Re: [Help-smalltalk] Bus error while building GST 3.2 on SPARC Linux

[Gabriel Cuvillier]

Hello,

I have applied the patch, but problems are still here:

./gst --no-user-files --kernel-dir "./kernel" --image gst.im -iQ /dev/null
/root/smalltalk-3.2/kernel/File.st:225: Aborted
/root/smalltalk-3.2/kernel/File.st:225: Error occurred while not in byte 
code interpreter!!
[0xffffffff]

Here is the result of the GDB session with the following commands :
-> handle SIGSEGV noprint
-> run
-> bt
-> x/4xw blk
-> x mem
-> info registers
-> x/184x h (just in case)

Don't hesitate to to ask for more

./libtool --mode=execute gdb --args ./gst --no-user-files --kernel-dir 
"./kernel" --image gst.im -iQ /dev/null
GNU gdb 6.3-debian
This GDB was configured as "sparc-linux"...Using host libthread_db 
library "/lib/libthread_db.so.1".
warning: not using untrusted file ".gdbinit"

(gdb) handle SIGSEGV noprint
Signal        Stop      Print   Pass to program Description
SIGSEGV       No        No      Yes             Segmentation fault

(gdb) run
Starting program: /root/smalltalk-3.2/.libs/lt-gst --no-user-files 
--kernel-dir ./kernel --image gst.im -iQ /dev/null
[Thread debugging using libthread_db enabled]
[New Thread 16384 (LWP 21110)]
Program received signal SIGBUS, Bus error.
[Switching to Thread 16384 (LWP 21110)]
_gst_mem_alloc (h=0x38fd8, sz=184) at alloc.c:222
222           blk->vSmall.free = mem->next;

(gdb) bt
#0  _gst_mem_alloc (h=0x38fd8, sz=184) at alloc.c:222
#1  0x20061054 in _gst_tenure_oop (oop=0x203bb888) at oop.c:736
#2  0x20062aac in tenure_one_object () at oop.c:1619
#3  0x20062a1c in queue_put (q=0x20113b38, src=0x244352c0, n=7) at 
oop.c:1548
#4  0x200634f0 in _gst_copy_an_oop (oop=0x203d7d80) at oop.c:2066
#5  0x20063124 in scan_grey_pages () at oop.c:1844
#6  0x20062e60 in copy_oops () at oop.c:1752
#7  0x200620cc in _gst_scavenge () at oop.c:1226
#8  0x200b2390 in activate_new_context (size=17, sendArgs=1) at interp.c:829
#9  0x200a0e04 in _gst_send_message_internal (sendSelector=0x11, 
sendArgs=1, receiver=0x2040f028, method_class=0x83) at interp-bc.inl:306
#10 0x200a9fd4 in _gst_interpret (processOOP=0x2040efd8) at vm.def:713
#11 0x200b48dc in _gst_nvmsg_send (receiver=0x203e7118, 
sendSelector=0x203acf00, args=0x3edb72f4, sendArgs=2) at interp.c:2271
#12 0x2008328c in _gst_va_msg_sendf (resultPtr=0x3edb750c, 
fmt=0x200d9580 "%s %o value: %o value: %o", ap=0x3edb7500) at callin.c:304
#13 0x20083b3c in _gst_msg_sendf (resultPtr=0x3edb750c, fmt=0x200d9580 
"%s %o value: %o value: %o") at callin.c:379
#14 0x200551a8 in install_method (methodOOP=0x2040efc8) at comp.c:2637
#15 0x2005127c in _gst_compile_method (method=0x293190, 
returnLast=false, install=true) at comp.c:922
#16 0x20041540 in parse_method (p=0x3edb78d8, at_end=93) at gst-parse.c:1131
#17 0x2003fd24 in parse_class_definition (p=0x3edb78d8, 
classOOP=0x2040e170, extend=false) at gst-parse.c:868
#18 0x2003f4fc in parse_scoped_definition (p=0x3edb78d8, 
first_stmt=0x292c78) at gst-parse.c:523
#19 0x2003ed20 in parse_doit (p=0x3edb78d8, fail_at_eof=false) at 
gst-parse.c:462
#20 0x2003e144 in parse_chunks (p=0x3edb78d8) at gst-parse.c:364
#21 0x2003df0c in _gst_parse_chunks () at gst-parse.c:341
#22 0x200488a8 in _gst_parse_stream (method=false) at lex.c:1186
#23 0x2007f190 in _gst_process_file (fileName=0x0, dir=2544312) at 
input.c:846
#24 0x2003ccb0 in load_standard_files () at files.c:579
#25 0x2003c7d4 in _gst_initialize (kernel_dir=0x3edb7e75 "./kernel", 
image_file=0x3edb7e86 "gst.im", flags=5) at files.c:521
#26 0x00011324 in main (argc=141312, argv=0x3edb7d44) at main.c:385

(gdb) x/4xw blk
0x24720000:     0x000000c0      0x00000000      0x00000055      0x0000003d

