How to convert a address to specific type variable in GDB?

Question

I got an address such as 0x7fc9e401a02a in my log file, and I know that this address is a pointer of type Connection.

Then I start GDB, what I wanna know is: how to convert this address to a temporary variable of type Connection*, and display relevant information of Connection*?

How to do this, any hints?

Try this: print *(Connection*)0x7fc9e401a02a. This assumes that your address is from a core file that your looking at in gdb. If that address is from a run of your code, it will certainly not exist without re-running the code inside gdb. — JaredC
– JaredC, Commented Jan 9, 2013 at 3:31
If object still exists on stack/heap and program is still running, just attach (attach PID) to process, and you should be able to do what JaredC writes. — dbrank0
– dbrank0, Commented Jan 9, 2013 at 8:10

tsing · Accepted Answer · 2013-01-09 13:27:09Z

7

Because my Connection class has a namespace, so what I should do is as bellow:

print * ('MyNameSpace::Connection' *) 0x7fc9e401a02a

Thanks JaredC and dbrank0 for your answers.

answered Jan 9, 2013 at 13:27

tsing

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