(ddd.info)Backtraces

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6.7.2 Backtraces
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DDD provides a "backtrace window" showing a summary of how your program
got where it is.  It shows one line per frame, for many frames,
starting with the currently executing frame (frame zero), followed by
its caller (frame one), and on up the stack.

   To enable the backtrace window, select `Status => Backtrace'.

   Using GDB, each line in the backtrace shows the frame number and the
function name.  The program counter value is also shown--unless you use
the GDB command `set print address off'.  The backtrace also shows the
source file name and line number, as well as the arguments to the
function.  The program counter value is omitted if it is at the
beginning of the code for that line number.