[Vm-dev] [Cog] cmType ~= CMMethod

Mariano Martinez Peck marianopeck at gmail.com
Fri Apr 1 10:33:28 UTC 2011


Hi Eliot. I am still finding this problem with latest CogVM. I cannot say
more than what I have already say. I've tried with all your VMs, including
the latest VM.r2370. I tried Pharo CI vms, and compiled by my own...all same
result so I think it is a problem in the core of Cog, related to the usage
of objects as methods.

Just in case I am in Mac OS 10.6.7

I can tell you all this information:

- My tests are all about using proxies for compiled methods (using the
#cannotInterpret: and #run:with:in tricks).
- The crash DOES NOT happens if I compile a StackVM, it ONLY happens in
CogVM.
- With Cog, I have the crash with both, Development or Production.

I have prepared an image with a test runner open where you only need to run
the test. If it doesn't crash in the first time, in the second it will for
sure.

Link to the image prepared:
https://gforge.inria.fr/frs/download.php/28432/cogCrash.zip


I also told you that in the gdb console, just before crashing I can see:

((((CogMethod *) methodHeader)->cmType)) == CMMethod 43322

((((CogMethod *) methodHeader)->cmType)) == CMMethod 43322

((((CogMethod *) methodHeader)->cmType)) == CMMethod 20705

((((CogMethod *) methodHeader)->cmType)) == CMMethod 20705

((((CogMethod *) methodHeader)->cmType)) == CMMethod 43322

((((CogMethod *) methodHeader)->cmType)) == CMMethod 43322

((((CogMethod *) methodHeader)->cmType)) == CMMethod 20705

((((CogMethod *) methodHeader)->cmType)) == CMMethod 20705

((((CogMethod *) methodHeader)->cmType)) == CMMethod 43322

((((CogMethod *) methodHeader)->cmType)) == CMMethod 43322

((((CogMethod *) methodHeader)->cmType)) == CMMethod 20705

((((CogMethod *) methodHeader)->cmType)) == CMMethod 20705

((((CogMethod *) methodHeader)->cmType)) == CMMethod 43322

((((CogMethod *) methodHeader)->cmType)) == CMMethod 43322

((((CogMethod *) methodHeader)->cmType)) == CMMethod 20705

((((CogMethod *) methodHeader)->cmType)) == CMMethod 20705

((((CogMethod *) methodHeader)->cmType)) == CMMethod 43322

((((CogMethod *) methodHeader)->cmType)) == CMMethod 43322

((((CogMethod *) methodHeader)->cmType)) == CMMethod 20705

((((CogMethod *) methodHeader)->cmType)) == CMMethod 20705

((((CogMethod *) methodHeader)->cmType)) == CMMethod 43322

((((CogMethod *) methodHeader)->cmType)) == CMMethod 43322



I also paste here the stack of the crash:




Process:         Croquet [30987]
Path:            /Users/mariano/Pharo/VM/Cog 8.app/Contents/MacOS/Croquet
Identifier:      com.teleplace.Teleplace
Version:         Croquet Cog 3.0.0 (4.0.0)
Code Type:       X86 (Native)
Parent Process:  launchd [228]

Date/Time:       2011-04-01 12:25:48.162 +0200
OS Version:      Mac OS X 10.6.7 (10J869)
Report Version:  6

Interval Since Last Report:          170620 sec
Crashes Since Last Report:           1
Per-App Interval Since Last Report:  138436 sec
Per-App Crashes Since Last Report:   3
Anonymous UUID:                      1619B1AF-FDFA-4D6A-B54D-479432C4B547

Exception Type:  EXC_BAD_ACCESS (SIGABRT)
Exception Codes: 0x000000000000000d, 0x0000000000000000
Crashed Thread:  0  Dispatch queue: com.apple.main-thread

