test/lib/testlibrary/jsr292/com/oracle/testlibrary/jsr292/Helper.java

rev 10362 : 8057707: TEST library enhancement: copy sun.hotspot.whitebox classes from hotspot repo and enhance lib/testlibrary/jsr292/com/oracle/testlibrary/jsr292/Helper.java
Reviewed-by: iignatyev

*** 50,60 ****
      }
  
      public static final long TEST_LIMIT;
      static {
          String str = System.getProperty("testLimit");
!         TEST_LIMIT = str != null ? Long.parseUnsignedLong(str) : 2_000L;
          System.out.printf("-DtestLimit=%d%n", TEST_LIMIT);
      }
  
      public static final int MAX_ARITY = 254;
      public static final String MISSING_ARG = "missingArg";
--- 50,60 ----
      }
  
      public static final long TEST_LIMIT;
      static {
          String str = System.getProperty("testLimit");
!         TEST_LIMIT = str != null ? Long.parseUnsignedLong(str) : 2000L;
          System.out.printf("-DtestLimit=%d%n", TEST_LIMIT);
      }
  
      public static final int MAX_ARITY = 254;
      public static final String MISSING_ARG = "missingArg";
*** 114,123 ****
--- 114,165 ----
      public static List<Object> getCalled(int lag) {
          int size = calledLog.size();
          return size <= lag ? null : calledLog.get(size - lag - 1);
      }
  
+     public static List<Class<?>> randomClasses(Class<?>[] classes, int size) {
+         List<Class<?>> result = new ArrayList<>(size);
+         for (int i = 0; i < size; ++i) {
+             result.add(classes[RNG.nextInt(classes.length)]);
+         }
+         return result;
+     }
+ 
+     public static List<Class<?>> getParams(List<Class<?>> classes,
+             boolean isVararg, int argsCount) {
+         boolean unmodifiable = true;
+         List<Class<?>> result = classes.subList(0,
+                 Math.min(argsCount, (MAX_ARITY / 2) - 1));
+         int extra = 0;
+         if (argsCount >= MAX_ARITY / 2) {
+             result = new ArrayList<>(result);
+             unmodifiable = false;
+             extra = (int) result.stream().filter(Helper::isDoubleCost).count();
+             int i = result.size();
+             while (result.size() + extra < argsCount) {
+                 Class<?> aClass = classes.get(i);
+                 if (Helper.isDoubleCost(aClass)) {
+                     ++extra;
+                     if (result.size() + extra >= argsCount) {
+                         break;
+                     }
+                 }
+                 result.add(aClass);
+             }
+         }
+         if (isVararg && result.size() > 0) {
+             if (unmodifiable) {
+                 result = new ArrayList<>(result);
+             }
+             int last = result.size() - 1;
+             Class<?> aClass = result.get(last);
+             aClass = Array.newInstance(aClass, 2).getClass();
+             result.set(last, aClass);
+         }
+         return result;
+     }
+ 
      public static MethodHandle addTrailingArgs(MethodHandle target, int nargs,
              List<Class<?>> classes) {
          int targetLen = target.type().parameterCount();
          int extra = (nargs - targetLen);
          if (extra <= 0) {
*** 228,238 ****
  
      public static Object[] randomArgs(List<Class<?>> params) {
          return randomArgs(params.toArray(new Class<?>[params.size()]));
      }
  
!     private static Object castToWrapper(Object value, Class<?> dst) {
          Object wrap = null;
          if (value instanceof Number) {
              wrap = castToWrapperOrNull(((Number) value).longValue(), dst);
          }
          if (value instanceof Character) {
--- 270,280 ----
  
      public static Object[] randomArgs(List<Class<?>> params) {
          return randomArgs(params.toArray(new Class<?>[params.size()]));
      }
  
!     public static Object castToWrapper(Object value, Class<?> dst) {
          Object wrap = null;
          if (value instanceof Number) {
              wrap = castToWrapperOrNull(((Number) value).longValue(), dst);
          }
          if (value instanceof Character) {
*** 266,276 ****
              return (double) (value);
          }
          if (dst == byte.class || dst == Byte.class) {
              return (byte) (value);
          }
!         if (dst == boolean.class || dst == boolean.class) {
              return ((value % 29) & 1) == 0;
          }
          return null;
      }
  }
--- 308,318 ----
              return (double) (value);
          }
          if (dst == byte.class || dst == Byte.class) {
              return (byte) (value);
          }
!         if (dst == boolean.class || dst == Boolean.class) {
              return ((value % 29) & 1) == 0;
          }
          return null;
      }
  }