public void TestAccessAfterSendInCallee()
{
var test = @"
using Microsoft.PSharp;
namespace Foo {
class eUnit : Event
{
public int Value;
public eUnit(int value)
: base()
{
this.Value = value;
}
}
class M : Machine
{
MachineId Target;
[Start]
[OnEntry(nameof(FirstOnEntryAction))]
class First : MachineState { }
void FirstOnEntryAction()
{
int value = 0;
this.Target = this.CreateMachine(typeof(M));
this.Foo(value);
}
void Foo(int value)
{
this.Send(this.Target, new eUnit(value));
value = 1;
}
}
}";
var configuration = base.GetConfiguration();
IO.StartWritingToMemory();
var context = CompilationContext.Create(configuration).LoadSolution(test, "cs");
ParsingEngine.Create(context).Run();
RewritingEngine.Create(context).Run();
AnalysisErrorReporter.ResetStats();
StaticAnalysisEngine.Create(context).Run();
var stats = AnalysisErrorReporter.GetStats();
var expected = "No static analysis errors detected.";
Assert.AreEqual(expected.Replace(Environment.NewLine, string.Empty), stats);
IO.StopWritingToMemory();
}
public void TestPublicFieldVisibility()
{
var test = @"
using Microsoft.PSharp;
namespace Foo {
class M : Machine
{
public int Num;
[Start]
[OnEntry(nameof(FirstOnEntryAction))]
class First : MachineState { }
void FirstOnEntryAction()
{
this.Num = 1;
}
}
}";
var configuration = base.GetConfiguration();
IO.StartWritingToMemory();
var context = CompilationContext.Create(configuration).LoadSolution(test, "cs");
ParsingEngine.Create(context).Run();
RewritingEngine.Create(context).Run();
ErrorReporter.ShowWarnings = true;
AnalysisErrorReporter.ResetStats();
StaticAnalysisEngine.Create(context).Run();
var stats = AnalysisErrorReporter.GetStats();
var expected = "Static analysis detected '0' errors and '1' warning.";
Assert.AreEqual(expected.Replace(Environment.NewLine, string.Empty), stats);
Console.WriteLine(IO.GetOutput());
var error = "Warning: Field 'int Num' of machine 'Foo.M' is declared as " +
"'public'. at 'public int Num;' in Program.cs:line 7";
Assert.AreEqual(error.Replace(Environment.NewLine, string.Empty),
IO.GetOutput().Replace(Environment.NewLine, string.Empty));
IO.StopWritingToMemory();
}
public void TestBasicLoop()
{
var test = @"
using Microsoft.PSharp;
namespace Foo {
class M : Machine
{
[Start]
[OnEntry(nameof(FirstOnEntryAction))]
class First : MachineState { }
void FirstOnEntryAction()
{
int k = 10;
for (int i = 0; i < k; i++) { k = 2; }
k = 3;
}
}
}";
var configuration = base.GetConfiguration();
IO.StartWritingToMemory();
var context = CompilationContext.Create(configuration).LoadSolution(test, "cs");
ParsingEngine.Create(context).Run();
RewritingEngine.Create(context).Run();
AnalysisErrorReporter.ResetStats();
StaticAnalysisEngine.Create(context).Run();
var stats = AnalysisErrorReporter.GetStats();
var expected = "No static analysis errors detected.";
Assert.AreEqual(expected.Replace(Environment.NewLine, string.Empty), stats);
IO.StopWritingToMemory();
}
public void TestMemberVisibility()
{
var test = @"
namespace Foo {
class M : Machine
{
int Num;
[Start]
[OnEntry(nameof(FirstOnEntryAction))]
class First : MachineState { }
void FirstOnEntryAction()
{
this.Num = 1;
}
}
}";
var configuration = base.GetConfiguration();
IO.StartWritingToMemory();
var context = CompilationContext.Create(configuration).LoadSolution(test, "cs");
ParsingEngine.Create(context).Run();
RewritingEngine.Create(context).Run();
AnalysisErrorReporter.ResetStats();
StaticAnalysisEngine.Create(context).Run();
var stats = AnalysisErrorReporter.GetStats();
var expected = "No static analysis errors detected.";
Assert.AreEqual(expected.Replace(Environment.NewLine, string.Empty), stats);
IO.StopWritingToMemory();
}
public void TestComplexAccessesInCall10Fail()
{
var test = @"
using Microsoft.PSharp;
namespace Foo {
class eUnit : Event
{
public Letter Letter;
public eUnit(Letter letter)
: base()
{
this.Letter = letter;
}
}
struct Letter
{
public string Text;
public Letter(string text)
{
this.Text = text;
}
}
class OtherClass
{
internal Letter Letter;
public void Foo(Letter letter)
{
this.Letter = letter;
}
}
class M : Machine
{
MachineId Target;
Letter Letter;
OtherClass OC;
[Start]
[OnEntry(nameof(FirstOnEntryAction))]
class First : MachineState { }