Application Specific Information:
abort() called

Thread 0 Crashed:  Dispatch queue: com.apple.main-thread
0   libSystem.B.dylib                 0x98e28156 __kill + 10
1   libSystem.B.dylib                 0x98e28148 kill$UNIX2003 + 32
2   libSystem.B.dylib                 0x98eba899 raise + 26
3   libSystem.B.dylib                 0x98ed09b8 abort + 93
4   com.teleplace.Teleplace           0x0006dec8 sigsegv + 184
5   libSystem.B.dylib                 0x98e2d45b _sigtramp + 43
6   ???                               0x1acc59a4 0 + 449599908
7   ???                               0x1ad505a0 0 + 450168224

Thread 1:  Dispatch queue: com.apple.libdispatch-manager
0   libSystem.B.dylib                 0x98ded922 kevent + 10
1   libSystem.B.dylib                 0x98dee03c _dispatch_mgr_invoke + 215
2   libSystem.B.dylib                 0x98ded4f9 _dispatch_queue_invoke +
163
3   libSystem.B.dylib                 0x98ded29e _dispatch_worker_thread2 +
240
4   libSystem.B.dylib                 0x98decd21 _pthread_wqthread + 390
5   libSystem.B.dylib                 0x98decb66 start_wqthread + 30

Thread 2:
0   libSystem.B.dylib                 0x98dec9b2 __workq_kernreturn + 10
1   libSystem.B.dylib                 0x98decf48 _pthread_wqthread + 941
2   libSystem.B.dylib                 0x98decb66 start_wqthread + 30

Thread 3:
0   libSystem.B.dylib                 0x98dec9b2 __workq_kernreturn + 10
1   libSystem.B.dylib                 0x98decf48 _pthread_wqthread + 941
2   libSystem.B.dylib                 0x98decb66 start_wqthread + 30

Thread 4:  com.apple.CFSocket.private
0   libSystem.B.dylib                 0x98de6066 select$DARWIN_EXTSN + 10
1   com.apple.CoreFoundation          0x920f3c83 __CFSocketManager + 1091
2   libSystem.B.dylib                 0x98df47fd _pthread_start + 345
3   libSystem.B.dylib                 0x98df4682 thread_start + 34

Thread 5:
0   libSystem.B.dylib                 0x98dec9b2 __workq_kernreturn + 10
1   libSystem.B.dylib                 0x98decf48 _pthread_wqthread + 941
2   libSystem.B.dylib                 0x98decb66 start_wqthread + 30

Thread 6:
0   libSystem.B.dylib                 0x98df5046 __semwait_signal + 10
1   libSystem.B.dylib                 0x98e20ec5 nanosleep$UNIX2003 + 188
2   com.teleplace.Teleplace           0x000b063b beatStateMachine + 139
3   libSystem.B.dylib                 0x98df47fd _pthread_start + 345
4   libSystem.B.dylib                 0x98df4682 thread_start + 34

Thread 0 crashed with X86 Thread State (32-bit):
  eax: 0x00000000  ebx: 0x98ed0967  ecx: 0xbff60b6c  edx: 0x98e28156
  edi: 0xbff61310  esi: 0xbff60fec  ebp: 0xbff60b88  esp: 0xbff60b6c
   ss: 0x0000001f  efl: 0x00000282  eip: 0x98e28156   cs: 0x00000007
   ds: 0x0000001f   es: 0x0000001f   fs: 0x00000000   gs: 0x00000037
  cr2: 0x00108df0

