Re: multithreaded programs on arm-linux

[frank at betaversion dot net]

Quoting Daniel Jacobowitz <drow@false.org>:

> On Tue, Nov 01, 2005 at 07:10:51PM +0100, frank@betaversion.net wrote:
> > libthread_db is available on the system (/lib/libthread_db.so.1).
> > gdb successfully ran "thread_db_load()".
> >
> > Any ideas how i can debug this?
>
> Has libpthread.so been stripped?  Debug info can be removed, but you
> must leave the static symbol table (.symtab) to use native libthread_db.

No, it hasn't been stripped. And the the section .symtab also seems
to be available.

$ file libthread_db.so.1
libthread_db.so.1: ELF 32-bit LSB shared object, ARM, version 1 (ARM), not
stripped

$ readelf -a libthread_db.so.1
Section Headers:
[...]
[26] .symtab           SYMTAB          00000000 0047ec 000f80 10     27 189  4
[...]
Symbol table '.symtab' contains 248 entries:
   Num:    Value  Size Type    Bind   Vis      Ndx Name
     0: 00000000     0 NOTYPE  LOCAL  DEFAULT  UND
     1: 00000100     0 SECTION LOCAL  DEFAULT    1
     2: 00000120     0 SECTION LOCAL  DEFAULT    2
     3: 0000041c     0 SECTION LOCAL  DEFAULT    3
[...]
   245: 00003254   268 FUNC    GLOBAL DEFAULT   13 td_ta_clear_event
   246: 000022a0   204 FUNC    GLOBAL DEFAULT   13 td_thr_setfpregs
   247: 00000000     0 NOTYPE  WEAK   DEFAULT  UND __gmon_start__
[...]

Regards,
  Frank