possible thread deadlock on printf?

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Jun - 09 Jul 2005 15:34 GMT

hi,

deadlock on printf?

> server testing.exe!printf(const char * format=0x000007b4, ...) Line 65 +
> 0x1d C

but i only have 2 running threads at console app... i have no idea printf()
does deadlock.
it always shows after few min of testing...

any ideas? suggestions? or is there something i missed? (or rewrite in win
app? :-S)

thanks in advance.

-jun

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Jun - 09 Jul 2005 21:58 GMT

> hi,
>
[quoted text clipped - 13 lines]
>
> -jun

hi,

just found out that it deadlocks on creating mutex

code...
...
printf(" ProcessReply() mutex created\n");
MutexLock _lock(g_chLock);
printf(" ProcessReply() lock started\n");
...
printf(" ProcessReply() mutex destroy\n");

and this is how i found out
...
ThreadDatabase() mutex created
ThreadDatabase() lock started
...
ThreadDatabase() mutex destroy

ProcessReply() mutex created
STUCKED HERE!

i even tried criticalsection at first, still same :(

any idea?

thanks
-jun

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Carl Daniel [VC++ MVP] - 09 Jul 2005 22:48 GMT

>> hi,
>>
[quoted text clipped - 39 lines]
>
> any idea?

Show more code. What is the complete definition of MutexLock?

-cd

Reply to this Message

Jun - 10 Jul 2005 05:19 GMT

>>> hi,
>>>
[quoted text clipped - 43 lines]
>
> -cd

hi,

i'm using the http://www.bbdsoft.com/win32.html

-jun

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Carl Daniel [VC++ MVP] - 10 Jul 2005 06:03 GMT

> "Carl Daniel [VC++ MVP]"
>>
>> Show more code. What is the complete definition of MutexLock?
>
> i'm using the http://www.bbdsoft.com/win32.html

OK, fine. Those classes look straightforward and correct. How 'bout showing
a bit more of your code now?

-cd

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Jun - 10 Jul 2005 06:48 GMT

>> "Carl Daniel [VC++ MVP]"
>>>
[quoted text clipped - 6 lines]
>
> -cd

oh ok, the code kinda bit bloated, here is the basic...

if (true)
{
CriticalLock _lock(g_chLock);
std::map<int, tPlayerInfo>::iterator _iterPlayerInfo =
m_mPlayerInfo.begin();
while(_iterPlayerInfo != m_mPlayerInfo.end())
{
...
++_iterPlayerInfo;
}
}

program runs only 2 threads... main() doesn't do anything just to input a
string.
i'm just protecting the m_mPlayerInfo from sharing...

hope this helps, probably any good tool to detect deadlock?

thanks
-jun

Reply to this Message

Jun - 10 Jul 2005 07:30 GMT

>> "Carl Daniel [VC++ MVP]"
>>>
[quoted text clipped - 6 lines]
>
> -cd

sorry, i think it has something to do with memory leaks :-(

try to post if anythings comes up

thanks a lot
-jun

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possible thread deadlock on printf?

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