From f5b0accf43a4fa22fc6050daac59441e3c9288b0 Mon Sep 17 00:00:00 2001 From: Benjamin Kramer Date: Thu, 15 Sep 2011 21:08:54 +0000 Subject: [PATCH] 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 --- lib/DebugInfo/DWARFContext.cpp | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/lib/DebugInfo/DWARFContext.cpp b/lib/DebugInfo/DWARFContext.cpp index 5fd4280ba7a..4fc0b301bef 100644 --- a/lib/DebugInfo/DWARFContext.cpp +++ b/lib/DebugInfo/DWARFContext.cpp @@ -147,13 +147,19 @@ DILineInfo DWARFContext::getLineInfoForAddress(uint64_t address) { uint32_t cuOffset = getDebugAranges()->offsetAtIndex(arangeIndex); // Retrieve the compile unit. DWARFCompileUnit *cu = getCompileUnitForOffset(cuOffset); + if (!cu) + return DILineInfo("", 0, 0); // Get the line table for this compile unit. const DWARFDebugLine::LineTable *lineTable = getLineTableForCompileUnit(cu); + if (!lineTable) + return DILineInfo("", 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("", 0, 0); // From here, contruct the DILineInfo. const DWARFDebugLine::Row &row = lineTable->Rows[rowIndex]; -- 2.34.1