What's the principle of ollydbg's memory breakpoint ?

Question

It seems only 1 memory breakpoint can be set, and it seems doesn't matter at which line the memory breakpoint is set,very weird,anyone can explain?

Answer 1

OllyDbg use int 3 to set the breakpoints, and you can set as many breakpoints as you want.

Check if you're really defining breakpoints in the code segment, not in data.