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#!/usr/bin/python
# Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# tsan_analyze.py
''' Given a ThreadSanitizer output file, parses errors and uniques them.'''
import gdb_helper
import common
import logging
import optparse
import os
import re
import subprocess
import sys
import time
# Global symbol table (ugh)
TheAddressTable = None
class _StackTraceLine(object):
def __init__(self, line, address, binary):
self.raw_line_ = line
self.address = address
self.binary = binary
def __str__(self):
global TheAddressTable
file, line = TheAddressTable.GetFileLine(self.binary, self.address)
if (file is None) or (line is None):
return self.raw_line_
else:
return self.raw_line_.replace(self.binary, '%s:%s' % (file, line))
class TsanAnalyzer(object):
''' Given a set of ThreadSanitizer output files, parse all the errors out of
them, unique them and output the results.'''
LOAD_LIB_RE = re.compile('--[0-9]+-- ([^(:]*) \((0x[0-9a-f]+)\)')
TSAN_LINE_RE = re.compile('==[0-9]+==\s*[#0-9]+\s*'
'([0-9A-Fa-fx]+):'
'(?:[^ ]* )*'
'([^ :\n]+)'
'')
TSAN_WARNING_LINE_RE = re.compile('==[0-9]+==\s*[#0-9]+\s*'
'(?:[^ ]* )*'
'([^ :\n]+)')
THREAD_CREATION_STR = ("INFO: T.* "
"(has been created by T.* at this point|is program's main thread)")
SANITY_TEST_SUPPRESSION = "ThreadSanitizer sanity test"
TSAN_RACE_DESCRIPTION = "Possible data race"
TSAN_WARNING_DESCRIPTION = ("Unlocking a non-locked lock"
"|accessing an invalid lock"
"|which did not acquire this lock")
RACE_VERIFIER_LINE = "Confirmed a race|unexpected race"
def __init__(self, source_dir, use_gdb=False):
'''Reads in a set of files.
Args:
source_dir: Path to top of source tree for this build
'''
self._use_gdb = use_gdb
def ReadLine(self):
self.line_ = self.cur_fd_.readline()
self.stack_trace_line_ = None
if not self._use_gdb:
return
global TheAddressTable
match = TsanAnalyzer.LOAD_LIB_RE.match(self.line_)
if match:
binary, ip = match.groups()
TheAddressTable.AddBinaryAt(binary, ip)
return
match = TsanAnalyzer.TSAN_LINE_RE.match(self.line_)
if match:
address, binary_name = match.groups()
stack_trace_line = _StackTraceLine(self.line_, address, binary_name)
TheAddressTable.Add(stack_trace_line.binary, stack_trace_line.address)
self.stack_trace_line_ = stack_trace_line
def ReadSection(self):
result = [self.line_]
if re.search("{{{", self.line_):
while not re.search('}}}', self.line_):
self.ReadLine()
if self.stack_trace_line_ is None:
result.append(self.line_)
else:
result.append(self.stack_trace_line_)
return result
def ParseReportFile(self, filename):
'''Parses a report file and returns a list of ThreadSanitizer reports.
Args:
filename: report filename.
Returns:
list of (list of (str iff self._use_gdb, _StackTraceLine otherwise)).
'''
ret = []
self.cur_fd_ = open(filename, 'r')
while True:
# Read ThreadSanitizer reports.
self.ReadLine()
if (self.line_ == ''):
break
tmp = []
while re.search(TsanAnalyzer.RACE_VERIFIER_LINE, self.line_):
tmp.append(self.line_)
self.ReadLine()
while re.search(TsanAnalyzer.THREAD_CREATION_STR, self.line_):
tmp.extend(self.ReadSection())
self.ReadLine()
if re.search(TsanAnalyzer.TSAN_RACE_DESCRIPTION, self.line_):
tmp.extend(self.ReadSection())
ret.append(tmp)
if (re.search(TsanAnalyzer.TSAN_WARNING_DESCRIPTION, self.line_) and
not common.IsWindows()): # workaround for http://crbug.com/53198
tmp.extend(self.ReadSection())
ret.append(tmp)
match = re.search(" used_suppression:\s+([0-9]+)\s(.*)", self.line_)
if match:
count, supp_name = match.groups()
count = int(count)
if supp_name in self.used_suppressions:
self.used_suppressions[supp_name] += count
else:
self.used_suppressions[supp_name] = count
self.cur_fd_.close()
return ret
def GetReports(self, files):
'''Extracts reports from a set of files.
Reads a set of files and returns a list of all discovered
ThreadSanitizer race reports. As a side effect, populates
self.used_suppressions with appropriate info.
'''
global TheAddressTable
if self._use_gdb:
TheAddressTable = gdb_helper.AddressTable()
else:
TheAddressTable = None
reports = []
self.used_suppressions = {}
for file in files:
reports.extend(self.ParseReportFile(file))
if self._use_gdb:
TheAddressTable.ResolveAll()
# Make each line of each report a string.
reports = map(lambda(x): map(str, x), reports)
return [''.join(report_lines) for report_lines in reports]
def Report(self, files, check_sanity=False):
'''Reads in a set of files and prints ThreadSanitizer report.
Args:
files: A list of filenames.
check_sanity: if true, search for SANITY_TEST_SUPPRESSIONS
'''
reports = self.GetReports(files)
is_sane = False
print "-----------------------------------------------------"
print "Suppressions used:"
print " count name"
for item in sorted(self.used_suppressions.items(), key=lambda (k,v): (v,k)):
print "%7s %s" % (item[1], item[0])
if item[0].startswith(TsanAnalyzer.SANITY_TEST_SUPPRESSION):
is_sane = True
print "-----------------------------------------------------"
sys.stdout.flush()
retcode = 0
if len(reports) > 0:
logging.error("FAIL! Found %i report(s)" % len(reports))
for report in reports:
logging.error('\n' + report)
retcode = -1
# Report tool's insanity even if there were errors.
if check_sanity and not is_sane:
logging.error("FAIL! Sanity check failed!")
retcode = -3
if retcode != 0:
return retcode
logging.info("PASS: No reports found")
return 0
if __name__ == '__main__':
'''For testing only. The TsanAnalyzer class should be imported instead.'''
retcode = 0
parser = optparse.OptionParser("usage: %prog [options] <files to analyze>")
parser.add_option("", "--source_dir",
help="path to top of source tree for this build"
"(used to normalize source paths in baseline)")
(options, args) = parser.parse_args()
if len(args) == 0:
parser.error("no filename specified")
filenames = args
analyzer = TsanAnalyzer(options.source_dir, use_gdb=True)
retcode = analyzer.Report(filenames)
sys.exit(retcode)
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