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| author | Pete Cooper <peter_cooper@apple.com> | 2016-03-22 22:51:03 +0000 |
|---|---|---|
| committer | Pete Cooper <peter_cooper@apple.com> | 2016-03-22 22:51:03 +0000 |
| commit | 8e1b9a17a692d428eeb16c0189ccbbaa741b366d (patch) | |
| tree | 4b2734e00834943e30876d304e9426ec15e3f076 /lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp | |
| parent | cd46960e6b93f07995e378534690c8ce3245fd53 (diff) | |
| download | bcm5719-llvm-8e1b9a17a692d428eeb16c0189ccbbaa741b366d.tar.gz bcm5719-llvm-8e1b9a17a692d428eeb16c0189ccbbaa741b366d.zip | |
Don't memcpy from a null source. Found by UBSan
llvm-svn: 264114
Diffstat (limited to 'lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp')
| -rw-r--r-- | lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp b/lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp index 34c48a500b9..03e081ababb 100644 --- a/lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp +++ b/lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp @@ -1066,6 +1066,8 @@ void MachOFileLayout::appendSymbols(const std::vector<Symbol> &symbols, } void MachOFileLayout::writeFunctionStartsInfo() { + if (!_functionStartsSize) + return; memcpy(&_buffer[_startOfFunctionStarts], _file.functionStarts.data(), _functionStartsSize); } |
