Code obfuscation results in memory leaks reported by Valgrind, AddressSanitizer
Submitted by Zoltán Böszörményi
Assigned to fon..@..op.org
Fontconfig uses pointer arithmetics to compute the distance from an object base pointer to a member structure and the result is stored in intptr_t type members.
This causes reported memory leaks in fontconfig in applications compiled with GCC's AddressSanitizer and Valgrind, too.
The fact that the size of intptr_t always equals to the size of a pointer makes this whole thing look like code obfuscation.
It also slows down the code slightly. Pointer arithmetics and storing the result is always slower than just storing the pointer value.
The amount of reported memory leaks in AddressSanitizer is so much that it makes genuine debugging hard, like searching for a needle in a haystack.
Please, use real pointers instead of intptr_t.