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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this file,
# You can obtain one at
from __future__ import print_function
import argparse
import re
from collections import defaultdict
parser = argparse.ArgumentParser(description='Process some integers.')
parser.add_argument('rootingHazards', nargs='?', default='rootingHazards.txt')
parser.add_argument('gcFunctions', nargs='?', default='gcFunctions.txt')
parser.add_argument('hazards', nargs='?', default='hazards.txt')
parser.add_argument('extra', nargs='?', default='unnecessary.txt')
parser.add_argument('refs', nargs='?', default='refs.txt')
args = parser.parse_args()
num_hazards = 0
num_refs = 0
num_missing = 0
with open(args.rootingHazards) as rootingHazards, \
open(args.hazards, 'w') as hazards, \
open(args.extra, 'w') as extra, \
open(args.refs, 'w') as refs:
current_gcFunction = None
# Map from a GC function name to the list of hazards resulting from
# that GC function
hazardousGCFunctions = defaultdict(list)
# List of tuples (gcFunction, index of hazard) used to maintain the
# ordering of the hazards
hazardOrder = []
# Map from a hazardous GC function to the filename containing it.
fileOfFunction = {}
for line in rootingHazards:
m = re.match(r'^Time: (.*)', line)
mm = re.match(r'^Run on:', line)
if m or mm:
print(line, file=hazards)
print(line, file=extra)
print(line, file=refs)
m = re.match(r'^Function.*has unnecessary root', line)
if m:
print(line, file=extra)
m = re.match(r'^Function.*takes unsafe address of unrooted', line)
if m:
num_refs += 1
print(line, file=refs)
m = re.match(
r"^Function.*has unrooted.*of type.*live across GC call '(.*?)' at (\S+):\d+$", line) # NOQA: E501
if m:
current_gcFunction =
len(hazardousGCFunctions[current_gcFunction]) - 1))
num_hazards += 1
fileOfFunction[current_gcFunction] =
m = re.match(r'Function.*expected hazard.*but none were found', line)
if m:
num_missing += 1
print(line + "\n", file=hazards)
if current_gcFunction:
if not line.strip():
# Blank line => end of this hazard
current_gcFunction = None
hazardousGCFunctions[current_gcFunction][-1] += line
with open(args.gcFunctions) as gcFunctions:
gcExplanations = {} # gcFunction => stack showing why it can GC
current_func = None
explanation = None
for line in gcFunctions:
m = re.match(r'^GC Function: (.*)', line)
if m:
if current_func:
gcExplanations[current_func] = explanation
current_func = None
if in hazardousGCFunctions:
current_func =
explanation = line
elif current_func:
explanation += line
if current_func:
gcExplanations[current_func] = explanation
for gcFunction, index in hazardOrder:
gcHazards = hazardousGCFunctions[gcFunction]
if gcFunction in gcExplanations:
print(gcHazards[index] + gcExplanations[gcFunction], file=hazards)
print(gcHazards[index], file=hazards)
except IOError as e:
print('Failed: %s' % str(e))
print("Wrote %s" % args.hazards)
print("Wrote %s" % args.extra)
print("Wrote %s" % args.refs)
print("Found %d hazards %d unsafe references %d missing" % (num_hazards, num_refs, num_missing))