(gdb) x mem
0x46141ede:     Cannot access memory at address 0x46141ede

(gdb) info registers
g0             0x0      0
g1             0x3d     61
g2             0xe      14
g3             0x200f7308       537883400
g4             0x200fd828       537909288
g5             0x4f664e65       1332104805
g6             0x10     16
g7             0x20298060       539590752
o0             0x38fd8  233432
o1             0x24720000       611450880
o2             0x0      0
o3             0x0      0
o4             0x2168f248       560525896
o5             0x115000 1134592
sp             0x3edb6a80       0x3edb6a80
o7             0x2008b4e8       537441512
l0             0x46141ede       1175723742
l1             0x1c     28
l2             0x1      1
l3             0x38ff4  233460
l4             0x80     128
l5             0x0      0
l6             0x894a8000       -1991606272
l7             0x200fa7d8       537896920
i0             0x38fd8  233432
i1             0xb8     184
i2             0x1c     28
i3             0x3      3
i4             0x18     24
i5             0x201b308c       538652812
fp             0x3edb6ae8       0x3edb6ae8
i7             0x2006104c       537268300
y              0x0      0
psr            0x83     131
wim            0x0      0
tbr            0x0      0
pc             0x2008b648       0x2008b648 <_gst_mem_alloc+360>
npc            0x2008b64c       0x2008b64c <_gst_mem_alloc+364>
fsr            0x0      0
csr            0x0      0

(gdb) x/184x h
0x38fd8:        0x24738000      0x247cc000      0x247ec000      0x247e4000
0x38fe8:        0x247b0000      0x24718000      0x247e8000      0x24720000
0x38ff8:        0x24730000      0x2476c000      0x24748000      0x2471c000
0x39008:        0x24750000      0x2472c000      0x2473c000      0x24714000
0x39018:        0x247f0000      0x2479c000      0x00000000      0x2477c000
0x39028:        0x247a4000      0x00000000      0x00000000      0x246f8000
0x39038:        0x00000000      0x00000000      0x00000000      0x00000000
0x39048:        0x00000000      0x00000000      0x00000000      0x00000000
0x39058:        0x00000000      0x00000000      0x00000000      0x00000000
0x39068:        0x00000000      0x00000000      0x00000000      0x00000000
0x39078:        0x00000000      0x00000000      0x00000000      0x00000000
0x39088:        0x00000000      0x00000000      0x00000000      0x00000000
0x39098:        0x000fc000      0x00020000      0x00400000      0x0000003f
0x390a8:        0x00000008      0x00000038      0x00000007      0x00000000
0x390b8:        0x200612bc      0x20061280      0x20061374      0x000000f1
0x390c8:        0x00000000      0x00000000      0x00000000      0x00000000
0x390d8:        0x00000000      0x00000000      0x00000000      0x00000000
0x390e8:        0x00000000      0x00000000      0x00000000      0x00000000
0x390f8:        0x00000000      0x00000000      0x00000000      0x00000000
0x39108:        0x00000000      0x00000000      0x00000000      0x00000000
0x39118:        0x00000000      0x00000000      0x00000000      0x00000000
0x39128:        0x00000000      0x00000000      0x00000000      0x00000000
0x39138:        0x00000000      0x00000000      0x00000000      0x00000000
0x39148:        0x00000000      0x00000000      0x00000000      0x00000000
0x39158:        0x00000000      0x00000000      0x00000000      0x00000000
0x39168:        0x00000000      0x00000000      0x00000000      0x00000000
0x39178:        0x00000000      0x00000000      0x00000000      0x00000000
0x39188:        0x00000000      0x00020000      0x00400000      0x00000000
0x39198:        0x00000000      0x00000000      0x00000000      0x00000000
0x391a8:        0x200612bc      0x20061280      0x20061374      0x00000011
0x391b8:        0x3c009674      0x20279674      0x203b1f30      0x00000011
0x391c8:        0x3e0095ac      0x202795ac      0x203b2040      0x00000011
0x391d8:        0x3d3d00ac      0x202795ac      0x203b21b0      0x00000011
0x391e8:        0x3c009644      0x20279644      0x00000040      0x00000011
0x391f8:        0x3e0095ac      0x202795ac      0x00039fd8      0x00000011
0x39208:        0x7e3d0024      0x20279624      0x00000040      0x00000011
0x39218:        0x3c009614      0x20279614      0x00000040      0x00000011
0x39228:        0x3e0095ac      0x202795ac      0x00000000      0x00000011
0x39238:        0x3c0095c4      0x202795c4      0x00000000      0x00000011
0x39248:        0x3e0095ac      0x202795ac      0x00000010      0x00000011
0x39258:        0x3c0095ac      0x202795ac      0x00000000      0x00000011
0x39268:        0x3e0095c4      0x202795c4      0x00000000      0x00000011
0x39278:        0x3e3e00b4      0x202795b4      0x00000010      0x00000021
0x39288:        0x00000000      0x00000000      0x00039470      0x00000001
0x39298:        0x20113bd0      0x20113bd4      0x00000001      0x00000019
0x392a8:        0x00231528      0x246f8000      0x00001000      0x00000000

Good luck :)

Bruno Haible a écrit :
> Paolo Bonzini wrote:
>   
> > It is mmaping files, but the particular spot where the SIGBUS is 
> > happening means that the area was anonymously mapped.  The mmaped file 
> > includes object data which is not movable and is not reused when an 
> > object inside there dies.  Instead oldspace is an anonymous mmap and it 
> > is a full-blown memory heap with malloc (_gst_mem_alloc) and free 
> > (_gst_mem_free).
> >     
>
> Yes, it should be safe then.
>
> Another reason for SIGBUS - on SPARC systems, never ocurring on x86 systems -
> is an unaligned address, for example an 'ld' instruction on an address that
> is not a multiple of 4, or an 'ldd' instruction on an address that is not a
> multiple of 8 (e.g. if it crosses a page boundary...).
>
>   
> > Let's wait for Gabriel's experiment.
> >     
>
> Yes. And it would be useful to see the values of 'blk', 'mem', and of the
> CPU registers in
> <http://lists.gnu.org/archive/html/help-smalltalk/2010-07/msg00017.html>.
>
> Bruno
>
>