From 378cd84adfe988166c3a45005043b506e3485c34 Mon Sep 17 00:00:00 2001 From: NAKAMURA Takumi Date: Thu, 22 Aug 2013 10:23:52 +0000 Subject: [PATCH] MemoryBuffer.cpp: Consider if PageSize were not 4096 in shouldUseMmap(). Follow-up to r188903. The AllocationGranularity can be 65536 on Win32, even on Cygwin. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188998 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Support/MemoryBuffer.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/Support/MemoryBuffer.cpp b/lib/Support/MemoryBuffer.cpp index cab45c736b5..1c45c69ff3f 100644 --- a/lib/Support/MemoryBuffer.cpp +++ b/lib/Support/MemoryBuffer.cpp @@ -276,7 +276,7 @@ static bool shouldUseMmap(int FD, int PageSize) { // We don't use mmap for small files because this can severely fragment our // address space. - if (MapSize < 4096*4) + if (MapSize < 4 * 4096 || MapSize < (unsigned)PageSize) return false; if (!RequiresNullTerminator)