Valgrind is a virtual machine that uses just-in-time compilation to translate programs into an intermediate representation before executing them, allowing tools to transform the representation to debug programs by detecting memory leaks and other errors without directly running the original code.

1. Valgrind

2. Valgrind
● Valgrind is a virtual machine using just-in-time (JIT)
compilation techniques, including dynamic recompilation.
● Nothing from the original program ever gets run directly
on the host processor.
● Instead, Valgrind first translates the program into a
temporary, simpler form called Intermediate
Representation (IR), which is a processor-neutral, SSA-
based form.
● After the conversion, a tool is free to do whatever
transformations it would like on the IR, before Valgrind
translates the IR back into machine code and lets the
host processor run it.

3. Debugging Demo: Compilation OK

4. Debugging Demo: Mem Leak

5. Debugging Demo: Mem Leak

6. Using free()

7. The ERROR as spotted by gdb

8. Solution

9. More Examples
● https://bitbucket.org/melvin_cabatuan/cprogra
mmingtour/src

10. END