test/py/u_boot_console_sandbox.py

   1 # Copyright (c) 2015 Stephen Warren
   2 # Copyright (c) 2015-2016, NVIDIA CORPORATION. All rights reserved.
   3 #
   4 # SPDX-License-Identifier: GPL-2.0
   5
   6 # Logic to interact with the sandbox port of U-Boot, running as a sub-process.
   7
   8 import time
   9 from u_boot_spawn import Spawn
  10 from u_boot_console_base import ConsoleBase
  11
  12 class ConsoleSandbox(ConsoleBase):
  13     """Represents a connection to a sandbox U-Boot console, executed as a sub-
  14     process."""
  15
  16     def __init__(self, log, config):
  17         """Initialize a U-Boot console connection.
  18
  19         Args:
  20             log: A multiplexed_log.Logfile instance.
  21             config: A "configuration" object as defined in conftest.py.
  22
  23         Returns:
  24             Nothing.
  25         """
  26
  27         super(ConsoleSandbox, self).__init__(log, config, max_fifo_fill=1024)
  28
  29     def get_spawn(self):
  30         """Connect to a fresh U-Boot instance.
  31
  32         A new sandbox process is created, so that U-Boot begins running from
  33         scratch.
  34
  35         Args:
  36             None.
  37
  38         Returns:
  39             A u_boot_spawn.Spawn object that is attached to U-Boot.
  40         """
  41
  42         bcfg = self.config.buildconfig
  43         config_spl = bcfg.get('config_spl', 'n') == 'y'
  44         fname = '/spl/u-boot-spl' if config_spl else '/u-boot'
  45         print fname
  46         cmd = []
  47         if self.config.gdbserver:
  48             cmd += ['gdbserver', self.config.gdbserver]
  49         cmd += [
  50             self.config.build_dir + fname,
  51             '-v',
  52             '-d',
  53             self.config.dtb
  54         ]
  55         return Spawn(cmd, cwd=self.config.source_dir)
  56
  57     def kill(self, sig):
  58         """Send a specific Unix signal to the sandbox process.
  59
  60         Args:
  61             sig: The Unix signal to send to the process.
  62
  63         Returns:
  64             Nothing.
  65         """
  66
  67         self.log.action('kill %d' % sig)
  68         self.p.kill(sig)
  69
  70     def validate_exited(self):
  71         """Determine whether the sandbox process has exited.
  72
  73         If required, this function waits a reasonable time for the process to
  74         exit.
  75
  76         Args:
  77             None.
  78
  79         Returns:
  80             Boolean indicating whether the process has exited.
  81         """
  82
  83         p = self.p
  84         self.p = None
  85         for i in xrange(100):
  86             ret = not p.isalive()
  87             if ret:
  88                 break
  89             time.sleep(0.1)
  90         p.close()
  91         return ret