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[Support] Don't check MAP_ANONYMOUS, just use MAP_ANON

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Though being marked "deprecated" by the Linux man-pages project
(MAP_ANON is a synonym of MAP_ANONYMOUS), it is the mostly widely
available macro - many systems that don't provide MAP_ANONYMOUS have
MAP_ANON. MAP_ANON is also used here and there in compiler-rt.

llvm-svn: 359758
This commit is contained in:
Fangrui Song 2019-05-02 05:58:09 +00:00
parent e079e36506
commit 7c3c4b0149
1 changed files with 1 additions and 8 deletions
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9
lib/Support/Unix/Memory.inc
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@ -93,14 +93,7 @@ Memory::allocateMappedMemory(size_t NumBytes,
int fd = -1;
int MMFlags = MAP_PRIVATE |
#ifdef MAP_ANONYMOUS
MAP_ANONYMOUS
#else
MAP_ANON
#endif
; // Ends statement above
int MMFlags = MAP_PRIVATE | MAP_ANON;
int Protect = getPosixProtectionFlags(PFlags);
#if defined(__NetBSD__) && defined(PROT_MPROTECT)