3.2.5. Using GDB breakpoints to stop execution at defined code locations

Procedure

• To place a breakpoint.

  1. Specify the name of the source code file and the line in that file:

     (gdb) br file:line

  2. When file is not present, name of the source file at the current point of execution is used:

     (gdb) br line

  3. Alternatively, use a function name to put the breakpoint on its start:

     (gdb) br function_name

  4. A program might encounter an error after a certain number of iterations of a task. To specify an additional condition to halt execution:

     (gdb) br file:line if condition

     Replace condition with a condition in the C or C++ language. The placeholders file and line match the syntax shown in the first breakpoint step in this procedure.

• To inspect the status of all breakpoints and watchpoints:

  (gdb) info br

• To remove a breakpoint by using its number as displayed in the output of info br:

  (gdb) delete number

• To remove a breakpoint at a given location:

  (gdb) clear file:line