lldb/test/expression_command/call-function/TestCallStopAndContinue.py

"""
Test calling a function, stopping in the call, continue and gather the result on stop.
"""

from __future__ import print_function

import lldb_shared

import lldb
import lldbutil
from lldbtest import *

class ExprCommandCallStopContinueTestCase(TestBase):

    mydir = TestBase.compute_mydir(__file__)

    def setUp(self):
        # Call super's setUp().
        TestBase.setUp(self)
        # Find the line number to break for main.c.
        self.line = line_number('main.cpp',
                                '// Please test these expressions while stopped at this line:')
        self.func_line = line_number ('main.cpp', 
                                '{ 5, "five" }')

    @expectedFlakeyDarwin("llvm.org/pr20274")
    @expectedFailureWindows("llvm.org/pr24489: Name lookup not working correctly on Windows")
    def test(self):
        """Test gathering result from interrupted function call."""
        self.build()
        self.runCmd("file a.out", CURRENT_EXECUTABLE_SET)

        # Some versions of GCC encode two locations for the 'return' statement in main.cpp
        lldbutil.run_break_set_by_file_and_line (self, "main.cpp", self.line, num_expected_locations=-1, loc_exact=True)

        self.runCmd("run", RUN_SUCCEEDED)

        lldbutil.run_break_set_by_file_and_line (self, "main.cpp", self.func_line, num_expected_locations=-1, loc_exact=True)
        
        self.expect("expr -i false -- returnsFive()", error=True,
            substrs = ['Execution was interrupted, reason: breakpoint'])

        self.runCmd("continue", "Continue completed")
        self.expect ("thread list",
                     substrs = ['stop reason = User Expression thread plan',
                                r'Completed expression: (Five) $0 = (number = 5, name = "five")'])