| run | Start debugged program. |
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| break | Set breakpoint at specified location. |
| next | Step program, proceeding through subroutine calls. |
| list | List specified function or line. |
| print | Print value of expression EXP. |
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| up | Select and print stack frame that called this one. |
| down | Select and print stack frame called by this one. |
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| display | Print value of expression EXP each time the program stops. |
| undisplay | Cancel some expressions to be displayed when program stops. |
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| backtrace | Print backtrace of all stack frames, or innermost COUNT frames. |
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| step | Step program until it reaches a different source line. |
| continue | Continue program being debugged, after signal or breakpoint. |
| finish | Execute until selected stack frame returns. |
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| watch | Set a watchpoint for an expression. |
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| info breakpoints | Status of specified breakpoints (all user-settable breakpoints if no argument). |
| delete breakpoints | Delete all or some breakpoints or auto-display expressions. |
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| whatis | Print data type of expression EXP. |
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| target record-full | Log program while executing and replay execution from log. |
| reverse-next | Step program backward, proceeding through subroutine calls. |
| set var | Evaluate expression EXP and assign result to variable VAR. |