How to measure enclave’s memory consumption on Intel SGX

Make sure you have sgx-gdb installed on your machine. Run: $ sgx-gdb --version to check it.
Create a .gdbinit file in your project directory.

Paste this into the file:

# enable SGX memory measurement tool
enable sgx_emmt

# exit GDB after successfull execution
set $_exitcode = -999
define hook-stop
  if $_exitcode != -999
    quit
  end 
end

In your global gdbinit file (in my case, ~/.gdbinit) paste these lines:

set auto-load local-gdbinit on
add-auto-load-safe-path /path/to/project/.gdbinit

In your application, make sure you are destroying the enclave using sgx_destroy_enclave(const sgx_enclave_id_t enclave_id).
Run your SGX program using SGX-GDB:
```
$ sgx-gdb -ex=r --args your_executable arg1 arg2
```
what it means:
ex=r - tells GDB to run the program immediately
--args - everything that follows it is a command and its args

You could set an alias for this command to make it even smoother.

In the output you will now find the memory usage, e.g.,

[Peak stack used]: 14 KB
[Peak heap used]:  67764 KB
[Peak reserved memory used]:  0 KB