Re: [PATCH] Handle absence of DT_DEBUG while debugging ld.so

[Luis Machado <luisgpm@linux.vnet.ibm.com>]

Ping?

On Tue, 2008-07-29 at 09:45 -0300, Luis Machado wrote:
> On Tue, 2008-07-29 at 08:12 -0400, Daniel Jacobowitz wrote:
> > On Mon, Jul 28, 2008 at 11:57:15PM -0300, Luis Machado wrote:
> > > Yes, this specific address seems broken somehow. This is the first
> > > _r_debug entry GDB gets:
> > 
> > Looks like the section offsets are not set yet.
> > 
> > > And this is the next _r_debug minimal symbol entry GDB gets:
> > 
> > What do you mean by "next"?  What commands did you use to get this
> > output?
> 
> "Next" as in the entry GDB locates in the next time it calls
> elf_locate_base(...), this time solib_create_inferior_hook(...) is in
> the code path after post_create_inferior(...):
> 
> #0  elf_locate_base () at /home/luis/src/gdb/gdb-head/HEAD3/gdb/solib-svr4.c:494
> #1  0x00000000100af30c in locate_base () at /home/luis/src/gdb/gdb-head/HEAD3/gdb/solib-svr4.c:570
> #2  0x00000000100af9a4 in svr4_current_sos () at /home/luis/src/gdb/gdb-head/HEAD3/gdb/solib-svr4.c:760
> #3  0x00000000100ad208 in update_solib_list (from_tty=0, target=0x108fd990) at /home/luis/src/gdb/gdb-head/HEAD3/gdb/solib.c:494
> #4  0x00000000100ad630 in solib_add (pattern=0x0, from_tty=0, target=0x108fd990, readsyms=1)
>     at /home/luis/src/gdb/gdb-head/HEAD3/gdb/solib.c:677
> #5  0x00000000100b0058 in enable_break () at /home/luis/src/gdb/gdb-head/HEAD3/gdb/solib-svr4.c:989
> #6  0x00000000100b0a94 in svr4_solib_create_inferior_hook () at /home/luis/src/gdb/gdb-head/HEAD3/gdb/solib-svr4.c:1408
> #7  0x00000000100adc60 in solib_create_inferior_hook () at /home/luis/src/gdb/gdb-head/HEAD3/gdb/solib.c:884
> #8  0x00000000101973e8 in post_create_inferior (target=0x108fd990, from_tty=0) at /home/luis/src/gdb/gdb-head/HEAD3/gdb/infcmd.c:441
> 
> ... whereas the first time it was called:
> 
> #0  elf_locate_base () at /home/luis/src/gdb/gdb-head/HEAD3/gdb/solib-svr4.c:494
> #1  0x00000000100af30c in locate_base () at /home/luis/src/gdb/gdb-head/HEAD3/gdb/solib-svr4.c:570
> #2  0x00000000100af9a4 in svr4_current_sos () at /home/luis/src/gdb/gdb-head/HEAD3/gdb/solib-svr4.c:760
> #3  0x00000000100ad208 in update_solib_list (from_tty=0, target=0x108fd990) at /home/luis/src/gdb/gdb-head/HEAD3/gdb/solib.c:494
> #4  0x00000000100ad630 in solib_add (pattern=0x0, from_tty=0, target=0x108fd990, readsyms=1)
>     at /home/luis/src/gdb/gdb-head/HEAD3/gdb/solib.c:677
> #5  0x00000000101973e0 in post_create_inferior (target=0x108fd990, from_tty=0) at /home/luis/src/gdb/gdb-head/HEAD3/gdb/infcmd.c:433
> 
> 
> > Also, with GDB 6.8 I can "continue" after this error.  With HEAD:
> > 
> > Continuing.
> > Cannot execute this command while the selected thread is running.
> > 
> > Hey, Pedro?  Cleanup trouble?
> 
> Yes, i discussed this with Pedro yesterday and he's aware of the
> problem.
> 
> Luis
>