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trace locationtrace command is very similar to the break command.
Its argument location can be a source line, a function name, or
an address in the target program. See Specify Location. The
trace command defines a tracepoint, which is a point in the
target program where the debugger will briefly stop, collect some
data, and then allow the program to continue. Setting a tracepoint or
changing its actions doesn't take effect until the next tstart
command, and once a trace experiment is running, further changes will
not have any effect until the next trace experiment starts.
Here are some examples of using the trace command:
(gdb) trace foo.c:121 // a source file and line number
(gdb) trace +2 // 2 lines forward
(gdb) trace my_function // first source line of function
(gdb) trace *my_function // EXACT start address of function
(gdb) trace *0x2117c4 // an address
You can abbreviate trace as tr.
trace location if condThe convenience variable $tpnum records the tracepoint number
of the most recently set tracepoint.
delete tracepoint [num]delete command can remove tracepoints also.
Examples:
(gdb) delete trace 1 2 3 // remove three tracepoints
(gdb) delete trace // remove all tracepoints
You can abbreviate this command as del tr.