METHOD AND SYSTEM FOR DEBUGGING A PROGRAM IN A MULTI-THREAD ENVIRONMENT

A method and system for debugging a program in multithread environment which interrupts the running of a debuggee program begins by replacing the instruction at the position at which a breakpoint for debugging is desired to be set with a breakpoint instruction. When the breakpoint instruction is replaced back with the instruction at the position at which the breakpoint for debugging is set, an instruction is set in front of the breakpoint for debugging as a fence breakpoint; and when the instruction at the position at which the breakpoint for debugging is set, is replaced again with the breakpoint instruction. On completion, the fence breakpoint is replaced with the original instruction of the debuggee program at that position.