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Diffstat (limited to 'src/msil/ch/epfl/lamp/compiler/msil/emit/ILGenerator.scala')
| -rw-r--r-- | src/msil/ch/epfl/lamp/compiler/msil/emit/ILGenerator.scala | 539 |
1 files changed, 0 insertions, 539 deletions
diff --git a/src/msil/ch/epfl/lamp/compiler/msil/emit/ILGenerator.scala b/src/msil/ch/epfl/lamp/compiler/msil/emit/ILGenerator.scala deleted file mode 100644 index 63ecbfd353..0000000000 --- a/src/msil/ch/epfl/lamp/compiler/msil/emit/ILGenerator.scala +++ /dev/null @@ -1,539 +0,0 @@ -/* - * System.Reflection.Emit-like API for writing .NET assemblies to MSIL - */ - - -package ch.epfl.lamp.compiler.msil.emit - -import ch.epfl.lamp.compiler.msil._ -import ch.epfl.lamp.compiler.msil.util.Table -import java.util.Stack -import java.io.IOException -import ILGenerator._ - -/** - * Generates Microsoft intermediate language (MSIL) instructions. - * - * @author Nikolay Mihaylov - * @version 1.0 - */ - final class ILGenerator(_owner: MethodBase) extends Visitable { - - //########################################################################## - // public interface - - /** - * Puts the specified instruction onto the stream of instructions. - */ - def Emit(opcode: OpCode) { - // switch opcode - if (opcode == OpCode.Ret) { - emit(opcode, null, 0) - } else { - emit(opcode, null) - } - } - - /** - * Puts the specified instruction and character argument onto - * the Microsoft intermediate language (MSIL) stream of instructions. - */ - def Emit(opcode: OpCode, arg: Char) { - emit(opcode,new Character(arg)) - } - - /** - * Puts the specified instruction and metadata token for the - * specified constructor onto the Microsoft intermediate language - * (MSIL) stream of instructions. - */ - def Emit(opcode: OpCode, arg: ConstructorInfo) { - assert(arg != null) - // newobj - // pop size is the number of parameters - emit(opcode,arg, OpCode.PUSH_size(opcode.CEE_push) - - arg.GetParameters().length) - } - - /** - * Puts the specified instruction onto the Microsoft intermediate language (MSIL) - * stream followed by the index of the given local variable. - */ - def Emit(opcode: OpCode, arg: LocalBuilder) { - assert(arg != null) - // ldarg | ldarg.s | ldarga - // ldarga.s | ldloc | ldloc.s | ldloca - // ldloca.s | starg | starg.s | stloc - // stloc.s - - // <instr_var> <localname> - emit(opcode, arg) - } - - - /** - * Puts the specified instruction and numerical argument onto - * the Microsoft intermediate language (MSIL) stream of instructions. - */ - def Emit(opcode: OpCode, arg: Double) { - // ldc.r4 | ldc.r8 - emit(opcode, new java.lang.Double(arg)) - } - - /** - * Puts the specified instruction and metadata token for the - * specified field onto the Microsoft intermediate language (MSIL) - * stream of instructions. - */ - def Emit(opcode: OpCode,arg: FieldInfo) { - assert(arg != null) - // ldfld | ldflda | ldsfld | ldsflda | stfld | stsfld - emit(opcode,arg) - } - - /** - * Puts the specified instruction and numerical argument onto - * the Microsoft intermediate language (MSIL) stream of instructions. - */ - def Emit(opcode: OpCode, arg: Short ) { - emit(opcode, new java.lang.Short(arg)) - } - - /** - * Puts the specified instruction and numerical argument onto - * the Microsoft intermediate language (MSIL) stream of instructions. - */ - def Emit(opcode: OpCode, arg: Int) { - // ldc.i4 | ldc.i4.s | unaligned - emit(opcode, new java.lang.Integer(arg)) - } - - /** - * Puts the specified instruction and numerical argument onto - * the Microsoft intermediate language (MSIL) stream of instructions. - */ - def Emit(opcode: OpCode, arg: Long) { - // ldc.i8 - emit(opcode, new java.lang.Long(arg)) - } - - /** - * Puts the specified instruction onto the Microsoft intermediate - * language (MSIL) stream and leaves space to include a label when - * fixes are done. - */ - def Emit(opcode: OpCode,label: Label) { - assert(label != null) - // beq | beq.s | bge | bge.s | - // bge.un | bge.un.s | bgt | bgt.s | bgt.un | bgt.un.s | - // ble | ble.s | ble.un | ble.un.s | blt | blt.s | - // blt.un | blt.un.s | bne.un | bne.un.s | br | br.s | - // brfalse | brfalse.s | brtrue | brtrue.s | leave | leave.s - - emit(opcode, label) - // is the label initialized ? if true backward jump else forward jump - if (label.isInitialized()) { -// if (arg.stacksize != lastLabel.stacksize) { -// System.err.println("ILGenerator.Emit: Stack depth differs depending on path:"); -// System.err.println("\tmethod = " + owner); -// System.err.println("\tPC = 0x" + Table.short2hex(lastLabel.address)); -// } - //assert arg.stacksize == lastLabel.stacksize; - } - else { - label.setStacksize(lastLabel.getStacksize()) - } - } - - /** - * Puts the specified instruction onto the Microsoft intermediate - * language (MSIL) stream and leaves space to include a label when - * fixes are done. - */ - def Emit(opcode: OpCode, arg: Array[Label] ) { - assert(arg != null) - // switch - - // <instr> ::= <instr_switch> ( <labels> ) - // Examples: - // switch (0x3, -14, Label1) - // switch (5, Label2) - emit(opcode, arg, arg.length) - } - - /** - * Puts the specified instruction onto the Microsoft intermediate - * language (MSIL) stream followed by the metadata token for the - * given method. - */ - def Emit(opcode: OpCode,arg: MethodInfo) { - assert(arg != null) - // call | callvirt | jmp | ldftn | ldvirtftn - // pop size is the number of parameters - // pop 1 more if method is not static ! - // push size is either 0 (void Method) either 1 - assert(arg.ReturnType != null, "No ReturnType: " + arg.DeclaringType + "::" + arg.Name) - - val popush: Int = if (opcode == OpCode.Ldftn || - opcode == OpCode.Ldvirtftn || - opcode == OpCode.Jmp) - { - OpCode.PUSH_size(opcode.CEE_push) - OpCode.POP_size(opcode.CEE_pop) - } else if (opcode == OpCode.Calli || opcode == OpCode.Callvirt) { - (if(arg.ReturnType == VOID) 0 else 1) - arg.GetParameters().length - 1 - } else { - (if(arg.ReturnType == VOID) 0 else 1) - arg.GetParameters().length - } - emit(opcode, arg, popush) - } - - /** - * Puts the specified instruction and numerical argument onto - * the Microsoft intermediate language (MSIL) stream of instructions. - */ - def Emit(opcode: OpCode, arg: Float ) { - emit(opcode, new java.lang.Float(arg)) - } - - /** - * Puts the specified instruction onto the Microsoft intermediate - * language (MSIL) stream followed by the metadata token for the - * given string. - */ - def Emit(opcode: OpCode, arg: String ) { - assert(arg != null) - // ldstr - emit(opcode, arg) - } - - /** - * Puts the specified instruction onto the Microsoft intermediate - * language (MSIL) stream followed by the metadata token for the - * given type. - */ - def Emit(opcode: OpCode, arg: Type) { - assert(arg != null) - // box | castclass | cpobj | initobj | isinst | - // ldelema | ldobj | mkrefany | newarr | refanyval | - // sizeof | stobj | unbox - - emit(opcode, arg) - } - - /** - * Puts a call or callvirt instruction onto the Microsoft intermediate - * language (MSIL) stream. - */ - def EmitCall(opcode: OpCode, arg: MethodInfo, - optionalParameterTypes: Array[Type]) { - assert(arg != null) - // pop size is the number of parameters - // push size is either 0 (void Method) either 1 - //System.out.println(arg.ReturnType.Size + " " + arg.GetParameters().length); - emit(opcode, arg, (if(arg.ReturnType == VOID) 0 else 1) - - arg.GetParameters().length) - } - - /** - * Emits the Microsoft intermediate language (MSIL) necessary to - * call WriteLine with the given field. - */ - def EmitWriteLine(arg: FieldInfo) { - // first load field info - // if static use OpCode.Ldsfld - if (arg.IsStatic()) - Emit(OpCodes.Ldsfld, arg) - else - Emit(OpCodes.Ldfld, arg) - // then call System.Console.WriteLine(arg.Type) - val t: Type = Type.GetType("System.Console") - val argsType: Array[Type] = new Array[Type](1) - argsType(0) = arg.FieldType - val m: MethodInfo = t.GetMethod("WriteLine", argsType) - EmitCall(OpCode.Call, m, null) - } - - /** - * Emits the Microsoft intermediate language (MSIL) necessary - * to call WriteLine with the given local variable. - */ - def EmitWriteLine(arg: LocalBuilder) { - // first load local variable - Emit(OpCodes.Ldloc, arg) - // then call System.Console.WriteLine(arg.Type) - val