void FirstOnEntryAction()
{
this.Target = this.CreateMachine(typeof(M));
Letter letter = new Letter(""London"");
var oc = new OtherClass();
oc.Foo(letter);
this.OC = oc;
this.Send(this.Target, new eUnit(letter)); // ERROR
}
}
}";
var configuration = base.GetConfiguration();
configuration.DoStateTransitionAnalysis = false;
IO.StartWritingToMemory();
var context = CompilationContext.Create(configuration).LoadSolution(test, "cs");
ParsingEngine.Create(context).Run();
RewritingEngine.Create(context).Run();
AnalysisErrorReporter.ResetStats();
StaticAnalysisEngine.Create(context).Run();
var stats = AnalysisErrorReporter.GetStats();
var expected = "Static analysis detected '1' error.";
Assert.AreEqual(expected.Replace(Environment.NewLine, string.Empty), stats);
var error = "Error: Method 'FirstOnEntryAction' of machine 'Foo.M' sends " +
"'letter', which contains data from field 'letter'.";
var actual = IO.GetOutput();
Assert.AreEqual(error.Replace(Environment.NewLine, string.Empty),
actual.Substring(0, actual.IndexOf(Environment.NewLine)));
IO.StopWritingToMemory();
}
public void TestComplexAccessesInCall1Fail()
{
var test = @"
using Microsoft.PSharp;
namespace Foo {
class eUnit : Event
{
public Envelope Envelope;
public eUnit(Envelope envelope)
: base()
{
this.Envelope = envelope;
}
}
struct Letter
{
public string Text;
public Letter(string text)
{
this.Text = text;
}
}
struct Envelope
{
public Letter Letter;
public string Address;
public int Id;
public Envelope(string address, int id)
{
this.Letter = new Letter("""");
this.Address = address;
this.Id = id;
}
}
class M : Machine
{
MachineId Target;
Letter Letter;
[Start]
[OnEntry(nameof(FirstOnEntryAction))]
class First : MachineState { }
void FirstOnEntryAction()
{
this.Target = this.CreateMachine(typeof(M));
Envelope envelope = new Envelope(""London"", 0);
Envelope otherEnvelope = envelope;
this.Foo(otherEnvelope);
this.Send(this.Target, new eUnit(envelope));
this.Bar(otherEnvelope.Letter);
otherEnvelope.Letter.Text = ""text""; // ERROR
envelope = new Envelope();
this.FooBar(envelope, otherEnvelope.Letter);
}
void Foo(Envelope envelope)
{
this.Letter = envelope.Letter; // ERROR
}
void Bar(Letter letter)
{
letter.Text = ""text2""; // ERROR
}
void FooBar(Envelope envelope, Letter letter)
{
string str = letter.Text; // ERROR
envelope.Id = 5;
}
}
}";
var configuration = base.GetConfiguration();
configuration.DoStateTransitionAnalysis = false;
IO.StartWritingToMemory();
var context = CompilationContext.Create(configuration).LoadSolution(test, "cs");
ParsingEngine.Create(context).Run();
RewritingEngine.Create(context).Run();
AnalysisErrorReporter.ResetStats();
StaticAnalysisEngine.Create(context).Run();
var stats = AnalysisErrorReporter.GetStats();
var expected = "Static analysis detected '4' errors.";
Assert.AreEqual(expected.Replace(Environment.NewLine, string.Empty), stats);
IO.StopWritingToMemory();
}
public void TestFieldSendAlias()
{
var test = @"
using Microsoft.PSharp;
namespace Foo {
class eUnit : Event
{
public Letter Letter;
public eUnit(Letter letter)
: base()
{
this.Letter = letter;
}
}
struct Letter
{
public string Text;
public int Num;
public Letter(string text, int num)
{
this.Text = text;
this.Num = num;
}
}
class M : Machine
{
MachineId Target;
Letter Letter;
[Start]
[OnEntry(nameof(FirstOnEntryAction))]
class First : MachineState { }
void FirstOnEntryAction()
{
var letter = new Letter(""test"", 0);
this.Target = this.CreateMachine(typeof(M));
var otherLetter = letter;
letter = this.Foo(letter);
this.Send(this.Target, new eUnit(otherLetter));
}
Letter Foo(Letter letter)
{
return this.Bar(letter);
}
Letter Bar(Letter letter)
{
Letter otherLetter = new Letter(""test"", 0);
otherLetter = this.Letter;
return otherLetter;
}
}
}";
var configuration = base.GetConfiguration();
IO.StartWritingToMemory();
var context = CompilationContext.Create(configuration).LoadSolution(test, "cs");
ParsingEngine.Create(context).Run();
RewritingEngine.Create(context).Run();
AnalysisErrorReporter.ResetStats();
StaticAnalysisEngine.Create(context).Run();
var stats = AnalysisErrorReporter.GetStats();
var expected = "No static analysis errors detected.";
