101 lines
3.3 KiB
Python
101 lines
3.3 KiB
Python
"""
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Tests basic UndefinedBehaviorSanitizer support (detecting an alignment error).
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"""
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import os
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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 UbsanBasicTestCase(TestBase):
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@skipUnlessUndefinedBehaviorSanitizer
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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.ubsan_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_align = line_number("main.c", "// align line")
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def ubsan_tests(self):
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# Load the test
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exe = self.getBuildArtifact("a.out")
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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self.registerSanitizerLibrariesWithTarget(target)
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self.runCmd("run")
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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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# 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 ubsan issue should be detected",
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substrs=["stopped", "stop reason ="],
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)
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stop_reason = thread.GetStopReason()
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self.assertStopReason(stop_reason, lldb.eStopReasonInstrumentation)
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# test that the UBSan dylib is present
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self.expect(
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"image lookup -n __ubsan_on_report",
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"__ubsan_on_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 __ubsan_on_report
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self.assertIn("__ubsan_on_report", frame.GetFunctionName())
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# The stopped thread backtrace should contain either 'align line'
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found = False
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for i in range(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_align:
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found = True
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self.assertTrue(found)
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backtraces = thread.GetStopReasonExtendedBacktraces(
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lldb.eInstrumentationRuntimeTypeUndefinedBehaviorSanitizer
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)
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self.assertEquals(backtraces.GetSize(), 1)
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self.expect(
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"thread info -s",
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"The extended stop info should contain the UBSan provided fields",
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substrs=[
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"col",
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"description",
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"filename",
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"instrumentation_class",
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"line",
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"memory_address",
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],
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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"], "UndefinedBehaviorSanitizer")
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self.assertEqual(data["description"], "misaligned-pointer-use")
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self.assertEqual(os.path.basename(data["filename"]), "main.c")
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self.assertEqual(data["line"], self.line_align)
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for count in range(0, 8):
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process.Continue()
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stop_reason = thread.GetStopReason()
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self.assertEqual(
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stop_reason,
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lldb.eStopReasonInstrumentation,
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"Round {0} wasn't instrumentation".format(count),
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)
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