[ESS] [OT] Enabled a hook and no longer find which

Stephen Berman @tephen@berm@n @end|ng |rom gmx@net
Tue Aug 3 00:48:04 CEST 2021

On Mon, 2 Aug 2021 17:35:09 -0500 Dirk Eddelbuettel via ESS-help <ess-help using r-project.org> wrote:

> On 2 August 2021 at 17:20, Dirk Eddelbuettel via ESS-help wrote:
> |
> | On 2 August 2021 at 23:56, Stephen Berman wrote:
> | | Did you also try the more direct alternative of grepping simply for
> | | "GPATH", "GTAGS", "GRTAGS"?  Presumably whatever function updates these
> | | files has to refer to them, either directly by name or indirectly by a
> | | variable or function that in turn refers to them directly or indirectly.
> | | So it should be possible to find the update function by inspecting all
> | | code that uses these file names (directly or indirectly).
> |
> | They are only written by a tool named gtags which is a binary that comes with
> | GNU global. I even tried to be craft and 'shadow' /usr/bin/gtags with a
> | (name-name) shell script leaving a timestamp in /tmp before calling
> | /usr/bin/gtags but that left no traces either.
> |
> | But in one of the instrumented repos, as soon as I updated files src/ the
> | files GTAGS and GRTAGS.  It works so magically I feel tempted to use the
> | trick for other purposes but I no longer know the trick <man_face_palming>.
> Sorry, missed one part of your question here:  so yes, no trace of either
> gtags or GPATH or GTAGS or GRTAGS in any of the few .el files in my ~ (and as
> an elisp noob I would not write anywhere else).  So still a puzzle.

Maybe you could use gdb with a breakpoint on a suitable function (or
just main()) in gtags.c (assuming you have the source) and try stepping
through the call chain.

Steve Berman

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