public static int Main()
{
// allocate a bunch of SOH byte arrays and touch them.
var r = new Random(1234);
for (int i = 0; i < 10000; i++)
{
int size = r.Next(10000);
var arr = AllocUninitialized <byte> .Call(size);
if (size > 1)
{
arr[0] = 5;
arr[size - 1] = 17;
if (arr[0] != 5 || arr[size - 1] != 17)
{
Console.WriteLine("Scenario 1 for GC.AllocUninitialized() failed!");
return(1);
}
}
}
// allocate a bunch of LOH int arrays and touch them.
for (int i = 0; i < 1000; i++)
{
int size = r.Next(100000, 1000000);
var arr = AllocUninitialized <int> .Call(size);
arr[0] = 5;
arr[size - 1] = 17;
if (arr[0] != 5 || arr[size - 1] != 17)
{
Console.WriteLine("Scenario 2 for GC.AllocUninitialized() failed!");
return(1);
}
}
// allocate a string array
{
int i = 100;
var arr = AllocUninitialized <string> .Call(i);
arr[0] = "5";
arr[i - 1] = "17";
if (arr[0] != "5" || arr[i - 1] != "17")
{
Console.WriteLine("Scenario 3 for GC.AllocUninitialized() failed!");
return(1);
}
}
// allocate max size byte array
{
if (IntPtr.Size == 8)
{
int i = 0x7FFFFFC7;
var arr = AllocUninitialized <byte> .Call(i);
arr[0] = 5;
arr[i - 1] = 17;
if (arr[0] != 5 || arr[i - 1] != 17)
{
Console.WriteLine("Scenario 4 for GC.AllocUninitialized() failed!");
return(1);
}
}
}
// negative size
{
try
{
var arr = AllocUninitialized <byte> .Call(-1);
Console.WriteLine("Scenario 5 Expected exception!");
return(1);
}
catch (ArgumentOutOfRangeException)
{
}
}
// too large
{
try
{
var arr = AllocUninitialized <double> .Call(int.MaxValue);
Console.WriteLine("Scenario 6 Expected exception!");
return(1);
}
catch (OutOfMemoryException)
{
}
}
Console.WriteLine("Test for GC.Collect() passed!");
return(100);
}
public static int Main()
{
// allocate a bunch of SOH byte arrays and touch them.
var r = new Random(1234);
for (int i = 0; i < 10000; i++)
{
int size = r.Next(10000);
var arr = AllocUninitialized <byte> .Call(size);
if (size > 1)
{
arr[0] = 5;
arr[size - 1] = 17;
if (arr[0] != 5 || arr[size - 1] != 17)
{
Console.WriteLine("Scenario 1 for GC.AllocUninitialized() failed!");
return(1);
}
}
}
// allocate a bunch of LOH int arrays and touch them.
for (int i = 0; i < 1000; i++)
{
int size = r.Next(100000, 1000000);
var arr = AllocUninitialized <int> .Call(size);
arr[0] = 5;
arr[size - 1] = 17;
if (arr[0] != 5 || arr[size - 1] != 17)
{
Console.WriteLine("Scenario 2 for GC.AllocUninitialized() failed!");
return(1);
}
}
// allocate a string array
{
int i = 100;
var arr = AllocUninitialized <string> .Call(i);
arr[0] = "5";
arr[i - 1] = "17";
if (arr[0] != "5" || arr[i - 1] != "17")
{
Console.WriteLine("Scenario 3 for GC.AllocUninitialized() failed!");
return(1);
}
}
// allocate max size byte array
{
if (IntPtr.Size == 8)
{
int i = 0x7FFFFFC7;
var arr = AllocUninitialized <byte> .Call(i);
arr[0] = 5;
arr[i - 1] = 17;
if (arr[0] != 5 || arr[i - 1] != 17)
{
Console.WriteLine("Scenario 4 for GC.AllocUninitialized() failed!");
return(1);
}
}
}
// negative size
{
int GetNegativeValue() => - 1;
int negativeSize = GetNegativeValue();
Type expectedExceptionType = null;
try
{
GC.KeepAlive(new byte[negativeSize]);
Console.WriteLine("Scenario 5 Expected exception (new operator)!");
return(1);
}
catch (Exception newOperatorEx)
{
expectedExceptionType = newOperatorEx.GetType();
}
try
{
var arr = AllocUninitialized <byte> .Call(-1);
Console.WriteLine("Scenario 5 Expected exception (GC.AllocateUninitializedArray)!");
return(1);
}
catch (Exception allocUninitializedEx) when(allocUninitializedEx.GetType() == expectedExceptionType)
{
// OK
}
catch (Exception other)
{
Console.WriteLine($"Scenario 5 Expected exception type mismatch: expected {expectedExceptionType}, but got {other.GetType()}!");
return(1);
}
}
// too large
{
try
{
var arr = AllocUninitialized <double> .Call(int.MaxValue);
Console.WriteLine("Scenario 6 Expected exception!");
return(1);
}
catch (OutOfMemoryException)
{
}
}
Console.WriteLine("Test for GC.Collect() passed!");
return(100);
}