Don't return an invalid line table if the DW_AT_stmt_list value is no…

…t in the .debug_line section. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@302180 91177308-0d34-0410-b5e6-96231b3b80d8
nedm2 · May 4, 2017 · b1cbece · b1cbece
1 parent 984dc04
commit b1cbece
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/lib/DebugInfo/DWARF/DWARFContext.cpp b/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());