECK(iocb_cmd_pread == IOCB_CMD_PREAD); 92COMPILER_CHECK(iocb_cmd_pwrite == IOCB_CMD_PWRITE); 93#if !SANITIZER_ANDROID 94COMPILER_CHECK(iocb_cmd_preadv == IOCB_CMD_PREADV); 95COMPILER_CHECK(iocb_cmd_pwritev == IOCB_CMD_PWRITEV); 96#endif 97 98CHECK_TYPE_SIZE(iocb); 99CHECK_SIZE_AND_OFFSET(iocb, aio_data); 100// Skip aio_key, it's weird. 101CHECK_SIZE_AND_OFFSET(iocb, aio_lio_opcode); 102CHECK_SIZE_AND_OFFSET(iocb, aio_reqprio); 103CHECK_SIZE_AND_OFFSET(iocb, aio_fildes); 104CHECK_SIZE_AND_OFFSET(iocb, aio_buf); 105CHECK_SIZE_AND_OFFSET(iocb, aio_nbytes); 106CHECK_SIZE_AND_OFFSET(iocb, aio_offset); 107 108#endif // SANITIZER_LINUX 109