Heres is the URL to a malloc library I have found, that seems to provide
all the basic features necessary, is very fast (bin/circle -c without
library took 20 seconds, with library and some basic options took 26
seconds - on a P2/233 w/ Intel-LX board). Memory usage was not
excessive, in fact, it didn't seem to use much extra memory at all (when
I say "extra" if the memory usage goes to 1.5x normal, I complain).
Admittedly it doesn't use any fancy memory protection schemes to catch
overruns (the only library I found that does that is Electric Fence, but
it also results in memory usage up to 10-20x normal, and slowdowns to
1/10th normal speed during bootup)
http://www.letters.com/dmalloc/
Sample debug output (with about 3 of the MANY options enabled), logged to
a file of your choice:
70359: Dmalloc version '3.3.0'. UN-LICENSED copy.
70359: dmalloc_logfile 'dmalloc.log': flags = 0x403, addr = 0
70359: starting time = 881768332
70359: free count/bits: 79/4 115/5 19/6 20/7 1/8 3/9 2/10 1/11
70359: basic-block 4096 bytes, alignment 8 bytes, heap grows up
70359: heap: 0x8104000 to 0x8712000, size 6348800 bytes (1550 blocks),
checked 0
70359: alloc calls: malloc 1130, realloc 1, calloc 68536, free 692
70359: total memory allocated: 4419963 bytes (69667 pnts)
70359: max in use at one time: 4080860 bytes (68977 pnts)
70359: max alloced with 1 call: 498900 bytes
70359: max alloc rounding loss: 1192740 bytes (22%)
70359: max memory space wasted: 0 bytes (0%)
70359: final user memory space: basic 282, divided 1009, 4095262 bytes
70359: final admin overhead: basic 7, divided 252, 1060864 bytes (16%)
70359: final external space: 0 bytes (0 blocks)
70359: unknown memory not freed: 68974 pointers, 3252966 bytes
70359: ending time = 881768368, elapsed since start = 0:0:36
Looks very good, has MANY MANY options. I'll use it a bit and report.
- Chris Jacobson
PS: Found it doing a Yahoo search for "malloc"
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