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|
/* NSC -- new scala compiler
* Copyright 2005 LAMP/EPFL
* @author Martin Odersky
*/
// $Id$
package scala.tools.nsc;
import java.io._;
import java.nio.charset._;
import scala.tools.util.{SourceReader,ClassPath,AbstractFile};
import scala.tools.nsc.util.{Position,SourceFile};
import scala.tools.nsc.reporters._;
import scala.collection.mutable.{HashSet,HashMap,ListBuffer}
import symtab._;
import symtab.classfile.{PickleBuffer, Pickler};
import util.Statistics;
import ast._;
import ast.parser._;
import typechecker._;
import matching.TransMatcher;
import transform._;
import backend.icode.{ICodes, GenICode, Checkers};
import backend.ScalaPrimitives;
import backend.jvm.GenJVM;
class Global(val settings: Settings, val reporter: Reporter) extends SymbolTable
with Trees
with CompilationUnits
{
// sub-components --------------------------------------------------
object treePrinters extends TreePrinters {
val global: Global.this.type = Global.this
}
val treePrinter = treePrinters.create();
object treeBrowsers extends TreeBrowsers {
val global: Global.this.type = Global.this
}
val treeBrowser = treeBrowsers.create();
object treeInfo extends TreeInfo {
val global: Global.this.type = Global.this
}
object gen extends TreeGen {
val global: Global.this.type = Global.this
}
object constfold extends ConstantFolder {
val global: Global.this.type = Global.this
}
object checker extends TreeCheckers {
val global: Global.this.type = Global.this
}
object icodes extends ICodes {
val global: Global.this.type = Global.this
}
object checkers extends Checkers {
val global: Global.this.type = Global.this
}
object statistics extends Statistics {
val global: Global.this.type = Global.this
}
object overridingPairs extends OverridingPairs {
val global: Global.this.type = Global.this
}
val copy = new LazyTreeCopier();
// reporting -------------------------------------------------------
def error(msg: String) = reporter.error(null, msg);
def warning(msg: String) = reporter.warning(null, msg);
def inform(msg: String) = System.err.println(msg);
//reporter.info(null, msg, true);
def informProgress(msg: String) =
if (settings.verbose.value) inform("[" + msg + "]");
def informTime(msg: String, start: long) =
informProgress(msg + " in " + (System.currentTimeMillis() - start) + "ms");
def log(msg: Object): unit =
if (settings.log contains phase.name) inform("[log " + phase + "] " + msg);
def abort(msg: String) = throw new Error(msg);
// file interface -------------------------------------------------------
private val reader: SourceReader = {
def stdCharset: Charset = {
settings.encoding.value = "ISO-8859-1"; // A mandatory charset
Charset.forName(settings.encoding.value);
}
val charset =
try {
Charset.forName(settings.encoding.value);
} catch {
case _: IllegalCharsetNameException =>
error("illegal charset name '" + settings.encoding.value + "'");
stdCharset
case _: UnsupportedCharsetException =>
error("unsupported charset '" + settings.encoding.value + "'");
stdCharset
}
new SourceReader(charset.newDecoder());
}
val classPath = new ClassPath(
settings.classpath.value,
settings.sourcepath.value,
settings.bootclasspath.value,
settings.extdirs.value);
if (settings.verbose.value) {
System.err.println("classpath = " + classPath);
}
def getSourceFile(f: AbstractFile): SourceFile =
new SourceFile(f, reader.read(f));
def getSourceFile(name: String): SourceFile = {
val f = AbstractFile.getFile(name);
if (f == null) throw new FileNotFoundException(
"source file '" + name + "' could not be found");
getSourceFile(f)
}
def getSourceFile(clazz: Symbol): SourceFile = {
val f = classPath.getRoot().lookupPath(
clazz.fullNameString(File.separatorChar) + ".scala", false);
if (f == null) throw new FileNotFoundException(
"source file for " + clazz + " could not be found");
getSourceFile(f)
}
object loaders extends SymbolLoaders {
val global: Global.this.type = Global.this
}
def rootLoader: LazyType = new loaders.PackageLoader(classPath.getRoot());
// Phases ------------------------------------------------------------
var globalPhase: Phase = NoPhase;
val MaxPhases = 64;
val phaseWithId = new Array[Phase](MaxPhases);
{ for (val i <- List.range(0, MaxPhases)) phaseWithId(i) = NoPhase }
abstract class GlobalPhase(prev: Phase) extends Phase(prev) {
phaseWithId(id) = this;
def run: unit = currentRun.units foreach applyPhase;
def apply(unit: CompilationUnit): unit;
private val isErased = prev.name == "erasure" || prev.erasedTypes;
override def erasedTypes: boolean = isErased;
private val isFlat = prev.name == "flatten" || prev.flatClasses;
override def flatClasses: boolean = isFlat;
