internal void GenCall(CodeGenContext context)
{
int result = context.CreateLocal("result", PrimitiveType.Object);
PERWAPI.CILLabel endLabel = context.NewLabel();
PERWAPI.CILLabel retryLabel = context.NewLabel();
context.CodeLabel(retryLabel);
context.StartBlock(Clause.Try);
{
// object result = Call(...)
GenCall0(context);
context.stloc(result);
context.Goto(endLabel);
}
PERWAPI.TryBlock tryBlock = context.EndTryBlock();
context.StartBlock(Clause.Catch);
{
CatchBreakException(context, result, endLabel);
}
context.EndCatchBlock(Runtime.BreakExceptionRef, tryBlock);
context.StartBlock(Clause.Catch);
{
CatchRetryException(context, retryLabel);
}
context.EndCatchBlock(Runtime.RetryExceptionRef, tryBlock);
context.CodeLabel(endLabel);
context.ldloc(result);
context.ReleaseLocal(result, true);
}
internal override void GenCode0(CodeGenContext context)
{
PERWAPI.CILLabel finalLabel = context.NewLabel();
int RescueTemp = context.CreateLocal("rescueTemp", PERWAPI.PrimitiveType.Object);
context.ldnull();
context.stloc(RescueTemp);
if (ensure != null)
{
context.StartBlock(Clause.Try); // outer try block with finally
context.StartBlock(Clause.Try); // inner try block with catch
}
GenInnerBlock(context, RescueTemp);
if (ensure != null)
{
context.Goto(finalLabel);
PERWAPI.TryBlock innerTry = context.EndTryBlock();
context.StartBlock(Clause.Catch);
GenRescue(context, null, 0, null);
context.EndCatchBlock(Runtime.SystemExceptionRef, innerTry);
PERWAPI.TryBlock outerTry = context.EndTryBlock();
// Fixme: reset labels to prevent branches out of finally block.
context.StartBlock(Clause.Finally);
ensure.GenCode(context);
if (context.Reachable())
context.pop();
context.endfinally();
context.EndFinallyBlock(outerTry);
context.CodeLabel(finalLabel);
context.newEndPoint(location);
}
context.ldloc(RescueTemp);
context.ReleaseLocal(RescueTemp, true);
}
internal void CatchReturnException(CodeGenContext context, PERWAPI.TryBlock tryBlock)
{
// catch (Ruby.ReturnException exception) { ... }
context.StartBlock(Clause.Catch);
{
PERWAPI.CILLabel falseLabel = context.NewLabel();
int exception = context.StoreInTemp("exception", Runtime.ReturnExceptionRef, location);
// if (exception.scope == thisframe)
context.ldloc(exception);
context.ldfld(Runtime.ReturnException.scope);
context.ldloc(0);
context.bne(falseLabel);
// returnTemp = exception.return_value;
context.ldloc(exception);
context.ldfld(Runtime.ReturnException.return_value);
context.stloc(returnTemp);
context.Goto(context.labels.Return);
// falseLabel:
context.CodeLabel(falseLabel);
// throw exception
context.rethrow();
context.ReleaseLocal(exception, true);
}
context.EndCatchBlock(Runtime.ReturnExceptionRef, tryBlock);
}
internal void AddScopeBody(CodeGenContext context)
{
returnTemp = context.CreateLocal("returnTemp", PrimitiveType.Object);
context.labels = new Labels();
context.labels.Redo = context.NewLabel();
context.labels.Return = context.NewLabel();
// try { ... }
context.StartBlock(Clause.Try);
{
if (BEGIN != null)
BEGIN.GenCode(context);
context.CodeLabel(context.labels.Redo);
if (body != null)
{
body.GenCode(context);
if (context.Reachable())
context.stloc(returnTemp);
}
context.Goto(context.labels.Return);
}
PERWAPI.TryBlock tryBlock = context.EndTryBlock();
CatchReturnException(context, tryBlock);
// ReturnLabel:
// return returnTemp;
context.CodeLabel(context.labels.Return);
context.newEndPoint(location);
if (context.Method.GetRetType() != PERWAPI.PrimitiveType.Void)
context.ldloc(returnTemp);
context.ret();
context.ReleaseLocal(returnTemp, true);
}
private void GenInnerBlock(CodeGenContext context, int RescueTemp)
