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MAME 0.193 -verifyroms crash/out of memory
#235726 - 10/06/10 07:30 AM
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Run MAME 0.193 (including 0.193u3) with -verifyroms
carnevil1 and gauntdl24 display "out of memory"
gamecst2 causes MAME (mame.exe, but mamepp.exe is also affected) to crash in this way:
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Exception at EIP=0169BF61 (not found): ACCESS VIOLATION
While attempting to write memory at 0587D940
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EAX=0586A6F0 EBX=00000000 ECX=0000ED52 EDX=0586EBC0
ESI=02AB2A6D EDI=00010000 EBP=0022F918 ESP=0022F908
-----------------------------------------------------
Stack crawl:
0022F918: 0169BF61 (not found)
0022F9F8: 0138FEA9 (not found)
0022FA28: 013900EB (not found)
0022FB98: 01538A1D (not found)
0022FBE8: 014EB9AC (not found)
0022FD28: 014EB500 (not found)
0022FEB8: 00D28B44 (not found)
0022FEF8: 016E269E (not found)
0022FF88: 004013D1 (not found)
0022FF94: 76291194 (BaseThreadInitThunk+0x0012)
0022FFD4: 77BEB495 (RtlInitializeExceptionChain+0x0063)
0022FFEC: 77BEB468 (RtlInitializeExceptionChain+0x0036)
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Re: MAME 0.193 -verifyroms crash/out of memory
[Re: peter ferrie]
#235729 - 10/06/10 08:15 AM
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> Run MAME 0.193 (including 0.193u3) with -verifyroms
>
> carnevil1 and gauntdl24 display "out of memory"
>
Firstly, there is no MAME 0.193 so I must assume you are referring to MAME 0.139?
The "out of memory" error would suggest, not surprisingly, that you do not have enough memory. How much RAM do you have on this PC? The games you mention use large CHD's so would expect you to need at least 2GB RAM to run them, more the better.
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Re: MAME 0.193 -verifyroms crash/out of memory
[Re: peter ferrie]
#235737 - 10/06/10 11:59 AM
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You don't have a CHD inside a ZIP, do you? That's bad.
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| DMala |
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Re: MAME 0.193 -verifyroms crash/out of memory
[Re: Pernod]
#235770 - 10/06/10 06:42 PM
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> The "out of memory" error would suggest, not surprisingly, that you do not have
> enough memory.
Actually, that's pretty rarely the case. Memory in Windows is virtual, so unless you've turned off your swap file or are out of space on the drive where it's located, you pretty much can't run out, particularly in 64-bit Windows. It'll thrash the heck out of your drive once you run out of physical RAM, but it takes quite a bit to actually hit the wall.
I have no idea about this specific case, but in my experience "out of memory" errors are usually due to runaway allocation or some other error condition in the app.
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| Naoki |
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Re: MAME 0.193 -verifyroms crash/out of memory
[Re: DMala]
#235788 - 10/06/10 08:37 PM
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If so, then why could I not run Confidential Mission on Naomi GD-ROM in MAME until I had shut down loads of other programs (Including windows Explorer) until I had roughly 180~~~~ bytes/Mbs of pyschical RAM?
Edited by Naoki (10/06/10 08:38 PM)
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On a quest for Digital 573 and Dancing Stage EuroMix 2
By gods I've found it!
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Re: MAME 0.193 -verifyroms crash/out of memory
[Re: Naoki]
#235790 - 10/06/10 08:49 PM
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> If so, then why could I not run Confidential Mission on Naomi GD-ROM in MAME until I
> had shut down loads of other programs (Including windows Explorer) until I had
> roughly 180~~~~ bytes/Mbs of pyschical RAM?
Maybe it's because of memory fragmentation.
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| R. Belmont |
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Re: MAME 0.193 -verifyroms crash/out of memory
[Re: Pernod]
#235791 - 10/06/10 09:05 PM
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> The "out of memory" error would suggest, not surprisingly, that you do not have
> enough memory. How much RAM do you have on this PC? The games you mention use large
> CHD's so would expect you to need at least 2GB RAM to run them, more the better.
It also suggests he's doing something horrifically bad like zipping up the CHDs for those games. (Yes, MAME will actually work that way if you have enough RAM, but that defeats the entire point of the CHD system).
