Debugging

bug - is a mistake or omission in program code that leads to errors when the program runs

debugging - refers to the process of locating and correcting a bug

interactive debugger - software tool designed to help located bugs

dynamic check - checks for undefined behavour

Undefined bugs

undefined behaviour - when certain uses of code shouldn't be done, like: arr[arr.size() + 1] here anything can happen (probs a crash or the program will continue with bad data)

segmentation fault (core dumped) - caused by accessing memory outside the allocated space for the program

Bugs can depend on:

1. OS used

2. compiler used, with options

3. whats happened in the program so far

Assertions Lib

content in the page below

Using the compiler for undefined behaviour detection

Main

int main() 
{
	vector<int> v = {0,1,2,3,4};

	v[5] = 5; // undefined behavour, out of range
}

Flag

$ g++ -D_GLIBCXX_DEBUG main.cpp
// returns any undefined behavour