Re: GDB's breakpoint internals

Daniel Jacobowitz
2003-03-26T00:35:40Z

On Tue, Mar 25, 2003 at 07:31:27PM -0500, Andrew Cagney wrote:
> (Put simply, the things you learn when reading a book explaining how a
> debugger should work :-)
>
> The `How Debuggers Work' [rosenberg] book describes a breakpoint
> implementation broken into two parts:
>
> - high level user breakpoint list
> This is what the user sees. One entry corresponds to each `break XXX'
> command. That high level breakpoint then maps onto 1 or more ...
>
> - low level physical breakpoints (or watchpoints or ...)
> One entry per physical breakpoint. When a breakpoint is hit, a reverse
> map back to each high-level breakpoint for the event is done, and then
> that breakpoint's handler is called.
>
> I might be mistaken, but I don't think GDB implemented things this way.
> Instead, it has a single tangled table.

Yes. If someone volunteers to do something about it...

--
Daniel Jacobowitz
MontaVista Software Debian GNU/Linux Developer