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refactor: redesigned runtime errors with added functionality

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This commit is contained in:
Jonny
2025-02-27 21:20:17 +00:00
parent 9e6970de62
commit 6f5fcd4d85
3 changed files with 115 additions and 86 deletions
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62
src/main/wacc/backend/asmGenerator.scala
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@@ -3,7 +3,7 @@ package wacc
import scala.collection.mutable.ListBuffer
import cats.data.Chain
import cats.syntax.foldable._
import wacc.RuntimeErrors._
import wacc.RuntimeError._
object asmGenerator {
import microWacc._
@@ -63,10 +63,7 @@ object asmGenerator {
LabelDef(s".L.str$i"),
Directive.Asciz(str.escaped)
)
} ++ zeroDivError.stringDef
++ badChrError.stringDef
++ nullPtrError.stringDef // TODO COLLATE TO ONE LIST INSTANCE
++ overflowError.stringDef
} ++ RuntimeError.all.foldMap(_.stringDef)
Chain(
Directive.IntelSyntax,
@@ -153,7 +150,7 @@ object asmGenerator {
stackAlign,
Move(RDI, RAX),
Compare(RDI, ImmediateVal(0)),
Jump(LabelArg(nullPtrError.errLabel), Cond.Equal),
Jump(LabelArg(NullPtrError.errLabel), Cond.Equal),
assemblyIR.Call(CLibFunc.Free)
)
)
@@ -170,44 +167,7 @@ object asmGenerator {
)
)
chain ++= Chain(
// TODO can this be done with a call to generateStmt?
// Consider other error cases -> look to generalise
LabelDef(zeroDivError.errLabel),
stackAlign,
Load(RDI, IndexAddress(RIP, LabelArg(zeroDivError.strLabel))),
assemblyIR.Call(CLibFunc.PrintF),
Move(RDI, ImmediateVal(-1)),
assemblyIR.Call(CLibFunc.Exit)
)
chain ++= Chain(
LabelDef(badChrError.errLabel),
Pop(RSI),
stackAlign,
Load(RDI, IndexAddress(RIP, LabelArg(badChrError.strLabel))),
assemblyIR.Call(CLibFunc.PrintF),
Move(RDI, ImmediateVal(255)),
assemblyIR.Call(CLibFunc.Exit)
)
chain ++= Chain(
LabelDef(nullPtrError.errLabel),
stackAlign,
Load(RDI, IndexAddress(RIP, LabelArg(nullPtrError.strLabel))),
assemblyIR.Call(CLibFunc.PrintF),
Move(RDI, ImmediateVal(255)),
assemblyIR.Call(CLibFunc.Exit)
)
chain ++= Chain(
LabelDef(overflowError.errLabel),
stackAlign,
Load(RDI, IndexAddress(RIP, LabelArg(overflowError.strLabel))),
assemblyIR.Call(CLibFunc.PrintF),
Move(RDI, ImmediateVal(255)),
assemblyIR.Call(CLibFunc.Exit)
)
chain ++= RuntimeError.all.foldMap(_.generateHandler)
chain
}
@@ -348,7 +308,7 @@ object asmGenerator {
chain += Move(EAX, stack.head)
chain += And(EAX, ImmediateVal(-128))
chain += Compare(EAX, ImmediateVal(0))
chain += Jump(LabelArg(badChrError.errLabel), Cond.NotEqual)
chain += Jump(LabelArg(BadChrError.errLabel), Cond.NotEqual)
case UnaryOperator.Ord => // No op needed
case UnaryOperator.Len =>
chain += stack.pop(RAX)
@@ -357,7 +317,7 @@ object asmGenerator {
case UnaryOperator.Negate =>
chain += Xor(EAX, EAX)
chain += Subtract(EAX, stack.head)
chain += Jump(LabelArg(overflowError.errLabel), Cond.Overflow)
chain += Jump(LabelArg(OverflowError.errLabel), Cond.Overflow)
chain += stack.drop()
chain += stack.push(Q64, RAX)
case UnaryOperator.Not =>
@@ -373,20 +333,20 @@ object asmGenerator {
op match {
case BinaryOperator.Add =>
chain += Add(stack.head, destX)
chain += Jump(LabelArg(overflowError.errLabel), Cond.Overflow)
chain += Jump(LabelArg(OverflowError.errLabel), Cond.Overflow)
case BinaryOperator.Sub =>
chain += Subtract(destX, stack.head)
chain += stack.drop()
chain += stack.push(destX.size, RAX)
case BinaryOperator.Mul =>
chain += Multiply(destX, stack.head)
chain += Jump(LabelArg(overflowError.errLabel), Cond.Overflow)
chain += Jump(LabelArg(OverflowError.errLabel), Cond.Overflow)
chain += stack.drop()
chain += stack.push(destX.size, RAX)
case BinaryOperator.Div =>
chain += Compare(stack.head, ImmediateVal(0))
chain += Jump(LabelArg(zeroDivError.errLabel), Cond.Equal)
chain += Jump(LabelArg(ZeroDivError.errLabel), Cond.Equal)
chain += CDQ()
chain += Divide(stack.head)
chain += stack.drop()
@@ -394,7 +354,7 @@ object asmGenerator {
case BinaryOperator.Mod =>
chain += Compare(stack.head, ImmediateVal(0))
chain += Jump(LabelArg(zeroDivError.errLabel), Cond.Equal)
chain += Jump(LabelArg(ZeroDivError.errLabel), Cond.Equal)
chain += CDQ()
chain += Divide(stack.head)
chain += stack.drop()
@@ -480,7 +440,7 @@ object asmGenerator {
chain
}
private def stackAlign: AsmLine = And(Register(Q64, SP), ImmediateVal(-16))
def stackAlign: AsmLine = And(Register(Q64, SP), ImmediateVal(-16))
private def zeroRest(dest: Dest, size: Size): Chain[AsmLine] = size match {
case Q64 | D32 => Chain.empty
case _ => Chain.one(And(dest, ImmediateVal((1 << (size.toInt * 8)) - 1)))