test/java/lang/StackWalker/LocalsAndOperands.java

*** 84,116 ****
          if (extended) {
              for (StackWalker.StackFrame f : frames) {
                  System.out.println("frame: " + f);
                  Object[] locals = (Object[]) getLocals.invoke(f);
                  for (int i = 0; i < locals.length; i++) {
!                     System.out.format("local %d: %s type %s%n", i, locals[i], type(locals[i]));
                  }
  
                  Object[] operands = (Object[]) getOperands.invoke(f);
                  for (int i = 0; i < operands.length; i++) {
!                     System.out.format("operand %d: %s type %s%n", i, operands[i], type(operands[i]));
                  }
  
                  Object[] monitors = (Object[]) getMonitors.invoke(f);
                  for (int i = 0; i < monitors.length; i++) {
!                     System.out.format("monitor %d: %s%n", i, monitors[i]);
                  }
              }
          } else {
              for (StackFrame f : frames) {
!                 if (liveStackFrameClass.isInstance(f))
                      throw new RuntimeException("should not be LiveStackFrame");
              }
          }
      }
  
      String type(Object o) throws Exception {
!         if (primitiveValueClass.isInstance(o)) {
              char c = (char)primitiveType.invoke(o);
              return String.valueOf(c);
          } else {
              return o.getClass().getName();
          }
--- 84,130 ----
          if (extended) {
              for (StackWalker.StackFrame f : frames) {
                  System.out.println("frame: " + f);
                  Object[] locals = (Object[]) getLocals.invoke(f);
                  for (int i = 0; i < locals.length; i++) {
!                     System.out.format("  local %d: %s type %s\n", i, locals[i], type(locals[i]));
! 
!                     // check for non-null locals in LocalsAndOperands.test()
!                     if (f.getClassName().equals("LocalsAndOperands") &&
!                             f.getMethodName().equals("test")) {
!                         if (locals[i] == null) {
!                             throw new RuntimeException("kept-alive locals should not be null");
!                         }
!                     }
                  }
  
                  Object[] operands = (Object[]) getOperands.invoke(f);
                  for (int i = 0; i < operands.length; i++) {
!                     System.out.format("  operand %d: %s type %s%n", i, operands[i],
!                                       type(operands[i]));
                  }
  
                  Object[] monitors = (Object[]) getMonitors.invoke(f);
                  for (int i = 0; i < monitors.length; i++) {
!                     System.out.format("  monitor %d: %s%n", i, monitors[i]);
                  }
              }
          } else {
              for (StackFrame f : frames) {
!                 if (liveStackFrameClass.isInstance(f)) {
                      throw new RuntimeException("should not be LiveStackFrame");
                  }
              }
          }
+         // Use local variables so they stay alive
+         System.out.println("Stayin' alive: "+x+" "+c+" "+hi+" "+l+" "+d);
+     }
  
      String type(Object o) throws Exception {
!         if (o == null) {
!             return "null";
!         } else if (primitiveValueClass.isInstance(o)) {
              char c = (char)primitiveType.invoke(o);
              return String.valueOf(c);
          } else {
              return o.getClass().getName();
          }