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"""
Test thread creation after process attach.
"""
import lldb_shared
import os, time
import lldb
from lldbtest import *
import lldbutil
class CreateAfterAttachTestCase(TestBase):
mydir = TestBase.compute_mydir(__file__)
@skipIfFreeBSD # Hangs. May be the same as Linux issue llvm.org/pr16229 but
# not yet investigated. Revisit once required functionality
# is implemented for FreeBSD.
@skipIfWindows # Occasionally hangs on Windows, may be same as other issues.
def test_create_after_attach_with_popen(self):
"""Test thread creation after process attach."""
self.build(dictionary=self.getBuildFlags(use_cpp11=False))
self.create_after_attach(use_fork=False)
@skipIfFreeBSD # Hangs. Revisit once required functionality is implemented
# for FreeBSD.
@skipIfRemote
@skipIfWindows # Windows doesn't have fork.
@expectedFlakeyLinux("llvm.org/pr16229") # 1/100 dosep, build 3546, clang-3.5 x84_64
def test_create_after_attach_with_fork(self):
"""Test thread creation after process attach."""
self.build(dictionary=self.getBuildFlags(use_cpp11=False))
self.create_after_attach(use_fork=True)
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')
def create_after_attach(self, use_fork):
"""Test thread creation after process attach."""
exe = os.path.join(os.getcwd(), "a.out")
# Spawn a new process
if use_fork:
pid = self.forkSubprocess(exe)
else:
popen = self.spawnSubprocess(exe)
pid = popen.pid
self.addTearDownHook(self.cleanupSubprocesses)
# 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.assertTrue(process.GetState() == lldb.eStateExited, PROCESS_EXITED)
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