8f1b0f6327
Add a new decorator `skipIfTargetDoesNotSupportThreads` to skip tests that use threading. This is motivated by running the test suite targeting WebAssembly, where `wasip1` does not support threads. There are variants that do support threading (e.g. `wasip1-threading`) that the current implementation accounts for.
115 lines
3.7 KiB
Python
115 lines
3.7 KiB
Python
"""
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Test thread creation after process attach.
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"""
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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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@skipIfTargetDoesNotSupportThreads()
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class CreateAfterAttachTestCase(TestBase):
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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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# Find the line numbers for our breakpoints.
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self.break_1 = line_number("main.cpp", "// Set first breakpoint here")
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self.break_2 = line_number("main.cpp", "// Set second breakpoint here")
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self.break_3 = line_number("main.cpp", "// Set third breakpoint here")
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# Occasionally hangs on Windows, may be same as other issues.
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@skipIfWindows
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@skipIfiOSSimulator
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@expectedFailureNetBSD
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def test_create_after_attach(self):
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"""Test thread creation after process attach."""
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self.build()
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exe = self.getBuildArtifact("a.out")
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# Spawn a new process
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# use realpath to workaround llvm.org/pr48376
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popen = self.spawnSubprocess(os.path.realpath(exe))
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pid = popen.pid
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# Attach to the spawned process
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self.runCmd("process attach -p " + str(pid))
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target = self.dbg.GetSelectedTarget()
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process = target.GetProcess()
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self.assertTrue(process, PROCESS_IS_VALID)
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# This should create a breakpoint in the main thread.
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lldbutil.run_break_set_by_file_and_line(
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self, "main.cpp", self.break_1, num_expected_locations=1
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)
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# This should create a breakpoint in the second child thread.
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lldbutil.run_break_set_by_file_and_line(
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self, "main.cpp", self.break_2, num_expected_locations=1
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)
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# This should create a breakpoint in the first child thread.
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lldbutil.run_break_set_by_file_and_line(
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self, "main.cpp", self.break_3, num_expected_locations=1
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)
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# Note: With std::thread, we cannot rely on particular thread numbers. Using
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# std::thread may cause the program to spin up a thread pool (and it does on
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# Windows), so the thread numbers are non-deterministic.
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# Run to the first breakpoint
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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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STOPPED_DUE_TO_BREAKPOINT,
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substrs=["stopped", "* thread #", "main", "stop reason = breakpoint"],
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)
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# Change a variable to escape the loop
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self.runCmd("expression main_thread_continue = 1")
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# Run to the second breakpoint
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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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STOPPED_DUE_TO_BREAKPOINT,
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substrs=[
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"stopped",
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"* thread #",
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"thread_2_func",
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"stop reason = breakpoint",
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],
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)
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# Change a variable to escape the loop
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self.runCmd("expression child_thread_continue = 1")
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# Run to the third breakpoint
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self.runCmd("continue")
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# The stop reason of the thread should be breakpoint.
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# Thread 3 may or may not have already exited.
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self.expect(
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"thread list",
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STOPPED_DUE_TO_BREAKPOINT,
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substrs=[
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"stopped",
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"* thread #",
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"thread_1_func",
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"stop reason = breakpoint",
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],
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)
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# Run to completion
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self.runCmd("continue")
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# At this point, the inferior process should have exited.
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self.assertEqual(process.GetState(), lldb.eStateExited, PROCESS_EXITED)
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