too much spew with "set verbose on"

too much spew with "set verbose on"

[Roland McGrath]

So, I do have "set verbose on" in my .gdbinit and have for years.
But it was never quite so verbose in the past.

Here is a typical fragment of a gdb buffer I see lately
(gdb-7.1-26.fc13.x86_64).  This is a fresh "run" in a gdb that has does
several "run"s before.  See if you can spot my program's output in there.

It does all go away with "set verbose off".  But IIRC when I turned that on
(many years ago), it was just to see "Loading symbols for ..." messages, at
a time when there was often a noticeable pause after each "...".  I do like
to know what gdb is doing.  But this has gotten out of hand.  Does it
really need to be saying all this, and the same things so many times?


Thanks,
Roland


(gdb) rr
Trying host libthread_db library: libthread_db.so.1.
Host libthread_db.so.1 resolved to: /lib64/libthread_db.so.1.
td_ta_new failed: application not linked with libthread
Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols found)...done.
Trying host libthread_db library: libthread_db.so.1.
Host libthread_db.so.1 resolved to: /lib64/libthread_db.so.1.
td_ta_new failed: application not linked with libthread
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Symbols already loaded for /lib64/ld-linux-x86-64.so.2
Reading symbols from system-supplied DSO at 0x2aaaaaaab000...Reading symbols from /usr/lib/debug/lib/modules/2.6.33.5-124.fc13.x86_64/vdso/vdso.so.debug...done.
Trying host libthread_db library: libthread_db.so.1.
Host libthread_db.so.1 resolved to: /lib64/libthread_db.so.1.
td_ta_new failed: application not linked with libthread
done.
Trying host libthread_db library: libthread_db.so.1.
Host libthread_db.so.1 resolved to: /lib64/libthread_db.so.1.
td_ta_new failed: application not linked with libthread
Symbols already loaded for /lib64/ld-linux-x86-64.so.2
Symbols already loaded for /lib64/ld-linux-x86-64.so.2
Reading symbols from /home/roland/build/stock-elfutils/tests/../libdw/libdw.so.1...done.
Trying host libthread_db library: libthread_db.so.1.
Host libthread_db.so.1 resolved to: /lib64/libthread_db.so.1.
td_ta_new failed: application not linked with libthread
Loaded symbols for /home/roland/build/stock-elfutils/tests/../libdw/libdw.so.1
Reading symbols from /lib64/libc.so.6...(no debugging symbols found)...done.
Trying host libthread_db library: libthread_db.so.1.
Host libthread_db.so.1 resolved to: /lib64/libthread_db.so.1.
td_ta_new failed: application not linked with libthread
Loaded symbols for /lib64/libc.so.6
Reading symbols from ../libelf/libelf.so.1...done.
Trying host libthread_db library: libthread_db.so.1.
Host libthread_db.so.1 resolved to: /lib64/libthread_db.so.1.
td_ta_new failed: application not linked with libthread
Loaded symbols for ../libelf/libelf.so.1
Reading symbols from /lib64/libdl.so.2...(no debugging symbols found)...done.
Trying host libthread_db library: libthread_db.so.1.
Host libthread_db.so.1 resolved to: /lib64/libthread_db.so.1.
td_ta_new failed: application not linked with libthread
Loaded symbols for /lib64/libdl.so.2
Reading symbols from /usr/lib64/liblzma.so.0...(no debugging symbols found)...done.
Trying host libthread_db library: libthread_db.so.1.
Host libthread_db.so.1 resolved to: /lib64/libthread_db.so.1.
td_ta_new failed: application not linked with libthread
Loaded symbols for /usr/lib64/liblzma.so.0
Reading symbols from /lib64/libbz2.so.1...(no debugging symbols found)...done.
Trying host libthread_db library: libthread_db.so.1.
Host libthread_db.so.1 resolved to: /lib64/libthread_db.so.1.
td_ta_new failed: application not linked with libthread
Loaded symbols for /lib64/libbz2.so.1
Reading symbols from /lib64/libz.so.1...(no debugging symbols found)...done.
Trying host libthread_db library: libthread_db.so.1.
Host libthread_db.so.1 resolved to: /lib64/libthread_db.so.1.
td_ta_new failed: application not linked with libthread
Loaded symbols for /lib64/libz.so.1
Reading symbols from /lib64/libpthread.so.0...(no debugging symbols found)...done.
Trying host libthread_db library: libthread_db.so.1.
Host libthread_db.so.1 resolved to: /lib64/libthread_db.so.1.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Found 0 new threads in iteration 0.
Found 0 new threads in iteration 1.
Found 0 new threads in iteration 2.
Found 0 new threads in iteration 3.
Loaded symbols for /lib64/libpthread.so.0
