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Re: Problem with older g++ or code


From: Brian C
Subject: Re: Problem with older g++ or code
Date: Tue, 24 Apr 2007 17:34:19 -0400
User-agent: Thunderbird 1.5.0.10 (Windows/20070221)

Paul Pluzhnikov wrote:
It may appear to work, but is it bug-free?

Rebuild it with -D_GLIBCXX_DEBUG, and see how many bugs that finds.
Also test it with Valgrind (www.valgrind.org).
Did that, and didn't see any output.

Program received signal SIGINT, Interrupt.
0xb7d46574 in malloc_consolidate () from /lib/tls/libc.so.6
(gdb) where
#0  0xb7d46574 in malloc_consolidate () from /lib/tls/libc.so.6
#1  0xb7d46438 in _int_free () from /lib/tls/libc.so.6
#2  0xb7d45278 in free () from /lib/tls/libc.so.6

The big question is: does it ever return from that level.
Execute 'gdb' finish command to find out.

If it doesn't return, it's a safe bet that you've corrupted heap.
In that case, Valgrind is your friend.

It doesn't return, and I started to take a closer look at the problem. I was a little frustrated last night and didn't give it a good look. Basically, I found the problem in my base exception class (which is older code). Basically, in some cases, it could try to access a pointer before it's been set, so that's been fixed.

Thanks.


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