Binary Images:
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Model: MacBookPro6,2, BootROM MBP61.0057.B0C, 2 processors, Intel Core i5,
2.4 GHz, 4 GB, SMC 1.58f16
Graphics: NVIDIA GeForce GT 330M, NVIDIA GeForce GT 330M, PCIe, 256 MB
Graphics: Intel HD Graphics, Intel HD Graphics, Built-In, 288 MB
Memory Module: global_name
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x93),
Broadcom BCM43xx 1.0 (5.10.131.36.9)
Bluetooth: Version 2.4.0f1, 2 service, 19 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Serial ATA Device: ST9500420ASG, 465.76 GB
Serial ATA Device: MATSHITADVD-R   UJ-898
USB Device: Hub, 0x0424  (SMSC), 0x2514, 0xfd100000
USB Device: Built-in iSight, 0x05ac  (Apple Inc.), 0x8507, 0xfd110000
USB Device: IR Receiver, 0x05ac  (Apple Inc.), 0x8242, 0xfd120000
USB Device: Hub, 0x0424  (SMSC), 0x2514, 0xfa100000
USB Device: Keyboard Hub, 0x05ac  (Apple Inc.), 0x1005, 0xfa140000
USB Device: Apple Keyboard, 0x05ac  (Apple Inc.), 0x021e, 0xfa142000
USB Device: Apple Internal Keyboard / Trackpad, 0x05ac  (Apple Inc.),
0x0237, 0xfa120000
USB Device: Internal Memory Card Reader, 0x05ac  (Apple Inc.), 0x8403,
0xfa130000
USB Device: BRCM2070 Hub, 0x0a5c  (Broadcom Corp.), 0x4500, 0xfa110000
USB Device: Bluetooth USB Host Controller, 0x05ac  (Apple Inc.), 0x8218,
0xfa113000
FireWire Device: Passport III, WD, Up to 800 Mb/sec


On Tue, Dec 21, 2010 at 7:53 PM, Mariano Martinez Peck <
marianopeck at gmail.com> wrote:

>
>
> On Mon, Dec 20, 2010 at 7:55 PM, Eliot Miranda <eliot.miranda at gmail.com>wrote:
>
>>
>> Hi Mariano,
>>
>>    this looks like a Cog VM bug.  You should try and create a reproducible
>> case and then send it to me.
>>
>
> Hi Eliot. Define "reproducable case" ;)
> Really, I don't have a simple TestCase/Doit that reproduce this, but I can
> be sure that when running all my tests (that use objects as methods) it
> crashes. If it is not in the first time, for SURE in the second. But as
> said, it is not always in the same place not the same test. Because the
> problem seems while running an incremental GC.
>
> What I can provide you is a Pharo image, with all my code loaded, and the
> test runner open with the test you have to run. And promise: if the first
> time or second, you will have the crash.
> I tried to upload the image to the gforge project and we have a problem
> right now with it. I just send it by private email to you. I hope you don'y
> bother.
>
> I can tell you all this information:
>
> - My tests are all about using proxies for compiled methods (using
> #cannotInterpret: and #run:with:in:  tricks).
> - The crash DOES NOT happens if I compile a StackVM, it ONLY happens in
> CogVM.
> - With Cog, I have the crash with both, Development or Production.
>
> Thanks A LOT in advance,
>
> Mariano
>
>
>
>
>>
>> On Mon, Dec 20, 2010 at 5:31 AM, Mariano Martinez Peck <
>> marianopeck at gmail.com> wrote:
>>
>>>
>>> Hi Eliot. I am having some asserts failing while running my tests. Most
>>> of them during the sweep phase of the GC.
>>>
>>> The two places where it fails is in
>>>
>>> - NewCoObjectMemory >> lastPointerWhileForwarding: oop
>>>
>>> if fails the assert:       self assert: (coInterpreter cCoerceSimple:
>>> methodHeader to: #'CogMethod *') cmType = CMMethod.
>>> In different runs, the cmType answer me 1 (CMFree)
>>>
>>> - NewCoObjectMemory >> lastPointerOf: oop recordWeakRoot: recordWeakRoot
>>> "<Boolean>"
>>>
>>> and it fails in the same assert:        self assert: (coInterpreter
>>> cCoerceSimple: methodHeader to: #'CogMethod *') cmType = CMMethod.
>>>
>>> In different runs, I got values 0 or 6. BTW....seing:
>>>
>>> initializeCogMethodConstants
>>>     CMOpenPIC := 1 + (CMClosedPIC := 1 + (CMBlock := 1 +(CMMethod := 1 +
>>> (CMFree := 1))))
>>>
>>> I cannot understand how can I get 0 or 6....
>>>
>>>
>>> Anyway, my question is if you have a clue of what can be happening so
>>> that those asserts are failing. I am using Objects as methods, but normal
>>> objects (subclasses of ProtoObject).
>>>
>>> Thanks in advance,
>>>
>>> mariano
>>>
>>>
>>
>>
>
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