Assert.AreEqual(expected.Replace(Environment.NewLine, string.Empty), stats);
IO.StopWritingToMemory();
}
public void TestSwitchStatement()
{
var test = @"
using Microsoft.PSharp;
namespace Foo {
class eUnit : Event
{
public Letter Letter;
public eUnit(Letter letter)
: base()
{
this.Letter = letter;
}
}
struct Letter
{
public string Text;
public Letter(string text)
{
this.Text = text;
}
}
class M : Machine
{
MachineId Target;
int Num;
[Start]
[OnEntry(nameof(FirstOnEntryAction))]
class First : MachineState { }
void FirstOnEntryAction()
{
this.Target = this.CreateMachine(typeof(M));
var letter = new Letter(""London"");
this.Send(this.Target, new eUnit(letter));
switch (this.Num)
{
case 0:
case 1:
letter = new Letter(""Taipei"");
break;
case 2:
letter = new Letter(""Redmond"");
break;
default:
letter = new Letter(""Bangalore"");
break;
}
letter.Text = ""text"";
}
}
}";
var configuration = base.GetConfiguration();
IO.StartWritingToMemory();
var context = CompilationContext.Create(configuration).LoadSolution(test, "cs");
ParsingEngine.Create(context).Run();
RewritingEngine.Create(context).Run();
AnalysisErrorReporter.ResetStats();
StaticAnalysisEngine.Create(context).Run();
var stats = AnalysisErrorReporter.GetStats();
var expected = "No static analysis errors detected.";
Assert.AreEqual(expected.Replace(Environment.NewLine, string.Empty), stats);
IO.StopWritingToMemory();
}
public void TestResetGivenUpReferenceAfterSend1()
{
var test = @"
using Microsoft.PSharp;
namespace Foo {
class eUnit : Event
{
public Letter Letter;
public eUnit(Letter letter)
: base()
{
this.Letter = letter;
}
}
struct Letter
{
public string Text;
public Letter(string text)
{
this.Text = text;
}
}
class M : Machine
{
MachineId Target;
[Start]
[OnEntry(nameof(FirstOnEntryAction))]
class First : MachineState { }
void FirstOnEntryAction()
{
this.Target = this.CreateMachine(typeof(M));
var letter = new Letter(""London"");
this.Send(this.Target, new eUnit(letter));
letter = new Letter(""Bangalore"");
var text = letter.Text;
}
}
}";
var configuration = base.GetConfiguration();
configuration.ProjectName = "Test";
configuration.ThrowInternalExceptions = true;
configuration.Verbose = 2;
configuration.AnalyzeDataRaces = true;
IO.StartWritingToMemory();
var context = CompilationContext.Create(configuration).LoadSolution(test, "cs");
ParsingEngine.Create(context).Run();
RewritingEngine.Create(context).Run();
AnalysisErrorReporter.ResetStats();
StaticAnalysisEngine.Create(context).Run();
var stats = AnalysisErrorReporter.GetStats();
var expected = "No static analysis errors detected.";
Assert.AreEqual(expected.Replace(Environment.NewLine, string.Empty), stats);
IO.StopWritingToMemory();
}
public void TestWriteAccessAfterSendInCallee3Fail()
{
var test = @"
using Microsoft.PSharp;
namespace Foo {
class eUnit : Event
{
public Letter Letter;
public eUnit(Letter letter)
: base()
{
this.Letter = letter;
}
}
struct Letter
{
public string Text;
public int Num;
public Letter(string text, int num)
{
this.Text = text;
this.Num = num;
}
}
class M : Machine
{
MachineId Target;
Letter Letter;
[Start]
[OnEntry(nameof(FirstOnEntryAction))]
class First : MachineState { }
void FirstOnEntryAction()
{
var letter = new Letter(""test"", 0);
this.Target = this.CreateMachine(typeof(M));
this.Send(this.Target, new eUnit(letter));
this.Foo(letter);
}
void Foo(Letter letter)
{
this.Letter = letter; // ERROR
letter = new Letter(""test2"", 2);
this.Letter.Num = 1; // ERROR
int num = this.Letter.Num; // ERROR
letter.Text = ""Bangalore"";
this.Letter.Text = ""Taipei""; // ERROR
}
}
}";
var configuration = base.GetConfiguration();
configuration.DoStateTransitionAnalysis = false;
IO.StartWritingToMemory();
var context = CompilationContext.Create(configuration).LoadSolution(test, "cs");
ParsingEngine.Create(context).Run();
RewritingEngine.Create(context).Run();
AnalysisErrorReporter.ResetStats();
StaticAnalysisEngine.Create(context).Run();
var stats = AnalysisErrorReporter.GetStats();
var expected = "Static analysis detected '7' errors.";
Assert.AreEqual(expected.Replace(Environment.NewLine, string.Empty), stats);
IO.StopWritingToMemory();
}
public void TestAccessInVirtualMethod()
{
var test = @"
using Microsoft.PSharp;
