GC stress fixes and other bugfixes; classpath progress

classpath/java/lang/Math.java

@@ -0,0 +1,77 @@
+package java.lang;
+
+public final class Math {
+  private Math() { }
+
+  public static int abs(int v) {
+    return (v < 0 ? -v : v);
+  }
+
+  public static long round(double v) {
+    return (long) (v + 0.5);
+  }
+
+  public static int round(float v) {
+    return (int) (v + 0.5);
+  }
+
+  public static double floor(double v) {
+    // todo
+    return 0;
+  }
+
+  public static double ceil(double v) {
+    // todo
+    return 0;
+  }
+
+  public static double exp(double v) {
+    // todo
+    return 0;
+  }
+
+  public static double log(double v) {
+    // todo
+    return 0;
+  }
+
+  public static double cos(double v) {
+    // todo
+    return 0;
+  }
+
+  public static double sin(double v) {
+    // todo
+    return 0;
+  }
+
+  public static double tan(double v) {
+    // todo
+    return 0;
+  }
+
+  public static double acos(double v) {
+    // todo
+    return 0;
+  }
+
+  public static double asin(double v) {
+    // todo
+    return 0;
+  }
+
+  public static double atan(double v) {
+    // todo
+    return 0;
+  }
+
+  public static double sqrt(double v) {
+    // todo
+    return 0;
+  }
+
+  public static double pow(double v, double e) {
+    // todo
+    return 0;
+  }
+}