1 //===-- sanitizer_platform_limits_linux.cpp -------------------------------===//
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
7 //===----------------------------------------------------------------------===//
9 // This file is a part of Sanitizer common code.
11 // Sizes and layouts of linux kernel data structures.
12 //===----------------------------------------------------------------------===//
14 // This is a separate compilation unit for linux headers that conflict with
16 // Most "normal" includes go in sanitizer_platform_limits_posix.cpp
18 #include "sanitizer_platform.h"
21 #include "sanitizer_internal_defs.h"
22 #include "sanitizer_platform_limits_posix.h"
24 // For offsetof -> __builtin_offsetof definition.
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>
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>
51 # include <linux/aio_abi.h>
53 # if !SANITIZER_ANDROID
54 # include <sys/statfs.h>
55 # include <linux/perf_event.h>
58 using namespace __sanitizer;
60 namespace __sanitizer {
61 #if !SANITIZER_ANDROID
62 unsigned struct_statfs64_sz = sizeof(struct statfs64);
64 } // namespace __sanitizer
66 # if !defined(__powerpc64__) && !defined(__x86_64__) && \
67 !defined(__aarch64__) && !defined(__mips__) && !defined(__s390__) && \
68 !defined(__sparc__) && !defined(__riscv) && !defined(__hexagon__)
69 COMPILER_CHECK(struct___old_kernel_stat_sz == sizeof(struct __old_kernel_stat));
72 COMPILER_CHECK(struct_kernel_stat_sz == sizeof(struct stat));
75 COMPILER_CHECK(struct_kernel_stat64_sz == sizeof(struct stat64));
78 CHECK_TYPE_SIZE(io_event);
79 CHECK_SIZE_AND_OFFSET(io_event, data);
80 CHECK_SIZE_AND_OFFSET(io_event, obj);
81 CHECK_SIZE_AND_OFFSET(io_event, res);
82 CHECK_SIZE_AND_OFFSET(io_event, res2);
84 #if !SANITIZER_ANDROID
85 COMPILER_CHECK(sizeof(struct __sanitizer_perf_event_attr) <=
86 sizeof(struct perf_event_attr));
87 CHECK_SIZE_AND_OFFSET(perf_event_attr, type);
88 CHECK_SIZE_AND_OFFSET(perf_event_attr, size);
91 COMPILER_CHECK(iocb_cmd_pread == IOCB_CMD_PREAD);
92 COMPILER_CHECK(iocb_cmd_pwrite == IOCB_CMD_PWRITE);
93 #if !SANITIZER_ANDROID
94 COMPILER_CHECK(iocb_cmd_preadv == IOCB_CMD_PREADV);
95 COMPILER_CHECK(iocb_cmd_pwritev == IOCB_CMD_PWRITEV);
98 CHECK_TYPE_SIZE(iocb);
99 CHECK_SIZE_AND_OFFSET(iocb, aio_data);
100 // Skip aio_key, it's weird.
101 CHECK_SIZE_AND_OFFSET(iocb, aio_lio_opcode);
102 CHECK_SIZE_AND_OFFSET(iocb, aio_reqprio);
103 CHECK_SIZE_AND_OFFSET(iocb, aio_fildes);
104 CHECK_SIZE_AND_OFFSET(iocb, aio_buf);
105 CHECK_SIZE_AND_OFFSET(iocb, aio_nbytes);
106 CHECK_SIZE_AND_OFFSET(iocb, aio_offset);
108 #endif // SANITIZER_LINUX