(ddd.info)Continuing Somewhere Else

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6.6 Continuing at a Different Address
=====================================

Ordinarily, when you continue your program, you do so at the place where
it stopped.  You can instead continue at an address of your own
choosing.

   The most common occasion to use this feature is to back up--perhaps
with more breakpoints set-over a portion of a program that has already
executed, in order to examine its execution in more detail.

   To set the execution position to the current location, use `Set
Execution Position' from the breakpoint popup menu.  This item is also
accessible by pressing and holding the `Break/Clear' button.(1)

   As a quicker alternative, you can also press _mouse button 1_ on the
arrow and drag it to a different location.(2)

   Moving the execution position does not change the current stack
frame, or the stack pointer, or the contents of any memory location or
any register other than the program counter.

   Some inferior debuggers (notably GDB) allow you to set the new
execution position into a different function from the one currently
executing.  This may lead to bizarre results if the two functions
expect different patterns of arguments or of local variables.  For this
reason, moving the execution position requests confirmation if the
specified line is not in the function currently executing.

   After moving the execution position, click on `Continue' to resume
execution.

   ---------- Footnotes ----------

   (1) JDB, `pydb', Perl, and Bash do not support altering the
execution position.

   (2) When glyphs are disabled (Note: Customizing Source), dragging
the execution position is not possible.  Set the execution position
explicitly instead.