145 lines
5.2 KiB
Python
145 lines
5.2 KiB
Python
"""
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Tests basic ThreadSanitizer support (detecting a data race).
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"""
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import lldb
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from lldbsuite.test.lldbtest import *
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from lldbsuite.test.decorators import *
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import lldbsuite.test.lldbutil as lldbutil
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import json
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class TsanBasicTestCase(TestBase):
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@expectedFailureAll(
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oslist=["linux"],
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bugnumber="non-core functionality, need to reenable and fix later (DES 2014.11.07)",
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)
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@expectedFailureNetBSD
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@skipIfFreeBSD # llvm.org/pr21136 runtimes not yet available by default
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@skipIfRemote
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@skipUnlessThreadSanitizer
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@no_debug_info_test
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def test(self):
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self.build()
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self.tsan_tests()
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def setUp(self):
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# Call super's setUp().
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TestBase.setUp(self)
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self.line_malloc = line_number("main.c", "// malloc line")
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self.line_thread1 = line_number("main.c", "// thread1 line")
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self.line_thread2 = line_number("main.c", "// thread2 line")
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def tsan_tests(self):
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exe = self.getBuildArtifact("a.out")
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self.expect("file " + exe, patterns=["Current executable set to .*a.out"])
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self.runCmd("run")
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stop_reason = (
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self.dbg.GetSelectedTarget().process.GetSelectedThread().GetStopReason()
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)
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if stop_reason == lldb.eStopReasonExec:
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# On OS X 10.10 and older, we need to re-exec to enable
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# interceptors.
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self.runCmd("continue")
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# the stop reason of the thread should be breakpoint.
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self.expect(
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"thread list",
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"A data race should be detected",
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substrs=["stopped", "stop reason = Data race detected"],
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)
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self.assertEqual(
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self.dbg.GetSelectedTarget().process.GetSelectedThread().GetStopReason(),
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lldb.eStopReasonInstrumentation,
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)
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# test that the TSan dylib is present
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self.expect(
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"image lookup -n __tsan_get_current_report",
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"__tsan_get_current_report should be present",
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substrs=["1 match found"],
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)
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# We should be stopped in __tsan_on_report
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process = self.dbg.GetSelectedTarget().process
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thread = process.GetSelectedThread()
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frame = thread.GetSelectedFrame()
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self.assertIn("__tsan_on_report", frame.GetFunctionName())
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# The stopped thread backtrace should contain either line1 or line2
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# from main.c.
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found = False
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for i in range(0, thread.GetNumFrames()):
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frame = thread.GetFrameAtIndex(i)
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if frame.GetLineEntry().GetFileSpec().GetFilename() == "main.c":
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if frame.GetLineEntry().GetLine() == self.line_thread1:
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found = True
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if frame.GetLineEntry().GetLine() == self.line_thread2:
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found = True
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self.assertTrue(found)
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self.expect(
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"thread info -s",
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"The extended stop info should contain the TSan provided fields",
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substrs=["instrumentation_class", "description", "mops"],
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)
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output_lines = self.res.GetOutput().split("\n")
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json_line = "\n".join(output_lines[2:])
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data = json.loads(json_line)
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self.assertEqual(data["instrumentation_class"], "ThreadSanitizer")
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self.assertEqual(data["issue_type"], "data-race")
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self.assertEqual(len(data["mops"]), 2)
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backtraces = thread.GetStopReasonExtendedBacktraces(
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lldb.eInstrumentationRuntimeTypeAddressSanitizer
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)
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self.assertEqual(backtraces.GetSize(), 0)
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backtraces = thread.GetStopReasonExtendedBacktraces(
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lldb.eInstrumentationRuntimeTypeThreadSanitizer
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)
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self.assertTrue(backtraces.GetSize() >= 2)
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# First backtrace is a memory operation
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thread = backtraces.GetThreadAtIndex(0)
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found = False
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for i in range(0, thread.GetNumFrames()):
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frame = thread.GetFrameAtIndex(i)
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if frame.GetLineEntry().GetFileSpec().GetFilename() == "main.c":
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if frame.GetLineEntry().GetLine() == self.line_thread1:
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found = True
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if frame.GetLineEntry().GetLine() == self.line_thread2:
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found = True
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self.assertTrue(found)
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# Second backtrace is a memory operation
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thread = backtraces.GetThreadAtIndex(1)
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found = False
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for i in range(0, thread.GetNumFrames()):
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frame = thread.GetFrameAtIndex(i)
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if frame.GetLineEntry().GetFileSpec().GetFilename() == "main.c":
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if frame.GetLineEntry().GetLine() == self.line_thread1:
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found = True
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if frame.GetLineEntry().GetLine() == self.line_thread2:
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found = True
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self.assertTrue(found)
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self.runCmd("continue")
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# the stop reason of the thread should be a SIGABRT.
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self.expect(
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"thread list",
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"We should be stopped due a SIGABRT",
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substrs=["stopped", "stop reason = signal SIGABRT"],
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)
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# test that we're in pthread_kill now (TSan abort the process)
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self.expect(
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"thread list",
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"We should be stopped in pthread_kill",
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substrs=["pthread_kill"],
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)
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