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# TestInOutVariables.py This source file is part of the Swift.org open source project
#
# Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
# Licensed under Apache License v2.0 with Runtime Library Exception
#
# See https://swift.org/LICENSE.txt for license information
# See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
#
# ------------------------------------------------------------------------------
"""
Test that @inout variables display reasonably
"""
import lldb
from lldbsuite.test.lldbtest import *
from lldbsuite.test.decorators import *
import lldbsuite.test.lldbutil as lldbutil
import os
import unittest2
class TestInOutVariables(TestBase):
@swiftTest
def test_in_out_variables(self):
"""Test that @inout variables display reasonably"""
self.build()
self.do_test()
def setUp(self):
TestBase.setUp(self)
self.main_source = "main.swift"
self.main_source_spec = lldb.SBFileSpec(self.main_source)
def check_class_internal(
self,
ivar_value,
ovar_value,
use_expression,
is_wrapped):
"""is_wrapped allows unwrapping of an inout type.
These are currently not generated by the compiler"""
if use_expression:
# At present the expression parser strips off the @lvalue bit:
message_end = "from EvaluateExpression"
x_actual = self.frame().EvaluateExpression(
"x", lldb.eDynamicCanRunTarget)
self.assertSuccess(
x_actual.GetError(),
"Expression evaluation failed")
else:
message_end = "from FindVariable"
x = self.frame().FindVariable("x").GetDynamicValue(
lldb.eDynamicCanRunTarget)
self.assertTrue(x.IsValid(), "did not find x %s" % (message_end))
if is_wrapped:
self.assertTrue(
x.GetNumChildren() == 1,
"x has too many children %s" %
(message_end))
x_actual = x.GetChildAtIndex(0).GetDynamicValue(
lldb.eDynamicCanRunTarget)
self.assertTrue(
x_actual.IsValid(),
"did not find the child of x %s" %
(message_end))
else:
x_actual = x
ivar = x_actual.GetChildAtIndex(0).GetChildAtIndex(0)
ovar = x_actual.GetChildAtIndex(1)
self.assertEqual(
ivar.GetName(), "ivar", "Name: %s is not ivar %s" %
(ivar.GetName(), message_end))
self.assertEqual(
ovar.GetName(), "ovar",
"ovar is not ovar %s" %
(message_end))
self.assertEqual(
ivar.GetValue(), ivar_value,
"ivar wrong %s" %
(message_end))
self.assertEqual(
ovar.GetValue(), ovar_value,
"ovar wrong %s" %
(message_end))
def check_class(self, ivar_value, ovar_value, is_wrapped=False):
self.check_class_internal(ivar_value, ovar_value, True, is_wrapped)
self.check_class_internal(ivar_value, ovar_value, False, is_wrapped)
def check_struct_internal(self, ivar_value, use_expression):
if use_expression:
x = self.frame().EvaluateExpression("x", lldb.eDynamicCanRunTarget)
message_end = "from EvaluateExpression"
else:
x = self.frame().FindVariable("x").GetDynamicValue(
lldb.eDynamicCanRunTarget)
message_end = "from FindVariable"
# Make sure we can get the object description without crashing
_ = self.frame().FindVariable("x").description
self.assertTrue(x.IsValid(), "did not find x %s" % (message_end))
self.assertTrue(
x.GetNumChildren() == 1,
"x has too many children %s" %
(message_end))
ivar = x.GetChildAtIndex(0)
if not "unwrap":
if not use_expression:
ivar = ivar.GetChildAtIndex(0)
self.assertTrue(
ivar.GetName() == "ivar",
"ivar is not ivar %s" %
(message_end))
self.assertTrue(
ivar.GetValue() == ivar_value,
"ivar wrong %s" %
(message_end))
def check_struct(self, ivar_value):
self.check_struct_internal(ivar_value, True)
self.check_struct_internal(ivar_value, False)
def check_next_stop(self, breakpoint):
threads = lldbutil.get_threads_stopped_at_breakpoint(
self.process, breakpoint)
self.assertTrue(len(threads) == 1)
def do_test(self):
"""Test that @inout variables display reasonably"""
exe_name = "a.out"
exe = self.getBuildArtifact(exe_name)
# Create the target
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
# Set the breakpoints
class_bkpt = target.BreakpointCreateBySourceRegex(
'Set breakpoint here for Class access', self.main_source_spec)
self.assertTrue(class_bkpt.GetNumLocations() > 0, VALID_BREAKPOINT)
struct_bkpt = target.BreakpointCreateBySourceRegex(
'Set breakpoint here for Struct access', self.main_source_spec)
self.assertTrue(struct_bkpt.GetNumLocations() > 0, VALID_BREAKPOINT)
outer_bkpt = target.BreakpointCreateBySourceRegex(
'Set breakpoint here for String access', self.main_source_spec)
self.assertTrue(outer_bkpt.GetNumLocations() > 0, VALID_BREAKPOINT)
fn_ptr_bkpt = target.BreakpointCreateBySourceRegex(
'Set breakpoint here for Function type with inout', self.main_source_spec)
self.assertTrue(fn_ptr_bkpt.GetNumLocations() > 0, VALID_BREAKPOINT)
# Launch the process, and do not stop at the entry point.
self.process = target.LaunchSimple(None, None, os.getcwd())
self.assertTrue(self.process, PROCESS_IS_VALID)
# Frame #0 should be at our breakpoint.
self.check_next_stop(class_bkpt)
self.check_class("4321", "112233")
self.process.Continue()
self.check_next_stop(struct_bkpt)
self.check_struct("4567")
self.process.Continue()
self.check_next_stop(class_bkpt)
self.check_class("4322", "112233")
# Now on the way out let's modify the class and make sure it gets
# modified both here and outside the functions:
var = self.frame().EvaluateExpression(
"x = Other(in1: 556678, in2: 667788)",
lldb.eDynamicCanRunTarget)
self.assertSuccess(var.GetError())
#self.check_class("556677", "667788")
self.process.Continue()
self.check_next_stop(outer_bkpt)
svar = self.frame().FindVariable("x")
if not "unwrap":
svar = svar.GetChildAtIndex(0)
self.assertTrue(svar.GetSummary() == '"Keep going, nothing to see"')
self.process.Continue()
self.check_next_stop(class_bkpt)
self.check_class("556679", "667788")
self.process.Continue()
self.check_next_stop(struct_bkpt)
self.check_struct("4568")
# Now we want to run to the fn_ptrs breakpoint.
struct_bkpt.SetEnabled(False)
class_bkpt.SetEnabled(False)
outer_bkpt.SetEnabled(False)
self.process.Continue()
self.check_next_stop(fn_ptr_bkpt)
dict_var = self.frame().FindVariable("dict").GetChildAtIndex(0)
self.assertTrue(dict_var.IsValid(), "Got an invalid value for the first element: %s"%(dict_var.GetError().GetCString()))
func_value = dict_var.GetChildMemberWithName("value")
self.assertTrue(func_value.IsValid(), "Got an invalid value for func ptr: %s"%(func_value.GetError().GetCString()))
func_sc = target.ResolveSymbolContextForAddress(target.ResolveLoadAddress(func_value.GetValueAsUnsigned()), lldb.eSymbolContextFunction)
self.assertTrue(func_sc.GetFunction().IsValid(), "We couldn't look up the function target.")
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