Reading in symbols for ../../../redhat/stock-elfutils/libdw/relocate.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/relocate.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/dwarf_lineaddr.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/dwarf_aggregate_size.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/dwarf_getcfi_elf.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/cfi.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/fde.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/cie.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/dwarf_next_cfi.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/dwarf_entry_breakpoints.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/dwarf_func_inline.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/dwarf_decl_file.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/dwarf_getaranges.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/dwarf_getlocation.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/dwarf_formblock.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/dwarf_getscopevar.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/dwarf_getscopes_die.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/dwarf_getsrclines.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/dwarf_diecu.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/dwarf_cuoffset.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/dwarf_dieoffset.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/dwarf_siblingof.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/dwarf_formref_die.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/dwarf_ranges.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/dwarf_formudata.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/dwarf_formaddr.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/dwarf_formstring.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/dwarf_nextcu.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/libdwP.h... and 
../../../redhat/stock-elfutils/libdw/dwarf_getpubnames.c...done.
Reading in symbols for ../../../redhat/stock-elfutils/libdw/dwarf_lineaddr.c...done.
Found 0 new threads in iteration 0.
Found 1 new threads in iteration 0.
Symbols already loaded for /lib64/ld-linux-x86-64.so.2
Symbols already loaded for /home/roland/build/stock-elfutils/tests/../libdw/libdw.so.1
Symbols already loaded for /lib64/libc.so.6
Symbols already loaded for ../libelf/libelf.so.1
Symbols already loaded for /lib64/libdl.so.2
Symbols already loaded for /usr/lib64/liblzma.so.0
Symbols already loaded for /lib64/libbz2.so.1
Symbols already loaded for /lib64/libz.so.1
Symbols already loaded for /lib64/libpthread.so.0
Symbols already loaded for /lib64/ld-linux-x86-64.so.2
Symbols already loaded for /home/roland/build/stock-elfutils/tests/../libdw/libdw.so.1
Symbols already loaded for /lib64/libc.so.6
Symbols already loaded for ../libelf/libelf.so.1
Symbols already loaded for /lib64/libdl.so.2
Symbols already loaded for /usr/lib64/liblzma.so.0
Symbols already loaded for /lib64/libbz2.so.1
Symbols already loaded for /lib64/libz.so.1
Symbols already loaded for /lib64/libpthread.so.0
Reading symbols from ../backends/libebl_ppc64.so...done.
Loaded symbols for ../backends/libebl_ppc64.so
foo.c:2 -> (.text)+0xc (/home/roland/stock-elfutils-build/foo.c:2)
Symbols already loaded for /lib64/ld-linux-x86-64.so.2
Symbols already loaded for /home/roland/build/stock-elfutils/tests/../libdw/libdw.so.1
Symbols already loaded for /lib64/libc.so.6
Symbols already loaded for ../libelf/libelf.so.1
Symbols already loaded for /lib64/libdl.so.2
Symbols already loaded for /usr/lib64/liblzma.so.0
Symbols already loaded for /lib64/libbz2.so.1
Symbols already loaded for /lib64/libz.so.1
Symbols already loaded for /lib64/libpthread.so.0
Symbols already loaded for ../backends/libebl_ppc64.so
Symbols already loaded for /lib64/ld-linux-x86-64.so.2
Symbols already loaded for /home/roland/build/stock-elfutils/tests/../libdw/libdw.so.1
Symbols already loaded for /lib64/libc.so.6
Symbols already loaded for ../libelf/libelf.so.1
Symbols already loaded for /lib64/libdl.so.2
Symbols already loaded for /usr/lib64/liblzma.so.0
Symbols already loaded for /lib64/libbz2.so.1
Symbols already loaded for /lib64/libz.so.1
Symbols already loaded for /lib64/libpthread.so.0

Program exited normally.

Re: too much spew with "set verbose on"

[Roland McGrath]

> GDB is telling you what it is doing, so yes, it should be saying all
> this because that's exactly what it is doing.

Nonsense.  GDB is doing a thousand things it doesn't print about.
Plain "set verbose" is a normal user command for normal users, not
just for people interested in all manner of GDB internals.

"Symbols already loaded for ..." is not something GDB is doing.
It's something GDB is *not* doing.  But anyway, mostly I was referring
to the repetition of various identical messages more than once for
a single "run" command.

> We could perhaps move some of this output under separate "maintenance
> set verbose" flag, or perhaps "set print symbol-events" and "set print
> libthread_db-events" or some such.

The libthread_db events should certainly go into some maint subcommand.
I'm the libthread_db maintainer, and I don't want to see those!


Thanks,
Roland