1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/devtools/rootAnalysis/explain.py Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,100 @@
1.4 +#!/usr/bin/python
1.5 +
1.6 +import re
1.7 +import argparse
1.8 +
1.9 +parser = argparse.ArgumentParser(description='Process some integers.')
1.10 +parser.add_argument('rootingHazards', nargs='?', default='rootingHazards.txt')
1.11 +parser.add_argument('gcFunctions', nargs='?', default='gcFunctions.txt')
1.12 +parser.add_argument('hazards', nargs='?', default='hazards.txt')
1.13 +parser.add_argument('extra', nargs='?', default='unnecessary.txt')
1.14 +parser.add_argument('refs', nargs='?', default='refs.txt')
1.15 +args = parser.parse_args()
1.16 +
1.17 +num_hazards = 0
1.18 +num_refs = 0
1.19 +try:
1.20 + with open(args.rootingHazards) as rootingHazards, \
1.21 + open(args.hazards, 'w') as hazards, \
1.22 + open(args.extra, 'w') as extra, \
1.23 + open(args.refs, 'w') as refs:
1.24 + current_gcFunction = None
1.25 +
1.26 + # Map from a GC function name to the list of hazards resulting from
1.27 + # that GC function
1.28 + hazardousGCFunctions = {}
1.29 +
1.30 + # List of tuples (gcFunction, index of hazard) used to maintain the
1.31 + # ordering of the hazards
1.32 + hazardOrder = []
1.33 +
1.34 + for line in rootingHazards:
1.35 + m = re.match(r'^Time: (.*)', line)
1.36 + mm = re.match(r'^Run on:', line)
1.37 + if m or mm:
1.38 + print >>hazards, line
1.39 + print >>extra, line
1.40 + print >>refs, line
1.41 + continue
1.42 +
1.43 + m = re.match(r'^Function.*has unnecessary root', line)
1.44 + if m:
1.45 + print >>extra, line
1.46 + continue
1.47 +
1.48 + m = re.match(r'^Function.*takes unsafe address of unrooted', line)
1.49 + if m:
1.50 + num_refs += 1
1.51 + print >>refs, line
1.52 + continue
1.53 +
1.54 + m = re.match(r"^Function.*has unrooted.*of type.*live across GC call ('?)(.*?)('?) at \S+:\d+$", line)
1.55 + if m:
1.56 + # Function names are surrounded by single quotes. Field calls
1.57 + # are unquoted.
1.58 + current_gcFunction = m.group(2)
1.59 + hazardousGCFunctions.setdefault(current_gcFunction, []).append(line)
1.60 + hazardOrder.append((current_gcFunction, len(hazardousGCFunctions[current_gcFunction]) - 1))
1.61 + num_hazards += 1
1.62 + continue
1.63 +
1.64 + if current_gcFunction:
1.65 + if not line.strip():
1.66 + # Blank line => end of this hazard
1.67 + current_gcFunction = None
1.68 + else:
1.69 + hazardousGCFunctions[current_gcFunction][-1] += line
1.70 +
1.71 + with open(args.gcFunctions) as gcFunctions:
1.72 + gcExplanations = {} # gcFunction => stack showing why it can GC
1.73 +
1.74 + current_func = None
1.75 + explanation = None
1.76 + for line in gcFunctions:
1.77 + m = re.match(r'^GC Function: (.*)', line)
1.78 + if m:
1.79 + if current_func:
1.80 + gcExplanations[current_func] = explanation
1.81 + current_func = None
1.82 + if m.group(1) in hazardousGCFunctions:
1.83 + current_func = m.group(1)
1.84 + explanation = line
1.85 + elif current_func:
1.86 + explanation += line
1.87 + if current_func:
1.88 + gcExplanations[current_func] = explanation
1.89 +
1.90 + for gcFunction, index in hazardOrder:
1.91 + gcHazards = hazardousGCFunctions[gcFunction]
1.92 + if gcFunction in gcExplanations:
1.93 + print >>hazards, (gcHazards[index] + gcExplanations[gcFunction])
1.94 + else:
1.95 + print >>hazards, gcHazards[index]
1.96 +
1.97 +except IOError as e:
1.98 + print 'Failed: %s' % str(e)
1.99 +
1.100 +print("Wrote %s" % args.hazards)
1.101 +print("Wrote %s" % args.extra)
1.102 +print("Wrote %s" % args.refs)
1.103 +print("Found %d hazards and %d unsafe references" % (num_hazards, num_refs))
