"""
Test number of threads.
"""
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class ExitDuringStepTestCase(TestBase):
@skipIfWindows # This is flakey on Windows: llvm.org/pr38373
def test(self):
"""Test thread exit during step handling."""
self.build()
self.exit_during_step_base(
"thread step-inst -m all-threads", "stop reason = instruction step", True
)
@skipIfWindows # This is flakey on Windows: llvm.org/pr38373
def test_step_over(self):
"""Test thread exit during step-over handling."""
self.build()
self.exit_during_step_base(
"thread step-over -m all-threads", "stop reason = step over", False
)
@skipIfWindows # This is flakey on Windows: llvm.org/pr38373
def test_step_in(self):
"""Test thread exit during step-in handling."""
self.build()
self.exit_during_step_base(
"thread step-in -m all-threads", "stop reason = step in", False
)
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
# Find the line numbers to break and continue.
self.breakpoint = line_number("main.cpp", "// Set breakpoint here")
self.continuepoint = line_number("main.cpp", "// Continue from here")
def exit_during_step_base(self, step_cmd, step_stop_reason, by_instruction):
"""Test thread exit during step handling."""
exe = self.getBuildArtifact("a.out")
self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
# This should create a breakpoint in the main thread.
self.bp_num = lldbutil.run_break_set_by_file_and_line(
self, "main.cpp", self.breakpoint, num_expected_locations=1
)
# The breakpoint list should show 1 location.
self.expect(
"breakpoint list -f",
"Breakpoint location shown correctly",
substrs=[
"1: file = 'main.cpp', line = %d, exact_match = 0, locations = 1"
% self.breakpoint
],
)
# Run the program.
self.runCmd("run", RUN_SUCCEEDED)
# The stop reason of the thread should be breakpoint.
self.expect(
"thread list",
STOPPED_DUE_TO_BREAKPOINT,
substrs=["stopped", "stop reason = breakpoint"],
)
# Get the target process
target = self.dbg.GetSelectedTarget()
process = target.GetProcess()
num_threads = process.GetNumThreads()
# Make sure we see all three threads
self.assertGreaterEqual(
num_threads,
3,
"Number of expected threads and actual threads do not match.",
)
stepping_thread = lldbutil.get_one_thread_stopped_at_breakpoint_id(
process, self.bp_num
)
self.assertIsNotNone(
stepping_thread, "Could not find a thread stopped at the breakpoint"
)
current_line = self.breakpoint
stepping_frame = stepping_thread.GetFrameAtIndex(0)
self.assertEqual(
current_line,
stepping_frame.GetLineEntry().GetLine(),
"Starting line for stepping doesn't match breakpoint line.",
)
# Keep stepping until we've reached our designated continue point
while current_line != self.continuepoint:
# Since we're using the command interpreter to issue the thread command
# (on the selected thread) we need to ensure the selected thread is the
# stepping thread.
if stepping_thread != process.GetSelectedThread():
process.SetSelectedThread(stepping_thread)
self.runCmd(step_cmd)
frame = stepping_thread.GetFrameAtIndex(0)
current_line = frame.GetLineEntry().GetLine()
if by_instruction and current_line == 0:
continue
self.assertGreaterEqual(
current_line,
self.breakpoint,
"Stepped to unexpected line, " + str(current_line),
)
self.assertLessEqual(
current_line,
self.continuepoint,
"Stepped to unexpected line, " + str(current_line),
)
self.runCmd("thread list")
# Update the number of threads
new_num_threads = process.GetNumThreads()
# Check to see that we reduced the number of threads as expected
self.assertEqual(
new_num_threads,
num_threads - 1,
"Number of threads did not reduce by 1 after thread exit.",
)
self.expect(
"thread list",
"Process state is stopped due to step",
substrs=["stopped", step_stop_reason],
)
# Run to completion
self.runCmd("continue")
# At this point, the inferior process should have exited.
self.assertState(process.GetState(), lldb.eStateExited, PROCESS_EXITED)
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