{
PERWAPI.CILLabel elseLabel = context.NewLabel();
Labels catchLabels = new Labels();
catchLabels.Break = context.labels.Break;
catchLabels.Next = context.labels.Next;
catchLabels.Redo = context.labels.Redo;
catchLabels.Return = context.labels.Return;
catchLabels.Retry = context.NewLabel();
context.CodeLabel(catchLabels.Retry);
context.StartBlock(Clause.Try);
{
if (body != null)
body.GenCode(context);
else
context.ldnull();
if (context.Reachable())
{
context.stloc(RescueTemp);
context.Goto(elseLabel);
}
}
PERWAPI.TryBlock innerTry = context.EndTryBlock();
PERWAPI.CILLabel endLabel = context.NewLabel();
if (rescue != null)
{
context.StartBlock(Clause.Catch);
{
Labels original = context.labels;
context.labels = catchLabels;
GenRescue(context, endLabel, RescueTemp, rescue);
context.labels = original;
}
context.EndCatchBlock(Runtime.SystemExceptionRef, innerTry);
}
context.CodeLabel(elseLabel);
{
if (_else != null)
{
_else.GenCode(context);
if (context.Reachable())
context.stloc(RescueTemp);
}
}
context.CodeLabel(endLabel);
}
internal override void GenCode0(CodeGenContext context)
{
int RescueTemp = context.CreateLocal("rescueTemp", PERWAPI.PrimitiveType.Object);
int ExceptionTemp = context.CreateLocal("exceptionTemp", PERWAPI.PrimitiveType.Object);
PERWAPI.CILLabel endLabel = context.NewLabel();
context.StartBlock(Clause.Try);
{
expr.GenCode(context);
if (context.Reachable())
{
context.stloc(RescueTemp);
context.Goto(endLabel);
}
}
PERWAPI.TryBlock tryBlock = context.EndTryBlock();
context.StartBlock(Clause.Catch);
{
PERWAPI.CILLabel stdErrLabel = context.NewLabel();
context.stloc(ExceptionTemp);
context.ldloc(ExceptionTemp);
context.ldfld(Runtime.RubyException.parent);
context.isinst(Runtime.StandardErrorRef);
context.brtrue(stdErrLabel);
context.ldloc(ExceptionTemp);
context.throwOp();
context.CodeLabel(stdErrLabel);
rescue.GenCode(context);
if (context.Reachable())
{
context.stloc(RescueTemp);
context.Goto(endLabel);
}
}
context.EndCatchBlock(Runtime.RubyExceptionRef, tryBlock);
context.CodeLabel(endLabel);
context.ldloc(RescueTemp);
context.ReleaseLocal(RescueTemp, true);
context.ReleaseLocal(ExceptionTemp, true);
}
internal void GenCode(CodeGenContext context, PERWAPI.CILLabel endLabel, int RescueTemp, int exception)
{
for (RESCUE_CLAUSE clause = this; clause != null; clause = clause.next)
{
PERWAPI.CILLabel nextClause = context.NewLabel();
PERWAPI.CILLabel thisClause = context.NewLabel();
context.ldc_i4(0);
LOCAL exceptionCaught = context.StoreInLocal("caught", PERWAPI.PrimitiveType.Boolean, this.location);
for (Node type = clause.types; type != null; type = type.nd_next)
{
PERWAPI.CILLabel label1 = context.NewLabel();
// Precompute each separately to avoid computing a list of types
type.GenCode0(context);
LOCAL tt = context.StoreInLocal("type", PERWAPI.PrimitiveType.Object, type.location);
new METHOD_CALL(tt, ID.intern(Tokens.tEQQ), new AST.LOCAL(exception, type.location), type.location).GenCode(context);
context.ReleaseLocal(tt.local, true);
context.call(Runtime.Eval.Test);
context.brfalse(label1);
context.PushTrue();
context.stloc(exceptionCaught.local);
context.CodeLabel(label1);
}
context.ldloc(exceptionCaught.local);
context.brtrue(thisClause);
context.ReleaseLocal(exceptionCaught.local, true);
context.br(nextClause);
context.CodeLabel(thisClause);
if (clause.var != null)
{
clause.var.Assign(context, new AST.LOCAL(exception, clause.var.location));
context.pop();
}
if (clause.body != null)
clause.body.GenCode(context);
else
context.ldnull();
if (context.Reachable())
context.stloc(RescueTemp);
// reset $!
