[Info-vax] DCL crashing bug update

[Simon Clubley]

On 2017-07-24, Simon Clubley <clubley at remove_me.eisner.decus.org-Earth.UFP> wrote:
> $ !
> $ ! While exploring this bug on VMS Alpha running under the FreeAXP emulator,
> $ ! I experienced multiple crashes during a reboot. I do not know for sure
> $ ! if this has anything to do with the triggering of this bug or not so
> $ ! you have been warned.
> $ !
> $ ! ==> To be safe, I recommend you perform a reboot immediately after you
> $ ! have finished examining this bug even though I am having a hard time
> $ ! seeing how supervisor mode code could mess up the system to this level
> $ ! so for now I am assuming this is probably just an emulator artifact.
> $ !

About those crashes. Here's one that occurred this weekend during
a reboot:

============================================================================
Avanti System Machine Check Through Vector 00000660
logout frame address 0x6048 code 0x10000020c

IPRs:
EXC_ADD:0000000000110904  ICCSR:   000044F800000004  HIER:   0000000000000080
HIRR:   0000000000001040  MM_CSR:  00000000000051C0  DC_STAT:0000000000000007
DC_ADDR:0000000000000000  BIU_STAT:00000000000000C1  BIU_ADD:0000000045210000
FILL_SY:0000000000000000  FILL_ADD:0000000000000000  VA:     0000000000106C98
EXC_SUM:0000000000000000  BC_TAG:  0000000000000000  
  EDSR (Comanche): 00002008--> ,nxm error
  DCSR (    Epic): 8000001c--> 
  SEAR ( SysAddr): 00000000
  PEAR ( PciAddr): 00000000
============================================================================

The above repeated itself over and over and I eventually had to
shutdown FreeAXP because the console was not responding.

The next one was a VMS crash which occurred a couple of weeks ago when
I last looked at this problem.

============================================================================
Crashdump Summary Information:
------------------------------
Crash Time:         9-JUL-2017 12:02:55.00
Bugcheck Type:     MACHINECHK, Machine check while in kernel mode
Node:              AXPA    (Standalone)
CPU Type:          
VMS Version:       V8.4    
Current Process:   NULL
Current Image:     <not available>
Failing PC:        FFFFFFFF.800157A4    EXE$SYSTEM_CORRECTED_ERROR_C+00154
Failing PS:        00000000.00001F04
Module:            SYS$CPU_ROUTINES_0D02    (Link Date/Time: 31-MAR-2010 02:39:0
7.40)
Offset:            000017A4

Boot Time:         17-NOV-1858 00:00:00.00
System Uptime:               0 00:07:09.49
Crash/Primary CPU: 0./0.
System/CPU Type:   0D02
Saved Processes:   0
Pagesize:          8 KByte (8192 bytes)
Physical Memory:   128 MByte (16384 PFNs, contiguous memory)
Dumpfile Pagelets: 13498 blocks
Dump Flags:        olddump,writecomp,errlogcomp
Dump Type:         compressed,selective,shared_mem
EXE$GL_FLAGS:      poolpging,bugdump
Paging Files:      0 Pagefiles and 0 Swapfiles installed

Stack Pointers:
KSP = FFFFFFFF.831FBF00   ESP = FFFFFFFF.831FD000   SSP = FFFFFFFF.831F7000
USP = FFFFFFFF.831F7000

General Registers:
R0  = 00000000.0000004B   R1  = 00000000.00000210   R2  = FFFFFFFF.8183EE38
R3  = FFFFFFFF.8183F290   R4  = 00000000.00000048   R5  = 00000000.00001F04
R6  = FFFFFFFF.81C16000   R7  = 00000000.00000800   R8  = 00000000.00000000
R9  = 00000000.2009A000   R10 = FFFFFFFF.81C172D0   R11 = FFFFFFFF.8300E000
R12 = FFFFFFFF.81C16E40   R13 = FFFFFFFF.81C16000   R14 = FFFFFFFF.8325ADE8
R15 = FFFFFFFF.81808000   R16 = 00000000.00000215   R17 = 00000000.00004000
R18 = 00000000.00000002   R19 = 00000000.00000002   R20 = 00000000.00000004
R21 = 81C12080.00000000   R22 = 00000000.00000000   R23 = FFFFFFFF.8180A0F8
R24 = 00000000.00000000   AI  = 00000000.00000001   RA  = FFFFFFFF.80015708
PV  = FFFFFFFF.818C07D8   R28 = 00000000.00000000   FP  = FFFFFFFF.831FBF00
PC  = FFFFFFFF.800157A8   PS  = 00000000.00001F04
============================================================================

As already mentioned, I don't know if this is caused by the DCL crash
or (more likely) is an artifact of the emulator itself.

Simon.

-- 
Simon Clubley, clubley at remove_me.eisner.decus.org-Earth.UFP
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