hipe segmentation fault

[Patrice Rault]

Le mercredi 05 avril 2006 à 15:19 +0200, Mikael Pettersson a écrit :
> Date: Mon, 03 Apr 2006 10:30:15 -0400, Serge Aleynikov wrote:
> > Ops...  Sorry, this test case was taken from Rickard Green's post on 
> > profiling P11B smp scheduling support.  I wanted to run it on multi-cpu 
> > host, and installed R10B-10 and P11B releases with and without hipe.
> ...
> > Erlang (BEAM) emulator version 5.4.13 [source] [hipe] [threads:0]
> > 
> > Eshell V5.4.13  (abort with ^G)
> > 1> c(big, [native]).
> > {ok,big}
> > 2> big:bang(4).
> > Segmentation fault (core dumped)
> ...
> > (gdb) bt
> > #0  0x08aae41c in ?? ()
> > #1  0x080f0f63 in x86_call_to_native () at hipe/hipe_x86_glue.S:42
> > #2  0x00000000 in ?? ()
> > (gdb)
> > 
> > ...
> > 
> > Looking at hipe_x86_glue.S:42:
> > 
> > x86_call_to_native:
> >      ENTER_FROM_C
> >      /* get argument registers */
> >      LOAD_ARG_REGS
> >      /* call the target */
> >      NSP_CALL(*P_NCALLEE(P))  <-- Failing here
> > 
> > I'm not sure what this call does, but maybe Mikael can give a clue.
> 
> This is the entry point for BEAM calling a native-compiled function.
> NSP_CALL() currently expands to a plain "call" instruction; it's a macro so
> we can experiment with and measure other ways of performing calls and returns.
> 
> I'm unable to reproduce your problem here. The closest machine we
> have to yours is a dual HT P4 Xeon of the older 32-bit only type,
> running FC4 user-space on a custom 2.6.9-34 RHEL4 kernel, and things
> just work. Your test case also works on an Athlon64 running the same
> FC4/RHEL4 combo in pure 64-bit mode.
> 
> It would help if you could run beam from gdb (easiest is to attach to
> it, otherwise you have to set up several environment variables), and
> print the exact location of the program counter at the crash, list the
> surrounding assembler code, print the registers, and also the print the
> contents of "P" (print *p in a C frame, print *(Process*)$ebp ought to
> do the same in assembler mode).
> 
> /Mikael

Hello,
For information, on FC5 with kernel 2.6.16-1.2080_FC5.i686

Erlang (BEAM) emulator version 5.4.13 [source] [hipe] [threads:0]

Eshell V5.4.13  (abort with ^G)
1> c(big).
{ok,big}
2> big:bang(4).
3.20000e-5
3> c(big, [native]).
{ok,big}
4> big:bang(4).
Erreur de segmentation

And i got segmentation fault with ALL native compilations.
But with a switch to kernel 2.6.15-1.2054_FC5.i686, native compilation
work.

Regards.