mire segfaulthoz ert nekem pont akkora lett a heap:
cat /proc/16716/maps
00400000-00401000 r-xp 00000000 00:11 256836 /tmp/test
00600000-00601000 rw-p 00000000 00:11 256836 /tmp/test
00601000-00622000 rw-p 00000000 00:00 0 [heap]
7ffff7a33000-7ffff7bd2000 r-xp 00000000 08:22 5183 /lib/x86_64-linux-gnu/libc-2.19.so
7ffff7bd2000-7ffff7dd2000 ---p 0019f000 08:22 5183 /lib/x86_64-linux-gnu/libc-2.19.so
...
0x622000 - 0x601000 = 0x21000 = 135168
szoval minden kerek.