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Index > Compiler Internals > [BUG] FASMW huge leakage + Erroneous time measurement

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LocoDelAssembly
Your code has a bug


Joined: 06 May 2005
Posts: 4633
Location: Argentina
LocoDelAssembly
(I have edited this post)

Try compiling the attached code several times, there will be a moment in which you will receive "Error: Out of memory" permanently and your computer will have no memory left.

I don't know what is the minimal code required, sorry... But happens even on successful compilation also.

Additionally the compilation time is seriously wrong, it reports thousands of seconds when actually it takes less than 2 seconds on my computer.


Description:
Filesize: 6.46 KB
Viewed: 2895 Time(s)

incorrect_time.PNG


Description:
Download
Filename: esf.asm
Filesize: 40.09 KB
Downloaded: 186 Time(s)



Last edited by LocoDelAssembly on 16 Sep 2008, 20:34; edited 1 time in total
Post 16 Sep 2008, 18:28
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17252
Location: In your JS exploiting you and your system
revolution
I get this with 100M fixed memory size:
Code:
flat assembler  version 1.67.28  (100000 kilobytes memory)
LocoDelAssemblyTest.asm [813]:
        LOCAL   hPen            :DWORD,\
error: illegal instruction.    
Post 16 Sep 2008, 18:34
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17252
Location: In your JS exploiting you and your system
revolution
How many times should I run it? I've put it in a batch file to loop and so far after a few hundreds of runs I can see no memory leak in task manager.
Post 16 Sep 2008, 18:36
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17252
Location: In your JS exploiting you and your system
revolution
Oh shit, I very stupid, you said FASMW. I was using FASM. Sorry Embarassed
Post 16 Sep 2008, 18:47
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LocoDelAssembly
Your code has a bug


Joined: 06 May 2005
Posts: 4633
Location: Argentina
LocoDelAssembly
Yet I think it is worth to mention my settings, I'm using 65536 KB of memory and on each (failed) compilation (Ctrl+F9) I lose 64 MB of memory. I have even received the yellow balloon warning me that there is no more memory and that Windows will try to expand it.

Once I have it fully ported to FASM (I went to lunch after creating this thread), I'll check if a successful compilation also leaks memory.
Post 16 Sep 2008, 19:01
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Tomasz Grysztar
Assembly Artist


Joined: 16 Jun 2003
Posts: 7715
Location: Kraków, Poland
Tomasz Grysztar
It seems that it is losing the whole fasm's core thread's memory block (it is allocated only one once per compilation). Thus perhaps the assembly thread goes into some wrong place and doesn't clean up or something...
Post 16 Sep 2008, 20:25
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LocoDelAssembly
Your code has a bug


Joined: 06 May 2005
Posts: 4633
Location: Argentina
LocoDelAssembly
Tomasz, I have edited my post, now the code is compilable and executable and I found an extra bug (I edited the thread's title to reflect that).
Post 16 Sep 2008, 20:37
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LocoDelAssembly
Your code has a bug


Joined: 06 May 2005
Posts: 4633
Location: Argentina
LocoDelAssembly
OK, I've found the minimal code:
Code:
abc fix  ; the symbol must be 3 chars wide at least to trigger the bug    


And this one to trigger the time bug at the same time:
Code:
qweaaaa fix
    
(Around 9,000.00 seconds)

So the bug may be related to http://board.flatassembler.net/topic.php?t=9131
Post 16 Sep 2008, 22:41
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