9f943b2446
As mentioned in <http://gcc.gnu.org/ml/gcc/2018-03/msg00133.html> the bogus adjustment to 160 from 144 (which is reverted here), is a single-token commit in upstream r301307, an attempt to correct a failed build due to an upstream change to compile the runtime with D_FILE_OFFSET_BITS=64. The correct fix is here: just use the right include. Yes, user-struct-stat64-as-stat is actually 160 for MIPS o32 and I hear user-struct-stat is also 160 for n32. There are additional fields appended for user-struct-stat! I guess for MIPS it's as bad as it gets for mixing up kernel and user struct stat. The context of the patch doesn't show that in the #else there's the correct include, the one for <asm/stat.h> to get the kernel-struct-stat. If you can't compile it, IMHO the kernel headers are just too old; 3.2 is fine for example. * sanitizer_common/sanitizer_platform_limits_linux.cc: Do not take the shortcut to #include <sys/stat.h> for MIPS instead of the kernel <asm/stat.h>. Explain why sys/stat.h is misleading or wrong to get the kernel struct stat. * sanitizer_common/sanitizer_platform_limits_posix.h [__mips__]: Correct the value for 32-bit non-android struct_kernel_stat_sz. From-SVN: r259664
111 lines
3.4 KiB
C++
111 lines
3.4 KiB
C++
//===-- sanitizer_platform_limits_linux.cc --------------------------------===//
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of Sanitizer common code.
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//
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// Sizes and layouts of linux kernel data structures.
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//===----------------------------------------------------------------------===//
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// This is a separate compilation unit for linux headers that conflict with
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// userspace headers.
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// Most "normal" includes go in sanitizer_platform_limits_posix.cc
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#include "sanitizer_platform.h"
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#if SANITIZER_LINUX
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#include "sanitizer_internal_defs.h"
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#include "sanitizer_platform_limits_posix.h"
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// For offsetof -> __builtin_offsetof definition.
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#include <stddef.h>
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// With old kernels (and even new kernels on powerpc) asm/stat.h uses types that
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// are not defined anywhere in userspace headers. Fake them. This seems to work
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// fine with newer headers, too. Beware that with <sys/stat.h>, struct stat
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// takes the form of struct stat64 on 32-bit platforms if _FILE_OFFSET_BITS=64.
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// Also, for some platforms (e.g. mips) there are additional members in the
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// <sys/stat.h> struct stat:s.
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#include <linux/posix_types.h>
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#if defined(__x86_64__)
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#include <sys/stat.h>
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#else
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#define ino_t __kernel_ino_t
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#define mode_t __kernel_mode_t
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#define nlink_t __kernel_nlink_t
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#define uid_t __kernel_uid_t
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#define gid_t __kernel_gid_t
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#define off_t __kernel_off_t
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#define time_t __kernel_time_t
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// This header seems to contain the definitions of _kernel_ stat* structs.
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#include <asm/stat.h>
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#undef ino_t
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#undef mode_t
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#undef nlink_t
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#undef uid_t
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#undef gid_t
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#undef off_t
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#endif
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#include <linux/aio_abi.h>
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#if !SANITIZER_ANDROID
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#include <sys/statfs.h>
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#include <linux/perf_event.h>
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#endif
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using namespace __sanitizer;
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namespace __sanitizer {
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#if !SANITIZER_ANDROID
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unsigned struct_statfs64_sz = sizeof(struct statfs64);
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#endif
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} // namespace __sanitizer
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#if !defined(__powerpc64__) && !defined(__x86_64__) && !defined(__aarch64__)\
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&& !defined(__mips__) && !defined(__s390__)\
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&& !defined(__sparc__)
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COMPILER_CHECK(struct___old_kernel_stat_sz == sizeof(struct __old_kernel_stat));
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#endif
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COMPILER_CHECK(struct_kernel_stat_sz == sizeof(struct stat));
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#if defined(__i386__)
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COMPILER_CHECK(struct_kernel_stat64_sz == sizeof(struct stat64));
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#endif
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CHECK_TYPE_SIZE(io_event);
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CHECK_SIZE_AND_OFFSET(io_event, data);
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CHECK_SIZE_AND_OFFSET(io_event, obj);
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CHECK_SIZE_AND_OFFSET(io_event, res);
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CHECK_SIZE_AND_OFFSET(io_event, res2);
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#if !SANITIZER_ANDROID
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COMPILER_CHECK(sizeof(struct __sanitizer_perf_event_attr) <=
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sizeof(struct perf_event_attr));
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CHECK_SIZE_AND_OFFSET(perf_event_attr, type);
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CHECK_SIZE_AND_OFFSET(perf_event_attr, size);
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#endif
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COMPILER_CHECK(iocb_cmd_pread == IOCB_CMD_PREAD);
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COMPILER_CHECK(iocb_cmd_pwrite == IOCB_CMD_PWRITE);
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#if !SANITIZER_ANDROID
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COMPILER_CHECK(iocb_cmd_preadv == IOCB_CMD_PREADV);
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COMPILER_CHECK(iocb_cmd_pwritev == IOCB_CMD_PWRITEV);
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#endif
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CHECK_TYPE_SIZE(iocb);
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CHECK_SIZE_AND_OFFSET(iocb, aio_data);
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// Skip aio_key, it's weird.
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CHECK_SIZE_AND_OFFSET(iocb, aio_lio_opcode);
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CHECK_SIZE_AND_OFFSET(iocb, aio_reqprio);
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CHECK_SIZE_AND_OFFSET(iocb, aio_fildes);
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CHECK_SIZE_AND_OFFSET(iocb, aio_buf);
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CHECK_SIZE_AND_OFFSET(iocb, aio_nbytes);
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CHECK_SIZE_AND_OFFSET(iocb, aio_offset);
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#endif // SANITIZER_LINUX
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