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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 | da7e70e058108fb444741a721ccfb38d40154e5b (patch) | |
| tree | fe582b029b55548e004e64e7a374dfab9fbac8c0 /lib/Support/FileUtilities.cpp | |
| parent | 9c32d3b798dc6caeebe6cea2effe80ca5e84e66e (diff) | |
| download | external_llvm-da7e70e058108fb444741a721ccfb38d40154e5b.zip external_llvm-da7e70e058108fb444741a721ccfb38d40154e5b.tar.gz external_llvm-da7e70e058108fb444741a721ccfb38d40154e5b.tar.bz2 | |
Fix crash comparing empty file against nonempty file.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19782 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Support/FileUtilities.cpp')
| -rw-r--r-- | lib/Support/FileUtilities.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Support/FileUtilities.cpp b/lib/Support/FileUtilities.cpp index 7ae476b..99db439 100644 --- a/lib/Support/FileUtilities.cpp +++ b/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 |