On 04/03/2014 07:25 PM, Ilya Verbin wrote:
Yes, initially the idea was to use it for look up the right function. But now each DSO will call GOMP_offload_register, and pass unique pointer to __OPENMP_TARGET__ (host_table) for this DSO. Then gomp_register_images_for_device registers all this host tables in the plugin. And when libgomp calls device_get_table_func, the plugin returns the joint table for all DSO's.
Why make a joint table? It seems better to use the __OPENMP_TARGET__ symbol to restrict lookups to the subset of symbols that could actually be found. BTW, I still expect that the lookup by ordering will turn out to be fundamentally unreliable and we'll need to use the unique id patch I posted a while ago. In that case using __OPENMP_TARGET__ as a first order key for the lookups eliminates any problem with duplicate names across multiple libraries.
Bernd
