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Stopping and Continuing

   The principal purposes of using a debugger are so that you can stop
your program before it terminates; or so that, if your program runs into
trouble, you can investigate and find out why.

   Inside GDB, your program may stop for any of several reasons, such as
a signal, a breakpoint, or reaching a new line after a GDB command such
as `step'.  You may then examine and change variables, set new
breakpoints or remove old ones, and then continue execution.  Usually,
the messages shown by GDB provide ample explanation of the status of
your program--but you can also explicitly request this information at
any time.

`info program'
     Display information about the status of your program: whether it is
     running or not, what process it is, and why it stopped.

* Breakpoints
Breakpoints, watchpoints, and exceptions
* Continuing and Stepping
Resuming execution
* Signals
* Thread Stops
Stopping and starting multi-thread programs

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