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| DMala |
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Sleep is overrated
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Re: MAME 0.193 -verifyroms crash/out of memory
[Re: Naoki]
#235794 - 10/06/10 09:41 PM
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> If so, then why could I not run Confidential Mission on Naomi GD-ROM in MAME until I
> had shut down loads of other programs (Including windows Explorer) until I had
> roughly 180~~~~ bytes/Mbs of physical RAM?
I dunno, once you get into heavy disk swapping, performance goes in the toilet and any number of things can go wrong. Were you getting an actual "out of memory" error message?
Maybe you really were legitimately running out of memory. Like I said, I know very little about what MAME does under the hood. I was just saying that "out of memory" more often than not is indicative of some other problem in an app, rather than it legitimately running out of memory.
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| Naoki |
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Re: MAME 0.193 -verifyroms crash/out of memory
[Re: DMala]
#235863 - 10/07/10 06:58 PM
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Well, Naomi CHDs, and correct me if I'm wrong, i think get loaded similar to a Zip, since the Naomi does this aswell. And your statment suggested that if i ran out of Pyshical RAM, windows would still continue loading the CHD, but it didn't.
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On a quest for Digital 573 and Dancing Stage EuroMix 2
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| Naoki |
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Re: MAME 0.193 -verifyroms crash/out of memory
[Re: CrapBoardSoftware]
#235864 - 10/07/10 06:59 PM
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But when i cleared enough RAM, the game loaded fine, unless I'm not understanding your post correctly.
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On a quest for Digital 573 and Dancing Stage EuroMix 2
By gods I've found it!
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| R. Belmont |
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Re: MAME 0.193 -verifyroms crash/out of memory
[Re: Naoki]
#235876 - 10/07/10 09:03 PM
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> Well, Naomi CHDs, and correct me if I'm wrong, i think get loaded similar to a Zip,
> since the Naomi does this aswell. And your statment suggested that if i ran out of
> Pyshical RAM, windows would still continue loading the CHD, but it didn't.
Can "Pyshical RAM" predict the future? *rimshot*
If you run out of physical RAM and you don't have sufficient space free on whatever HDD your swap file is on Windows will die and say "out of memory".
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| Naoki |
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Re: MAME 0.193 -verifyroms crash/out of memory
[Re: R. Belmont]
#235881 - 10/07/10 10:24 PM
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But despite the occasional "You are running low on space on C:\", which i still have roughl 1.5~2GB. So that makes roughly 3.5 availible RAM
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On a quest for Digital 573 and Dancing Stage EuroMix 2
By gods I've found it!
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| R. Belmont |
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Re: MAME 0.193 -verifyroms crash/out of memory
[Re: Naoki]
#235882 - 10/07/10 10:39 PM
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> But despite the occasional "You are running low on space on C:\", which i still have
> roughl 1.5~2GB. So that makes roughly 3.5 availible RAM
Naomi GD-ROM games allocate 1 GB in a single block for decrypting the disc, which doesn't leave Windows many options in most cases. And that's on top of all the memory Naomi itself needs.
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| Naoki |
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Re: MAME 0.193 -verifyroms crash/out of memory
[Re: R. Belmont]
#235885 - 10/07/10 11:33 PM
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oh right
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----
On a quest for Digital 573 and Dancing Stage EuroMix 2
By gods I've found it!
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Re: MAME 0.193 -verifyroms crash/out of memory
[Re: Pernod]
#237660 - 10/29/10 07:41 PM
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Yes, I meant 0.139, and the "out of memory" problem was that I had stored the CHDs in ZIP files (because some of them compress really well), and I had forgotten to extract them first.
However, the crash indicates that MAME is vulnerable to memory corruption that could result in the execution of arbitrary code. In the gamecstl case, there's a memory allocation overflow condition when the .zip file size exceeds 4Gb, but you don't need such a large file to demonstrate problems in the zip handling.
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| R. Belmont |
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Cuckoo for IGAvania
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Re: MAME 0.193 -verifyroms crash/out of memory
[Re: peter ferrie]
#237671 - 10/29/10 09:02 PM
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> However, the crash indicates that MAME is vulnerable to memory corruption that could
> result in the execution of arbitrary code.
Yes, and if you are running MAME as admin (Windows) / root (*IX) you get to keep all the pieces when you get owned. MAMEdev has at various times clearly communicated that MAME is not security-audited and should not be used in any kind of security-intensive situation.
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