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"""
Test thread creation after process attach.
"""
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class CreateAfterAttachTestCase(TestBase):
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
# Find the line numbers for our breakpoints.
self.break_1 = line_number("main.cpp", "// Set first breakpoint here")
self.break_2 = line_number("main.cpp", "// Set second breakpoint here")
self.break_3 = line_number("main.cpp", "// Set third breakpoint here")
# Occasionally hangs on Windows, may be same as other issues.
@skipIfWindows
@skipIfiOSSimulator
@expectedFailureNetBSD
def test_create_after_attach(self):
"""Test thread creation after process attach."""
self.build()
exe = self.getBuildArtifact("a.out")
# Spawn a new process
# use realpath to workaround llvm.org/pr48376
popen = self.spawnSubprocess(os.path.realpath(exe))
pid = popen.pid
# Attach to the spawned process
self.runCmd("process attach -p " + str(pid))
target = self.dbg.GetSelectedTarget()
process = target.GetProcess()
self.assertTrue(process, PROCESS_IS_VALID)
# This should create a breakpoint in the main thread.
lldbutil.run_break_set_by_file_and_line(
self, "main.cpp", self.break_1, num_expected_locations=1
)
# This should create a breakpoint in the second child thread.
lldbutil.run_break_set_by_file_and_line(
self, "main.cpp", self.break_2, num_expected_locations=1
)
# This should create a breakpoint in the first child thread.
lldbutil.run_break_set_by_file_and_line(
self, "main.cpp", self.break_3, num_expected_locations=1
)
# Note: With std::thread, we cannot rely on particular thread numbers. Using
# std::thread may cause the program to spin up a thread pool (and it does on
# Windows), so the thread numbers are non-deterministic.
# Run to the first breakpoint
self.runCmd("continue")
# The stop reason of the thread should be breakpoint.
self.expect(
"thread list",
STOPPED_DUE_TO_BREAKPOINT,
substrs=["stopped", "* thread #", "main", "stop reason = breakpoint"],
)
# Change a variable to escape the loop
self.runCmd("expression main_thread_continue = 1")
# Run to the second breakpoint
self.runCmd("continue")
# The stop reason of the thread should be breakpoint.
self.expect(
"thread list",
STOPPED_DUE_TO_BREAKPOINT,
substrs=[
"stopped",
"* thread #",
"thread_2_func",
"stop reason = breakpoint",
],
)
# Change a variable to escape the loop
self.runCmd("expression child_thread_continue = 1")
# Run to the third breakpoint
self.runCmd("continue")
# The stop reason of the thread should be breakpoint.
# Thread 3 may or may not have already exited.
self.expect(
"thread list",
STOPPED_DUE_TO_BREAKPOINT,
substrs=[
"stopped",
"* thread #",
"thread_1_func",
"stop reason = breakpoint",
],
)
# Run to completion
self.runCmd("continue")
# At this point, the inferior process should have exited.
self.assertEqual(process.GetState(), lldb.eStateExited, PROCESS_EXITED)
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