author | darcy |
Wed, 22 Jan 2014 23:20:58 -0800 | |
changeset 22567 | 5816a47fa4dd |
parent 5506 | 202f599c92aa |
child 25522 | 10d789df41bb |
permissions | -rw-r--r-- |
2 | 1 |
/* |
22567
5816a47fa4dd
8032047: Fix static lint warnings in client libraries
darcy
parents:
5506
diff
changeset
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* Copyright (c) 1994, 2014, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package sun.tools.tree; |
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import sun.tools.java.*; |
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import sun.tools.asm.Assembler; |
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import sun.tools.asm.Label; |
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import sun.tools.asm.TryData; |
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import sun.tools.asm.CatchData; |
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import java.io.PrintStream; |
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import java.util.Hashtable; |
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/** |
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* WARNING: The contents of this source file are not part of any |
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* supported API. Code that depends on them does so at its own risk: |
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* they are subject to change or removal without notice. |
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*/ |
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public |
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class SynchronizedStatement extends Statement { |
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Expression expr; |
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Statement body; |
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boolean needReturnSlot; // set by inner return statement |
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/** |
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* Constructor |
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*/ |
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public SynchronizedStatement(long where, Expression expr, Statement body) { |
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super(SYNCHRONIZED, where); |
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this.expr = expr; |
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this.body = body; |
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} |
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/** |
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* Check statement |
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*/ |
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Vset check(Environment env, Context ctx, Vset vset, Hashtable exp) { |
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checkLabel(env, ctx); |
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CheckContext newctx = new CheckContext(ctx, this); |
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vset = reach(env, vset); |
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vset = expr.checkValue(env, newctx, vset, exp); |
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if (expr.type.equals(Type.tNull)) { |
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env.error(expr.where, "synchronized.null"); |
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} |
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expr = convert(env, newctx, Type.tClass(idJavaLangObject), expr); |
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vset = body.check(env, newctx, vset, exp); |
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return ctx.removeAdditionalVars(vset.join(newctx.vsBreak)); |
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} |
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/** |
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* Inline |
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*/ |
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public Statement inline(Environment env, Context ctx) { |
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if (body != null) { |
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body = body.inline(env, ctx); |
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} |
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expr = expr.inlineValue(env, ctx); |
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return this; |
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} |
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/** |
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* Create a copy of the statement for method inlining |
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*/ |
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public Statement copyInline(Context ctx, boolean valNeeded) { |
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SynchronizedStatement s = (SynchronizedStatement)clone(); |
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s.expr = expr.copyInline(ctx); |
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if (body != null) { |
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s.body = body.copyInline(ctx, valNeeded); |
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} |
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return s; |
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} |
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/** |
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* Compute cost of inlining this statement |
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*/ |
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public int costInline(int thresh, Environment env, Context ctx){ |
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int cost = 1; |
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if (expr != null) { |
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cost += expr.costInline(thresh, env,ctx); |
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if (cost >= thresh) return cost; |
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} |
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if (body != null) { |
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cost += body.costInline(thresh, env,ctx); |
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} |
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return cost; |
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} |
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/** |
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* Code |
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*/ |
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public void code(Environment env, Context ctx, Assembler asm) { |
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ClassDefinition clazz = ctx.field.getClassDefinition(); |
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expr.codeValue(env, ctx, asm); |
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ctx = new Context(ctx); |
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if (needReturnSlot) { |
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Type returnType = ctx.field.getType().getReturnType(); |
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LocalMember localfield = new LocalMember(0, clazz, 0, returnType, |
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idFinallyReturnValue); |
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ctx.declare(env, localfield); |
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22567
5816a47fa4dd
8032047: Fix static lint warnings in client libraries
darcy
parents:
5506
diff
changeset
|
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Environment.debugOutput("Assigning return slot to " + localfield.number); |
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} |
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LocalMember f1 = new LocalMember(where, clazz, 0, Type.tObject, null); |
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LocalMember f2 = new LocalMember(where, clazz, 0, Type.tInt, null); |
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Integer num1 = new Integer(ctx.declare(env, f1)); |
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Integer num2 = new Integer(ctx.declare(env, f2)); |
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Label endLabel = new Label(); |
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TryData td = new TryData(); |
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td.add(null); |
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// lock the object |
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asm.add(where, opc_astore, num1); |
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asm.add(where, opc_aload, num1); |
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asm.add(where, opc_monitorenter); |
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// Main body |
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CodeContext bodyctx = new CodeContext(ctx, this); |
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asm.add(where, opc_try, td); |
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if (body != null) { |
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body.code(env, bodyctx, asm); |
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} else { |
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asm.add(where, opc_nop); |
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} |
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asm.add(bodyctx.breakLabel); |
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asm.add(td.getEndLabel()); |
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// Cleanup afer body |
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asm.add(where, opc_aload, num1); |
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asm.add(where, opc_monitorexit); |
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asm.add(where, opc_goto, endLabel); |
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// Catch code |
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CatchData cd = td.getCatch(0); |
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asm.add(cd.getLabel()); |
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asm.add(where, opc_aload, num1); |
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asm.add(where, opc_monitorexit); |
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asm.add(where, opc_athrow); |
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// Final body |
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asm.add(bodyctx.contLabel); |
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asm.add(where, opc_astore, num2); |
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asm.add(where, opc_aload, num1); |
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asm.add(where, opc_monitorexit); |
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asm.add(where, opc_ret, num2); |
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asm.add(endLabel); |
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} |
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/** |
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*/ |
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public void print(PrintStream out, int indent) { |
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super.print(out, indent); |
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out.print("synchronized "); |
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expr.print(out); |
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out.print(" "); |
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if (body != null) { |
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body.print(out, indent); |
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} else { |
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out.print("{}"); |
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} |
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} |
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} |