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| author | Chris Lattner <sabre@nondot.org> | 2005-01-23 06:02:40 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2005-01-23 06:02:40 +0000 |
| commit | 6c43f5e5fec87871b978fdd1270feba46731732d (patch) | |
| tree | fee7f16c0d8054bdb138dfca82e07af1faf84f75 /llvm/lib/Support/FileUtilities.cpp | |
| parent | 4add7e356f3381fdfa62ff151af4de3054f8b84e (diff) | |
| download | bcm5719-llvm-6c43f5e5fec87871b978fdd1270feba46731732d.tar.gz bcm5719-llvm-6c43f5e5fec87871b978fdd1270feba46731732d.zip | |
Fix crash comparing empty file against nonempty file.
llvm-svn: 19782
Diffstat (limited to 'llvm/lib/Support/FileUtilities.cpp')
| -rw-r--r-- | llvm/lib/Support/FileUtilities.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/Support/FileUtilities.cpp b/llvm/lib/Support/FileUtilities.cpp index 7ae476b5975..99db439d327 100644 --- a/llvm/lib/Support/FileUtilities.cpp +++ b/llvm/lib/Support/FileUtilities.cpp @@ -93,7 +93,8 @@ static bool CompareNumbers(char *&F1P, char *&F2P, char *F1End, char *F2End, // with a number. Because of this, if needed, we pad the file so that it starts // and ends with a null character. static void PadFileIfNeeded(char *&FileStart, char *&FileEnd, char *&FP) { - if (isNumberChar(FileStart[0]) || isNumberChar(FileEnd[-1])) { + if (FileStart-FileEnd < 2 || + isNumberChar(FileStart[0]) || isNumberChar(FileEnd[-1])) { unsigned FileLen = FileEnd-FileStart; char *NewFile = new char[FileLen+2]; NewFile[0] = 0; // Add null padding |