namespace Foo {
class eUnit : Event
{
public Letter Letter;
public eUnit(Letter letter)
: base()
{
this.Letter = letter;
}
}
struct Letter
{
public string Text;
public Letter(string text)
{
this.Text = text;
}
}
internal class Envelope
{
internal Letter Letter;
internal virtual void Foo(Letter letter) { }
}
internal class SuperEnvelope : Envelope
{
internal override void Foo(Letter letter)
{
letter.Text = ""Bangalore"";
}
}
class M : Machine
{
MachineId Target;
[Start]
[OnEntry(nameof(FirstOnEntryAction))]
class First : MachineState { }
void FirstOnEntryAction()
{
var letter = new Letter(""London"");
this.Target = this.CreateMachine(typeof(M));
Envelope envelope = new Envelope();
this.Send(this.Target, new eUnit(letter));
envelope.Foo(letter);
}
}
}";
var configuration = base.GetConfiguration();
IO.StartWritingToMemory();
var context = CompilationContext.Create(configuration).LoadSolution(test, "cs");
ParsingEngine.Create(context).Run();
RewritingEngine.Create(context).Run();
AnalysisErrorReporter.ResetStats();
StaticAnalysisEngine.Create(context).Run();
var stats = AnalysisErrorReporter.GetStats();
var expected = "No static analysis errors detected.";
Assert.AreEqual(expected.Replace(Environment.NewLine, string.Empty), stats);
IO.StopWritingToMemory();
}
public void TestWriteAccessAfterSendInLoop9Fail()
{
var test = @"
using System.Collection.Generic;
using Microsoft.PSharp;
namespace Foo {
class eUnit : Event
{
public Letter Letter;
public eUnit(Letter letter)
: base()
{
this.Letter = letter;
}
}
struct Letter
{
public string Text;
public Letter(string text)
{
this.Text = text;
}
}
class M : Machine
{
MachineId Target;
[Start]
[OnEntry(nameof(FirstOnEntryAction))]
class First : MachineState { }
void FirstOnEntryAction()
{
var letter = new Letter(""London"");
this.Target = this.CreateMachine(typeof(M));
List<int> dummies = new List<int>();
foreach (var dummy in dummies)
{
letter.Text = ""Bangalore""; // ERROR
this.Send(this.Target, new eUnit(letter)); // ERROR
}
}
}
}";
var configuration = base.GetConfiguration();
IO.StartWritingToMemory();
var context = CompilationContext.Create(configuration).LoadSolution(test, "cs");
ParsingEngine.Create(context).Run();
RewritingEngine.Create(context).Run();
AnalysisErrorReporter.ResetStats();
StaticAnalysisEngine.Create(context).Run();
var stats = AnalysisErrorReporter.GetStats();
var expected = "Static analysis detected '2' errors and '1' warning.";
Assert.AreEqual(expected.Replace(Environment.NewLine, string.Empty), stats);
IO.StopWritingToMemory();
}
public void TestFieldGivenUpOwnership1Fail()
{
var test = @"
using Microsoft.PSharp;
namespace Foo {
class eUnit : Event
{
public Letter Letter;
public eUnit(Letter letter)
: base()
{
this.Letter = letter;
}
}
struct Letter
{
public string Text;
public Letter(string text)
{
this.Text = text;
}
}
class M : Machine
{
MachineId Target;
Letter Letter;
[Start]
[OnEntry(nameof(FirstOnEntryAction))]
class First : MachineState { }
void FirstOnEntryAction()
{
var letter = new Letter(""test"");
this.Target = this.CreateMachine(typeof(M));
this.Send(this.Target, new eUnit(letter));
this.Letter = letter;
}
}
}";
var configuration = base.GetConfiguration();
configuration.DoStateTransitionAnalysis = false;
IO.StartWritingToMemory();
var context = CompilationContext.Create(configuration).LoadSolution(test, "cs");
ParsingEngine.Create(context).Run();
RewritingEngine.Create(context).Run();
AnalysisErrorReporter.ResetStats();
StaticAnalysisEngine.Create(context).Run();
var stats = AnalysisErrorReporter.GetStats();
var expected = "Static analysis detected '1' error.";
Assert.AreEqual(expected.Replace(Environment.NewLine, string.Empty), stats);
var error = "Error: Method 'FirstOnEntryAction' of machine 'Foo.M' assigns " +
"'letter' to field 'Foo.M.Letter' after giving up its ownership.";
var actual = IO.GetOutput();
Assert.AreEqual(error.Replace(Environment.NewLine, string.Empty),
actual.Substring(0, actual.IndexOf(Environment.NewLine)));
IO.StopWritingToMemory();
}
public void TestFieldAccessAfterGivenUpOwnership2Fail()
{
var test = @"
using Microsoft.PSharp;
namespace Foo {
class eUnit : Event
{
public MachineId Target;
public Letter Letter;
