1 files changed, 71 insertions, 0 deletions
diff --git a/Tools/Scripts/webkitpy/common/system/platforminfo.py b/Tools/Scripts/webkitpy/common/system/platforminfo.py
new file mode 100644
index 000000000..64e805df2
--- /dev/null
+++ b/Tools/Scripts/webkitpy/common/system/platforminfo.py
@@ -0,0 +1,71 @@
+# Copyright (c) 2010 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 platform
+import re
+
+
+# We use this instead of calls to platform directly to allow mocking.
+class PlatformInfo(object):
+    def __init__(self, executive):
+        self._executive = executive
+
+    def display_name(self):
+        # platform.platform() returns Darwin information for Mac, which is just confusing.
+        if platform.system() == "Darwin":
+            return "Mac OS X %s" % platform.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 platform.platform()
+
+    def total_bytes_memory(self):
+        system_name = platform.system()
+        if system_name == "Darwin":
+            return int(self._executive.run_command(["sysctl", "-n", "hw.memsize"]))
+        return None
+
+    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)
+        if not page_size_match or not free_pages_match:
+            return None
+        free_page_count = int(free_pages_match.group(1))
+        page_size = int(page_size_match.group(1))
+        return free_page_count * page_size
+
+    def free_bytes_memory(self):
+        system_name = platform.system()
+        if system_name == "Darwin":
+            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