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#!/usr/bin/python
import sys
import re
import io
callDict = dict() # callInfo tuple -> callValue
# clang does not always use exactly the same numbers in the type-parameter vars it generates
# so I need to substitute them to ensure we can match correctly.
normalizeTypeParamsRegex = re.compile(r"type-parameter-\d+-\d+")
def normalizeTypeParams( line ):
return normalizeTypeParamsRegex.sub("type-parameter-?-?", line)
# reading as binary (since we known it is pure ascii) is much faster than reading as unicode
with io.open("loplugin.constantparam.log", "rb", buffering=1024*1024) as txt:
for line in txt:
try:
tokens = line.strip().split("\t")
returnType = normalizeTypeParams(tokens[0])
nameAndParams = normalizeTypeParams(tokens[1])
sourceLocation = tokens[2]
paramName = tokens[3]
paramType = normalizeTypeParams(tokens[4])
callValue = tokens[5]
callInfo = (returnType, nameAndParams, paramName, paramType, sourceLocation)
if not callInfo in callDict:
callDict[callInfo] = set()
callDict[callInfo].add(callValue)
except IndexError:
print "problem with line " + line.strip()
raise
def RepresentsInt(s):
try:
int(s)
return True
except ValueError:
return False
constructor_regex = re.compile("^\w+\(\)$")
tmp1list = list()
tmp2list = list()
tmp3list = list()
tmp4list = list()
for callInfo, callValues in callDict.iteritems():
nameAndParams = callInfo[1]
if len(callValues) != 1:
continue
callValue = next(iter(callValues))
if "unknown" in callValue:
continue
sourceLoc = callInfo[4]
functionSig = callInfo[0] + " " + callInfo[1]
# try to ignore setter methods
if ("," not in nameAndParams) and (("::set" in nameAndParams) or ("::Set" in nameAndParams)):
continue
# ignore code that follows a common pattern
if sourceLoc.startswith("sw/inc/swatrset.hxx"): continue
if sourceLoc.startswith("sw/inc/format.hxx"): continue
# template generated code
if sourceLoc.startswith("include/sax/fshelper.hxx"): continue
# debug code
if sourceLoc.startswith("include/oox/dump"): continue
# part of our binary API
if sourceLoc.startswith("include/LibreOfficeKit"): continue
if RepresentsInt(callValue):
if callValue == "0" or callValue == "1":
tmp1list.append((sourceLoc, functionSig, callInfo[3] + " " + callInfo[2], callValue))
else:
tmp2list.append((sourceLoc, functionSig, callInfo[3] + " " + callInfo[2], callValue))
# look for places where the callsite is always a constructor invocation
elif constructor_regex.match(callValue) or callValue == "\"\"":
if callValue.startswith("Get"): continue
if callValue.startswith("get"): continue
if "operator=" in functionSig: continue
if "&&" in functionSig: continue
if callInfo[2] == "###0" and callValue == "InitData()": continue
if callInfo[2] == "###0" and callValue == "InitAggregate()": continue
if callValue == "shared_from_this()": continue
tmp3list.append((sourceLoc, functionSig, callInfo[3] + " " + callInfo[2], callValue))
else:
tmp4list.append((sourceLoc, functionSig, callInfo[3] + " " + callInfo[2], callValue))
# sort results by filename:lineno
def natural_sort_key(s, _nsre=re.compile('([0-9]+)')):
return [int(text) if text.isdigit() else text.lower()
for text in re.split(_nsre, s)]
tmp1list.sort(key=lambda v: natural_sort_key(v[0]))
tmp2list.sort(key=lambda v: natural_sort_key(v[0]))
tmp3list.sort(key=lambda v: natural_sort_key(v[0]))
tmp4list.sort(key=lambda v: natural_sort_key(v[0]))
# print out the results
with open("compilerplugins/clang/constantparam.booleans.results", "wt") as f:
for v in tmp1list:
f.write(v[0] + "\n")
f.write(" " + v[1] + "\n")
f.write(" " + v[2] + "\n")
f.write(" " + v[3] + "\n")
with open("compilerplugins/clang/constantparam.numbers.results", "wt") as f:
for v in tmp2list:
f.write(v[0] + "\n")
f.write(" " + v[1] + "\n")
f.write(" " + v[2] + "\n")
f.write(" " + v[3] + "\n")
with open("compilerplugins/clang/constantparam.constructors.results", "wt") as f:
for v in tmp3list:
f.write(v[0] + "\n")
f.write(" " + v[1] + "\n")
f.write(" " + v[2] + "\n")
f.write(" " + v[3] + "\n")
with open("compilerplugins/clang/constantparam.others.results", "wt") as f:
for v in tmp4list:
f.write(v[0] + "\n")
f.write(" " + v[1] + "\n")
f.write(" " + v[2] + "\n")
f.write(" " + v[3] + "\n")
# -------------------------------------------------------------
# Now a fun set of heuristics to look for methods that
# take bitmask parameters where one or more of the bits in the
# bitmask is always one or always zero
# integer to hex str
def hex(i):
return "0x%x" % i
# I can't use python's ~ operator, because that produces negative numbers
def negate(i):
return (1 << 32) - 1 - i
tmp2list = list()
for callInfo, callValues in callDict.iteritems():
nameAndParams = callInfo[1]
if len(callValues) < 2:
continue
# we are only interested in enum parameters
if not "enum" in callInfo[3]: continue
if not "Flag" in callInfo[3] and not "flag" in callInfo[3] and not "Bit" in callInfo[3] and not "State" in callInfo[3]: continue
# try to ignore setter methods
if ("," not in nameAndParams) and (("::set" in nameAndParams) or ("::Set" in nameAndParams)):
continue
setBits = 0
clearBits = 0
continue_flag = False
first = True
for callValue in callValues:
if "unknown" == callValue or not callValue.isdigit():
continue_flag = True
break
if first:
setBits = int(callValue)
clearBits = negate(int(callValue))
first = False
else:
setBits = setBits & int(callValue)
clearBits = clearBits & negate(int(callValue))
# estimate allBits by using the highest bit we have seen
# TODO dump more precise information about the allBits values of enums
allBits = (1 << setBits.bit_length()) - 1
clearBits = clearBits & allBits
if continue_flag or (setBits == 0 and clearBits == 0): continue
sourceLoc = callInfo[4]
functionSig = callInfo[0] + " " + callInfo[1]
v2 = callInfo[3] + " " + callInfo[2]
if setBits != 0: v2 += " setBits=" + hex(setBits)
if clearBits != 0: v2 += " clearBits=" + hex(clearBits)
tmp2list.append((sourceLoc, functionSig, v2))
# sort results by filename:lineno
tmp2list.sort(key=lambda v: natural_sort_key(v[0]))
# print out the results
with open("compilerplugins/clang/constantparam.bitmask.results", "wt") as f:
for v in tmp2list:
f.write(v[0] + "\n")
f.write(" " + v[1] + "\n")
f.write(" " + v[2] + "\n")
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