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mmap of a zero length file returns null on some platforms, so hack around it.
author
Brian Gaeke
<gaeke@uiuc.edu>
Fri, 23 Apr 2004 17:38:17 +0000
(17:38 +0000)
committer
Brian Gaeke
<gaeke@uiuc.edu>
Fri, 23 Apr 2004 17:38:17 +0000
(17:38 +0000)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13121
91177308
-0d34-0410-b5e6-
96231b3b80d8
utils/fpcmp/fpcmp.cpp
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diff --git
a/utils/fpcmp/fpcmp.cpp
b/utils/fpcmp/fpcmp.cpp
index 6f8298e5c78bebbae2329f737dc9ca5b84df5f1f..7e472d474f67fcdaf0daf0cd3e382caf067e6a3a 100644
(file)
--- 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) {