public eUnit(MachineId target, Letter letter)
: base()
{
this.Target = target;
this.Letter = letter;
}
}
struct Letter
{
public string Text;
public int Num;
public Letter(string text, int num)
{
this.Text = text;
this.Num = num;
}
}
class M : Machine
{
MachineId Target;
Letter Letter;
[Start]
[OnEntry(nameof(FirstOnEntryAction))]
class First : MachineState { }
void FirstOnEntryAction()
{
this.Target = this.CreateMachine(typeof(M));
this.Send(this.Target, new eUnit(this.Id, this.Letter));
int num = this.Letter.Num;
this.Letter.Text = ""London"";
}
}
}";
var configuration = base.GetConfiguration();
configuration.DoStateTransitionAnalysis = false;
IO.StartWritingToMemory();
var context = CompilationContext.Create(configuration).LoadSolution(test, "cs");
ParsingEngine.Create(context).Run();
RewritingEngine.Create(context).Run();
AnalysisErrorReporter.ResetStats();
StaticAnalysisEngine.Create(context).Run();
var stats = AnalysisErrorReporter.GetStats();
var expected = "Static analysis detected '3' errors.";
Assert.AreEqual(expected.Replace(Environment.NewLine, string.Empty), stats);
IO.StopWritingToMemory();
}
public void TestAccessInVirtualMethod9Fail()
{
var test = @"
using Microsoft.PSharp;
namespace Foo {
class eUnit : Event
{
public Letter Letter;
public eUnit(Letter letter)
: base()
{
this.Letter = letter;
}
}
struct Letter
{
public string Text;
public Letter(string text)
{
this.Text = text;
}
}
internal class Envelope
{
internal Letter Letter;
internal virtual void Foo(Letter letter) { }
}
internal class SuperEnvelope : Envelope
{
internal override void Foo(Letter letter)
{
Letter = letter; // ERROR
base.Letter.Text = ""Bangalore""; // ERROR
}
}
class M : Machine
{
MachineId Target;
bool Check;
[Start]
[OnEntry(nameof(FirstOnEntryAction))]
class First : MachineState { }
void FirstOnEntryAction()
{
this.Target = this.CreateMachine(typeof(M));
var letter = new Letter(""London"");
Envelope envelope = this.Foo();
this.Send(this.Target, new eUnit(letter));
this.Bar(envelope, letter);
}
Envelope Foo()
{
Envelope someEnvelope = new SuperEnvelope();
Envelope anotherEnvelope;
anotherEnvelope = new Envelope();
anotherEnvelope = someEnvelope;
if (this.Check)
{
return new Envelope();
}
else
{
return anotherEnvelope;
}
}
void Bar(Envelope envelope, Letter letter)
{
this.FooBar(envelope, letter);
}
void FooBar(Envelope envelope, Letter letter)
{
envelope.Foo(letter);
}
}
}";
var configuration = base.GetConfiguration();
configuration.DoStateTransitionAnalysis = false;
IO.StartWritingToMemory();
var context = CompilationContext.Create(configuration).LoadSolution(test, "cs");
ParsingEngine.Create(context).Run();
RewritingEngine.Create(context).Run();
AnalysisErrorReporter.ResetStats();
StaticAnalysisEngine.Create(context).Run();
var stats = AnalysisErrorReporter.GetStats();
var expected = "Static analysis detected '3' errors.";
Assert.AreEqual(expected.Replace(Environment.NewLine, string.Empty), stats);
IO.StopWritingToMemory();
}
public void TestAccessInVirtualMethod7Fail()
{
var test = @"
using Microsoft.PSharp;
namespace Foo {
class eUnit : Event
{
public Letter Letter;
public eUnit(Letter letter)
: base()
{
this.Letter = letter;
}
}
struct Letter
{
public string Text;
public Letter(string text)
{
this.Text = text;
}
}
internal class Envelope
{
internal Letter Letter;
internal virtual void Foo(Letter letter) { }
internal virtual void Bar(Letter letter) { }
}
internal class SuperEnvelope : Envelope
{
internal override void Foo(Letter letter)
{
letter.Text = ""Bangalore"";
}
internal override void Bar(Letter letter)
{
base.Letter.Text = ""Bangalore"";
}
}
class M : Machine
{
MachineId Target;
bool Check;
[Start]
[OnEntry(nameof(FirstOnEntryAction))]
class First : MachineState { }
void FirstOnEntryAction()
{
var letter = new Letter(""London"");
this.Target = this.CreateMachine(typeof(M));
Envelope envelope = this.Foo();
this.Send(this.Target, new eUnit(letter));
envelope.Foo(letter); // ERROR
}
Envelope Foo()
{
Envelope envelope = new SuperEnvelope();
Envelope anotherEnvelope = new Envelope();
anotherEnvelope = envelope;
if (this.Check)
{
return new Envelope();
}
else
{
return anotherEnvelope;
}
}
}
}";
var configuration = base.GetConfiguration();
