On Thu, Dec 08, 2016 at 04:01:04PM +0000, K. Macy wrote:
> In tree gdb doesn't work for much of anything these days. It can't
even
> consistently give a complete kernel backtrace. Jhb is graciously
> maintaining gdb in ports. It will be installed as the awkwardly named
> gdb7111 IIRC.
1. gdb7111 badly integrated w/ 11 and up (don't see kernel debug
symbols)
2. all included in base systems can't be core dumped.
> On Thu, Dec 8, 2016 at 06:53 Slawa Olhovchenkov <slw at zxy.spb.ru>
wrote:
>
> > % gdb ./edge_stat
> >
> > GNU gdb 6.1.1 [FreeBSD]
> >
> > Copyright 2004 Free Software Foundation, Inc.
> >
> > GDB is free software, covered by the GNU General Public License, and
you
> > are
> >
> > welcome to change it and/or distribute copies of it under certain
> > conditions.
> >
> > Type "show copying" to see the conditions.
> >
> > There is absolutely no warranty for GDB. Type "show
warranty" for details.
> >
> > This GDB was configured as "amd64-marcel-freebsd"...
> >
> > (gdb) break main
> >
> > Segmentation fault (core dumped)
> >
> >
> >
> > % gdb /usr/bin/gdb /tmp/gdb.13573.core
> >
> > GNU gdb 6.1.1 [FreeBSD]
> >
> > Copyright 2004 Free Software Foundation, Inc.
> >
> > GDB is free software, covered by the GNU General Public License, and
you
> > are
> >
> > welcome to change it and/or distribute copies of it under certain
> > conditions.
> >
> > Type "show copying" to see the conditions.
> >
> > There is absolutely no warranty for GDB. Type "show
warranty" for details.
> >
> > This GDB was configured as "amd64-marcel-freebsd"...(no
debugging symbols
> > found)...
> >
> > Core was generated by `gdb'.
> >
> > Program terminated with signal 11, Segmentation fault.
> >
> > Reading symbols from /lib/libm.so.5...(no debugging symbols
found)...done.
> >
> > Loaded symbols for /lib/libm.so.5
> >
> > Reading symbols from /lib/libncursesw.so.8...(no debugging symbols
> > found)...done.
> >
> > Loaded symbols for /lib/libncursesw.so.8
> >
> > Reading symbols from /usr/lib/libgnuregex.so.5...(no debugging symbols
> > found)...done.
> >
> > Loaded symbols for /usr/lib/libgnuregex.so.5
> >
> > Reading symbols from /lib/libc.so.7...(no debugging symbols
found)...done.
> >
> > Loaded symbols for /lib/libc.so.7
> >
> > Reading symbols from /usr/lib/libthread_db.so...(no debugging symbols
> > found)...done.
> >
> > Loaded symbols for /usr/lib/libthread_db.so
> >
> > Reading symbols from /libexec/ld-elf.so.1...(no debugging symbols
> > found)...done.
> >
> > Loaded symbols for /libexec/ld-elf.so.1
> >
> > #0 0x00000000005da00b in cplus_demangle_v3_callback ()
> >
> > (gdb) bt
> >
> > #0 0x00000000005da00b in cplus_demangle_v3_callback ()
> >
> > #1 0x00000000005d9f9c in cplus_demangle_v3 ()
> >
> > #2 0x00000000005ca13c in cplus_demangle ()
> >
> > #3 0x0000000000487454 in class_name_from_physname ()
> >
> > #4 0x000000000053a4f3 in dwarf2_read_section ()
> >
> > #5 0x000000000053a0cc in dwarf2_read_section ()
> >
> > #6 0x0000000000539bd9 in dwarf2_read_section ()
> >
> > #7 0x0000000000537395 in dwarf2_read_section ()
> >
> > #8 0x0000000000539c21 in dwarf2_read_section ()
> >
> > #9 0x0000000000539643 in dwarf2_read_section ()
> >
> > #10 0x0000000000538a6c in dwarf2_read_section ()
> >
> > #11 0x00000000005352fb in dwarf2_read_section ()
> >
> > #12 0x0000000000533bfd in dwarf2_read_section ()
> >
> > #13 0x00000000004cfc46 in psymtab_to_symtab ()
> >
> > #14 0x00000000004c9cfb in lookup_symbol_global ()
> >
> > #15 0x0000000000482273 in cp_lookup_symbol_namespace ()
> >
> > #16 0x0000000000482059 in cp_lookup_symbol_nonlocal ()
> >
> > #17 0x0000000000481f63 in cp_lookup_symbol_nonlocal ()
> >
> > #18 0x00000000004c9780 in lookup_symbol ()
> >
> > #19 0x00000000005035cf in find_imps ()
> >
> > #20 0x0000000000514df9 in decode_line_1 ()
> >
> > #21 0x0000000000514589 in decode_line_1 ()
> >
> > #22 0x000000000046eff9 in _initialize_breakpoint ()
> >
> > #23 0x000000000046f48b in _initialize_breakpoint ()
> >
> > #24 0x00000000004ab289 in catch_exceptions ()
> >
> > #25 0x00000000004ab368 in catch_exceptions_with_msg ()
> >
> > #26 0x000000000046b169 in break_command ()
> >
> > #27 0x00000000004ab996 in execute_command ()
> >
> > #28 0x0000000000465293 in gdb_disable_readline ()
> >
> > #29 0x0000000000465182 in gdb_setup_readline ()
> >
> > #30 0x00000000005e266f in rl_callback_read_char ()
> >
> > #31 0x0000000000464c79 in gdb_setup_readline ()
> >
> > #32 0x0000000000465a46 in gdb_do_one_event ()
> >
> > #33 0x00000000004ab289 in catch_exceptions ()
> >
> > #34 0x00000000004ab42a in catch_errors ()
> >
> > #35 0x0000000000551168 in _initialize_tui_interp ()
> >
> > #36 0x0000000000448689 in gdb_main ()
> >
> > #37 0x00000000004ab289 in catch_exceptions ()
> >
> > #38 0x00000000004ab42a in catch_errors ()
> >
> > #39 0x0000000000448526 in gdb_main ()
> >
> > #40 0x00000000004ab289 in catch_exceptions ()
> >
> > #41 0x00000000004ab42a in catch_errors ()
> >
> > #42 0x0000000000447977 in gdb_main ()
> >
> > #43 0x0000000000447931 in main ()
> >
> > _______________________________________________
> >
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> >
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> >
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> >
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