----- Original Message ----- > > > ----- Original Message ----- > > Hi, > > > > I often find myself dumping a bunch of addresses to files to iterate > > with 'struct_name.field < file_with_addresses', but that is horribly > > slow for large number of iterations. > > > > `help list` comment for -S vs. -s made me try to use `rd` instead, > > e.g. get offset manually from `struct -o` then use rd instead like > > `rd -o xx < addr_list | awk '{ print $2 }' > value_list` -- and that is > > infinitely better. > > > > > > Would it make sense to add a similar option to 'struct' instead so one > > could do e.g. `struct -S struct_name.field addr` instead of the dance I was > > doing? > > (That would require to cache field offset in crash and not query it > > again everytime, from a quick look at the code, but we could only cache > > one and still gain a lot for such iterations...) > > > > > > Am I missing another more practical way of doing this? > > (I guess it's not so bad now I came up with using 'rd', but that was > > non-obvious to me. My use case here involved following a couple of > > pointers from a list so I dumped the first pointer to follow from list > > with -S struct1.field1, but then the following iteration just wouldn't > > end naively) > > Dominique, > > What might make sense is to use the "struct -r" option, which does a raw > memory dump of a data structure. But for a reason I do not recall, it > prevents that option from being used with a "struct_name.field" argument. > (see line 6628 of symbols.c). But I don't see why that couldn't be made > to work, though, since the end result is simply a call to raw_data_dump(). > > Dave ...and then if you get "struct -r" to work with a "struct_name.field" argument, the next challenge would be the caching aspect of your request. Currently there's no manner in which command-specific information is cached beyond the execution of a single command. With "< file", the command gets executed from scratch each time. Dave -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/crash-utility