"""
Test number of threads.
"""

from __future__ import print_function


import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
import lldbsuite.test.lldbutil as lldbutil


class ThreadExitTestCase(TestBase):

    mydir = TestBase.compute_mydir(__file__)

    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')
        self.break_4 = line_number('main.cpp', '// Set fourth breakpoint here')

    @skipIfWindows # This is flakey on Windows: llvm.org/pr38373
    def test(self):
        """Test thread exit handling."""
        self.build(dictionary=self.getBuildFlags())
        exe = self.getBuildArtifact("a.out")
        self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)

        # This should create a breakpoint with 1 location.
        bp1_id = lldbutil.run_break_set_by_file_and_line(
            self, "main.cpp", self.break_1, num_expected_locations=1)
        bp2_id = lldbutil.run_break_set_by_file_and_line(
            self, "main.cpp", self.break_2, num_expected_locations=1)
        bp3_id = lldbutil.run_break_set_by_file_and_line(
            self, "main.cpp", self.break_3, num_expected_locations=1)
        bp4_id = lldbutil.run_break_set_by_file_and_line(
            self, "main.cpp", self.break_4, num_expected_locations=1)

        # The breakpoint list should show 1 locations.
        self.expect(
            "breakpoint list -f",
            "Breakpoint location shown correctly",
            substrs=[
                "1: file = 'main.cpp', line = %d, exact_match = 0, locations = 1" %
                self.break_1,
                "2: file = 'main.cpp', line = %d, exact_match = 0, locations = 1" %
                self.break_2,
                "3: file = 'main.cpp', line = %d, exact_match = 0, locations = 1" %
                self.break_3,
                "4: file = 'main.cpp', line = %d, exact_match = 0, locations = 1" %
                self.break_4])

        # Run the program.
        self.runCmd("run", RUN_SUCCEEDED)
        # Get the target process
        target = self.dbg.GetSelectedTarget()
        process = target.GetProcess()

        stopped_thread = lldbutil.get_one_thread_stopped_at_breakpoint_id(
            process, bp1_id)
        self.assertIsNotNone(stopped_thread,
                             "Process is not stopped at breakpoint 1")

        # Get the number of threads
        num_threads = process.GetNumThreads()
        self.assertGreaterEqual(
            num_threads,
            2,
            'Number of expected threads and actual threads do not match at breakpoint 1.')

        # Run to the second breakpoint
        self.runCmd("continue")
        stopped_thread = lldbutil.get_one_thread_stopped_at_breakpoint_id(
            process, bp2_id)
        self.assertIsNotNone(stopped_thread,
                             "Process is not stopped at breakpoint 2")

        # Update the number of threads
        new_num_threads = process.GetNumThreads()
        self.assertEqual(
            new_num_threads,
            num_threads + 1,
            'Number of expected threads did not increase by 1 at bp 2.')

        # Run to the third breakpoint
        self.runCmd("continue")
        stopped_thread = lldbutil.get_one_thread_stopped_at_breakpoint_id(
            process, bp3_id)
        self.assertIsNotNone(stopped_thread,
                             "Process is not stopped at breakpoint 3")

        # Update the number of threads
        new_num_threads = process.GetNumThreads()
        self.assertEqual(
            new_num_threads,
            num_threads,
            'Number of expected threads is not equal to original number of threads at bp 3.')

        # Run to the fourth breakpoint
        self.runCmd("continue")
        stopped_thread = lldbutil.get_one_thread_stopped_at_breakpoint_id(
            process, bp4_id)
        self.assertIsNotNone(stopped_thread,
                             "Process is not stopped at breakpoint 4")

        # Update the number of threads
        new_num_threads = process.GetNumThreads()
        self.assertEqual(
            new_num_threads,
            num_threads - 1,
            'Number of expected threads did not decrease by 1 at bp 4.')

        # Run to completion
        self.runCmd("continue")

        # At this point, the inferior process should have exited.
        self.assertEqual(process.GetState(), lldb.eStateExited, PROCESS_EXITED)
