Don't return an invalid line table if the DW_AT_stmt_list value is not in the .debug_...

llvm-svn: 302180

diff --git a/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp b/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
index 573d37d..179d6af 100644 (file)
--- a/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
+++ b/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
@@ -692,6 +692,10 @@ DWARFContext::getLineTableForUnit(DWARFUnit *U) {
   if (const DWARFLineTable *lt = Line->getLineTable(stmtOffset))
     return lt;
 
+  // Make sure the offset is good before we try to parse.
+  if (stmtOffset >= U->getLineSection().size())
+    return nullptr;  
+
   // We have to parse it first.
   DataExtractor lineData(U->getLineSection(), isLittleEndian(),
                          U->getAddressByteSize());