Le 04/07/2013 08:44, Armin Rigo a écrit :
Hi Alexis,
On Wed, Jul 3, 2013 at 4:04 PM, Alexis BRENON <[email protected]> wrote:
Is anyone got any idea where I can search to debug this ?
Check first that compiling programs works at all. Then, still with a
5-lines example .c, try to add options to gcc one at a time until you
reach a very similar command-line to the one in the generated
Makefile. I bet it crashes at some point.
A bientôt,
Armin.
Thanks Armin for you advice and I find where it crashes. When linking,
there is this option:
--version-script=../dynamic-symbols-1
I read this file and remembered that I already see a similar one when I
was searching on Google.
First this file looks like this :
{
global:
rpython_startup_code;
get_errno;
set_errno;
local:
*;
};
Adding the failing symbol in global make it works.
{
global:
rpython_startup_code;
get_errno;
set_errno;
__data_start;
local:
*;
};
Nevertheless, the resulting executable, which must display "Hello World"
(as usual), segfault when I launch it...
From GDB I get this, when running it with a breakpoint on main() (so it
fails before enterring in the main) :
Program received signal SIGSEGV, Segmentation fault.
0x77fc86a4 in dl_main (phdr=<value optimized out>, phnum=<value optimized out>,
user_entry=<value optimized out>, auxv=0x7fff6e44) at rtld.c:1652
1652 rtld.c: No such file or directory.
in rtld.c
(gdb) bt
#0 0x77fc86a4 in dl_main (phdr=<value optimized out>, phnum=<value optimized out>,
user_entry=<value optimized out>, auxv=0x7fff6e44) at rtld.c:1652
#1 0x77fdd560 in _dl_sysdep_start (start_argptr=<value optimized out>,
dl_main=0x77fc7a84 <dl_main>) at ../elf/dl-sysdep.c:244
#2 0x77fca5c4 in _dl_start_final (arg=0x7fff6e00, info=<value optimized out>)
at rtld.c:336
#3 0x77fca860 in _dl_start (arg=0x7fff6e00) at rtld.c:564
#4 0x77fc6894 in __start () from /lib/ld.so.1
Backtrace stopped: frame did not save the PC
This bug is the same as if translate my simple Rpython file with the -O2
option. The translation success, but I get the exactly same error on the
resulting executable... I encouter this error when I translate (with -O2
option) the targetpypystandalone.py file too, when it tries to execute
platcheck_0 during translation...
Maybe there is a deeper reason of all these failures. But I can't point
out which or where... Any idea ?
Thanks,
Alexis
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