//Eval.ruby_errinfo.value = null;
context.ldsfld(Runtime.Eval.ruby_errinfo);
context.ldnull();
context.stfld(Runtime.global_variable.value);
context.Goto(endLabel);
context.CodeLabel(nextClause);
}
}
internal override void GenCode0(CodeGenContext context)
{
context.newLine(location);
if (return_val != null)
return_val.GenCode(context);
else
context.ldnull();
if (this.parent_scope is BLOCK)
{
//throw new Ruby.ReturnException(return_value, this.defining_scope);
context.ldarg(0); // current Ruby.MethodBody
context.ldfld(Runtime.Block.defining_scope);
context.newobj(Runtime.ReturnException.ctor);
context.throwOp();
}
else if (this.parent_scope is BEGIN)
{
//throw new Ruby.ReturnException(return_value, caller);
context.ldarg("caller");
context.newobj(Runtime.ReturnException.ctor);
context.throwOp();
}
else
{
// return
context.stloc(parent_scope.returnTemp);
context.Goto(context.labels.Return);
}
}
internal override void GenCode0(CodeGenContext context)
{
context.newLine(location);
if (context.labels != null && context.labels.Retry != null)
context.Goto(context.labels.Retry);
else
{
System.Diagnostics.Debug.Assert(this.parent_scope is BLOCK);
// throw new Ruby.RetryException(block.defining_scope);
context.ldarg(0); // current Ruby.MethodBody
context.ldfld(Runtime.Block.defining_scope);
context.newobj(Runtime.RetryException.ctor);
context.throwOp();
}
}
internal override void GenCode0(CodeGenContext context)
{
context.newLine(location);
if (context.labels != null && context.labels.Redo != null)
context.Goto(context.labels.Redo);
else
throw new System.Exception("unexpected REDO not in loop or block");
}
internal override void GenCode0(CodeGenContext context)
{
context.newLine(location);
if (return_val != null)
return_val.GenCode(context);
else
context.ldnull();
context.stloc(parent_scope.returnTemp);
if (context.labels != null && context.labels.Next != null)
context.Goto(context.labels.Next);
else
context.Goto(context.labels.Return);
}
internal override void GenCode0(CodeGenContext context)
{
context.newLine(location);
if (return_val != null)
return_val.GenCode(context);
else
context.ldnull();
if (context.labels != null && context.labels.Break != null)
{
context.stloc(parent_scope.returnTemp);
context.Goto(context.labels.Break);
}
else
{
System.Diagnostics.Debug.Assert(this.parent_scope is BLOCK);
//throw new Ruby.BreakException(return_value, this.defining_scope);
context.ldarg(0); // current Ruby.MethodBody
context.ldfld(Runtime.Block.defining_scope);
context.newobj(Runtime.BreakException.ctor);
context.throwOp();
}
}
private void CatchBreakException(CodeGenContext context, int result, PERWAPI.CILLabel endLabel)
{
// catch (Exception exception)
int exception = context.StoreInTemp("exception", Runtime.BreakExceptionRef, location);
PERWAPI.CILLabel reThrowLabel = context.NewLabel();
// if (exception.scope != current_frame) goto reThrowLabel;
context.ldloc(0);
context.ldloc(exception);
context.ldfld(Runtime.BreakException.scope);
context.bne( reThrowLabel);
// result = exception.return_value;
context.ldloc(exception);
context.ldfld(Runtime.BreakException.return_value);
context.stloc(result);
// goto endLabel;
context.Goto(endLabel);
// reThrowLabel:
context.CodeLabel(reThrowLabel);
// throw exception;
context.ldloc(exception);
context.throwOp();
context.ReleaseLocal(exception, true);
}
private void CatchRetryException(CodeGenContext context, PERWAPI.CILLabel retryLabel)
{
// catch (Exception exception)
int exception = context.StoreInTemp("exception", Runtime.RetryExceptionRef, location);
PERWAPI.CILLabel reThrowLabel = context.NewLabel();
// if (exception.scope != current_frame) goto reThrowLabel;
context.ldloc(0);
context.ldloc(exception);
context.ldfld(Runtime.RetryException.scope);
context.bne( reThrowLabel);
// goto retryLabel
context.Goto(retryLabel);
// reThrowLabel:
context.CodeLabel(reThrowLabel);
// throw exception;
context.ldloc(exception);
context.throwOp();
context.ReleaseLocal(exception, true);
}