IO.StartWritingToMemory();
var context = CompilationContext.Create(configuration).LoadSolution(test, "cs");
ParsingEngine.Create(context).Run();
RewritingEngine.Create(context).Run();
AnalysisErrorReporter.ResetStats();
StaticAnalysisEngine.Create(context).Run();
var stats = AnalysisErrorReporter.GetStats();
var expected = "Static analysis detected '1' error.";
Assert.AreEqual(expected.Replace(Environment.NewLine, string.Empty), stats);
var error = "Error: Method 'FirstOnEntryAction' of machine 'Foo.M' accesses " +
"'letter' after giving up its ownership.";
var actual = IO.GetOutput();
Assert.AreEqual(error.Replace(Environment.NewLine, string.Empty),
actual.Substring(0, actual.IndexOf(Environment.NewLine)));
IO.StopWritingToMemory();
}
public void TestComplexAccessesInCall11Fail()
{
var test = @"
using Microsoft.PSharp;
namespace Foo {
class eUnit : Event
{
public Letter Letter;
public eUnit(Letter letter)
: base()
{
this.Letter = letter;
}
}
struct Letter
{
public string Text;
public Letter(string text)
{
this.Text = text;
}
}
class OtherClass
{
AnotherClass AC;
public void Foo(Letter letter)
{
var ac = new AnotherClass(letter);
this.AC = ac;
this.AC.Bar();
}
}
class AnotherClass
{
internal Letter Letter;
public AnotherClass(Letter letter)
{
this.Letter = letter;
}
public void Bar()
{
this.Letter.Text = ""Test""; // ERROR
}
}
class M : Machine
{
MachineId Target;
Letter Letter;
[Start]
[OnEntry(nameof(FirstOnEntryAction))]
class First : MachineState { }
void FirstOnEntryAction()
{
this.Target = this.CreateMachine(typeof(M));
Letter letter = new Letter(""London"");
var oc = new OtherClass();
this.Send(this.Target, new eUnit(letter));
oc.Foo(letter);
}
}
}";
var configuration = base.GetConfiguration();
configuration.DoStateTransitionAnalysis = false;
IO.StartWritingToMemory();
var context = CompilationContext.Create(configuration).LoadSolution(test, "cs");
ParsingEngine.Create(context).Run();
RewritingEngine.Create(context).Run();
AnalysisErrorReporter.ResetStats();
StaticAnalysisEngine.Create(context).Run();
var stats = AnalysisErrorReporter.GetStats();
var expected = "Static analysis detected '2' errors.";
Assert.AreEqual(expected.Replace(Environment.NewLine, string.Empty), stats);
IO.StopWritingToMemory();
}
public void TestWriteAccessAfterSendInLoop2()
{
var test = @"
using Microsoft.PSharp;
namespace Foo {
class eUnit : Event
{
public Letter Letter;
public eUnit(Letter letter)
: base()
{
this.Letter = letter;
}
}
struct Letter
{
public string Text;
public Letter(string text)
{
this.Text = text;
}
}
class M : Machine
{
MachineId Target;
[Start]
[OnEntry(nameof(FirstOnEntryAction))]
class First : MachineState { }
void FirstOnEntryAction()
{
var letter = new Letter(""London"");
this.Target = this.CreateMachine(typeof(M));
int k = 10;
for (int i = 0; i < k; i++)
{
continue;
letter.Text = ""Bangalore"";
this.Send(this.Target, new eUnit(letter));
}
}
}
}";
var configuration = base.GetConfiguration();
IO.StartWritingToMemory();
var context = CompilationContext.Create(configuration).LoadSolution(test, "cs");
ParsingEngine.Create(context).Run();
RewritingEngine.Create(context).Run();
AnalysisErrorReporter.ResetStats();
StaticAnalysisEngine.Create(context).Run();
var stats = AnalysisErrorReporter.GetStats();
var expected = "No static analysis errors detected.";
Assert.AreEqual(expected.Replace(Environment.NewLine, string.Empty), stats);
IO.StopWritingToMemory();
}
public void TestFieldSendAlias6Fail()
{
var test = @"
using Microsoft.PSharp;
namespace Foo {
class eUnit : Event
{
public Letter Letter;
public eUnit(Letter letter)
: base()
{
this.Letter = letter;
}
}
struct Letter
{
public string Text;
public int Num;
public Letter(string text, int num)
{
this.Text = text;
this.Num = num;
}
}
class M : Machine
{
MachineId Target;
Object Obj;
[Start]
[OnEntry(nameof(FirstOnEntryAction))]
class First : MachineState { }
void FirstOnEntryAction()
{
this.Target = this.CreateMachine(typeof(M));
this.Obj = (this.ReceivedEvent as eUnit).Letter;
this.Send(this.Target, new eUnit((this.ReceivedEvent as eUnit).Letter));
}
}
}";
var configuration = base.GetConfiguration();
configuration.DoStateTransitionAnalysis = false;
