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# Copyright (c) 2011 Google Inc. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import re
class PlatformInfo(object):
"""This class provides a consistent (and mockable) interpretation of
system-specific values (like sys.platform and platform.mac_ver())
to be used by the rest of the webkitpy code base.
Public (static) properties:
-- os_name
-- os_version
Note that 'future' is returned for os_version if the operating system is
newer than one known to the code.
"""
def __init__(self, sys_module, platform_module, executive):
self._executive = executive
self._platform_module = platform_module
self.os_name = self._determine_os_name(sys_module.platform)
if self.os_name == 'linux':
self.os_version = self._determine_linux_version()
if self.os_name == 'freebsd':
self.os_version = platform_module.release()
if self.os_name.startswith('mac'):
self.os_version = self._determine_mac_version(platform_module.mac_ver()[0])
if self.os_name.startswith('win'):
self.os_version = self._determine_win_version(self._win_version_tuple(sys_module))
def is_mac(self):
return self.os_name == 'mac'
def is_win(self):
return self.os_name == 'win'
def is_linux(self):
return self.os_name == 'linux'
def is_freebsd(self):
return self.os_name == 'freebsd'
def display_name(self):
# platform.platform() returns Darwin information for Mac, which is just confusing.
if self.is_mac():
return "Mac OS X %s" % self._platform_module.mac_ver()[0]
# Returns strings like:
# Linux-2.6.18-194.3.1.el5-i686-with-redhat-5.5-Final
# Windows-2008ServerR2-6.1.7600
return self._platform_module.platform()
def free_bytes_memory(self):
if self.is_mac():
vm_stat_output = self._executive.run_command(["vm_stat"])
free_bytes = self._compute_bytes_from_vm_stat_output("Pages free", vm_stat_output)
# Per https://bugs.webkit.org/show_bug.cgi?id=74650 include inactive memory since the OS is lazy about freeing memory.
free_bytes += self._compute_bytes_from_vm_stat_output("Pages inactive", vm_stat_output)
return free_bytes
return None
def total_bytes_memory(self):
if self.is_mac():
return int(self._executive.run_command(["sysctl", "-n", "hw.memsize"]))
return None
def _determine_os_name(self, sys_platform):
if sys_platform == 'darwin':
return 'mac'
if sys_platform.startswith('linux'):
return 'linux'
if sys_platform in ('win32', 'cygwin'):
return 'win'
if sys_platform.startswith('freebsd'):
return 'freebsd'
raise AssertionError('unrecognized platform string "%s"' % sys_platform)
def _determine_mac_version(self, mac_version_string):
release_version = mac_version_string.split('.')[1]
version_strings = {
'5': 'leopard',
'6': 'snowleopard',
'7': 'lion',
}
assert release_version >= min(version_strings.keys())
return version_strings.get(release_version, 'future')
def _determine_linux_version(self):
# FIXME: we ignore whatever the real version is and pretend it's lucid for now.
return 'lucid'
def _determine_win_version(self, win_version_tuple):
if win_version_tuple[:3] == (6, 1, 7600):
return '7sp0'
if win_version_tuple[:2] == (6, 0):
return 'vista'
if win_version_tuple[:2] == (5, 1):
return 'xp'
assert win_version_tuple[0] > 6 or win_version_tuple[1] >= 1, 'Unrecognized Windows version tuple: "%s"' % (win_version_tuple,)
return 'future'
def _win_version_tuple(self, sys_module):
if hasattr(sys_module, 'getwindowsversion'):
return sys_module.getwindowsversion()
return self._win_version_tuple_from_cmd()
def _win_version_tuple_from_cmd(self):
# Note that this should only ever be called on windows, so this should always work.
ver_output = self._executive.run_command(['cmd', '/c', 'ver'])
match_object = re.search(r'(?P<major>\d)\.(?P<minor>\d)\.(?P<build>\d+)', ver_output)
assert match_object, 'cmd returned an unexpected version string: ' + ver_output
return tuple(map(int, match_object.groups()))
def _compute_bytes_from_vm_stat_output(self, label_text, vm_stat_output):
page_size_match = re.search(r"page size of (\d+) bytes", vm_stat_output)
free_pages_match = re.search(r"%s:\s+(\d+)." % label_text, vm_stat_output)
# Fail hard if vmstat's output isn't what we expect.
assert(page_size_match and free_pages_match)
free_page_count = int(free_pages_match.group(1))
page_size = int(page_size_match.group(1))
return free_page_count * page_size
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