com.google.gwt.dev.jjs.impl.ReplaceCallsToNativeJavaLangObjectOverrides Maven / Gradle / Ivy
/*
* Copyright 2016 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.gwt.dev.jjs.impl;
import com.google.gwt.dev.jjs.ast.Context;
import com.google.gwt.dev.jjs.ast.JMethod;
import com.google.gwt.dev.jjs.ast.JMethodCall;
import com.google.gwt.dev.jjs.ast.JModVisitor;
import com.google.gwt.dev.jjs.ast.JProgram;
import com.google.gwt.dev.jjs.ast.RuntimeConstants;
import com.google.gwt.thirdparty.guava.common.collect.ImmutableSet;
import com.google.gwt.thirdparty.guava.common.collect.Iterables;
import com.google.gwt.thirdparty.guava.common.collect.Sets;
import java.util.Set;
/**
* Replaces direct calls to native methods that override methods from java.lang.Object to directly
* call them through java.lang.Object. This makes sure that the calls are routed through the
* trampoline.
*/
public class ReplaceCallsToNativeJavaLangObjectOverrides {
public static void exec(final JProgram program) {
final Set overridableJavaLangObjectMethods = ImmutableSet.of(
program.getIndexedMethodOrNull(RuntimeConstants.OBJECT_EQUALS),
program.getIndexedMethodOrNull(RuntimeConstants.OBJECT_HASHCODE),
program.getIndexedMethodOrNull(RuntimeConstants.OBJECT_TO_STRING));
new JModVisitor() {
@Override
public void endVisit(JMethodCall x, Context ctx) {
JMethod targetMethod = x.getTarget();
if (!targetMethod.isJsNative()) {
return;
}
JMethod overridenMethod = Iterables.getOnlyElement(
Sets.intersection(targetMethod.getOverriddenMethods(),
overridableJavaLangObjectMethods),
null);
if (overridenMethod == null) {
return;
}
ctx.replaceMe(
new JMethodCall(x.getSourceInfo(), x.getInstance(), overridenMethod, x.getArgs()));
}
}.accept(program);
}
}