t: Type = Type.GetType("System.Console") - val argsType: Array[Type] = new Array[Type](1) - argsType(0) = arg.LocalType - val m: MethodInfo = t.GetMethod("WriteLine", argsType) - EmitCall(OpCode.Call, m, null) - } - - /** - * Emits the Microsoft intermediate language (MSIL) to call - * WriteLine with a string. - */ - def EmitWriteLine(arg: String) { - // first load string - Emit(OpCode.Ldstr, arg) - // then call System.Console.WriteLine(string) - val t: Type = Type.GetType("System.Console") - val argsType: Array[Type] = new Array[Type](1) - argsType(0) = Type.GetType("System.String") - val m: MethodInfo = t.GetMethod("WriteLine", argsType) - EmitCall(OpCode.Call, m, null) - } - - /** - * Declares a local variable. - */ - def DeclareLocal(localType: Type): LocalBuilder = { - val l: LocalBuilder = new LocalBuilder(locals, localType) - locals = locals + 1 - localList += l - return l - } - - /** - * Returns a new label that can be used as a token for branching. - * In order to set the position of the label within the stream, you - * must call MarkLabel. This is just a token and does not yet represent - * any particular location within the stream. - */ - def DefineLabel():Label = { - new Label.NormalLabel() - } - - /** - * Marks the Microsoft intermediate language (MSIL) stream's - * current position with the given label. - */ - def MarkLabel(label: Label) { - label.mergeWith(lastLabel) - /* - label.address = lastLabel.address; - //label.stacksize = lastLabel.stacksize; - if (label.stacksize >= 0) - lastLabel.stacksize = label.stacksize; - */ - } - - /** Begins a lexical scope. */ - def BeginScope() { - emitSpecialLabel(Label.NewScope) - } - - /** Ends a lexical scope. */ - def EndScope() { - emitSpecialLabel(Label.EndScope) - } - - /** - * Begins an exception block for a non-filtered exception. - * The label for the end of the block. This will leave you in the correct - * place to execute finally blocks or to finish the try. - */ - def BeginExceptionBlock() { - emitSpecialLabel(Label.Try) - val endExc: Label = new Label.NormalLabel() // new Label(lastLabel) ??? - excStack.push(Label.Try, endExc) - } - - /** Begins a catch block. */ - def BeginCatchBlock(exceptionType: Type) { - val kind = excStack.peekKind() - if (kind == Label.Kind.Try || - kind == Label.Kind.Catch) { - /* ok */ - } else { - throw new RuntimeException("Catch should follow either a try or catch") - } - val endExc: Label = excStack.popLabel() - Emit(OpCodes.Leave, endExc) - // the CLI automatically provide the exception object on the evaluation stack - // we adjust the stacksize - lastLabel.incStacksize() - excStack.push(Label.Catch, endExc) - emitSpecialLabel(Label.Catch, exceptionType) - } - - /** Ends an exception block. */ - def EndExceptionBlock() { - val kind = excStack.peekKind() - if (kind == Label.Kind.Try) { - throw new RuntimeException("Try block with neither catch nor finally") - } else if (kind == Label.Kind.Catch) { - Emit(OpCodes.Leave, excStack.peekLabel()) - } else if (kind == Label.Kind.Finally) { - Emit(OpCodes.Endfinally) - } - MarkLabel(excStack.popLabel()) - emitSpecialLabel(Label.EndTry) - } - - /** - * Begins a finally block in the Microsoft intermediate language - * (MSIL) instruction stream. - */ - def BeginFinallyBlock() { - val endExc: Label = excStack.popLabel() - Emit(OpCodes.Leave, endExc) - excStack.push(Label.Finally, endExc) - emitSpecialLabel(Label.Finally) - } - - /** - * Emits an instruction to throw an exception. - */ - def ThrowException(exceptionType: Type) { - assert(exceptionType != null) - if (!exceptionType.isSubtypeOf(Type.GetType("System.Exception"))) - throw new RuntimeException - (exceptionType + " doesn't extend System.Exception" ) - val ctor: ConstructorInfo = exceptionType.GetConstructor(Type.EmptyTypes) - if (ctor == null) - throw new RuntimeException("Type " + exceptionType - + "doesn't have a default constructor") - Emit(OpCodes.Newobj, ctor) - Emit(OpCodes.Throw) - } - - /** - * sets the line of the source file corresponding to the next instruction - */ - def setPosition(line: Int) { - if (line != 