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# TestSwiftGlobals.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
#
# ------------------------------------------------------------------------------
"""
Check that we can examine module globals in the expression parser.
"""
import lldb
from lldbsuite.test.lldbtest import *
from lldbsuite.test.decorators import *
import lldbsuite.test.lldbutil as lldbutil
import os
import unittest2
class TestSwiftGlobals(TestBase):
@swiftTest
def test_swift_globals(self):
"""Check that we can examine module globals in the expression parser"""
self.build()
exe_name = "a.out"
exe = self.getBuildArtifact(exe_name)
# Create the target
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
# Target variables. This is not actually expected to work, but
# also shouldn't crash.
g_counter = target.EvaluateExpression("g_counter")
self.assertTrue(
g_counter.IsValid(),
"g_counter returned a valid value object.")
# Set the breakpoints
main_source_spec = lldb.SBFileSpec('main.swift')
outer_bkpt = target.BreakpointCreateBySourceRegex(
'Set top_level breakpoint here', main_source_spec)
self.assertGreater(outer_bkpt.GetNumLocations(), 0, VALID_BREAKPOINT)
function_bkpt = target.BreakpointCreateBySourceRegex(
'Set function breakpoint here', main_source_spec)
self.assertGreater(function_bkpt.GetNumLocations(), 0, VALID_BREAKPOINT)
# Launch the process, and do not stop at the entry point.
process = target.LaunchSimple(None, None, os.getcwd())
self.assertTrue(process, PROCESS_IS_VALID)
# Frame #0 should be at our breakpoint.
threads = lldbutil.get_threads_stopped_at_breakpoint(
process, outer_bkpt)
self.assertEqual(len(threads), 1)
self.thread = threads[0]
# All the variables should be uninitialized at this point. Maybe sure
# they look that way:
frame = self.thread.frames[0]
options = lldb.SBExpressionOptions()
options.SetFetchDynamicValue(lldb.eDynamicCanRunTarget)
error = lldb.SBError()
# Examine the variables before initialization:
g_counter = frame.EvaluateExpression("g_counter", options)
self.assertTrue(
g_counter.IsValid(),
"g_counter returned a valid value object.")
value = g_counter.GetValueAsSigned(error)
self.assertSuccess(error, "Got a value for g_counter")
self.assertEqual(value, 0,
"g_counter value is the uninitialized one.")
foo_var = frame.EvaluateExpression("my_foo", options)
self.assertTrue(
foo_var.IsValid(),
"foo_var returned a valid value object.")
value = foo_var.GetValueAsUnsigned(error)
self.assertSuccess(error, "foo_var has a value.")
self.assertEqual(value, 0, "foo_var is null before initialization.")
my_large_dude = frame.EvaluateExpression("my_large_dude", options)
self.assertTrue(my_large_dude.IsValid(),
"my_large_dude returned a valid value object.")
value = my_large_dude.GetValue()
self.assertSuccess(error, "Got a value for my_large_dude")
self.assertIsNone(
value,
"my_large_dude value is the uninitialized one.")
# Now proceed to the breakpoint in our main function, make sure we can
# still read these variables and they now have the right values.
threads = lldbutil.continue_to_breakpoint(process, function_bkpt)
self.assertEqual(len(threads), 1)
self.thread = threads[0]
# Examine the variables before initialization:
g_counter = frame.EvaluateExpression("g_counter", options)
self.assertTrue(
g_counter.IsValid(),
"g_counter returned a valid value object.")
value = g_counter.GetValueAsSigned(error)
self.assertSuccess(error, "Got a value for g_counter")
self.assertTrue(value == 2, "g_counter value should be 2.")
foo_var = frame.EvaluateExpression("my_foo", options)
self.assertTrue(
foo_var.IsValid(),
"foo_var returned a valid value object.")
foo_var_x = foo_var.GetChildMemberWithName("x")
self.assertTrue(foo_var_x.IsValid(), "Got value object for foo_var.x")
value = foo_var_x.GetValueAsUnsigned(error)
self.assertSuccess(error, "foo_var.x has a value.")
self.assertEqual(value, 1, "foo_var is null before initialization.")
my_large_dude = frame.EvaluateExpression("my_large_dude", options)
self.assertTrue(my_large_dude.IsValid(),
"my_large_dude returned a valid value object.")
my_large_dude_y = my_large_dude.GetChildMemberWithName("y")
self.assertTrue(
my_large_dude_y.IsValid(),
"Got value object for my_large_dude.y")
value = my_large_dude_y.GetValueAsUnsigned(error)
self.assertSuccess(error, "Got a value for my_large_dude.y")
self.assertEqual(
value, 20,
"my_large_dude value is the uninitialized one.")
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