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# TestTsanSwift.py
#
# This source file is part of the Swift.org open source project
#
# Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
# Licensed under Apache License v2.0 with Runtime Library Exception
#
# See https://swift.org/LICENSE.txt for license information
# See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
#
# ------------------------------------------------------------------------------
"""
Test that the TSan support correctly reports Swift access races (races on
mutating methods of a struct).
"""
import lldb
from lldbsuite.test.decorators import *
import lldbsuite.test.lldbtest as lldbtest
import lldbsuite.test.lldbutil as lldbutil
import os
import unittest2
import json
class TsanSwiftAccessRaceTestCase(lldbtest.TestBase):
mydir = lldbtest.TestBase.compute_mydir(__file__)
@swiftTest
@skipIfLinux
@skipUnlessSwiftThreadSanitizer
@skipIfAsan # This test does not behave reliable with an ASANified LLDB.
def test_tsan_swift(self):
self.build()
self.do_test()
def setUp(self):
lldbtest.TestBase.setUp(self)
self.main_source = "main.swift"
self.main_source_spec = lldb.SBFileSpec(self.main_source)
def do_test(self):
exe_name = "a.out"
exe = self.getBuildArtifact(exe_name)
# Create the target
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, lldbtest.VALID_TARGET)
runtimes = []
for m in target.module_iter():
libspec = m.GetFileSpec()
if "clang_rt" in libspec.GetFilename():
runtimes.append(os.path.join(libspec.GetDirectory(), libspec.GetFilename()))
self.registerSharedLibrariesWithTarget(target, runtimes)
# Unfortunatley the runtime itself isn't 100% reliable in reporting TSAN errors.
process = None
stop_reason = lldb.eStopReasonInvalid
for retry in range(5):
process = target.LaunchSimple(None, None, self.get_process_working_directory())
if not process:
continue
stop_reason = process.GetSelectedThread().GetStopReason()
if stop_reason == lldb.eStopReasonInstrumentation:
break
self.assertEqual(
process.GetSelectedThread().GetStopReason(),
lldb.eStopReasonInstrumentation)
# the stop reason of the thread should be a TSan report.
self.expect("thread list", "A Swift access race should be detected",
substrs=['stopped', 'stop reason = Swift access race detected'])
self.expect(
"thread info -s",
"The extended stop info should contain the TSan provided fields",
substrs=[
"instrumentation_class",
"description",
"mops"])
output_lines = self.res.GetOutput().split('\n')
json_line = '\n'.join(output_lines[2:])
data = json.loads(json_line)
self.assertEqual(data["instrumentation_class"], "ThreadSanitizer")
self.assertEqual(data["issue_type"], "external-race")
self.assertEqual(len(data["mops"]), 2)
self.assertTrue(data["location_filename"].endswith("/main.swift"))
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