tools/cr/cr/actions/gdb.py

# Copyright 2013 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import os

import cr


class GdbDebugger(cr.Debugger):
  """An implementation of cr.Debugger that launches gdb."""

  DETECTED = cr.Config('DETECTED')

  @property
  def enabled(self):
    return (cr.LinuxPlatform.GetInstance().is_active and
            self.DETECTED.Find('CR_GDB'))

  def Invoke(self, context, targets, arguments):
    for target in targets:
      cr.Host.Execute(
          target,
          '{CR_GDB}', '--eval-command=run', '--args',
          '{CR_BINARY}',
          '{CR_RUN_ARGUMENTS}',
          *arguments
      )

  def Attach(self, context, targets, arguments):
    raise NotImplementedError('Attach not currently supported for gdb.')


def _DetectGdb():
  """Attempts to find a valid gdb on the path."""
  gdb_binaries = cr.Host.SearchPath('gdb')
  if gdb_binaries:
    GdbDebugger.DETECTED.Set(CR_GDB=gdb_binaries[0])

_DetectGdb()