Is it possible to use the terminal malloc_history when debugging on a iPhone device?

I've found malloc_history useful when testing on the iOS simulator, is it possible to configure it for a physical device (iPhone 4).

On the console I do get similar messages to this

warning: Unable to read symbols for /Developer/Platforms/iPhoneOS.platform/DeviceSupport/4.2.1 (8C148)/Symbols/Developer/usr/lib/libXcodeDebuggerSupport.dylib (file not found).

Do I need to setup this file somewhere?

On the terminal I get this

malloc_history cannot examine process xxxx because the process does not exist.

Any 开发者_高级运维direct advice / pointers to documentation would be greatly appreciated.

Thanks

Try to fire up Instruments and use "Allocations".