js/src/devtools/rootAnalysis/explain.py@6474c204b198 (annotated)
js/src/devtools/rootAnalysis/explain.py
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rwxr-xr-x
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | #!/usr/bin/python |
| michael@0 | 2 | |
| michael@0 | 3 | import re |
| michael@0 | 4 | import argparse |
| michael@0 | 5 | |
| michael@0 | 6 | parser = argparse.ArgumentParser(description='Process some integers.') |
| michael@0 | 7 | parser.add_argument('rootingHazards', nargs='?', default='rootingHazards.txt') |
| michael@0 | 8 | parser.add_argument('gcFunctions', nargs='?', default='gcFunctions.txt') |
| michael@0 | 9 | parser.add_argument('hazards', nargs='?', default='hazards.txt') |
| michael@0 | 10 | parser.add_argument('extra', nargs='?', default='unnecessary.txt') |
| michael@0 | 11 | parser.add_argument('refs', nargs='?', default='refs.txt') |
| michael@0 | 12 | args = parser.parse_args() |
| michael@0 | 13 | |
| michael@0 | 14 | num_hazards = 0 |
| michael@0 | 15 | num_refs = 0 |
| michael@0 | 16 | try: |
| michael@0 | 17 | with open(args.rootingHazards) as rootingHazards, \ |
| michael@0 | 18 | open(args.hazards, 'w') as hazards, \ |
| michael@0 | 19 | open(args.extra, 'w') as extra, \ |
| michael@0 | 20 | open(args.refs, 'w') as refs: |
| michael@0 | 21 | current_gcFunction = None |
| michael@0 | 22 | |
| michael@0 | 23 | # Map from a GC function name to the list of hazards resulting from |
| michael@0 | 24 | # that GC function |
| michael@0 | 25 | hazardousGCFunctions = {} |
| michael@0 | 26 | |
| michael@0 | 27 | # List of tuples (gcFunction, index of hazard) used to maintain the |
| michael@0 | 28 | # ordering of the hazards |
| michael@0 | 29 | hazardOrder = [] |
| michael@0 | 30 | |
| michael@0 | 31 | for line in rootingHazards: |
| michael@0 | 32 | m = re.match(r'^Time: (.*)', line) |
| michael@0 | 33 | mm = re.match(r'^Run on:', line) |
| michael@0 | 34 | if m or mm: |
| michael@0 | 35 | print >>hazards, line |
| michael@0 | 36 | print >>extra, line |
| michael@0 | 37 | print >>refs, line |
| michael@0 | 38 | continue |
| michael@0 | 39 | |
| michael@0 | 40 | m = re.match(r'^Function.*has unnecessary root', line) |
| michael@0 | 41 | if m: |
| michael@0 | 42 | print >>extra, line |
| michael@0 | 43 | continue |
| michael@0 | 44 | |
| michael@0 | 45 | m = re.match(r'^Function.*takes unsafe address of unrooted', line) |
| michael@0 | 46 | if m: |
| michael@0 | 47 | num_refs += 1 |
| michael@0 | 48 | print >>refs, line |
| michael@0 | 49 | continue |
| michael@0 | 50 | |
| michael@0 | 51 | m = re.match(r"^Function.*has unrooted.*of type.*live across GC call ('?)(.*?)('?) at \S+:\d+$", line) |
| michael@0 | 52 | if m: |
| michael@0 | 53 | # Function names are surrounded by single quotes. Field calls |
| michael@0 | 54 | # are unquoted. |
| michael@0 | 55 | current_gcFunction = m.group(2) |
| michael@0 | 56 | hazardousGCFunctions.setdefault(current_gcFunction, []).append(line) |
| michael@0 | 57 | hazardOrder.append((current_gcFunction, len(hazardousGCFunctions[current_gcFunction]) - 1)) |
| michael@0 | 58 | num_hazards += 1 |
| michael@0 | 59 | continue |
| michael@0 | 60 | |
| michael@0 | 61 | if current_gcFunction: |
| michael@0 | 62 | if not line.strip(): |
| michael@0 | 63 | # Blank line => end of this hazard |
| michael@0 | 64 | current_gcFunction = None |
| michael@0 | 65 | else: |
| michael@0 | 66 | hazardousGCFunctions[current_gcFunction][-1] += line |
| michael@0 | 67 | |
| michael@0 | 68 | with open(args.gcFunctions) as gcFunctions: |
| michael@0 | 69 | gcExplanations = {} # gcFunction => stack showing why it can GC |
| michael@0 | 70 | |
| michael@0 | 71 | current_func = None |
| michael@0 | 72 | explanation = None |
| michael@0 | 73 | for line in gcFunctions: |
| michael@0 | 74 | m = re.match(r'^GC Function: (.*)', line) |
| michael@0 | 75 | if m: |
| michael@0 | 76 | if current_func: |
| michael@0 | 77 | gcExplanations[current_func] = explanation |
| michael@0 | 78 | current_func = None |
| michael@0 | 79 | if m.group(1) in hazardousGCFunctions: |
| michael@0 | 80 | current_func = m.group(1) |
| michael@0 | 81 | explanation = line |
| michael@0 | 82 | elif current_func: |
| michael@0 | 83 | explanation += line |
| michael@0 | 84 | if current_func: |
| michael@0 | 85 | gcExplanations[current_func] = explanation |
| michael@0 | 86 | |
| michael@0 | 87 | for gcFunction, index in hazardOrder: |
| michael@0 | 88 | gcHazards = hazardousGCFunctions[gcFunction] |
| michael@0 | 89 | if gcFunction in gcExplanations: |
| michael@0 | 90 | print >>hazards, (gcHazards[index] + gcExplanations[gcFunction]) |
| michael@0 | 91 | else: |
| michael@0 | 92 | print >>hazards, gcHazards[index] |
| michael@0 | 93 | |
| michael@0 | 94 | except IOError as e: |
| michael@0 | 95 | print 'Failed: %s' % str(e) |
| michael@0 | 96 | |
| michael@0 | 97 | print("Wrote %s" % args.hazards) |
| michael@0 | 98 | print("Wrote %s" % args.extra) |
| michael@0 | 99 | print("Wrote %s" % args.refs) |
| michael@0 | 100 | print("Found %d hazards and %d unsafe references" % (num_hazards, num_refs)) |
