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#!/usr/bin/env python
# ===-- IStatsMerge.py ----------------------------------------------------===##
#
# The KLEE Symbolic Virtual Machine
#
# This file is distributed under the University of Illinois Open Source
# License. See LICENSE.TXT for details.
#
# ===----------------------------------------------------------------------===##
from __future__ import division
import sys, os
class MergeError(Exception):
pass
def checkAssemblies(directories):
def read(d):
try:
return open(os.path.join(d,'assembly.ll')).read()
except:
raise MergeError("unable to open assembly for: %s"%(`d`,))
reference = read(directories[0])
for d in directories[1:]:
if reference != read(d):
return False
return True
def allEqual(l):
return not [i for i in l if i!=l[0]]
def merge(inputs, output, outputDir):
inputs = [[None,iter(i)] for i in inputs]
def getLine(elt):
la,i = elt
if la is None:
try:
ln = i.next()
except StopIteration:
ln = None
except:
raise MergeError("unexpected IO error")
return ln
else:
elt[0] = None
return la
def getLines():
return map(getLine,inputs)
def putback(ln,elt):
assert elt[0] is None
elt[0] = ln
events = None
# read header (up to ob=)
while 1:
lns = getLines()
ln = lns[0]
if ln.startswith('ob='):
if [l for l in lns if not l.startswith('ob=')]:
raise MergeError("headers differ")
output.write('ob=%s\n'%(os.path.join(outputDir,'assembly.ll'),))
break
else:
if ln.startswith('positions:'):
if ln!='positions: instr line\n':
raise MergeError("unexpected 'positions' directive")
elif ln.startswith('events:'):
events = ln[len('events: '):].strip().split(' ')
if not allEqual(lns):
raise MergeError("headers differ")
output.write(ln)
if events is None:
raise MergeError('missing events directive')
boolTypes = set(['Icov','Iuncov'])
numEvents = len(events)
eventTypes = [e in boolTypes for e in events]
def mergeStats(datas):
if not allEqual([d[:2] for d in datas]):
raise MergeError("instruction or line specifications differ")
elif [d for d in datas if len(d)!=numEvents+2]:
raise MergeError("statistics differ in event counts")
result = [datas[0][0],datas[0][1]]
for i,ev in enumerate(events):
s = sum([d[i+2] for d in datas])
if ev=='Icov':
result.append(max([d[i+2] for d in datas])) # true iff any are non-zero
elif ev=='Iuncov':
result.append(min([d[i+2] for d in datas])) # true iff any are non-zero
else:
result.append(s)
return result
def readCalls():
results = {}
for elt in inputs:
while 1:
ln = getLine(elt)
if ln is not None and (ln.startswith('cfl=') or ln.startswith('cfn=')):
if ln.startswith('cfl='):
cfl = ln
cfn = getLine(elt)
if not cfn.startswith('cfn='):
raise MergeError("unexpected cfl directive without function")
else:
cfl = None
cfn = ln
target = getLine(elt)
if not target.startswith('calls='):
raise MergeError("unexpected cfn directive with calls")
stat = map(int,getLine(elt).strip().split(' '))
key = target
existing = results.get(target)
if existing is None:
results[key] = [cfl,cfn,target,stat]
else:
if existing[0]!=cfl or existing[1]!=cfn:
raise MergeError("multiple call descriptions for a single target")
existing[3] = mergeStats([existing[3],stat])
else:
putback(ln, elt)
break
return results
# read statistics
while 1:
lns = getLines()
ln = lns[0]
if ln is None:
if not allEqual(lns):
raise MergeError("unexpected end of input")
break
elif ln.startswith('fn') or ln.startswith('fl'):
if not allEqual(lns):
raise MergeError("files differ")
output.write(ln)
else:
# an actual statistic
data = [map(int,ln.strip().split(' ')) for ln in lns]
print >>output,' '.join(map(str,mergeStats(data)))
# read any associated calls
for cfl,cfn,calls,stat in readCalls().values():
if cfl is not None:
output.write(cfl)
output.write(cfn)
output.write(calls)
print >>output,' '.join(map(str,stat))
def main(args):
from optparse import OptionParser
op = OptionParser("usage: %prog [options] directories+ output")
opts,args = op.parse_args()
output = args.pop()
directories = args
if len(directories)<=1:
op.error("incorrect number of arguments")
print 'Merging:',', '.join(directories)
print 'Into:',output
if not checkAssemblies(directories):
raise MergeError("executables differ")
if not os.path.exists(output):
os.mkdir(output)
assembly = open(os.path.join(directories[0],'assembly.ll')).read()
open(os.path.join(output,'assembly.ll'),'w').write(assembly)
inputs = [open(os.path.join(d,'run.istats')) for d in directories]
merge(inputs, open(os.path.join(output,'run.istats'),'w'), output)
if __name__=='__main__':
main(sys.argv)
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