print-trace

#!/usr/bin/env python
import struct
import sys
import subprocess

trace_entry = struct.Struct("@LLL")

def usage():
    print >>sys.stdout, "Usage: %s trace.out prog" % (sys.argv[0],)

def main(args):
    if len(args) < 2:
        usage()
        sys.exit(1)

    trace_file = args[0]
    exe        = args[1]
    f = open(trace_file, 'r')
    spc = ''

    p = subprocess.Popen(['addr2line', '-f', '-e', exe],
                         stdin=subprocess.PIPE,
                         stdout=subprocess.PIPE)

    while True:
        buf = f.read(trace_entry.size)
        if len(buf) < trace_entry.size:
            break
        (ip, s, us) = trace_entry.unpack(buf)
        is_entry = (ip & 1)
        ip = ip >> 1

        p.stdin.write("0x%x\n" % (ip,))
        fn = p.stdout.readline()
        line = p.stdout.readline()

        if not is_entry:
            spc = spc[:-1]

        print "[%d.%06d]%s%c %s (0x%x)" % (
            s, us, spc, ">" if is_entry else "<",
            fn.strip(), ip)

        if is_entry:
            spc += ' '

if __name__ == '__main__':
    sys.exit(main(sys.argv[1:]))