141 lines
4.0 KiB
Scala
141 lines
4.0 KiB
Scala
package wacc
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import cats.data.Chain
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import wacc.assemblyIR._
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val ERROR_CODE = 255
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sealed trait RuntimeError {
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def strLabel: String
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def errStr: String
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def errLabel: String
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def stringDef: Chain[AsmLine] = Chain(
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Directive.Int(errStr.length),
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LabelDef(strLabel),
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Directive.Asciz(errStr)
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)
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def generateHandler: Chain[AsmLine]
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}
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object RuntimeError {
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// TODO: Refactor to mitigate imports and redeclared vals perhaps
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import wacc.asmGenerator.stackAlign
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import assemblyIR.Size._
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import assemblyIR.RegName._
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// private val RAX = Register(Q64, AX)
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// private val EAX = Register(D32, AX)
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private val RDI = Register(Q64, DI)
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private val RIP = Register(Q64, IP)
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// private val RBP = Register(Q64, BP)
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private val RSI = Register(Q64, SI)
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// private val RDX = Register(Q64, DX)
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private val RCX = Register(Q64, CX)
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case object ZeroDivError extends RuntimeError {
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val strLabel = ".L._errDivZero_str0"
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val errStr = "fatal error: division or modulo by zero"
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val errLabel = ".L._errDivZero"
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def generateHandler: Chain[AsmLine] = Chain(
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LabelDef(ZeroDivError.errLabel),
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stackAlign,
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Load(RDI, IndexAddress(RIP, LabelArg(ZeroDivError.strLabel))),
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assemblyIR.Call(CLibFunc.PrintF),
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Move(RDI, ImmediateVal(-1)),
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assemblyIR.Call(CLibFunc.Exit)
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)
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}
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case object BadChrError extends RuntimeError {
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val strLabel = ".L._errBadChr_str0"
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val errStr = "fatal error: int %d is not an ASCII character 0-127"
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val errLabel = ".L._errBadChr"
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def generateHandler: Chain[AsmLine] = Chain(
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LabelDef(BadChrError.errLabel),
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Pop(RSI),
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stackAlign,
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Load(RDI, IndexAddress(RIP, LabelArg(BadChrError.strLabel))),
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assemblyIR.Call(CLibFunc.PrintF),
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Move(RDI, ImmediateVal(ERROR_CODE)),
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assemblyIR.Call(CLibFunc.Exit)
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)
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}
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case object NullPtrError extends RuntimeError {
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val strLabel = ".L._errNullPtr_str0"
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val errStr = "fatal error: null pair dereferenced or freed"
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val errLabel = ".L._errNullPtr"
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def generateHandler: Chain[AsmLine] = Chain(
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LabelDef(NullPtrError.errLabel),
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stackAlign,
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Load(RDI, IndexAddress(RIP, LabelArg(NullPtrError.strLabel))),
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assemblyIR.Call(CLibFunc.PrintF),
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Move(RDI, ImmediateVal(ERROR_CODE)),
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assemblyIR.Call(CLibFunc.Exit)
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)
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}
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case object OverflowError extends RuntimeError {
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val strLabel = ".L._errOverflow_str0"
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val errStr = "fatal error: integer overflow or underflow occurred"
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val errLabel = ".L._errOverflow"
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def generateHandler: Chain[AsmLine] = Chain(
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LabelDef(OverflowError.errLabel),
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stackAlign,
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Load(RDI, IndexAddress(RIP, LabelArg(OverflowError.strLabel))),
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assemblyIR.Call(CLibFunc.PrintF),
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Move(RDI, ImmediateVal(ERROR_CODE)),
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assemblyIR.Call(CLibFunc.Exit)
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)
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}
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case object OutOfBoundsError extends RuntimeError {
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val strLabel = ".L._errOutOfBounds_str0"
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val errStr = "fatal error: array index %d out of bounds"
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val errLabel = ".L._errOutOfBounds"
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def generateHandler: Chain[AsmLine] = Chain(
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LabelDef(OutOfBoundsError.errLabel),
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Move(RSI, RCX),
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stackAlign,
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Load(RDI, IndexAddress(RIP, LabelArg(OutOfBoundsError.strLabel))),
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assemblyIR.Call(CLibFunc.PrintF),
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Move(RDI, ImmediateVal(ERROR_CODE)),
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assemblyIR.Call(CLibFunc.Exit)
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)
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}
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case object OutOfMemoryError extends RuntimeError {
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val strLabel = ".L._errOutOfMemory_str0"
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val errStr = "fatal error: out of memory"
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val errLabel = ".L._errOutOfMemory"
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def generateHandler: Chain[AsmLine] = Chain(
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LabelDef(OutOfMemoryError.errLabel),
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stackAlign,
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Load(RDI, IndexAddress(RIP, LabelArg(OutOfMemoryError.strLabel))),
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assemblyIR.Call(CLibFunc.PrintF),
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Move(RDI, ImmediateVal(ERROR_CODE)),
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assemblyIR.Call(CLibFunc.Exit)
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)
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}
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val all: Chain[RuntimeError] =
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Chain(ZeroDivError, BadChrError, NullPtrError, OverflowError, OutOfBoundsError,
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OutOfMemoryError)
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}
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