private JitAction<int> GenerateCode()
{
//Action<bool> sample =
// throwException =>
// {
// try
// {
// Console.WriteLine(0);
// if (throwException)
// throw new Exception("1");
// }
// catch (Exception e)
// {
// Console.WriteLine(e.Message);
// }
// finally
// {
// Console.WriteLine(2);
// }
// };
JitFunction<IntPtr> getInstructionPointer = new JitFunction<IntPtr>(hints: FunctionHints.Naked);
{
Assembler assembler = getInstructionPointer.GetAssembler();
assembler.Mov(Register.nax, Register.nbp);
assembler.Ret();
getInstructionPointer.Compile();
}
JitAction<int> testMethod = new JitAction<int>();
unsafe
{
_threadData = (ThreadData*)Marshal.AllocHGlobal(Marshal.SizeOf(typeof(ThreadData)));
Marshal.StructureToPtr(new ThreadData(), (IntPtr)_threadData, false);
Compiler c = testMethod.GetCompiler();
c.Logger = new FileLogger(Console.Error);
// arguments
GPVar argThrowException = c.ArgGP(0);
// special variables
GPVar currentException = c.NewGP();
GPVar nextException = c.NewGP();
GPVar position = c.NewGP();
// special prolog
GPVar varMethodData = c.NewGP();
GPVar varThreadData = c.NewGP();
c.Mov(varThreadData, (IntPtr)_threadData);
// labels
Label leaveTry = c.DefineLabel();
Label enterCatch = c.DefineLabel();
Label leaveCatch = c.DefineLabel();
Label enterFinally = c.DefineLabel();
Label leaveFinally = c.DefineLabel();
Label enterThrowHandler = c.DefineLabel();
Label enterRethrowHandler = c.DefineLabel();
Label enterLeaveHandler = c.DefineLabel();
Label enterEndFinallyHandler = c.DefineLabel();
Label retLabel = c.DefineLabel();
// try
c.Comment("Enter try");
GenerateWriteLine(c, (Imm)0);
c.Test(argThrowException, argThrowException);
c.Jz(leaveTry, Hint.Taken);
GenerateNewException(c, nextException, (Imm)1);
c.Call(getInstructionPointer, position);
c.Jmp(enterThrowHandler);
c.MarkLabel(leaveTry);
c.Jmp(enterLeaveHandler);
// catch
c.Comment("Enter catch");
c.MarkLabel(enterCatch);
GPVar varErrorCode = c.NewGP();
GenerateLoadCurrentException(c, varErrorCode, varThreadData);
GenerateLoadExceptionMessage(c, varErrorCode, varErrorCode);
GenerateWriteLine(c, varErrorCode);
c.Xor(varErrorCode, varErrorCode);
c.Mov(Mem.sysint_ptr(varThreadData, ThreadData_ExceptionDataOffset), varErrorCode);
c.MarkLabel(leaveCatch);
c.Jmp(enterLeaveHandler);
// finally
c.Comment("Enter finally");
c.MarkLabel(enterFinally);
GenerateWriteLine(c, (Imm)2);
c.MarkLabel(leaveFinally);
c.Jmp(enterEndFinallyHandler);
//// special epilog (throw and leave implementations)
//c.Jmp(retLabel);
c.Comment("Handler for 'throw' instructions");
c.MarkLabel(enterThrowHandler);
c.Mov(Mem.sysint_ptr(varThreadData, ThreadData_ExceptionDataOffset), nextException);
c.Jmp(enterCatch);
c.Comment("Handler for 'rethrow' instructions");
c.MarkLabel(enterRethrowHandler);
// rethrow is not implemented and not currently used
c.Int3();
c.Comment("Handler for 'leave' instructions");
c.MarkLabel(enterLeaveHandler);
c.Jmp(enterFinally);
//c.Mov(Mem.sysint_ptr(varThreadData, ThreadData_ExceptionDataOffset), 0);
//throw new NotImplementedException("TODO: check for a finally block");
//c.Jmp(leaveTarget);
c.Comment("Handler for 'endfinally' instructions");
c.MarkLabel(enterEndFinallyHandler);
GenerateLoadCurrentException(c, currentException, varThreadData);
c.Test(currentException, currentException);
c.Jnz(enterRethrowHandler, Hint.NotTaken);
c.Jmp(retLabel);
// return
c.Comment("Return");
c.MarkLabel(retLabel);
c.Ret();
testMethod.Compile();
}
return testMethod;
}
private static IntPtr CreateMethod(IntPtr stubAddress)
{
JitFunction<int> jitFunction = new JitFunction<int>();
Compiler compiler = jitFunction.GetCompiler();
GPVar x = compiler.NewGP(VariableType.INT32);
compiler.Mov(x, 2);
compiler.Ret(x);
jitFunction.Compile();
return jitFunction.CompiledAddress;
}
public void TestJitFunctionCall1()
{
JitFunction<int, int> caller = new JitFunction<int, int>();
JitFunction<int, int> called = new JitFunction<int, int>(CallingConvention.MsFastCall);
{
Compiler compiler = called.GetCompiler();
compiler.Logger = new FileLogger(Console.Error);
GPVar arg = compiler.ArgGP(0);
GPVar var = compiler.NewGP();
compiler.Mov(var, arg);
compiler.Imul(var, 2);
compiler.Ret(var);
called.Compile();
}
{
Compiler compiler = caller.GetCompiler();
compiler.Logger = new FileLogger(Console.Error);
GPVar arg = compiler.ArgGP(0);
GPVar var = compiler.NewGP();
compiler.Call(called, arg, var);
compiler.Ret(var);
}
var f = caller.GetDelegate<TestJitFunction2Fn>();
int result = f(1);
Assert.AreEqual(2, result);
called.Dispose();
caller.Dispose();
}