gdb: how to view all memory associated with struct in hex -


i have pointer struct , can print in gdb using print /x (*s).

however gives me:

..., intensity = 2 '\002'}, {distance_2cm = 3045, intensity = 3 '\003'}, {distance_2cm = 14735, intensity = 7 '\a'}, {dis tance_2cm = 3345, intensity = 3 '\003'}, {distance_2cm = 14272, intensity = 7 '\a'}, {distance_2cm = 3735, intensity = 2 '\002'}, {distance_2cm = 14617, intensity = 6 '\006'}, {distance_2cm = 4239, intensity = 2 '\002'}, {distance_2cm = 9741, intensity = 5 '\005'}, {distance_2cm = 4892, intensity = 2 '\002'}, {distance_2cm = 10686, intensity = 4 '\004' }, {distance_2cm = 6012, intensity = 3 '\003'}, {distance_2cm = 9906, intensity = 3 '\003'}}}, {head = {laser_block_id = 61183, rotational_theta = 21191}, lasers_arary = {{distance_2cm = 0, intensity = 2 '\002'}, {distance_2cm = 0, inte nsity = 1 '\001'}, {distance_2cm = 0, intensity = 3 '\003'}, {distance_2cm = 0, intensity = 1 '\001'}, {distance_2cm = 0, intensity = 2 '\002'}, {distance_2cm = 0, intensity = 2 '\002'}, {distance_2cm = 0, intensity = 1 '\001'}, {distan ce_2cm = 6426, intensity = 1 '\001'}, {distance_2cm = 2040, intensity = 3 '\003'}, {distance_2cm = 6584, intensity = 2 '\002'}, {distance_2cm = 2154, intensity = 3 '\003'}, {distance_2cm = 0, intensity = 1 '\001'}, {distance_2cm = 2282, intensity = 3 '\003'}, {distance_2cm = 0, intensity = 1 '\001'}, {distance_2cm = 2428, intensity = 2 '\002'}, {distan ce_2cm = 26580, intensity = 33 '!'}, {distance_2cm = 2592, intensity = 5 '\005'}, {distance_2cm = 27180, intensity = 2 7 '\033'}, {distance_2cm = 2795, intensity = 3 '\003'}, {distance_2cm = 0, intensity = 2 '\002'}, {distance_2cm = 3045 , intensity = 3 '\003'}, {distance_2cm = 14712, intensity = 22 '\026'}, {distance_2cm = 3342, intensity = 3 '\003'}, { distance_2cm = 14181, intensity = 7 '\a'}, {distance_2cm = 3729, intensity = 2 '\002'}, {distance_2cm = 14474, intensi ty = 6 '\006'}, {distance_2cm = 4228, intensity = 2 '\002'}, {distance_2cm = 9744, intensity = 1 '\001'}, {distance_2c m = 4887, intensity = 2 '\002'}, {distance_2cm = 13075, intensity = 7 '\a'}, {distance_2cm = 5994, intensity = 3 '\003 '}, {distance_2cm = 9947, intensity = 4 '\004'}}}, {head = {laser_block_id = 61183, rotational_theta = 21207}, lasers_ arary = {{distance_2cm = 0, intensity = 2 '\002'}, {distance_2cm = 0, intensity = 1 '\001'}, {distance_2cm = 0, intens ity = 3 '\003'}, {distance_2cm = 0, intensity = 1 '\001'}, {distance_2cm = 0, intensity = 2 '\002'}, {distance_2cm = 0 , intensity = 2 '\002'}, {distance_2cm = 0, intensity = 1 '\001'}, {distance_2cm = 0, intensity = 1 '\001'}, {distance _2cm = 2038, intensity = 6 '\006'}, {distance_2cm = 6548, intensity = 1 '\001'}, {distance_2cm = 2146, intensity = 3 ' \003'}, {distance_2cm = 0, intensity = 1 '\001'}, {distance_2cm = 2285, intensity = 3 '\003'}, {distance_2cm = 0, inte nsity = 1 '\001'}, {distance_2cm = 2428, intensity = 2 '\002'}, {distance_2cm = 26498, intensity = 33 '!'}, {distance_ 2cm = 2590, intensity = 5 '\005'}, {distance_2cm = 26177, intensity = 29 '\035'}, {distance_2cm = 2792, intensity = 3 '\003'}, {distance_2cm = 0, intensity = 2 '\002'}, {distance_2cm = 3044, intensity = 3 '\003'}, {distance_2cm = 14743, intensity = 7 '\a'}, {distance_2cm = 3344, intensity = 3 '\003'}, {distance_2cm = 14147, intensity = 7 '\a'}, {distan ce_2cm = 3728, intensity = 2 '\002'}, {distance_2cm = 14520, intensity = 13 '\r'}, {distance_2cm = 4222, intensity = 2 '\002'}, {distance_2cm = 14567, intensity = 5 '\005'}, {distance_2cm = 4885, intensity = 3 '\003'}, {distance_2cm = 1 0842, intensity = 6 '\006'}, {distance_2cm = 5978, intensity = 3 '\003'}, {distance_2cm = 9964, intensity = 6 '\006'}} }}}, sd = {gps_time_stamp = 59467414, status_type = 55 '7', status_value = 33 '!'}}

i want view in hex, hypothetical output below:

00000000: 2369 6e63 6c75 6465 203c 6368 6563 6b2e 00000010: 683e 0a0a 2369 6e63 6c75 6465 2022 635f 00000020: 7665 6c6f 6479 6e65 2f61 7267 7061 7273 00000030: 652e 6822 0a23 696e 636c 7564 6520 2263

is there way gdb?

this can done x command. simplest way first find size of structure, , pass argument x. like:

(gdb) print sizeof(whatever) $1 = 1024 (gdb) x/512xh &whatever

decoding x/512xh:

  • 512 repeat count, here half size of structure, because example showed 2 bytes per word;
  • x means print in hex;
  • h means "halfword", aka 2 bytes.

the gdb manual explains flags can used here.

you can in fancier way using eval compute length you. if you're doing lot suggest perhaps writing new command in python bit of processing , invokes x.


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