dee5769870
Change the stepped function to spin on a flag until the helper thread advances the counter, so the step-over can only complete if the helper thread actually ran. Fixes #193398
74 lines
3.0 KiB
Python
74 lines
3.0 KiB
Python
import lldb
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from lldbsuite.test.decorators import *
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from lldbsuite.test.lldbtest import *
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from lldbsuite.test import lldbutil
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class AlwaysRunThreadNamesTestCase(TestBase):
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NO_DEBUG_INFO_TESTCASE = True
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@skipIfWindows
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def test_always_run_thread_resumes_during_step(self):
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"""Test that a thread named in always-run-thread-names continues
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running when another thread single-steps."""
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self.build()
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(target, _, thread, _) = lldbutil.run_to_source_breakpoint(
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self, "// break here", lldb.SBFileSpec("main.cpp")
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)
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# Configure the setting to keep our helper thread running.
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self.runCmd("settings set target.process.always-run-thread-names always-run")
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# Tell step_over_me() to block until the helper thread advances.
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self.runCmd("expression g_sync_with_helper = true")
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# Record the helper thread's counter before stepping.
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counter_before = target.FindFirstGlobalVariable("g_helper_count")
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self.assertTrue(counter_before.IsValid())
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val_before = counter_before.GetValueAsUnsigned()
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# The step over normally suspends all other threads, but the
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# always-run-thread-names setting keeps the helper thread running.
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# Because g_sync_with_helper is true, step_over_me() will spin until
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# the helper thread increments the counter.
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thread.StepOver(lldb.eOnlyThisThread)
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self.assertStopReason(thread.GetStopReason(), lldb.eStopReasonPlanComplete)
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counter_after = target.FindFirstGlobalVariable("g_helper_count")
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val_after = counter_after.GetValueAsUnsigned()
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self.assertGreater(
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val_after,
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val_before,
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"Helper thread counter did not advance during step-over "
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"(expected it to run because of always-run-thread-names).",
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)
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@skipIfWindows
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def test_without_setting_thread_is_suspended(self):
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"""Test that without the setting, the helper thread is suspended
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during single-stepping (baseline)."""
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self.build()
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(target, _, thread, _) = lldbutil.run_to_source_breakpoint(
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self, "// break here", lldb.SBFileSpec("main.cpp")
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)
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# Do NOT set always-run-thread-names.
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counter_before = target.FindFirstGlobalVariable("g_helper_count")
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self.assertTrue(counter_before.IsValid())
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val_before = counter_before.GetValueAsUnsigned()
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# Step over with only-this-thread mode.
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thread.StepOver(lldb.eOnlyThisThread)
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self.assertStopReason(thread.GetStopReason(), lldb.eStopReasonPlanComplete)
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# The helper thread should have been suspended, so its counter should
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# not have changed.
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counter_after = target.FindFirstGlobalVariable("g_helper_count")
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val_after = counter_after.GetValueAsUnsigned()
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self.assertEqual(
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val_after,
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val_before,
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"Helper thread counter advanced during step-over "
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"(expected it to be suspended without always-run-thread-names).",
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)
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