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- # Copyright (c) 2015 Stephen Warren
- # Copyright (c) 2015-2016, NVIDIA CORPORATION. All rights reserved.
- #
- # SPDX-License-Identifier: GPL-2.0
- # Logic to interact with the sandbox port of U-Boot, running as a sub-process.
- import time
- from u_boot_spawn import Spawn
- from u_boot_console_base import ConsoleBase
- class ConsoleSandbox(ConsoleBase):
- '''Represents a connection to a sandbox U-Boot console, executed as a sub-
- process.'''
- def __init__(self, log, config):
- '''Initialize a U-Boot console connection.
- Args:
- log: A multiplexed_log.Logfile instance.
- config: A "configuration" object as defined in conftest.py.
- Returns:
- Nothing.
- '''
- super(ConsoleSandbox, self).__init__(log, config, max_fifo_fill=1024)
- def get_spawn(self):
- '''Connect to a fresh U-Boot instance.
- A new sandbox process is created, so that U-Boot begins running from
- scratch.
- Args:
- None.
- Returns:
- A u_boot_spawn.Spawn object that is attached to U-Boot.
- '''
- return Spawn([self.config.build_dir + '/u-boot'])
- def kill(self, sig):
- '''Send a specific Unix signal to the sandbox process.
- Args:
- sig: The Unix signal to send to the process.
- Returns:
- Nothing.
- '''
- self.ensure_spawned()
- self.log.action('kill %d' % sig)
- self.p.kill(sig)
- def validate_exited(self):
- '''Determine whether the sandbox process has exited.
- If required, this function waits a reasonable time for the process to
- exit.
- Args:
- None.
- Returns:
- Boolean indicating whether the process has exited.
- '''
- p = self.p
- self.p = None
- for i in xrange(100):
- ret = not p.isalive()
- if ret:
- break
- time.sleep(0.1)
- p.close()
- return ret
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