Trying to fix corrupted state stack when calling Class.newInstance.

See https://github.com/konsoletyper/teavm/issues/118

teavm-classlib/src/main/java/org/teavm/classlib/impl/tz/DateTimeZoneBuilder.java

@@ -65,8 +65,7 @@ import org.teavm.classlib.impl.CharFlow;
  * @since 1.0
  */
 public class DateTimeZoneBuilder {
-    private static TimeZone GMT = TimeZone.getTimeZone("GMT+00:00");
+    private static TimeZone gmtCache;
-
     private static StorableDateTimeZone buildFixedZone(String id, int wallOffset, int standardOffset) {
         return new FixedDateTimeZone(id, wallOffset, standardOffset);
     }
@@ -78,6 +77,13 @@ public class DateTimeZoneBuilder {
         iRuleSets = new ArrayList<>(10);
     }
 
+    private static TimeZone getGMT() {
+        if (gmtCache == null) {
+            gmtCache = TimeZone.getTimeZone("GMT+00:00");
+        }
+        return gmtCache;
+    }
+
     /**
      * Adds a cutover for added rules. The standard offset at the cutover
      * defaults to 0. Call setStandardOffset afterwards to change it.
@@ -346,7 +352,7 @@ public class DateTimeZoneBuilder {
                 offset = 0;
             }
 
-            Calendar calendar = Calendar.getInstance(GMT);
+            Calendar calendar = Calendar.getInstance(getGMT());
             calendar.setTimeInMillis(0);
             calendar.set(Calendar.YEAR, year);
             calendar.set(Calendar.MONTH, iMonthOfYear - 1);
@@ -381,7 +387,7 @@ public class DateTimeZoneBuilder {
             // Convert from UTC to local time.
             instant += offset;
 
-            GregorianCalendar calendar = new GregorianCalendar(GMT);
+            GregorianCalendar calendar = new GregorianCalendar(getGMT());
             calendar.setTimeInMillis(instant);
             calendar.set(Calendar.MONTH, iMonthOfYear - 1);
             calendar.set(Calendar.DATE, 1);
@@ -427,7 +433,7 @@ public class DateTimeZoneBuilder {
             // Convert from UTC to local time.
             instant += offset;
 
-            GregorianCalendar calendar = new GregorianCalendar(GMT);
+            GregorianCalendar calendar = new GregorianCalendar(getGMT());
             calendar.setTimeInMillis(instant);
             calendar.set(Calendar.MONTH, iMonthOfYear - 1);
             calendar.set(Calendar.DATE, 1);
@@ -589,7 +595,7 @@ public class DateTimeZoneBuilder {
         }
 
         public long next(final long instant, int standardOffset, int saveMillis) {
-            Calendar calendar = Calendar.getInstance(GMT);
+            Calendar calendar = Calendar.getInstance(getGMT());
             final int wallOffset = standardOffset + saveMillis;
             long testInstant = instant;
 
@@ -844,7 +850,7 @@ public class DateTimeZoneBuilder {
             }
 
             // Stop precalculating if year reaches some arbitrary limit.
-            Calendar c = Calendar.getInstance(GMT);
+            Calendar c = Calendar.getInstance(getGMT());
             c.setTimeInMillis(nextMillis);
             if (c.get(Calendar.YEAR) >= YEAR_LIMIT) {
                 return null;

teavm-classlib/src/main/java/org/teavm/classlib/java/util/TTimer.java

@@ -18,8 +18,9 @@ package org.teavm.classlib.java.util;
 import org.teavm.classlib.java.lang.TIllegalStateException;
 import org.teavm.classlib.java.lang.TObject;
 import org.teavm.classlib.java.lang.TString;
-import org.teavm.platform.Platform;
+import org.teavm.dom.browser.TimerHandler;
-import org.teavm.platform.PlatformRunnable;
+import org.teavm.dom.browser.Window;
+import org.teavm.jso.JS;
 
 /**
  *
@@ -45,19 +46,50 @@ public class TTimer extends TObject {
         }
     }
 
-    public void schedule(TTimerTask task, long delay) {
+    public void schedule(final TTimerTask task, long delay) {
         if (cancelled || task.timer != null || task.nativeTimerId >= 0) {
             throw new TIllegalStateException();
         }
         task.timer = this;
-        task.nativeTimerId = scheduleOnce(task, (int)delay);
+        task.nativeTimerId = ((Window)JS.getGlobal()).setTimeout(new TimerHandler() {
+            @Override
+            public void onTimer() {
+                new Thread() {
+                    @Override
+                    public void run() {
+                        if (cancelled || task.timer == null) {
+                            return;
                         }
-
-    private static int scheduleOnce(final TTimerTask task, int delay) {
-        return Platform.schedule(new PlatformRunnable() {
-            @Override public void run() {
                         TTimerTask.performOnce(task);
                     }
-        }, delay);
+                }.start();
+            }
+        }, (int)delay);
+    }
+
+    public void schedule(final TTimerTask task, long delay, final long period) {
+        if (cancelled || task.timer != null || task.nativeTimerId >= 0) {
+            throw new TIllegalStateException();
+        }
+        task.timer = this;
+        task.nativeTimerId = ((Window)JS.getGlobal()).setTimeout(new TimerHandler() {
+            @Override
+            public void onTimer() {
+                final TimerHandler self = this;
+                new Thread() {
+                    @Override
+                    public void run() {
+                        if (cancelled || task.timer == null) {
+                            return;
+                        }
+                        task.nativeTimerId = ((Window)JS.getGlobal()).setTimeout(self, (int)period);
+                        TTimerTask.performOnce(task);
+                        if (!cancelled) {
+                            task.timer = TTimer.this;
+                        }
+                    }
+                }.start();
+            }
+        }, (int)delay);
     }
 }

teavm-platform/src/main/java/org/teavm/platform/plugin/PlatformGenerator.java

@@ -112,11 +112,14 @@ public class PlatformGenerator implements Generator, Injector, DependencyPlugin
     }
 
     private void generateNewInstance(GeneratorContext context, SourceWriter writer) throws IOException {
+        String cls = context.getParameterName(1);
+
         writer.append("if").ws().append("($rt_resuming())").ws().append("{").indent().softNewLine();
-        writer.append("return $rt_nativeThread().pop();").softNewLine();
+        writer.append("var $r = $rt_nativeThread().pop();").softNewLine();
+        writer.append(cls + ".$$constructor$$($r);").softNewLine();
+        writer.append("return $r;").softNewLine();
         writer.outdent().append("}").softNewLine();
 
-        String cls = context.getParameterName(1);
         writer.append("if").ws().append("(!").append(cls).append(".hasOwnProperty('$$constructor$$'))")
                 .ws().append("{").indent().softNewLine();
         writer.append("return null;").softNewLine();