[Openmcl-devel] Random crashing

[Osei Poku]

Hello,

About 5 times a day on a particular machine, ccl drops into the kernel  
debugger in an unrecoverable way.  ie pressing X does not return  
control back to lisp.  The following is a copy of the output on the  
terminal.  I have not included the other half of the session with is  
on the other side of swank because it might not be necessary to debug  
this problem.  If it is needed to completely understand the problem, I  
can provide that directly.  As is shown in the output, the lisp  
backtrace is not available.  So there might be something other than  
the lisp code going on here.  As I said, this problem has only occured  
on this particular machine.

The output of uname -a is

Linux fatterbox 2.6.22.5-31-default #1 SMP 2007/09/21 22:29:00 UTC  
x86_64 unknown unknown GNU/Linux



Any help/insight into what this is about is appreciated.

Osei




bash-2.05a$ lisp

; loading system definition from ccl:tools;asdf-install;asdf- 
install.asd.newest into #<Package "ASDF0">

; registering #<SYSTEM ASDF-INSTALL #x300040E5BD6D> as ASDF-INSTALL

;;; ASDF-Install version 0.6.10

; loading system definition from home:slime;swank.asd.newest into  
#<Package "ASDF0">

; registering #<SYSTEM :SWANK #x300040F39FAD> as SWANK

;Loading #P"/home/wtam/.slime/fasl/2008-04-24/openmcl-version_1.2- 
r9226-rc1__(linuxx8664)-linux-x86-64/swank-backend.lx64fsl"...

;Loading #P"/home/wtam/.slime/fasl/2008-04-24/openmcl-version_1.2- 
r9226-rc1__(linuxx8664)-linux-x86-64/metering.lx64fsl"...

;Loading #P"/home/wtam/.slime/fasl/2008-04-24/openmcl-version_1.2- 
r9226-rc1__(linuxx8664)-linux-x86-64/swank-openmcl.lx64fsl"...

;Loading #P"/home/wtam/.slime/fasl/2008-04-24/openmcl-version_1.2- 
r9226-rc1__(linuxx8664)-linux-x86-64/swank-gray.lx64fsl"...

;Loading #P"/home/wtam/.slime/fasl/2008-04-24/openmcl-version_1.2- 
r9226-rc1__(linuxx8664)-linux-x86-64/swank.lx64fsl"...

; Warning: These Swank interfaces are unimplemented:

;           (ACTIVATE-STEPPING ADD-FD-HANDLER ADD-SIGIO-HANDLER CALLS- 
WHO FIND-SOURCE-LOCATION MACROEXPAND-ALL REMOVE-FD-HANDLERS REMOVE- 
SIGIO-HANDLERS RESTART-FRAME RETURN-FROM-FRAME SLDB-BREAK-AT-START  
SLDB-BREAK-ON-RETURN SLDB-STEP-INTO SLDB-STEP-NEXT SLDB-STEP-OUT)

; While executing: SWANK-BACKEND::WARN-UNIMPLEMENTED-INTERFACES, in  
process listener(1).

Welcome to Clozure Common Lisp Version 1.2-r9226-RC1  (LinuxX8664)!

? (swank:create-server :port 4007 :dont-close t)

;; Swank started at port: 4007.

4007

? exception in foreign context

Exception occurred while executing foreign code

? for help

[20166] OpenMCL kernel debugger: ?

(G)  Set specified GPR to new value

(R)  Show raw GPR/SPR register values

(L)  Show Lisp values of tagged registers

(F)  Show FPU registers

(S)  Find and describe symbol matching specified name

(B)  Show backtrace

(T)  Show info about current thread

(X)  Exit from this debugger, asserting that any exception was handled

(K)  Kill OpenMCL process

(?)  Show this help

[20166] OpenMCL kernel debugger: R

%rax = 0x0000000000000000      %r8  = 0x000000004072B7E8

%rcx = 0xFFFFFFFFFFFFFFFF      %r9  = 0x000000004072B7E8

%rdx = 0x0000000000000000      %r10 = 0x0000000000000000

%rbx = 0x0000000040E577E8      %r11 = 0x0000000000000246

%rsp = 0x000000004072A278      %r12 = 0x000000004072B7E8

%rbp = 0x000000004072A730      %r13 = 0x000000004072A758

%rsi = 0x0000000000000028      %r14 = 0x0000000000000004

%rdi = 0x0000000000000000      %r15 = 0x000000004072AAE0

%rip = 0x00002B56B5BE22A0   %rflags = 0x0000000000010246

[20166] OpenMCL kernel debugger: F

f00: 0x00000000 (0.000000e+00), 0x0000000000000000 (0.000000e+00)

f01: 0x00000000 (0.000000e+00), 0x0000000000000000 (0.000000e+00)

f02: 0x00000000 (0.000000e+00), 0x0000000000000000 (0.000000e+00)

f03: 0x00000000 (0.000000e+00), 0x0000000000000000 (0.000000e+00)

f04: 0x00000000 (0.000000e+00), 0x0000000000000000 (0.000000e+00)

f05: 0x00000000 (0.000000e+00), 0x0000000000000000 (0.000000e+00)

f06: 0x00000000 (0.000000e+00), 0x0000000000000000 (0.000000e+00)

f07: 0x00000000 (0.000000e+00), 0x0000000000000000 (0.000000e+00)

f08: 0x00000000 (0.000000e+00), 0x0000000000000000 (0.000000e+00)

f09: 0x00000000 (0.000000e+00), 0x0000000000000000 (0.000000e+00)

f10: 0x00000000 (0.000000e+00), 0x0000000000000000 (0.000000e+00)

f11: 0x00000000 (0.000000e+00), 0x0000000000000000 (0.000000e+00)

f12: 0x00000000 (0.000000e+00), 0x0000000000000000 (0.000000e+00)

f13: 0x00000000 (0.000000e+00), 0x0000000000000000 (0.000000e+00)

f14: 0x00000000 (0.000000e+00), 0x0000000000000000 (0.000000e+00)

f15: 0x00000000 (0.000000e+00), 0x0000000000000000 (0.000000e+00)

mxcsr = 0x00001f80

[20166] OpenMCL kernel debugger: B

Framepointer [#x4072A730] in unknown area.

[20166] OpenMCL kernel debugger: T

Current Thread Context Record (tcr) = 0x4072b7e8

Control (C) stack area:  low = 0x404d8000, high = 0x4072c000

Value (lisp) stack area: low = 0x2aaaab2f1000, high = 0x2aaaab502000

Exception stack pointer = 0x4072a278

[20166] OpenMCL kernel debugger: L

%rsi (arg_z) = 5

%rdi (arg_y) = 0

%r8  (arg_x) = 135157501

------

%r13 (fn) = 135156971

------

%r15 (save0) = 135157084

Segmentation fault