8010310: [javadoc] Error processing sources with -private

Reviewed-by: vromero, mcimadamore

src/share/classes/com/sun/tools/javac/code/Symbol.java

@@ -1179,7 +1179,7 @@ public abstract class Symbol implements Element {
         /**
          * The variable's constant value, if this is a constant.
          * Before the constant value is evaluated, it points to an
-         * initalizer environment.  If this is not a constant, it can
+         * initializer environment.  If this is not a constant, it can
          * be used for other stuff.
          */
         private Object data;

src/share/classes/com/sun/tools/javadoc/JavadocMemberEnter.java

@@ -30,9 +30,12 @@ import com.sun.tools.javac.code.Flags;
 import com.sun.tools.javac.code.Kinds;
 import com.sun.tools.javac.code.Symbol.*;
 import com.sun.tools.javac.comp.MemberEnter;
+import com.sun.tools.javac.tree.JCTree;
 import com.sun.tools.javac.tree.JCTree.*;
 import com.sun.tools.javac.util.Context;
 
+import static com.sun.tools.javac.code.Flags.*;
+
 /**
  *  Javadoc's own memberEnter phase does a few things above and beyond that
  *  done by javac.
@@ -86,6 +89,17 @@ public class JavadocMemberEnter extends MemberEnter {
 
     @Override
     public void visitVarDef(JCVariableDecl tree) {
+        if (tree.init != null) {
+            boolean isFinal = (tree.mods.flags & FINAL) != 0
+                    || (env.enclClass.mods.flags & INTERFACE) != 0;
+            if (!isFinal || containsNonConstantExpression(tree.init)) {
+                // Avoid unnecessary analysis and release resources.
+                // In particular, remove non-constant expressions
+                // which may trigger Attr.attribClass, since
+                // method bodies are also removed, in visitMethodDef.
+                tree.init = null;
+            }
+        }
         super.visitVarDef(tree);
         if (tree.sym != null &&
                 tree.sym.kind == Kinds.VAR &&
@@ -101,4 +115,95 @@ public class JavadocMemberEnter extends MemberEnter {
     private static boolean isParameter(VarSymbol var) {
         return (var.flags() & Flags.PARAMETER) != 0;
     }
+
+    /**
+     * Simple analysis of an expression tree to see if it contains tree nodes
+     * for any non-constant expression. This does not include checking references
+     * to other fields which may or may not be constant.
+     */
+    private static boolean containsNonConstantExpression(JCExpression tree) {
+        return new MaybeConstantExpressionScanner().containsNonConstantExpression(tree);
+    }
+
+    /**
+     * See JLS 15.18, Constant Expression
+     */
+    private static class MaybeConstantExpressionScanner extends JCTree.Visitor {
+        boolean maybeConstantExpr = true;
+
+        public boolean containsNonConstantExpression(JCExpression tree) {
+            scan(tree);
+            return !maybeConstantExpr;
+        }
+
+        public void scan(JCTree tree) {
+            // short circuit scan when end result is definitely false
+            if (maybeConstantExpr && tree != null)
+                tree.accept(this);
+        }
+
+        @Override
+        /** default for any non-overridden visit method. */
+        public void visitTree(JCTree tree) {
+            maybeConstantExpr = false;
+        }
+
+        @Override
+        public void visitBinary(JCBinary tree) {
+            switch (tree.getTag()) {
+                case MUL: case DIV: case MOD:
+                case PLUS: case MINUS:
+                case SL: case SR: case USR:
+                case LT: case LE: case GT: case GE:
+                case EQ: case NE:
+                case BITAND: case BITXOR: case BITOR:
+                case AND: case OR:
+                    break;
+                default:
+                    maybeConstantExpr = false;
+            }
+        }
+
+        @Override
+        public void visitConditional(JCConditional tree) {
+            scan(tree.cond);
+            scan(tree.truepart);
+            scan(tree.falsepart);
+        }
+
+        @Override
+        public void visitIdent(JCIdent tree) { }
+
+        @Override
+        public void visitLiteral(JCLiteral tree) { }
+
+        @Override
+        public void visitParens(JCParens tree) {
+            scan(tree.expr);
+        }
+
+        @Override
+        public void visitSelect(JCTree.JCFieldAccess tree) {
+            scan(tree.selected);
+        }
+
+        @Override
+        public void visitTypeCast(JCTypeCast tree) {
+            scan(tree.clazz);
+            scan(tree.expr);
+        }
+
+        @Override
+        public void visitTypeIdent(JCPrimitiveTypeTree tree) { }
+
+        @Override
+        public void visitUnary(JCUnary tree) {
+            switch (tree.getTag()) {
+                case POS: case NEG: case COMPL: case NOT:
+                    break;
+                default:
+                    maybeConstantExpr = false;
+            }
+        }
+    }
 }

test/tools/javadoc/nonConstExprs/Test.java

+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * @test
+ * @bug     8010310
+ * @summary Error processing sources with -private
+ */
+
+import java.io.File;
+
+public class Test {
+    public static void main(String... args) throws Exception {
+        File testSrc = new File(System.getProperty("test.src"));
+        String[] jdoc_args = {
+            "-d", "out",
+            new File(testSrc, Test.class.getSimpleName() + ".java").getPath()
+        };
+        int rc = com.sun.tools.javadoc.Main.execute(jdoc_args);
+        if (rc != 0)
+            throw new Exception("unexpected return code from javadoc: " + rc);
+    }
+
+    static int array[] = { 1, 2, 3};
+    static int method(int p) { return p; }
+    static int value = 0;
+
+    public int not_static_not_final = 1;
+    public static int static_not_final = 2;
+    public final int not_static_final = 3;
+    public static final int static_final = 4;
+
+    public static final int array_index = array[0];
+    public static final int method_call = method(0);
+    public static final int inner_class = new Test() { }.method(0);
+    public static final int new_class = new Test().method(0);
+    public static final int pre_inc = ++value;
+    public static final int pre_dec = --value;
+    public static final int post_inc = value++;
+    public static final int post_dec = value--;
+}
+