From 6893eadc9524de6ade68d720701c238a5b1a8ebf Mon Sep 17 00:00:00 2001 From: Brian Gaeke Date: Fri, 23 Apr 2004 17:38:17 +0000 Subject: mmap of a zero length file returns null on some platforms, so hack around it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13121 91177308-0d34-0410-b5e6-96231b3b80d8 --- utils/fpcmp/fpcmp.cpp | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'utils') diff --git a/utils/fpcmp/fpcmp.cpp b/utils/fpcmp/fpcmp.cpp index 6f8298e5c7..7e472d474f 100644 --- a/utils/fpcmp/fpcmp.cpp +++ b/utils/fpcmp/fpcmp.cpp @@ -50,6 +50,12 @@ static void OpenFile(const std::string &Filename, unsigned &Len, char* &BufPtr){ std::cerr << "Error: cannot open file '" << Filename << "'\n"; exit(2); } + + // If mmap decided that the files were empty, it might have returned a + // null pointer. If so, make a new, fake pointer -- it shouldn't matter + // what it contains, because Len is 0, and it should never be read. + if (BufPtr == 0 && Len == 0) + BufPtr = new char[1]; } static bool isNumberChar(char C) { -- cgit v1.2.3