final def applyPhase(unit: CompilationUnit): unit = {
if (settings.debug.value) inform("[running phase " + name + " on " + unit + "]");
val unit0 = currentRun.currentUnit;
currentRun.currentUnit = unit;
apply(unit);
currentRun.advanceUnit;
assert(currentRun.currentUnit == unit);
currentRun.currentUnit = unit0;
}
}
object syntaxAnalyzer extends SyntaxAnalyzer {
val global: Global.this.type = Global.this
}
object analyzer extends Analyzer {
val global: Global.this.type = Global.this;
}
object superAccessors extends SuperAccessors {
val global: Global.this.type = Global.this
}
object pickler extends Pickler {
val global: Global.this.type = Global.this
}
object refchecks extends RefChecks {
val global: Global.this.type = Global.this;
}
object uncurry extends UnCurry {
val global: Global.this.type = Global.this;
}
object tailCalls extends TailCalls {
val global: Global.this.type = Global.this;
}
object transMatcher extends TransMatcher {
val global: Global.this.type = Global.this;
}
object explicitOuter extends ExplicitOuter {
val global: Global.this.type = Global.this;
}
object erasure extends Erasure {
val global: Global.this.type = Global.this;
}
object lambdaLift extends LambdaLift {
val global: Global.this.type = Global.this;
}
object constructors extends Constructors {
val global: Global.this.type = Global.this;
}
object flatten extends Flatten {
val global: Global.this.type = Global.this;
}
object mixin extends Mixin {
val global: Global.this.type = Global.this;
}
object sampleTransform extends SampleTransform {
val global: Global.this.type = Global.this;
}
object genicode extends GenICode {
val global: Global.this.type = Global.this;
}
object icodePrinter extends backend.icode.Printers {
val global: Global.this.type = Global.this;
}
object scalaPrimitives extends ScalaPrimitives {
val global: Global.this.type = Global.this;
}
object genJVM extends GenJVM {
val global: Global.this.type = Global.this;
}
object icodeChecker extends checkers.ICodeChecker();
object typer extends analyzer.Typer(
analyzer.NoContext.make(EmptyTree, Global.this.definitions.RootClass, new Scope()));
def phaseDescriptors: List[SubComponent] = List(
analyzer.namerFactory,
analyzer.typerFactory,
superAccessors,
pickler,
refchecks,
uncurry,
tailCalls,
transMatcher,
explicitOuter,
erasure,
lambdaLift,
constructors,
flatten,
mixin,
genicode,
genJVM,
sampleTransform);
private var curRun: Run = NoRun;
override def currentRun: Run = curRun;
class TyperRun extends Run {
override val terminalPhase : Phase = typerPhase.next.next;
//override val terminalPhase : Phase = superAccessors.next;
}
class Run extends CompilerRun {
var currentUnit : CompilationUnit = _;
curRun = this;
override val firstPhase = syntaxAnalyzer.newPhase(NoPhase);
phase = firstPhase;
definitions.init; // needs firstPhase and phase to be defined != NoPhase,
// that's why it is placed here.
icodes.init;
private var p: Phase = firstPhase;
private var stopped = false;
for (val pd <- phaseDescriptors) {
if (!stopped) {
if (!(settings.skip contains pd.phaseName)) p = pd.newPhase(p);
stopped = settings.stop contains pd.phaseName;
}
}
// progress tracking
def progress(current : Int, total : Int) : Unit = {}
private var phasec : Int = 0;
private var unitc : Int = 0;
def advancePhase : Unit = {
unitc = 0;
phasec = phasec + 1;
refreshProgress;
}
def advanceUnit : Unit = {
unitc = unitc + 1;
refreshProgress;
}
private def refreshProgress = if (fileset.size > 0)
progress((phasec * fileset.size) + unitc,
(phaseDescriptors.length+1) * fileset.size);
override val terminalPhase : Phase = new GlobalPhase(p) {
def name = "terminal";
def apply(unit: CompilationUnit): unit = {}
}
override def phaseNamed(name: String): Phase = {
var p: Phase = firstPhase;
while (p.next != p && p.name != name) p = p.next;
if (p.name != name) NoPhase else p
}
override val namerPhase = phaseNamed("namer");
override val typerPhase = phaseNamed("typer");
override val refchecksPhase = phaseNamed("refchecks");
override val explicitOuterPhase = phaseNamed("explicitouter");
override val erasurePhase = phaseNamed("erasure");
override val flattenPhase = phaseNamed("flatten");
override val mixinPhase = phaseNamed("mixin");
private var unitbuf = new ListBuffer[CompilationUnit];
private var fileset = new HashSet[AbstractFile];
private def addUnit(unit: CompilationUnit): unit = {
unitbuf += unit;
fileset += unit.source.getFile();
}
def units: Iterator[CompilationUnit] = unitbuf.elements;
/** A map from compiled top-level symbols to their source files */
val symSource = new HashMap[Symbol, AbstractFile];
/** A map from compiled top-level symbols to their picklers */
val symData = new HashMap[Symbol, PickleBuffer];
