62766Re: racket (:mz) SEGV's vim
- Oct 5, 2011Please find attached a patch for the following issue:
:mzscheme could be invoked before the mzscheme/racket libraries were
initialised, e.g. in startup scripts and on the command line.
Therefore the following would SEGV:
vim +':mz 1'
works when editing a file.
mzscheme expects to be invoked by a "trampoline" that wraps around the
main() of the embedding environment -- and this trampoline is around
exe_pre_commands() and source_startup_scripts() are outside the scope
of the trampoline.
This patch causes main() to be called in two parts. The first part
sets up vim's environment and globals, but does not execute any vim
commands (as far as I can tell). It then calls to mzscheme_init, which
eventually recurs into main(); which skips the initialisation, and
proceeds with anything that may perform commands.
* I pass fname and params between invocations of main() through the
static variables save_mz_fname and save_mz_params. There is
justification at the top of main() for doing so. I'm not so keen on
statics, myself -- so I've not re-declared fname and params
* The other option would be to split main into two parts -- an
"initialisation" and a "commands" part. Then start up vim with:
calls mzscheme_init(argc, argv, fname, params)
calls ... main_part2(argc, argv, fname, params)
[or, in the case of !FEAT_MZSCHEME: main(argc,argv) calls
main_part2(argc, argv, fname, params)]
I think I've done enough in main already! And, unless there is more
general merit in such a refactoring, this is as much disruption as I
need to cause :-)
Thanks Sergey and Bram for your help!
| Tim Brown <tim.brown@...> | M:+44(0)7771714159 | H:01372747875 |
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