When using x/100c, the output shows the both ascii and decimal.
0x111111: 40 '(' 40 '('
How can gdb show the ascii and hex at the same time ?
like
0x111111: 0x28 'C' 0x28 'C'
This format is better:
0x111111: 0x28 0x28 ... 'CC...'
When using x/100c, the output shows the both ascii and decimal.
0x111111: 40 '(' 40 '('
How can gdb show the ascii and hex at the same time ?
like
0x111111: 0x28 'C' 0x28 'C'
This format is better:
0x111111: 0x28 0x28 ... 'CC...'
You can do this with a macro. Iterate through the characters, and call appropriate printfs.
define xac
dont-repeat
set $addr = (char *)($arg0)
set $endaddr = $addr + $arg1
while $addr < $endaddr
printf "%p: ", $addr
set $lineendaddr = $addr + 8
if $lineendaddr > $endaddr
set $lineendaddr = $endaddr
end
set $a = $addr
while $a < $lineendaddr
printf "0x%02x ", *(unsigned char *)$a
set $a++
end
printf "'"
set $a = $addr
while $a < $lineendaddr
printf "%c", *(char *)$a
set $a++
end
printf "'\n"
set $addr = $addr + 8
end
end
document xac
usage: xac address count
end
$ gdb co2
(gdb) list
1 #include <stdlib.h>
2 #include <stdio.h>
3
4 main()
5 {
6 char cmd[50];
7
8 sprintf(cmd, "cat /proc/%d/maps", getpid());
9 system(cmd);
10 }
(gdb) break 9
Breakpoint 1 at 0x400666: file co2.c, line 9.
(gdb) run
Breakpoint 1, main () at co2.c:9
9 system(cmd);
(gdb) xac cmd 20
0x7fffffffe110: 0x63 0x61 0x74 0x20 0x2f 0x70 0x72 0x6f 'cat /pro'
0x7fffffffe118: 0x63 0x2f 0x32 0x30 0x37 0x37 0x38 0x2f 'c/20778/'
0x7fffffffe120: 0x6d 0x61 0x70 0x73 'maps'
Unfortunately there is no built-in way. I think that would be a nice addition to gdb.
Meanwhile, you can roll your own by writing a new dumping command in Python. I think this would not be very hard.