[Vm-dev] Re: Cog on Linux

[Paul DeBruicker]

>
> Have you updated to r2244 or better?  As I hoped in the log:
>
> svn log platforms/unix/vm/sqUnixHeartbeat.c
> r2244 | eliot | 2010-07-20 11:20:26 -0700 (Tue, 20 Jul 2010) | 3 lines
>
> Fix heartbeat clock log (-ve % +ve =>  -ve bounds violation).
> This will hopefully fix crashes in the heartbeat under linux.
>
> If you're already at 2244 then what's the backtrace in gdb, registers etc?
>
>    
Yes I think I'm at r2247. svn update finds no changes for platforms, 
src, and unixbuild.

You'll have to be explicit for what you want from gdb as I'm a complete 
novice.

Here's the gdb session:

paul at paul-laptop:~/src/squeakvm/unixbuild/bld$ gdb ./squeak
GNU gdb (GDB) 7.1-ubuntu
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later 
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /home/paul/src/squeakvm/unixbuild/bld/squeak...done.

(gdb) run Pharo-1.1-11409-rc4dev10.07.2.image
Starting program: /home/paul/src/squeakvm/unixbuild/bld/squeak 
Pharo-1.1-11409-rc4dev10.07.2.image
warning: the debug information found in "/lib/ld-2.11.1.so" does not 
match "/lib/ld-linux.so.2" (CRC mismatch).

[Thread debugging using libthread_db enabled]
[New Thread 0xb7adbb70 (LWP 27073)]

Program received signal SIGUSR2, User defined signal 2.
[Switching to Thread 0xb7adbb70 (LWP 27073)]
heartbeat_handler (sig=14, sig_info=0x63, context=0x0)
     at /home/paul/src/squeakvm/platforms/unix/vm/sqUnixHeartbeat.c:461
461     {

(gdb) bt
#0  heartbeat_handler (sig=14, sig_info=0x63, context=0x0)
     at /home/paul/src/squeakvm/platforms/unix/vm/sqUnixHeartbeat.c:461
#1 <signal handler called>
#2  0xf7fdf430 in __kernel_vsyscall ()
#3  0xf7fabb16 in nanosleep () from /lib32/libpthread.so.0
#4  0x0805fa38 in tickerSleepCycle (ignored=0x0)
     at /home/paul/src/squeakvm/platforms/unix/vm/sqUnixHeartbeat.c:375
#5  0xf7fa396e in start_thread () from /lib32/libpthread.so.0
#6  0xf7ed6b5e in clone () from /lib32/libc.so.6

(gdb) info registers
eax            0xe      14
ecx            0x0      0
edx            0x0      0
ebx            0xb7adb388       -1213353080
esp            0xb7adadfc       0xb7adadfc
ebp            0xb7adb398       0xb7adb398
esi            0xb7adbb70       -1213351056
edi            0x3d0f00 4001536
eip            0x805f6d0        0x805f6d0 <heartbeat_handler>
eflags         0x296    [ PF AF SF IF ]
cs             0x23     35
ss             0x2b     43
ds             0x2b     43
es             0x2b     43
fs             0x0      0
gs             0x63     99
(gdb)