0) lineNums.put(lastLabel, Integer.toString(line)) - } - - def setPosition(line: Int, filename: String) { - if (line != 0) lineNums.put(lastLabel, line + " '" + filename + "'") - } - - def setPosition(startLine: Int, endLine: Int, startCol: Int, endCol: Int, filename: String) { - val lineRange = startLine + "," + endLine - val colRange = startCol + "," + endCol - lineNums.put(lastLabel, lineRange + ":" + colRange + " '" + filename + "'") - } - - def getLocals(): Array[LocalBuilder] = localList.toArray - - def getLabelIterator() = labelList.iterator - - def getOpcodeIterator() = opcodeList.iterator - - def getArgumentIterator() = argumentList.iterator - - //########################################################################## - // private implementation details - - - - // the local variable list - private final val localList = scala.collection.mutable.ArrayBuffer.empty[LocalBuilder] - - // the label list, the opcode list and the opcode argument list - // labelList is an array of Label - // opcodeList is an array of OpCode - // argumentList is an array of Object (null if no argument) - private final val labelList = scala.collection.mutable.ArrayBuffer.empty[Label] - private final val opcodeList = scala.collection.mutable.ArrayBuffer.empty[OpCode] - private final val argumentList = scala.collection.mutable.ArrayBuffer.empty[Object] - - // the program counter (pc) - // also called the stream's current position - private var pc: Int = 0 - - // last label - private var lastLabel: Label = new Label.NormalLabel(pc,0) - - // the maximum size of stack - private var maxstack: Int = 0 - - // the number of the locals - private var locals: Int = 0 - - // stack of label for exception mechanism - private val excStack: ExceptionStack = new ExceptionStack() - - // the method info owner of this ILGenerator - var owner: MethodBase = _owner - - val lineNums = scala.collection.mutable.Map.empty[Label, String] - - - def getMaxStacksize(): Int = { this.maxstack } - - // private emit with Object Argument - private def emit(opcode: OpCode, arg: Object) { - emit(opcode, arg, opcode.CEE_popush) - } - - // private emit with Object Argument and override POPUSH - private def emit(opcode: OpCode, arg: Object, overridePOPUSH: Int) { - // add label, opcode and argument - labelList += lastLabel - opcodeList += opcode - argumentList += arg - // compute new lastLabel (next label) - val stackSize: Int = lastLabel.getStacksize() + overridePOPUSH - if (stackSize < 0) { - val msg = "ILGenerator.emit(): Stack underflow in method: " + owner - scala.Console.println(msg) - // throw new RuntimeException(msg) - } - if (stackSize > maxstack) - maxstack = stackSize - var address: Int = lastLabel.getAddress() + opcode.CEE_length - if (opcode.CEE_opcode == OpCode.CEE_SWITCH) { - address = address + 4*arg.asInstanceOf[Array[Label]].length - } - lastLabel = new Label.NormalLabel(address, stackSize) - pc = pc + 1 - } - - def Ldarg0WasJustEmitted() : Boolean = { - if(opcodeList.isEmpty) - return false - val lastEmitted = opcodeList(opcodeList.size - 1) - lastEmitted eq OpCode.Ldarg_0 - } - - private def emitSpecialLabel(l: Label) { - emitSpecialLabel(l, null) - } - private def emitSpecialLabel(l: Label, catchType: Type) { - labelList += l - opcodeList += null - argumentList += catchType - } - - //########################################################################## - // - @throws(classOf[IOException]) - def apply(v: Visitor) { - v.caseILGenerator(this) - } - - //########################################################################## -} // class ILGenerator - - -object ILGenerator { - - val VOID: Type = Type.GetType("System.Void") - val NO_LABEL: String = "" - - private final class ExceptionStack { - private val labels = new scala.collection.mutable.Stack[Label]() - private val kinds = new scala.collection.mutable.Stack[Label]() - def ExceptionStack() {} - def pop() { labels.pop; kinds.pop } - def push(kind: Label, label: Label) { - kinds.push(kind); labels.push(label) - } - def peekKind(): Label.Kind = kinds.top.getKind - def peekLabel(): Label = labels.top - def popLabel(): Label = { kinds.pop(); labels.pop() } - } - -} - |