Support for memory leak detection

(counts pending allocations as function of their location in the source, allows to specify a time interval)

'make config' allows you to specify that you want memory leak detection. This uses some extra CPU - but I did speed up the RunMalloc code to allow using this on most production servers (!). If you specify 'y' to all features (MEMMAGICNUMS, MEMSIZESTATS, MEMLEAKSTATS, MEMTIMESTATS) then a formatted output of /stats M [server timeoffset1 timeoffset2] will look like:

009 Total allocated memory: 9368752 bytes in 158328 blocks.
*** Memory allocated between 872801625 (server start + 3600 s) and 872841978   
    (now - 14400 s):
*** Blocks     Bytes      Location
010 1064       21280      list.c:290
010 1          12         list.c:308
010 8262       132192     userload.c:71
010 404        10172      channel.c:331
010 404        3456       channel.c:333
010 187        37400      list.c:97
010 699        16908      res.c:610
010 1          2036       dbuf.c:103
010 2          60         s_user.c:2665
010 30         1228       s_user.c:2667
010 26         832        channel.c:3951
010 699        27960      res.c:1140
010 699        5592       res.c:1151
010 4          120        res.c:639
010 699        2796       res.c:1154
010 186        20832      list.c:140
010 22         528        list.c:401
010 22         440        list.c:402
010 699        2812       res.c:1171
010 22         2644       list.c:403
010 22         108        list.c:404
010 1          56         list.c:159
010 1          4096       numnicks.c:191
010 71         18104      channel.c:1987

Questions and comments about this page should go to the maintainer: Carlo Wood (Run @ IRC).