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 58 using 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__) 64 COMPILER_CHECK(struct___old_kernel_stat_sz == sizeof(struct __old_kernel_stat)); 65 #endif 66 67 COMPILER_CHECK(struct_kernel_stat_sz == sizeof(struct stat)); 68 69 #if defined(__i386__) 70 COMPILER_CHECK(struct_kernel_stat64_sz == sizeof(struct stat64)); 71 #endif 72 73 CHECK_TYPE_SIZE(io_event); 74 CHECK_SIZE_AND_OFFSET(io_event, data); 75 CHECK_SIZE_AND_OFFSET(io_event, obj); 76 CHECK_SIZE_AND_OFFSET(io_event, res); 77 CHECK_SIZE_AND_OFFSET(io_event, res2); 78 79 #if !SANITIZER_ANDROID 80 COMPILER_CHECK(sizeof(struct __sanitizer_perf_event_attr) <= 81 sizeof(struct perf_event_attr)); 82 CHECK_SIZE_AND_OFFSET(perf_event_attr, type); 83 CHECK_SIZE_AND_OFFSET(perf_event_attr, size); 84 #endif 85 86 COMPILER_CHECK(iocb_cmd_pread == IOCB_CMD_PREAD); 87 COMPILER_CHECK(iocb_cmd_pwrite == IOCB_CMD_PWRITE); 88 #if !SANITIZER_ANDROID 89 COMPILER_CHECK(iocb_cmd_preadv == IOCB_CMD_PREADV); 90 COMPILER_CHECK(iocb_cmd_pwritev == IOCB_CMD_PWRITEV); 91 #endif 92 93 CHECK_TYPE_SIZE(iocb); 94 CHECK_SIZE_AND_OFFSET(iocb, aio_data); 95 // Skip aio_key, it's weird. 96 CHECK_SIZE_AND_OFFSET(iocb, aio_lio_opcode); 97 CHECK_SIZE_AND_OFFSET(iocb, aio_reqprio); 98 CHECK_SIZE_AND_OFFSET(iocb, aio_fildes); 99 CHECK_SIZE_AND_OFFSET(iocb, aio_buf); 100 CHECK_SIZE_AND_OFFSET(iocb, aio_nbytes); 101 CHECK_SIZE_AND_OFFSET(iocb, aio_offset); 102 103 #endif // SANITIZER_LINUX 104