def compileSources(sources: List[SourceFile]): unit = {
val startTime = System.currentTimeMillis();
reporter.reset;
for (val source <- sources)
addUnit(new CompilationUnit(source));
globalPhase = firstPhase;
while (globalPhase != terminalPhase && reporter.errors == 0) {
val startTime = System.currentTimeMillis();
phase = globalPhase;
globalPhase.run;
if (settings.print contains globalPhase.name) treePrinter.printAll();
if (settings.browse contains globalPhase.name) treeBrowser.browse(units);
informTime(globalPhase.description, startTime);
globalPhase = globalPhase.next;
if (settings.check contains globalPhase.name) {
phase = globalPhase;
if (globalPhase.name == "jvm") icodeChecker.checkICodes;
else checker.checkTrees;
}
if (settings.statistics.value) statistics.print(phase);
advancePhase;
}
if (settings.Xshowcls.value != "") showDef(newTermName(settings.Xshowcls.value), false);
if (settings.Xshowobj.value != "") showDef(newTermName(settings.Xshowobj.value), true);
if (settings.Xshowicode.value) writeICode();
if (reporter.errors == 0) {
assert(symData.isEmpty, symData.elements.toList);
/*
for (val Pair(sym, pickled) <- symData.elements.toList) {
sym setPos Position.NOPOS;
// if (symData contains sym) {
// symData -= sym;
// symData -= sym.linkedSym;
// writeSymblFile(sym, pickled)
// }
// }
*/
for (val Pair(sym, file) <- symSource.elements) {
sym setPos Position.NOPOS;
if (sym.isTerm) sym.moduleClass setPos Position.NOPOS;
resetPackageClass(sym.owner);
}
} else {
for (val Pair(sym, file) <- symSource.elements) {
sym.reset(new loaders.SourcefileLoader(file));
if (sym.isTerm) sym.moduleClass.reset(loaders.moduleClassLoader);
}
}
informTime("total", startTime);
}
def compileLate(file: AbstractFile): unit =
if (fileset == null)
throw new FatalError("No class file for " + file + " was found\n(This file cannot be loaded as a source file)");
else if (!(fileset contains file)) {
val unit = new CompilationUnit(getSourceFile(file));
addUnit(unit);
var localPhase = firstPhase.asInstanceOf[GlobalPhase];
while ((localPhase.id < globalPhase.id || localPhase.id <= namerPhase.id) &&
reporter.errors == 0) {
atPhase(localPhase)(localPhase.applyPhase(unit));
localPhase = localPhase.next.asInstanceOf[GlobalPhase];
}
refreshProgress;
}
def compileFiles(files: List[AbstractFile]): unit =
try {
compileSources(files map getSourceFile)
} catch {
case ex: IOException => error(ex.getMessage());
}
def compile(filenames: List[String]): unit =
try {
compileSources(filenames map getSourceFile)
} catch {
case ex: IOException => error(ex.getMessage());
}
private def resetPackageClass(pclazz: Symbol): unit = {
assert(pclazz.isPackageClass, pclazz);
atPhase(firstPhase) {
pclazz.setInfo(atPhase(typerPhase)(pclazz.info))
}
if (!pclazz.isRoot) resetPackageClass(pclazz.owner);
}
}
def showDef(name: Name, module: boolean): unit = {
def getSym(name: Name, module: boolean): Symbol = {
var i = name.length - 1;
while (i != 0 && name(i) != '#' && name(i) != '.') i = i - 1;
if (i == 0)
definitions.getModule(name)
else {
val root = getSym(name.subName(0, i), name(i) == '.');
var selector = name.subName(i+1, name.length);
if (module) selector = selector.toTypeName;
root.info.member(selector)
}
}
val sym = getSym(name, module);
System.err.println("" + sym.name + ":" +
(if (module) sym.tpe.symbol.info else sym.info))
}
/** Returns the file with the given suffix for the given class. */
def getFile(clazz: Symbol, suffix: String) = {
val outdirname = settings.outdir.value;
var outdir = new File(if (outdirname == "") "." else outdirname);
val filename = clazz.fullNameString('.');
var start = 0;
var end = filename.indexOf('.', start);
while (end >= start) {
outdir = new File(outdir, filename.substring(start, end));
if (!outdir.exists()) outdir.mkdir();
start = end + 1;
end = filename.indexOf('.', start);
}
new File(outdir, filename.substring(start) + suffix)
}
private def writeSymblFile(clazz: Symbol, pickled: PickleBuffer) = {
val file = getFile(clazz, ".symbl");
try {
val stream = new FileOutputStream(file);
stream.write(pickled.bytes, 0, pickled.writeIndex);
stream.close();
informProgress("wrote " + file);
} catch {
case ex: IOException =>
if (settings.debug.value) ex.printStackTrace();
error("could not write file " + file);
}
}
private def writeICode(): Unit = {
val printer = new icodePrinter.TextPrinter(null);
icodes.classes.foreach((cls) => {
val file = getFile(cls.symbol, ".icode");
try {
val stream = new FileOutputStream(file);
printer.setWriter(new PrintWriter(stream, true));
printer.printClass(cls);
informProgress("wrote " + file);
} catch {
case ex: IOException =>
if (settings.debug.value) ex.printStackTrace();
error("could not write file " + file);
}
});
}
}
|