[DebugInfo] Bail out if making no progress dumping line tables.
llvm-svn: 319564
diff --git a/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp b/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
index 5893f22..414959c 100644
--- a/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
+++ b/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
@@ -357,12 +357,16 @@
// Verbose dumping is done during parsing and not on the intermediate
// representation.
OS << "debug_line[" << format("0x%8.8x", Offset) << "]\n";
+ unsigned OldOffset = Offset;
if (DumpOpts.Verbose) {
LineTable.parse(LineData, &Offset, U, &OS);
} else {
LineTable.parse(LineData, &Offset, U);
LineTable.dump(OS);
}
+ // Check for unparseable prologue, to avoid infinite loops.
+ if (OldOffset == Offset)
+ break;
}
}