There's a small detail wrong with the DWARF line number information: your code makes wrong assumptions when the line number state machine register state is reset. The DWARF specification says it's reset after DW_LNE_end_sequence, but as your code resets the register state, it doesn't emit a DW_LNE_end_sequence. The result is that some address/line number ranges in .debug_line are completely bogus.
This patch provides a simple fix by moving DW_LNE_end_sequence to where it is appropriate.
(Note that some DWARF consumers, such as GNU BFD, are able to deal with the buggy line number information.)
(I hope the wrong-code keyword isn't inappropriate here.)
Note that this bug is unrelated to bug 3214, which has yet to be fixed.
Comment #1 by nfxjfg — 2009-11-21T18:25:04Z
Created attachment 513
fix for .debug_line output
Comment #2 by leandro.lucarella — 2009-11-22T14:26:54Z