C#测试代码：
using System; class Program
{
static void A()
{
try
{
Console.WriteLine("Throwing an exception");
throw new Exception("Did you catch it?");
}
finally
{
Console.WriteLine("A.finally()");
}
} static void B()
{
try
{
C();
Console.WriteLine("Failure! Exception has not been thrown.");
}
catch (Exception ex)
{
Console.WriteLine("Test B: success! Caught exception!\n" + ex.ToString());
}
finally
{
Console.WriteLine("B.finally()");
}
} static void C()
{
A();
} static void D()
{
try
{
try
{
Console.WriteLine("Throwing an exception");
throw new Exception("Did you catch it in the right handler?");
}
catch (IndexOutOfRangeException e)
{
Console.WriteLine("Test D: Failed. Called wrong handler.\n" + e.ToString());
}
}
catch (Exception ex)
{
Console.WriteLine("Test D: success! Caught exception!\n" + ex.ToString());
}
} static void Main()
{
Console.WriteLine("Testing A");
try
{
A();
Console.WriteLine("Failure! Exception has not been thrown.");
}
catch (Exception ex)
{
Console.WriteLine("Test A: success! Caught exception!\n" + ex.ToString());
}
finally
{
Console.WriteLine("Main.finally().");
} Console.WriteLine("\nTesting B"); B(); Console.WriteLine("\nTesting D"); D(); Console.WriteLine("\nTesting class TestE"); TestE.Run(); Console.WriteLine("Exiting test");
} class TestE
{
static void A()
{
try
{
Console.WriteLine("In A");
B();
}
catch (ArgumentException ae)
{
Console.WriteLine("Error! Caught ArgumentException.\n" + ae.ToString());
}
} static void B()
{
try
{
Console.WriteLine("In B");
C();
}
finally
{
Console.WriteLine("Leaving B");
}
} static void C()
{
Console.WriteLine("In C");
D();
Console.WriteLine("Error! A() should not be reached in C()");
A();
} static void D()
{
Console.WriteLine("In D, throwing...");
throw new Exception("Exception test");
} public static void Run()
{
try
{
A();
}
catch (Exception ex)
{
Console.WriteLine("Test C: success! Caught exception!\n" + ex.ToString());
}
}
}
}
Throw Exception
代码编译：
mcs -nostdlib -r:compile_r_lib/mscorlib.dll -r:compile_r_lib/System.Runtime.dll -r:compile_r_lib/System.Console.dll app/ThrowException.cs
代码运行：
runtime_mac/corerun app/ThrowException.exe
在没有实现managed exception handling时的运行结果：
Testing A
Throwing an exception
{0x7fff7c0e1300-0x108e7c840} ASSERT [DEBUG ] at
/git/dotnet/coreclr/src/pal/src/arch/i386/context.cpp.38:
Trace/BPT trap: 5
在初步实现managed exception handling后的运行结果：
Testing A
Throwing an exception
A.finally()
Test A: success! Caught exception!
System.Exception: Did you catch it?
at Program.A()
at Program.Main()
Main.finally(). Testing B
Throwing an exception
A.finally()
Test B: success! Caught exception!
System.Exception: Did you catch it?
at Program.A()
at Program.B()
B.finally() Testing D
Throwing an exception
Test D: success! Caught exception!
System.Exception: Did you catch it in the right handler?
at Program.D()
Trace/BPT trap: 5
对应的git提交：Implement basic support for managed exception handling
对应的github pull request：Implement basic support for managed exception handling