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Nick Roberts writes:The IDE is responsible for removing & reinserting breakpoints at the correct line numbers. If you had a breakpoint on main.c:35 and you added a couple of lines of code earlier in the file, that breakpoint needs to be moved to main.c:37.
Quite apart from fix and continue, it would be useful when GDB realises that
an executable has been recompiled and says:
`myprog' has changed; re-reading symbols.
if it could also compute and print the new breakpoint locations, possibly
only in MI as an event notification ("=breakpoints-changed").
I was thinking that GDB could detect that the location had changed but maybe
(as Jason suggests the IDE should do it (certainly if the edit source in Emacs
the breakpoint icon moves with it's associated line). In which case it would
seem useful to have an MI command that could move an existing breakpoint, e.g.,
-break-insert -m BPTNO FILE:LINE
rather than delete the existing breakpoint and create a new one so that the
breakpoint number is preserved. If the example above is breakpoint 4:
-break-insert -m 4 main.c:37
Perhaps Apple GDB already does something like this.
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