[Crash-utility] [PATCH] add -s option for struct command

Hello Dave, The patch attached with this mail is to add "-s" option for struct command. The output is like below. crash> page.private,_mapcount.counter,lru.next -s ffffea0000000850 0 -1 0xffffea0000000878 crash> page.private,_mapcount.counter,lru.next -s ffffea0000000850 -h 0x0 0xffffffff 0xffffea0000000878 There are three features provided by the patches. 1. the data can be output in one line, easier to be parsed 2. it is extremly faster than original struct command and print command. When using command like "struct xxx.yyy -s < address_list", if there are lots of addresses in the file, address_list, the original struct command will spend several minutes and even several hours. But the patch will reduce the time to several seconds. 3. submember can also be output, like "_mapcount.counter" int the above example P.S. The first patch is used to modified gdb. It add a command called "printm", which can output the relative information of a struct's member. -- -- Regards Qiao Nuohan