123 lines
4.5 KiB
Python
123 lines
4.5 KiB
Python
"""
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Test number of threads.
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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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import lldbsuite.test.lldbutil as lldbutil
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class NumberOfThreadsTestCase(TestBase):
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NO_DEBUG_INFO_TESTCASE = True
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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 break points.
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self.thread3_notify_all_line = line_number('main.cpp', '// Set thread3 break point on notify_all at this line.')
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self.thread3_before_lock_line = line_number('main.cpp', '// thread3-before-lock')
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def test_number_of_threads(self):
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"""Test number of threads."""
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self.build()
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exe = self.getBuildArtifact("a.out")
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self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
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# This should create a breakpoint with 1 location.
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lldbutil.run_break_set_by_file_and_line(
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self, "main.cpp", self.thread3_notify_all_line, num_expected_locations=1)
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# The breakpoint list should show 1 location.
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self.expect(
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"breakpoint list -f",
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"Breakpoint location shown correctly",
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substrs=[
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"1: file = 'main.cpp', line = %d, exact_match = 0, locations = 1" %
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self.thread3_notify_all_line])
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# Run the program.
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self.runCmd("run", RUN_SUCCEEDED)
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# Stopped once.
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self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
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substrs=["stop reason = breakpoint 1."])
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# Get the target process
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target = self.dbg.GetSelectedTarget()
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process = target.GetProcess()
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# Get the number of threads
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num_threads = process.GetNumThreads()
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# Using std::thread may involve extra threads, so we assert that there are
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# at least 4 rather than exactly 4.
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self.assertTrue(
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num_threads >= 13,
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'Number of expected threads and actual threads do not match.')
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@skipIfDarwin # rdar://33462362
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@skipIfWindows # This is flakey on Windows: llvm.org/pr37658, llvm.org/pr38373
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def test_unique_stacks(self):
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"""Test backtrace unique with multiple threads executing the same stack."""
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self.build()
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exe = self.getBuildArtifact("a.out")
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self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
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# Set a break point on the thread3 notify all (should get hit on threads 4-13).
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lldbutil.run_break_set_by_file_and_line(
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self, "main.cpp", self.thread3_before_lock_line, num_expected_locations=1)
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# Run the program.
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self.runCmd("run", RUN_SUCCEEDED)
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# Stopped once.
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self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
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substrs=["stop reason = breakpoint 1."])
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process = self.process()
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# Get the number of threads
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num_threads = process.GetNumThreads()
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# Using std::thread may involve extra threads, so we assert that there are
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# at least 10 thread3's rather than exactly 10.
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self.assertTrue(
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num_threads >= 10,
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'Number of expected threads and actual threads do not match.')
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# Attempt to walk each of the thread's executing the thread3 function to
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# the same breakpoint.
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def is_thread3(thread):
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for frame in thread:
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if frame.GetFunctionName() is None:
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continue
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if "thread3" in frame.GetFunctionName(): return True
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return False
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expect_threads = ""
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for i in range(num_threads):
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thread = process.GetThreadAtIndex(i)
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self.assertTrue(thread.IsValid())
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if not is_thread3(thread):
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continue
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# If we aren't stopped out the thread breakpoint try to resume.
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if thread.GetStopReason() != lldb.eStopReasonBreakpoint:
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self.runCmd("thread continue %d"%(i+1))
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self.assertStopReason(thread.GetStopReason(), lldb.eStopReasonBreakpoint)
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expect_threads += " #%d"%(i+1)
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# Construct our expected back trace string
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expect_string = "10 thread(s)%s" % (expect_threads)
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# Now that we are stopped, we should have 10 threads waiting in the
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# thread3 function. All of these threads should show as one stack.
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self.expect("thread backtrace unique",
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"Backtrace with unique stack shown correctly",
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substrs=[expect_string,
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"main.cpp:%d"%self.thread3_before_lock_line])
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