DWARF: Don't crash when looking up an invalid address.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139846 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/DebugInfo/DWARFContext.cpp b/lib/DebugInfo/DWARFContext.cpp
index 5fd4280..4fc0b30 100644
--- a/lib/DebugInfo/DWARFContext.cpp
+++ b/lib/DebugInfo/DWARFContext.cpp
@@ -147,13 +147,19 @@
uint32_t cuOffset = getDebugAranges()->offsetAtIndex(arangeIndex);
// Retrieve the compile unit.
DWARFCompileUnit *cu = getCompileUnitForOffset(cuOffset);
+ if (!cu)
+ return DILineInfo("<invalid>", 0, 0);
// Get the line table for this compile unit.
const DWARFDebugLine::LineTable *lineTable = getLineTableForCompileUnit(cu);
+ if (!lineTable)
+ return DILineInfo("<invalid>", 0, 0);
// Get the index of the row we're looking for in the line table.
uint64_t hiPC =
cu->getCompileUnitDIE()->getAttributeValueAsUnsigned(cu, DW_AT_high_pc,
-1ULL);
uint32_t rowIndex = lineTable->lookupAddress(address, hiPC);
+ if (rowIndex == -1U)
+ return DILineInfo("<invalid>", 0, 0);
// From here, contruct the DILineInfo.
const DWARFDebugLine::Row &row = lineTable->Rows[rowIndex];