IO.StartWritingToMemory();
var context = CompilationContext.Create(configuration).LoadSolution(test, "cs");
ParsingEngine.Create(context).Run();
RewritingEngine.Create(context).Run();
AnalysisErrorReporter.ResetStats();
StaticAnalysisEngine.Create(context).Run();
var stats = AnalysisErrorReporter.GetStats();
var expected = "Static analysis detected '1' error.";
Assert.AreEqual(expected.Replace(Environment.NewLine, string.Empty), stats);
var error = "Error: Method 'FirstOnEntryAction' of machine 'Foo.M' sends " +
"'ReceivedEvent', which contains data from field 'Foo.M.Obj'.";
var actual = IO.GetOutput();
Assert.AreEqual(error.Replace(Environment.NewLine, string.Empty),
actual.Substring(0, actual.IndexOf(Environment.NewLine)));
IO.StopWritingToMemory();
}
public void TestWriteAccessAfterSendInLoop1Fail()
{
var test = @"
using Microsoft.PSharp;
namespace Foo {
class eUnit : Event
{
public Letter Letter;
public eUnit(Letter letter)
: base()
{
this.Letter = letter;
}
}
struct Letter
{
public string Text;
public Letter(string text)
{
this.Text = text;
}
}
class M : Machine
{
MachineId Target;
[Start]
[OnEntry(nameof(FirstOnEntryAction))]
class First : MachineState { }
void FirstOnEntryAction()
{
var letter = new Letter(""London"");
this.Target = this.CreateMachine(typeof(M));
int k = 10;
for (int i = 0; i < k; i++)
{
this.Send(this.Target, new eUnit(letter)); // ERROR
}
}
}
}";
var configuration = base.GetConfiguration();
IO.StartWritingToMemory();
var context = CompilationContext.Create(configuration).LoadSolution(test, "cs");
ParsingEngine.Create(context).Run();
RewritingEngine.Create(context).Run();
AnalysisErrorReporter.ResetStats();
StaticAnalysisEngine.Create(context).Run();
var stats = AnalysisErrorReporter.GetStats();
var expected = "Static analysis detected '1' error.";
Assert.AreEqual(expected.Replace(Environment.NewLine, string.Empty), stats);
var error = "Error: Method 'FirstOnEntryAction' of machine 'Foo.M' sends " +
"'letter', the ownership of which has already been given up.";
var actual = IO.GetOutput();
Assert.AreEqual(error.Replace(Environment.NewLine, string.Empty),
actual.Substring(0, actual.IndexOf(Environment.NewLine)));
IO.StopWritingToMemory();
}
public void TestReturnAliasAccess8Fail()
{
var test = @"
using Microsoft.PSharp;
namespace Foo {
class eUnit : Event
{
public Envelope Envelope;
public eUnit(Envelope envelope)
: base()
{
this.Envelope = envelope;
}
}
struct Envelope
{
public Letter Letter;
public Envelope(Letter letter)
{
this.Letter = letter;
}
}
struct Letter
{
public string Text;
public int Num;
public Letter(string text, int num)
{
this.Text = text;
this.Num = num;
}
}
class M : Machine
{
MachineId Target;
Letter Letter;
[Start]
[OnEntry(nameof(FirstOnEntryAction))]
class First : MachineState { }
void FirstOnEntryAction()
{
this.Target = this.CreateMachine(typeof(M));
this.Foo();
}
void Foo()
{
var letter = new Letter(""test"", 0);
var envelope = new Envelope(letter);
envelope.Letter = this.Bar();
this.Send(this.Target, new eUnit(envelope));
}
Letter Bar()
{
return this.Letter;
}
}
}";
var configuration = base.GetConfiguration();
configuration.DoStateTransitionAnalysis = false;
IO.StartWritingToMemory();
var context = CompilationContext.Create(configuration).LoadSolution(test, "cs");
ParsingEngine.Create(context).Run();
RewritingEngine.Create(context).Run();
AnalysisErrorReporter.ResetStats();
StaticAnalysisEngine.Create(context).Run();
var stats = AnalysisErrorReporter.GetStats();
var expected = "Static analysis detected '1' error.";
Assert.AreEqual(expected.Replace(Environment.NewLine, string.Empty), stats);
var error = "Error: Method 'Foo' of machine 'Foo.M' sends 'envelope', " +
"which contains data from field 'Foo.M.Letter'.";
var actual = IO.GetOutput();
Assert.AreEqual(error.Replace(Environment.NewLine, string.Empty),
actual.Substring(0, actual.IndexOf(Environment.NewLine)));
IO.StopWritingToMemory();
}
public void TestIfStatement8Fail()
{
var test = @"
using Microsoft.PSharp;
namespace Foo {
class eUnit : Event
{
public Letter Letter;
public eUnit(Letter letter)
: base()
{
this.Letter = letter;
}
}
class eReq : Event
{
public int Value;
public eReq(int value)
: base()
{
this.Value = value;
}
