[Box Backup] Debugging boxbackup

[Ben Summers]

On 28 Jan 2004, at 20:46, Ben Lovett wrote:

> On Wed, Jan 28, 2004 at 05:39:33PM +0000, Ben Summers wrote:
>> I'm very curious about where the abort happens. Thanks for trying it  
>> on
>> an unusual platform!
>
> Starting program:  
> /usr/obj/ports/boxbackup-0.03/boxbackup-0.03/debug/bin/ 
> bbstoreaccounts/bbstoreaccounts create 1 0 2097152 2306867
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x000000000016bc48 in std::_Rb_tree<void*, std::pair<void* const,  
> MallocBlockInfo>, std::_Select1st<std::pair<void* const,  
> MallocBlockInfo> >, std::less<void*>, std::allocator<std::pair<void*  
> const, MallocBlockInfo> > >::lower_bound(void* const&)  
> (this=0x30ffffffffffffdf, __k=@0xe0ffffffffffffa7)
>     at /usr/include/g++/bits/stl_tree.h:1320
> 1320          _Link_type __x = _M_root(); /* Current node. */
> (gdb) where
> #0  0x000000000016bc48 in std::_Rb_tree<void*, std::pair<void* const,  
> MallocBlockInfo>, std::_Select1st<std::pair<void* const,  
> MallocBlockInfo> >, std::less<void*>, std::allocator<std::pair<void*  
> const, MallocBlockInfo> > >::lower_bound(void* const&)  
> (this=0x30ffffffffffffdf, __k=@0xe0ffffffffffffa7)
>     at /usr/include/g++/bits/stl_tree.h:1320
> #1  0x000000000016bba4 in std::map<void*, MallocBlockInfo,  
> std::less<void*>, std::allocator<std::pair<void* const,  
> MallocBlockInfo> > >::lower_bound(void* const&)  
> (this=0x30ffffffffffffdf, __x=@0xe0ffffffffffffa7)
>     at /usr/include/g++/bits/stl_map.h:508
> #2  0x000000000016ba28 in std::map<void*, MallocBlockInfo,  
> std::less<void*>, std::allocator<std::pair<void* const,  
> MallocBlockInfo> > >::operator[](void* const&) (this=0xffffffffffffa8,  
> __k=@0x30ffffffffffffdf)
>     at /usr/include/g++/bits/stl_map.h:316
>
> My C++ is very rusty, so I'm afraid I won't be much use here ...


Well it looks to me like the compiler is generating bad code -- the  
error is deep in the STL, which is nothing at all to do with me.

I wonder if you're using the 2.95.x STL with the 3.x compiler?

Is there a test suite for g++ you can try out to see if your install is  
OK?

Ben