[Enigma-devel] leak hunting - report

[Petr Machata]

Today I kind-of finished leak hunting in Enigma code. My goal was to 
eliminate all leaks reported by Valgrind 1.9.4.

I wasn't able to remove all leaks. Valgrind claims that there are 
currenly some 250 KB leaked, and this leak occurs even if all you do is 
enter the game and exit immediately. If you play the game, even more 
memory disappears, up to 400 KB total. This is not *that* bad, remember 
that it was a lot more than a meg at the beginning. Yet it's a leak and 
leaks don't help.

I have absolutely no idea how is this possible. I went through whole 
code and found for each new it's corresponding delete. I placed logs to 
constructors and destructors, comparing amount of each. I found some 
leaks, that were not reported by Valgrind (plus one false alarm), but I 
wasn't able to remove reported leak. I don't know. Maybe there is bug in 
Valgrind, maybe there is a bug in libstdc++, possibly I just didn't look 
hard enough. Probably a bit of each. There are a leaks in SDL, X, LUA, 
but those are minor, a few bytes each. The major 250K-large block sticks 
hard.

By the way, Valgrinds report leaks even in this code. This is strange, 
does anyone know what is it?

        #include <string>
        int main() {
            std::string R = "hi!";
        }

Petr Machata