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README for Memory Allocation Debugging
If it is necessary or desired to debug the memory allocation
process in LZMA, edit the file C/Alloc.c and uncomment the
line:
/* #define _SZ_ALLOC_DEBUG */
Then, add this to the Makefile and relink. This output will
show chunks of memory Alloc uses during LZMA compression.
Output will appear similar to this:
Alloc 284484 bytes, count = 0, addr = 44251008
Alloc 65536 bytes, count = 1, addr = 80636F0
Alloc 12288 bytes, count = 2, addr = 80736F8
Alloc 12288 bytes, count = 3, addr = 8076700
Alloc 4456448 bytes, count = 4, addr = 43E10008
Alloc 102877690 bytes, count = 5, addr = 3DBF3008
Alloc 604246024 bytes, count = 6, addr = 19BB1008
Free; count = 6, addr = 43E10008
Free; count = 5, addr = 19BB1008
Free; count = 4, addr = 3DBF3008
Free; count = 3, addr = 80736F8
Free; count = 2, addr = 8076700
Free; count = 1, addr = 80636F0
Free; count = 0, addr = 44251008
As you can see, LZMA takes large chunks of ram and sometimes
it can use more than what is available and return an
SZ_ERROR_MEM (2) code.
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