[Bug lto/48384] lto, linker-plugin and optimization clutter the stack trace

["vincenzo.innocente at cern dot ch" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48384

--- Comment #2 from vincenzo Innocente <vincenzo.innocente at cern dot ch> 2011-03-31 10:39:36 UTC ---
Thanks,
at least on some system it seems to behave correclty.
I had to rebuild binutil to enable the plugin and something may have gone wrong
are you using standard bfd  "ld" or  gold?

vincenzo

On 31 Mar, 2011, at 12:28 PM, rguenth at gcc dot gnu.org wrote:

> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48384
> 
> --- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-03-31 10:28:07 UTC ---
> Hm.  I get
> 
>> LD_LIBRARY_PATH=. gdb ./t_hltog
> GNU gdb (GDB) SUSE (7.2.50.20110206-67.1)
> ...
> Program received signal SIGSEGV, Segmentation fault.
> 0x00007ffff7ff87eb in foo (h=0x0) at foo.cc:6
> 6         return *h +1;
> (gdb) bt
> #0  0x00007ffff7ff87eb in foo (h=0x0) at foo.cc:6
> #1  0x00007ffff7ff8709 in go (j=2001, h=0x0) at go.cc:5
> #2  0x000000000040063d in main (argc=1) at main.cc:7
> 
>> LD_LIBRARY_PATH=. gdb ./t_hltog2
> GNU gdb (GDB) SUSE (7.2.50.20110206-67.1)
> ...
> Program received signal SIGSEGV, Segmentation fault.
> go (j=Cannot access memory at address 0x0
> ) at go.cc:5
> 5         j+= foo(h);
> (gdb) bt
> #0  go (j=Cannot access memory at address 0x0
> ) at go.cc:5
> #1  0x000000000040062d in main (argc=<optimized out>) at main.cc:7
> 
>> LD_LIBRARY_PATH=. gdb ./t_hlto
> GNU gdb (GDB) SUSE (7.2.50.20110206-67.1)
> ...
> Program received signal SIGSEGV, Segmentation fault.
> 0x00007ffff7ff874b in go(int, int const*) () from ./libfoo_hlto.so
> (gdb) bt
> #0  0x00007ffff7ff874b in go(int, int const*) () from ./libfoo_hlto.so
> #1  0x000000000040062d in main ()
> 
> 
> which looks reasonable.
> 
> As I can't reproduce the issue at hand I didn't try to investigate
> what debuginfo parts may be off.  The assembly of the shared library
> shows that foo is inlined into go which appearantly didn't happen for
> you?  I don't have any foo symbol in the shared library.  So maybe
> gdb is confused by bogus debug information about inlines.
> 
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