c6a6547798
For Windows, the compiler-rt profile library contains a polyfill reimplementation of the mmap family of functions. Previously, the runtime library exposed those symbols like, "mmap", in the user symbol namespace. This could cause misdetections by configure scripts that check for the "mmap" function just by linking, without including headers. Add a prefix on the symbols, and make an undeclared function static. This fixes such an issue reported at https://github.com/mstorsjo/llvm-mingw/issues/390.
83 lines
2.1 KiB
C
83 lines
2.1 KiB
C
/*===- WindowsMMap.h - Support library for PGO instrumentation ------------===*\
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|*
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|* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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|* See https://llvm.org/LICENSE.txt for license information.
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|* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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|*
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\*===----------------------------------------------------------------------===*/
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#ifndef PROFILE_INSTRPROFILING_WINDOWS_MMAP_H
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#define PROFILE_INSTRPROFILING_WINDOWS_MMAP_H
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#if defined(_WIN32)
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#include <basetsd.h>
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#include <io.h>
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#include <sys/types.h>
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/*
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* mmap() flags
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*/
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#define PROT_READ 0x1
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#define PROT_WRITE 0x2
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#define PROT_EXEC 0x0
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#define MAP_FILE 0x00
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#define MAP_SHARED 0x01
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#define MAP_PRIVATE 0x02
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#define MAP_ANONYMOUS 0x20
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#define MAP_ANON MAP_ANONYMOUS
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#define MAP_FAILED ((void *) -1)
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/*
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* msync() flags
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*/
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#define MS_ASYNC 0x0001 /* return immediately */
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#define MS_INVALIDATE 0x0002 /* invalidate all cached data */
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#define MS_SYNC 0x0010 /* msync synchronously */
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/*
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* madvise() flags
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*/
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#define MADV_NORMAL 0 /* no special treatment */
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#define MADV_WILLNEED 3 /* expect access in the near future */
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#define MADV_DONTNEED 4 /* do not expect access in the near future */
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/*
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* flock() operations
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*/
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#define LOCK_SH 1 /* shared lock */
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#define LOCK_EX 2 /* exclusive lock */
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#define LOCK_NB 4 /* don't block when locking */
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#define LOCK_UN 8 /* unlock */
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#ifdef __USE_FILE_OFFSET64
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# define DWORD_HI(x) (x >> 32)
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# define DWORD_LO(x) ((x) & 0xffffffff)
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#else
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# define DWORD_HI(x) (0)
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# define DWORD_LO(x) (x)
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#endif
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#define mmap __llvm_profile_mmap
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#define munmap __llvm_profile_munmap
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#define msync __llvm_profile_msync
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#define madvise __llvm_profile_madvise
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#define flock __llvm_profile_flock
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void *mmap(void *start, size_t length, int prot, int flags, int fd,
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off_t offset);
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void munmap(void *addr, size_t length);
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int msync(void *addr, size_t length, int flags);
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int madvise(void *addr, size_t length, int advice);
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int flock(int fd, int operation);
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#endif /* _WIN32 */
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#endif /* PROFILE_INSTRPROFILING_WINDOWS_MMAP_H */
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