0N/A/*
2362N/A * Copyright (c) 1994, 2003, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
2362N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A */
0N/A
0N/Apackage sun.tools.tree;
0N/A
0N/Aimport sun.tools.java.*;
0N/Aimport sun.tools.asm.Assembler;
0N/Aimport sun.tools.asm.Label;
0N/Aimport sun.tools.asm.TryData;
0N/Aimport sun.tools.asm.CatchData;
0N/Aimport java.io.PrintStream;
0N/Aimport java.util.Hashtable;
0N/A
0N/A/**
0N/A * WARNING: The contents of this source file are not part of any
0N/A * supported API. Code that depends on them does so at its own risk:
0N/A * they are subject to change or removal without notice.
0N/A */
0N/Apublic
0N/Aclass SynchronizedStatement extends Statement {
0N/A Expression expr;
0N/A Statement body;
0N/A boolean needReturnSlot; // set by inner return statement
0N/A
0N/A /**
0N/A * Constructor
0N/A */
0N/A public SynchronizedStatement(long where, Expression expr, Statement body) {
0N/A super(SYNCHRONIZED, where);
0N/A this.expr = expr;
0N/A this.body = body;
0N/A }
0N/A
0N/A /**
0N/A * Check statement
0N/A */
0N/A Vset check(Environment env, Context ctx, Vset vset, Hashtable exp) {
0N/A checkLabel(env, ctx);
0N/A CheckContext newctx = new CheckContext(ctx, this);
0N/A vset = reach(env, vset);
0N/A vset = expr.checkValue(env, newctx, vset, exp);
0N/A if (expr.type.equals(Type.tNull)) {
0N/A env.error(expr.where, "synchronized.null");
0N/A }
0N/A expr = convert(env, newctx, Type.tClass(idJavaLangObject), expr);
0N/A vset = body.check(env, newctx, vset, exp);
0N/A return ctx.removeAdditionalVars(vset.join(newctx.vsBreak));
0N/A }
0N/A
0N/A /**
0N/A * Inline
0N/A */
0N/A public Statement inline(Environment env, Context ctx) {
0N/A if (body != null) {
0N/A body = body.inline(env, ctx);
0N/A }
0N/A expr = expr.inlineValue(env, ctx);
0N/A return this;
0N/A }
0N/A
0N/A /**
0N/A * Create a copy of the statement for method inlining
0N/A */
0N/A public Statement copyInline(Context ctx, boolean valNeeded) {
0N/A SynchronizedStatement s = (SynchronizedStatement)clone();
0N/A s.expr = expr.copyInline(ctx);
0N/A if (body != null) {
0N/A s.body = body.copyInline(ctx, valNeeded);
0N/A }
0N/A return s;
0N/A }
0N/A
0N/A /**
0N/A * Compute cost of inlining this statement
0N/A */
0N/A public int costInline(int thresh, Environment env, Context ctx){
0N/A int cost = 1;
0N/A if (expr != null) {
0N/A cost += expr.costInline(thresh, env,ctx);
0N/A if (cost >= thresh) return cost;
0N/A }
0N/A if (body != null) {
0N/A cost += body.costInline(thresh, env,ctx);
0N/A }
0N/A return cost;
0N/A }
0N/A
0N/A /**
0N/A * Code
0N/A */
0N/A public void code(Environment env, Context ctx, Assembler asm) {
0N/A ClassDefinition clazz = ctx.field.getClassDefinition();
0N/A expr.codeValue(env, ctx, asm);
0N/A ctx = new Context(ctx);
0N/A
0N/A if (needReturnSlot) {
0N/A Type returnType = ctx.field.getType().getReturnType();
0N/A LocalMember localfield = new LocalMember(0, clazz, 0, returnType,
0N/A idFinallyReturnValue);
0N/A ctx.declare(env, localfield);
0N/A env.debugOutput("Assigning return slot to " + localfield.number);
0N/A }
0N/A
0N/A LocalMember f1 = new LocalMember(where, clazz, 0, Type.tObject, null);
0N/A LocalMember f2 = new LocalMember(where, clazz, 0, Type.tInt, null);
0N/A Integer num1 = new Integer(ctx.declare(env, f1));
0N/A Integer num2 = new Integer(ctx.declare(env, f2));
0N/A
0N/A Label endLabel = new Label();
0N/A
0N/A TryData td = new TryData();
0N/A td.add(null);
0N/A
0N/A // lock the object
0N/A asm.add(where, opc_astore, num1);
0N/A asm.add(where, opc_aload, num1);
0N/A asm.add(where, opc_monitorenter);
0N/A
0N/A // Main body
0N/A CodeContext bodyctx = new CodeContext(ctx, this);
0N/A asm.add(where, opc_try, td);
0N/A if (body != null) {
0N/A body.code(env, bodyctx, asm);
0N/A } else {
0N/A asm.add(where, opc_nop);
0N/A }
0N/A asm.add(bodyctx.breakLabel);
0N/A asm.add(td.getEndLabel());
0N/A
0N/A // Cleanup afer body
0N/A asm.add(where, opc_aload, num1);
0N/A asm.add(where, opc_monitorexit);
0N/A asm.add(where, opc_goto, endLabel);
0N/A
0N/A // Catch code
0N/A CatchData cd = td.getCatch(0);
0N/A asm.add(cd.getLabel());
0N/A asm.add(where, opc_aload, num1);
0N/A asm.add(where, opc_monitorexit);
0N/A asm.add(where, opc_athrow);
0N/A
0N/A // Final body
0N/A asm.add(bodyctx.contLabel);
0N/A asm.add(where, opc_astore, num2);
0N/A asm.add(where, opc_aload, num1);
0N/A asm.add(where, opc_monitorexit);
0N/A asm.add(where, opc_ret, num2);
0N/A
0N/A asm.add(endLabel);
0N/A }
0N/A
0N/A /**
0N/A * Print
0N/A */
0N/A public void print(PrintStream out, int indent) {
0N/A super.print(out, indent);
0N/A out.print("synchronized ");
0N/A expr.print(out);
0N/A out.print(" ");
0N/A if (body != null) {
0N/A body.print(out, indent);
0N/A } else {
0N/A out.print("{}");
0N/A }
0N/A }
0N/A}