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From: mos on 14 May 2010 03:35
Hi!
The code will cause msvcr100d.dll deadlock at GetProcAddress(hlib,
"MessageBoxW")))

int main()
{
char* p = new char;
delete p;
delete p;
return 0;
}

I have post the problem on microsoft.public.vsnet.ide,then I realise it
is more suitable here, I am sorry if you see it twice.

Best Regards.
Mos.


From: Ulrich Eckhardt on 14 May 2010 04:32
mos wrote:
> The code will cause msvcr100d.dll deadlock at GetProcAddress(hlib,
> "MessageBoxW")))
>
> int main()
> {
> char* p = new char;
> delete p;
> delete p;

So what? This code is invalid, you must not call delete twice. Use auto_ptr
or string/vector from the standard libraries if you have problems with
memory management.

Uli

--
C++ FAQ: http://parashift.com/c++-faq-lite

Sator Laser GmbH
Geschäftsführer: Thorsten Föcking, Amtsgericht Hamburg HR B62 932
From: mos on 14 May 2010 05:26
I know the code is invalid.
I just want it run or make a crash but not deadlock!

"Ulrich Eckhardt" <eckhardt(a)satorlaser.com> д����Ϣ����:2devb7-1jn.ln1(a)satorlaser.homedns.org...
> mos wrote:
>> The code will cause msvcr100d.dll deadlock at GetProcAddress(hlib,
>> "MessageBoxW")))
>>
>> int main()
>> {
>> char* p = new char;
>> delete p;
>> delete p;
>
> So what? This code is invalid, you must not call delete twice. Use
> auto_ptr
> or string/vector from the standard libraries if you have problems with
> memory management.
>
> Uli
>
> --
> C++ FAQ: http://parashift.com/c++-faq-lite
>
> Sator Laser GmbH
> Gesch?ftsf��hrer: Thorsten F?cking, Amtsgericht Hamburg HR B62 932


From: RFOG on 14 May 2010 05:38
I think better way to have a crash is:

char *p=0;
*p='h';



On Fri, 14 May 2010 17:26:24 +0800, "mos" <mmosquito(a)163.com> wrote:

>I know the code is invalid.
>I just want it run or make a crash but not deadlock!
>
>"Ulrich Eckhardt" <eckhardt(a)satorlaser.com> дÈëÏûÏ¢ÐÂÎÅ:2devb7-1jn.ln1(a)satorlaser.homedns.org...
>> mos wrote:
>>> The code will cause msvcr100d.dll deadlock at GetProcAddress(hlib,
>>> "MessageBoxW")))
>>>
>>> int main()
>>> {
>>> char* p = new char;
>>> delete p;
>>> delete p;
>>
>> So what? This code is invalid, you must not call delete twice. Use
>> auto_ptr
>> or string/vector from the standard libraries if you have problems with
>> memory management.
>>
>> Uli
>>
>> --
>> C++ FAQ: http://parashift.com/c++-faq-lite
>>
>> Sator Laser GmbH
>> Gesch?ftsf¨¹hrer: Thorsten F?cking, Amtsgericht Hamburg HR B62 932
>
ÿþM
From: mos on 14 May 2010 05:48
ok��It seems I should discrble the reason.
I try the windows SEH like:

#include <Windows.h>

int on_exception(PEXCEPTION_POINTERS pExceptPtrs)
{
print("catched the exception");
return EXCEPTION_EXECUTE_HANDLER;
}

int main()
{
__try
{
char* p = new char;
delete p;
delete p;
}
__except(on_exception(GetExceptionInformation()))
{
}
}

But the pragram is deadlock.
if I use "char* p = 0; *p = 0" the pragmram will print

catched the exception

That's all.


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