gdb command to get the virtual memory page's permissions for a given address

Question

Is there a command in gdb that will allow me to see if the memory page where my app crashed has Read/Write/Execute permissions?

Basically what I want is something like when I'm entering:

gdb:> addrinfo 0x12345678

And I get:

address 0x12345678 is in range ....
which is occupied by executable image (if any)...../my-lib.so
vm page permsissions: RWX

Thanks!

Answer 1

You can find this info in "/proc/'pid_of_your_app'/maps" file. Please check Understanding Linux /proc/id/maps for more info.

If you often need to lookup addresses in maps file, you can write a small script to do this...