lldb/test/functionalities/breakpoint/breakpoint_command/TestBreakpointCommandsFromPython.py

"""
Test that you can set breakpoint commands successfully with the Python API's:
"""

import os
import re
import unittest2
import lldb, lldbutil
import sys
from lldbtest import *

class PythonBreakpointCommandSettingTestCase(TestBase):

    mydir = TestBase.compute_mydir(__file__)
    my_var = 10

    @python_api_test
    def test_step_out_python(self):
        """Test stepping out using avoid-no-debug with dsyms."""
        self.build()
        self.do_set_python_command_from_python ()

    def setUp (self):
        TestBase.setUp(self)
        self.main_source = "main.c"
        self.main_source_spec = lldb.SBFileSpec(self.main_source)


    def do_set_python_command_from_python (self):
        exe = os.path.join(os.getcwd(), "a.out")
        error = lldb.SBError()

        self.target = self.dbg.CreateTarget(exe)
        self.assertTrue(self.target, VALID_TARGET)

        body_bkpt = self.target.BreakpointCreateBySourceRegex("Set break point at this line.", self.main_source_spec)
        self.assertTrue(body_bkpt, VALID_BREAKPOINT)

        func_bkpt = self.target.BreakpointCreateBySourceRegex("Set break point at this line.", self.main_source_spec)
        self.assertTrue(func_bkpt, VALID_BREAKPOINT)

        # Also test that setting a source regex breakpoint with an empty file spec list sets it on all files:
        no_files_bkpt = self.target.BreakpointCreateBySourceRegex("Set a breakpoint here", lldb.SBFileSpecList(), lldb.SBFileSpecList())
        self.assertTrue(no_files_bkpt, VALID_BREAKPOINT)
        num_locations = no_files_bkpt.GetNumLocations()
        self.assertTrue(num_locations >= 2, "Got at least two breakpoint locations")
        got_one_in_A = False
        got_one_in_B = False
        for idx in range(0, num_locations):
            comp_unit = no_files_bkpt.GetLocationAtIndex(idx).GetAddress().GetSymbolContext(lldb.eSymbolContextCompUnit).GetCompileUnit().GetFileSpec()
            print "Got comp unit: ", comp_unit.GetFilename()
            if comp_unit.GetFilename() == "a.c":
                got_one_in_A = True
            elif comp_unit.GetFilename() == "b.c":
                got_one_in_B = True

        self.assertTrue(got_one_in_A, "Failed to match the pattern in A")
        self.assertTrue(got_one_in_B, "Failed to match the pattern in B")
        self.target.BreakpointDelete(no_files_bkpt.GetID())

        PythonBreakpointCommandSettingTestCase.my_var = 10
        error = lldb.SBError()
        error = body_bkpt.SetScriptCallbackBody("\
import TestBreakpointCommandsFromPython\n\
TestBreakpointCommandsFromPython.PythonBreakpointCommandSettingTestCase.my_var = 20\n\
print 'Hit breakpoint'")
        self.assertTrue (error.Success(), "Failed to set the script callback body: %s."%(error.GetCString()))

        self.dbg.HandleCommand("command script import --allow-reload ./bktptcmd.py")
        func_bkpt.SetScriptCallbackFunction("bktptcmd.function")

        # We will use the function that touches a text file, so remove it first:
        self.RemoveTempFile("output2.txt")

        # Now launch the process, and do not stop at entry point.
        self.process = self.target.LaunchSimple (None, None, self.get_process_working_directory())

        self.assertTrue(self.process, PROCESS_IS_VALID)

        # Now finish, and make sure the return value is correct.
        threads = lldbutil.get_threads_stopped_at_breakpoint (self.process, body_bkpt)
        self.assertTrue(len(threads) == 1, "Stopped at inner breakpoint.")
        self.thread = threads[0]
    
        self.assertTrue(PythonBreakpointCommandSettingTestCase.my_var == 20)

        # Check for the function version as well, which produced this file:
        # Remember to clean up after ourselves...
        self.assertTrue(os.path.isfile("output2.txt"),
                        "'output2.txt' exists due to breakpoint command for breakpoint function.")
        self.RemoveTempFile("output2.txt")

        
if __name__ == '__main__':
    import atexit
    lldb.SBDebugger.Initialize()
    atexit.register(lambda: lldb.SBDebugger.Terminate())
    unittest2.main()