Re: Memory leaks in Magick++ ???

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On Thu, 27 Feb 2020, 10bxjfhf wrote:
>
> D:\pkg\C++\MSVC2019\GM\gm-c031-d3ed\magick\memory.c(241) : {447928} normal 
> block at 0x07DDE698, 135 bytes long.
>
>  Data: <                > CD CD CD CD CD CD CD CD CD CD CD CD CD CD CD CD
>
> D:\pkg\C++\MSVC2019\GM\gm-c031-d3ed\magick\memory.c(241) : {213797} normal 
> block at 0x07DDEAE8, 135 bytes long.
>
>  Data: <                > CD CD CD CD CD CD CD CD CD CD CD CD CD CD CD CD

These memory allocations are made via Windows-specific 
_aligned_malloc() which allocates alligned memory.  Such allocations 
are then deallocated using _aligned_free() (at line 574 of 
magick/memory.c).  Does your memory-leak checking framework handle 
memory allocations using _aligned_malloc()/_aligned_free()?

I always found it interesting that the original Unix memalign() 
function did not indicate that the returned pointer could be 
deallocated using free().  This means that it was only safe to leak 
memory allocated using memalign().  Luckily posix_memalign() does not 
have this problem.

Bob
-- 
Bob Friesenhahn
[email protected], http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/
Public Key,     http://www.simplesystems.org/users/bfriesen/public-key.txt
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