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import _hotshot
import os.path
import parser
import symbol
import sys
from _hotshot import \
WHAT_ENTER, \
WHAT_EXIT, \
WHAT_LINENO, \
WHAT_DEFINE_FILE, \
WHAT_ADD_INFO
__all__ = ["LogReader", "ENTER", "EXIT", "LINE"]
ENTER = WHAT_ENTER
EXIT = WHAT_EXIT
LINE = WHAT_LINENO
try:
StopIteration
except NameError:
StopIteration = IndexError
class LogReader:
def __init__(self, logfn):
# fileno -> filename
self._filemap = {}
# (fileno, lineno) -> filename, funcname
self._funcmap = {}
self._info = {}
self._reader = _hotshot.logreader(logfn)
self._nextitem = self._reader.next
self._stack = []
# Iteration support:
# This adds an optional (& ignored) parameter to next() so that the
# same bound method can be used as the __getitem__() method -- this
# avoids using an additional method call which kills the performance.
def next(self, index=0):
try:
what, tdelta, fileno, lineno = self._nextitem()
except TypeError:
# logreader().next() returns None at the end
self._reader.close()
raise StopIteration()
if what == WHAT_DEFINE_FILE:
self._filemap[fileno] = tdelta
return self.next()
if what == WHAT_ADD_INFO:
key = tdelta.lower()
try:
L = self._info[key]
except KeyError:
L = []
self._info[key] = L
L.append(lineno)
if key == "current-directory":
self.cwd = lineno
return self.next()
if what == WHAT_ENTER:
t = self._decode_location(fileno, lineno)
filename, funcname = t
self._stack.append((filename, funcname, lineno))
elif what == WHAT_EXIT:
filename, funcname, lineno = self._stack.pop()
else:
filename, funcname, firstlineno = self._stack[-1]
return what, (filename, lineno, funcname), tdelta
if sys.version < "2.2":
# Don't add this for newer Python versions; we only want iteration
# support, not general sequence support.
__getitem__ = next
else:
def __iter__(self):
return self
#
# helpers
#
def _decode_location(self, fileno, lineno):
try:
return self._funcmap[(fileno, lineno)]
except KeyError:
if self._loadfile(fileno):
filename = funcname = None
try:
filename, funcname = self._funcmap[(fileno, lineno)]
except KeyError:
filename = self._filemap.get(fileno)
funcname = None
self._funcmap[(fileno, lineno)] = (filename, funcname)
return filename, funcname
def _loadfile(self, fileno):
try:
filename = self._filemap[fileno]
except KeyError:
print "Could not identify fileId", fileno
return 1
if filename is None:
return 1
absname = os.path.normcase(os.path.join(self.cwd, filename))
try:
fp = open(absname)
except IOError:
return
st = parser.suite(fp.read())
fp.close()
# Scan the tree looking for def and lambda nodes, filling in
# self._funcmap with all the available information.
funcdef = symbol.funcdef
lambdef = symbol.lambdef
stack = [st.totuple(1)]
while stack:
tree = stack.pop()
try:
sym = tree[0]
except (IndexError, TypeError):
continue
if sym == funcdef:
self._funcmap[(fileno, tree[2][2])] = filename, tree[2][1]
elif sym == lambdef:
self._funcmap[(fileno, tree[1][2])] = filename, "<lambda>"
stack.extend(list(tree[1:]))
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