diff options
Diffstat (limited to 'llvm/lib/DebugInfo/DWARF/DWARFDebugLine.cpp')
| -rw-r--r-- | llvm/lib/DebugInfo/DWARF/DWARFDebugLine.cpp | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/llvm/lib/DebugInfo/DWARF/DWARFDebugLine.cpp b/llvm/lib/DebugInfo/DWARF/DWARFDebugLine.cpp index 93b60f1e504..8e7ce58957d 100644 --- a/llvm/lib/DebugInfo/DWARF/DWARFDebugLine.cpp +++ b/llvm/lib/DebugInfo/DWARF/DWARFDebugLine.cpp @@ -528,8 +528,23 @@ Error DWARFDebugLine::LineTable::parse( if (PrologueErr) return PrologueErr; - const uint64_t EndOffset = - DebugLineOffset + Prologue.TotalLength + Prologue.sizeofTotalLength(); + uint64_t ProgramLength = Prologue.TotalLength + Prologue.sizeofTotalLength(); + if (!DebugLineData.isValidOffsetForDataOfSize(DebugLineOffset, + ProgramLength)) { + assert(DebugLineData.size() > DebugLineOffset && + "prologue parsing should handle invalid offset"); + uint64_t BytesRemaining = DebugLineData.size() - DebugLineOffset; + RecoverableErrorCallback( + createStringError(errc::invalid_argument, + "line table program with offset 0x%8.8" PRIx64 + " has length 0x%8.8" PRIx64 " but only 0x%8.8" PRIx64 + " bytes are available", + DebugLineOffset, ProgramLength, BytesRemaining)); + // Continue by capping the length at the number of remaining bytes. + ProgramLength = BytesRemaining; + } + + const uint64_t EndOffset = DebugLineOffset + ProgramLength; // See if we should tell the data extractor the address size. if (DebugLineData.getAddressSize() == 0) |
