Question

I’m developing a game and when I do a specific action in the game, it crashes.
So I went debugging and I saw my application crashed at simple C++ statements like if, return, … Each time when I re-run, it crashes randomly at one of 3 lines and it never succeeds.

line 1:

if (dynamic) { ... } // dynamic is a bool member of my class

line 2:

return m_Fixture; // a line of the Box2D physical engine. m_Fixture is a pointer.

line 3:

return m_Density; // The body of a simple getter for an integer.

I get no errors from the app nor the OS…

Are there hints, tips or tricks to debug more efficient and get known what is going on?

_{That’s why I love Java…}

Thanks

Answer 1

Random crashes like this are usually caused by stack corruption, since these are branching instructions and thus are sensitive to the condition of the stack. These are somewhat hard to track down, but you should run valgrind and examine the call stack on each crash to try and identify common functions that might be the root cause of the error.