Imported Upstream version 1.2.0.d20091224upstream/1.2.0.d20091224

1 files changed, 237 insertions, 0 deletions

diff --git a/engine/SCons/Debug.py b/engine/SCons/Debug.py
new file mode 100644
index 0000000..a7681c3
--- /dev/null
+++ b/engine/SCons/Debug.py
@@ -0,0 +1,237 @@
+"""SCons.Debug
+
+Code for debugging SCons internal things.  Not everything here is
+guaranteed to work all the way back to Python 1.5.2, and shouldn't be
+needed by most users.
+
+"""
+
+#
+# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 The SCons Foundation
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
+# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+
+__revision__ = "src/engine/SCons/Debug.py 4577 2009/12/27 19:43:56 scons"
+
+import os
+import string
+import sys
+import time
+
+# Recipe 14.10 from the Python Cookbook.
+try:
+    import weakref
+except ImportError:
+    def logInstanceCreation(instance, name=None):
+        pass
+else:
+    def logInstanceCreation(instance, name=None):
+        if name is None:
+            name = instance.__class__.__name__
+        if not tracked_classes.has_key(name):
+            tracked_classes[name] = []
+        tracked_classes[name].append(weakref.ref(instance))
+
+
+
+tracked_classes = {}
+
+def string_to_classes(s):
+    if s == '*':
+        c = tracked_classes.keys()
+        c.sort()
+        return c
+    else:
+        return string.split(s)
+
+def fetchLoggedInstances(classes="*"):
+    classnames = string_to_classes(classes)
+    return map(lambda cn: (cn, len(tracked_classes[cn])), classnames)
+  
+def countLoggedInstances(classes, file=sys.stdout):
+    for classname in string_to_classes(classes):
+        file.write("%s: %d\n" % (classname, len(tracked_classes[classname])))
+
+def listLoggedInstances(classes, file=sys.stdout):
+    for classname in string_to_classes(classes):
+        file.write('\n%s:\n' % classname)
+        for ref in tracked_classes[classname]:
+            obj = ref()
+            if obj is not None:
+                file.write('    %s\n' % repr(obj))
+
+def dumpLoggedInstances(classes, file=sys.stdout):
+    for classname in string_to_classes(classes):
+        file.write('\n%s:\n' % classname)
+        for ref in tracked_classes[classname]:
+            obj = ref()
+            if obj is not None:
+                file.write('    %s:\n' % obj)
+                for key, value in obj.__dict__.items():
+                    file.write('        %20s : %s\n' % (key, value))
+
+
+
+if sys.platform[:5] == "linux":
+    # Linux doesn't actually support memory usage stats from getrusage().
+    def memory():
+        mstr = open('/proc/self/stat').read()
+        mstr = string.split(mstr)[22]
+        return int(mstr)
+else:
+    try:
+        import resource
+    except ImportError:
+        try:
+            import win32process
+            import win32api
+        except ImportError:
+            def memory():
+                return 0
+        else:
+            def memory():
+                process_handle = win32api.GetCurrentProcess()
+                memory_info = win32process.GetProcessMemoryInfo( process_handle )
+                return memory_info['PeakWorkingSetSize']
+    else:
+        def memory():
+            res = resource.getrusage(resource.RUSAGE_SELF)
+            return res[4]
+
+# returns caller's stack
+def caller_stack(*backlist):
+    import traceback
+    if not backlist:
+        backlist = [0]
+    result = []
+    for back in backlist:
+        tb = traceback.extract_stack(limit=3+back)
+        key = tb[0][:3]
+        result.append('%s:%d(%s)' % func_shorten(key))
+    return result
+
+caller_bases = {}
+caller_dicts = {}
+
+# trace a caller's stack
+def caller_trace(back=0):
+    import traceback
+    tb = traceback.extract_stack(limit=3+back)
+    tb.reverse()
+    callee = tb[1][:3]
+    caller_bases[callee] = caller_bases.get(callee, 0) + 1
+    for caller in tb[2:]:
+        caller = callee + caller[:3]
+        try:
+            entry = caller_dicts[callee]
+        except KeyError:
+            caller_dicts[callee] = entry = {}
+        entry[caller] = entry.get(caller, 0) + 1
+        callee = caller
+
+# print a single caller and its callers, if any
+def _dump_one_caller(key, file, level=0):
+    l = []
+    for c,v in caller_dicts[key].items():
+        l.append((-v,c))
+    l.sort()
+    leader = '      '*level
+    for v,c in l:
+        file.write("%s  %6d %s:%d(%s)\n" % ((leader,-v) + func_shorten(c[-3:])))
+        if caller_dicts.has_key(c):
+            _dump_one_caller(c, file, level+1)
+
+# print each call tree
+def dump_caller_counts(file=sys.stdout):
+    keys = caller_bases.keys()
+    keys.sort()
+    for k in keys:
+        file.write("Callers of %s:%d(%s), %d calls:\n"
+                    % (func_shorten(k) + (caller_bases[k],)))
+        _dump_one_caller(k, file)
+
+shorten_list = [
+    ( '/scons/SCons/',          1),
+    ( '/src/engine/SCons/',     1),
+    ( '/usr/lib/python',        0),
+]
+
+if os.sep != '/':
+   def platformize(t):
+       return (string.replace(t[0], '/', os.sep), t[1])
+   shorten_list = map(platformize, shorten_list)
+   del platformize
+
+def func_shorten(func_tuple):
+    f = func_tuple[0]
+    for t in shorten_list:
+        i = string.find(f, t[0])
+        if i >= 0:
+            if t[1]:
+                i = i + len(t[0])
+            return (f[i:],)+func_tuple[1:]
+    return func_tuple
+
+
+TraceFP = {}
+if sys.platform == 'win32':
+    TraceDefault = 'con'
+else:
+    TraceDefault = '/dev/tty'
+
+TimeStampDefault = None
+StartTime = time.time()
+PreviousTime = StartTime
+
+def Trace(msg, file=None, mode='w', tstamp=None):
+    """Write a trace message to a file.  Whenever a file is specified,
+    it becomes the default for the next call to Trace()."""
+    global TraceDefault
+    global TimeStamp
+    global PreviousTime
+    if file is None:
+        file = TraceDefault
+    else:
+        TraceDefault = file
+    if tstamp is None:
+        tstamp = TimeStampDefault
+    else:
+        TimeStampDefault = tstamp
+    try:
+        fp = TraceFP[file]
+    except KeyError:
+        try:
+            fp = TraceFP[file] = open(file, mode)
+        except TypeError:
+            # Assume we were passed an open file pointer.
+            fp = file
+    if tstamp:
+        now = time.time()
+        fp.write('%8.4f %8.4f:  ' % (now - StartTime, now - PreviousTime))
+        PreviousTime = now
+    fp.write(msg)
+    fp.flush()
+
+# Local Variables:
+# tab-width:4
+# indent-tabs-mode:nil
+# End:
+# vim: set expandtab tabstop=4 shiftwidth=4: