Is this a memory address?
I a开发者_运维百科m learning gdb, and I got my first error. This was the error:
0x00007fff83074096 in __kill ()
Is the address:
0x00007fff83074096
... a memory address in Hex format? I've converted it to decimal, out of interest, and the number is huge. I fail to believe that so many memory addresses exist.
If you are running on a 64-bit platform, then yes, addresses that large exist. (See also: http://en.wikipedia.org/wiki/Virtual_address.)
Of course, it's possible that you simply have a buffer overflow somewhere, which has corrupted your stack, and overwritten the address with nonsense.
Yup. It is.
It is an address in a 64 bit process's virtual memory space.
Not all of the addresses are in use (that's what an address is: it is a label only).
You can see more about the address by doing
:break 0x00007fff83074096
:list 0x00007fff83074096
:disassemble 0x00007fff83074096
See the whole of the stack bactkrace
:bt full
In all threads
:thread apply all bt full
Yes, it is a memory address. Due to paging, there are vastly more memory addresses available than actual memory to back the virtual address space.
You might find running pmap -x 1
or pmap -x $$
instructive, along with looking at /proc/pid/maps
contents for different processes. (cat /proc/self/maps
is easy to run.)
16 hex digits x 4 (bits represented by one hex digit) = 64 bits. You're using a 64 bit platform, why are you surprised?
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