stack.py

import fileinput
import re

r = re.compile('^\s*\d+\s*([^\s]+)')
rsp_r = re.compile('rsp\s=\s(0x[a-f0-9]+)')

prev_fn = None
this_fn = None
prev_rsp = None
for line in fileinput.input():
    m = r.match(line)
    if m:
        prev_fn = this_fn
        this_fn = m.group(1)
    else:
        m = rsp_r.search(line)
        if m:
            rsp = int(m.group(1), 16)
            if prev_rsp is not None:
                size = rsp - prev_rsp
                print '%d %s' % (size, prev_fn)
                prev_fn = this_fn
            prev_rsp = rsp