One of my unit tests has been failing recently, and the odd thing is that when I attempt to debug it in gdb, it causes a segfault: $ gdb test/stdlib/HashMapTest GNU gdb (GDB) 7.0-ubuntu Copyright (C) 2009 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>... Reading symbols from /home/talin/Projects/tart/build-eclipse/test/stdlib/HashMapTest...done. (gdb) break main Segmentation fault I'm not sure whether this is LLVM's fault or mine - and I'm not sure how to go about finding out. I'm guessing something is wrong with the DWARF debugging info. -- -- Talin -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20100213/a2a36438/attachment.html>
You can print the dwarf using readelf -w or objdump -W, but understanding the output is beyond my ability. http://dwarfstd.org/Debugging%20using%20DWARF.pdf may describe it well enough for you to debug it. On Sat, Feb 13, 2010 at 9:42 AM, Talin <viridia at gmail.com> wrote:> One of my unit tests has been failing recently, and the odd thing is that > when I attempt to debug it in gdb, it causes a segfault: > > $ gdb test/stdlib/HashMapTest > GNU gdb (GDB) 7.0-ubuntu > Copyright (C) 2009 Free Software Foundation, Inc. > License GPLv3+: GNU GPL version 3 or later > <http://gnu.org/licenses/gpl.html> > This is free software: you are free to change and redistribute it. > There is NO WARRANTY, to the extent permitted by law. Type "show copying" > and "show warranty" for details. > This GDB was configured as "x86_64-linux-gnu". > For bug reporting instructions, please see: > <http://www.gnu.org/software/gdb/bugs/>... > Reading symbols from > /home/talin/Projects/tart/build-eclipse/test/stdlib/HashMapTest...done. > (gdb) break main > Segmentation fault > > I'm not sure whether this is LLVM's fault or mine - and I'm not sure how to > go about finding out. I'm guessing something is wrong with the DWARF > debugging info. > -- > -- Talin > > _______________________________________________ > LLVM Developers mailing list > LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev > >
On Sat, Feb 13, 2010 at 9:42 AM, Talin <viridia at gmail.com> wrote:> One of my unit tests has been failing recently, and the odd thing is that > when I attempt to debug it in gdb, it causes a segfault: > > $ gdb test/stdlib/HashMapTest > GNU gdb (GDB) 7.0-ubuntu > Copyright (C) 2009 Free Software Foundation, Inc. > License GPLv3+: GNU GPL version 3 or later > <http://gnu.org/licenses/gpl.html> > This is free software: you are free to change and redistribute it. > There is NO WARRANTY, to the extent permitted by law. Type "show copying" > and "show warranty" for details. > This GDB was configured as "x86_64-linux-gnu". > For bug reporting instructions, please see: > <http://www.gnu.org/software/gdb/bugs/>... > Reading symbols from > /home/talin/Projects/tart/build-eclipse/test/stdlib/HashMapTest...done. > (gdb) break main > Segmentation fault > > I'm not sure whether this is LLVM's fault or mine - and I'm not sure how to > go about finding out. I'm guessing something is wrong with the DWARF > debugging info.Probably a good guess, although gdb probably shouldn't crash either. If you file a bug against gdb, they can probably tell what is wrong. - Daniel> -- > -- Talin > > _______________________________________________ > LLVM Developers mailing list > LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev > >