linux-kernel-module-cheat/trace2line

#!/usr/bin/env python3

'''
TODO port this to Python fully. I started it, but then it was hanging on some
IO blocking annoyance in the pipeline, and I don't have the time to deal with
it, so I'm just going to forward the common options to the old shell script for
now...
'''

import os

import common
import lkmc.import_path
from shell_helpers import LF

class Main(common.LkmcCliFunction):
    def __init__(self):
        super().__init__(
            defaults = {
                'show_time': False,
            },
            description='''\
Convert an execution trace containing PC values into the Linux kernel lines executed.
''',
        )

    def timed_main(self):
        self.sh.run_cmd([
            os.path.join(self.env['root_dir'], 'trace2line.sh'), LF,
            'true' if self.env['emulator'] == 'gem5' else 'false', LF,
            self.env['trace_txt_file'], LF,
            self.get_toolchain_tool('addr2line'), LF,
            self.env['vmlinux'], LF,
            self.env['run_dir'], LF,
        ])

if __name__ == '__main__':
    Main().cli()

# This was the old full Python port attempt that was failing:

# import subprocess
# import sys

# if kwargs['emulator'] == 'gem5':
#     def get_pc(line):
#         # TODO
#         # stdin = sed -r 's/^.* (0x[^. ]*)[. ].*/\1/' "$common_trace_txt_file")
#         pass
# else:
#     def get_pc(line):
#         return line.split('=')[-1]
# with \
#         subprocess.Popen(
#             [
#                 self.get_toolchain_tool('addr2line'),
#                 '-e',
#                 kwargs['vmlinux'],
#                 '-f',
#                 '-p',
#             ],
#             stdout=subprocess.PIPE,
#             stdin=subprocess.PIPE,
#         ) as proc, \
#         open(kwargs['trace_txt_file'], 'r') as infile, \
#         open(os.path.join(kwargs['run_dir'], 'trace-lines.txt'), 'w') as outfile \
#     :
#     for in_line in infile:
#         proc.stdin.write(get_pc(in_line).encode())
#         proc.stdin.flush()
#         stdout = proc.stdout.read()
#         outfile.write(stdout.decode())
#     # TODO
#     # sed -E "s|at ${kwargs['linux_build_dir']}/(\./\|)||"
#     # uniq -c