}
struct Letter
{
public string Text;
public Letter(string text)
{
this.Text = text;
}
}
class M : Machine
{
MachineId Target;
Letter Letter;
[Start]
[OnEntry(nameof(FirstOnEntryAction))]
class First : MachineState { }
void FirstOnEntryAction()
{
int num = (this.ReceivedEvent as eReq).Value;
this.Target = this.CreateMachine(typeof(M));
Letter letter = new Letter(""London"");
Letter otherLetter = new Letter(""Bangalore"");
this.Letter = letter;
if (num == 0)
{
otherLetter = new Letter(""Redmond"");
}
else
{
otherLetter = letter;
}
this.Send(this.Target, new eUnit(otherLetter));
this.Letter.Text = ""text"";
}
}
}";
var configuration = base.GetConfiguration();
IO.StartWritingToMemory();
var context = CompilationContext.Create(configuration).LoadSolution(test, "cs");
ParsingEngine.Create(context).Run();
RewritingEngine.Create(context).Run();
AnalysisErrorReporter.ResetStats();
StaticAnalysisEngine.Create(context).Run();
var stats = AnalysisErrorReporter.GetStats();
var expected = "Static analysis detected '2' errors.";
Assert.AreEqual(expected.Replace(Environment.NewLine, string.Empty), stats);
IO.StopWritingToMemory();
}
public void TestWriteAccessAfterSendInCallee5Fail()
{
var test = @"
using Microsoft.PSharp;
namespace Foo {
class eUnit : Event
{
public Letter Letter;
public eUnit(Letter letter)
: base()
{
this.Letter = letter;
}
}
struct Letter
{
public string Text;
public int Num;
public Letter(string text, int num)
{
this.Text = text;
this.Num = num;
}
public int Get() { return 0; }
}
class M : Machine
{
MachineId Target;
Letter Letter;
[Start]
[OnEntry(nameof(FirstOnEntryAction))]
class First : MachineState { }
void FirstOnEntryAction()
{
var letter = new Letter(""test"", 0);
this.Target = this.CreateMachine(typeof(M));
this.Send(this.Target, new eUnit(letter));
this.Foo(letter);
}
void Foo(Letter letter)
{
var k = letter.Get(); // ERROR
}
}
}";
var configuration = base.GetConfiguration();
IO.StartWritingToMemory();
var context = CompilationContext.Create(configuration).LoadSolution(test, "cs");
ParsingEngine.Create(context).Run();
RewritingEngine.Create(context).Run();
AnalysisErrorReporter.ResetStats();
StaticAnalysisEngine.Create(context).Run();
var stats = AnalysisErrorReporter.GetStats();
var expected = "Static analysis detected '1' error.";
Assert.AreEqual(expected.Replace(Environment.NewLine, string.Empty), stats);
var error = "Error: Method 'FirstOnEntryAction' of machine 'Foo.M' " +
"accesses 'letter' after giving up its ownership.";
var actual = IO.GetOutput();
Assert.AreEqual(error.Replace(Environment.NewLine, string.Empty),
actual.Substring(0, actual.IndexOf(Environment.NewLine)));
IO.StopWritingToMemory();
}
public void TestExternalLibraryCallFail()
{
var test = @"
using Microsoft.PSharp;
namespace Foo {
class eUnit : Event
{
public Letter Letter;
public eUnit(Letter letter)
: base()
{
this.Letter = letter;
}
}
struct Letter
{
public string Text;
public Letter(string text)
{
this.Text = text;
}
}
class M : Machine
{
MachineId Target;
[Start]
[OnEntry(nameof(FirstOnEntryAction))]
class First : MachineState { }
void FirstOnEntryAction()
{
this.Target = this.CreateMachine(typeof(M));
Letter letter = new Letter(""London"");
this.Send(this.Target, new eUnit(letter));
System.Console.WriteLine(letter.Text);
}
}
}";
var configuration = base.GetConfiguration();
IO.StartWritingToMemory();
ErrorReporter.ShowWarnings = true;
var context = CompilationContext.Create(configuration).LoadSolution(test, "cs");
ParsingEngine.Create(context).Run();
RewritingEngine.Create(context).Run();
AnalysisErrorReporter.ResetStats();
StaticAnalysisEngine.Create(context).Run();
var stats = AnalysisErrorReporter.GetStats();
var expected = "Static analysis detected '0' errors and '1' warning.";
Assert.AreEqual(expected.Replace(Environment.NewLine, string.Empty), stats);
var error = "Warning: Method 'FirstOnEntryAction' of machine 'Foo.M' calls a " +
"method with unavailable source code, which might be a source of errors.";
var actual = IO.GetOutput();
Assert.AreEqual(error.Replace(Environment.NewLine, string.Empty),
actual.Substring(0, actual.IndexOf(Environment.NewLine)));
ErrorReporter.ShowWarnings = false;
IO.StopWritingToMemory();
}