Plugins & GGC ie GTY

[Basile STARYNKEVITCH <basile@starynkevitch.net>]

Hello All,

[I don't know if this discussion belongs to gcc@ or gcc-patches@ so I'm 
sending it on gcc@ since I don't propose or discuss any code yet]

My understanding was that most plugins people are aware that somehow 
some plugins would need to have static GTY-ed roots for the GGC machinery.

So it seems to me that we'll need :

1. The ability to run gengtype in a special mode for plugins, on the 
source code of the plugin. to generate the gt-*.h files included by the 
source code of the plugin. This would require a patch to gengtype.

2. The ability to handle, very probably using dlsym, or perhaps by 
having a gcc_plugin_register_gty_table function called from the plugin 
initialization routine, to plug the generated root tables (an array of 
struct ggc_root_tab, which is defined in the generated gt-*.h files) of 
the plugin into the GGC machinery. This would require a short patch to 
ggc-common.c or similar ggc-*.c files.

Did I miss anything?

Regards.



PS. This is not an April Fool joke! I am quit serious about extra GTY-ed 
roots. It is for me an essential & required condition to perhaps 
transform the MELT branch into a mega-plugin.


-- 
Basile STARYNKEVITCH         http://starynkevitch.net/Basile/
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