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8178843: A bug in an inner loop in MethodGenerator's getLocals method

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Reviewed-by: lancea
This commit is contained in:
Joe Wang 2019-07-11 15:58:54 +00:00
parent 61d10a507d
commit ea81ec7896
1 changed files with 20 additions and 44 deletions
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64
src/java.xml/share/classes/com/sun/org/apache/xalan/internal/xsltc/compiler/util/MethodGenerator.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
*/
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
@ -75,7 +75,7 @@ import java.util.Stack;
/**
* @author Jacek Ambroziak
* @author Santiago Pericas-Geertsen
* @LastModified: Nov 2017
* @LastModified: July 2019
*/
public class MethodGenerator extends MethodGen
implements com.sun.org.apache.xalan.internal.xsltc.compiler.Constants {
@ -207,7 +207,7 @@ public class MethodGenerator extends MethodGen
_nextNode = new INVOKEINTERFACE(index, 1);
_slotAllocator = new SlotAllocator();
_slotAllocator.initialize(getLocalVariableRegistry().getLocals(false));
_slotAllocator.initialize(getLocalVariableRegistry().getLocals());
_allocatorInit = true;
}
@ -445,7 +445,7 @@ public class MethodGenerator extends MethodGen
}
}
} else {
_nameToLVGMap.remove(lvg);
_nameToLVGMap.remove(lvg.getName());
}
}
@ -480,55 +480,31 @@ public class MethodGenerator extends MethodGen
}
/**
* <p>Gets all {@link LocalVariableGen} objects for this method.</p>
* <p>When the <code>includeRemoved</code> argument has the value
* <code>false</code>, this method replaces uses of
* {@link MethodGen#getLocalVariables()} which has
* Gets all {@link LocalVariableGen} objects.
* This method replaces {@link MethodGen#getLocalVariables()} which has
* a side-effect of setting the start and end range for any
* <code>LocalVariableGen</code> if either was <code>null</code>. That
* {@code LocalVariableGen} if either was {@code null}. That
* side-effect causes problems for outlining of code in XSLTC.
* @param includeRemoved Specifies whether all local variables ever
* declared should be returned (<code>true</code>) or only those not
* removed (<code>false</code>)
* @return an array of <code>LocalVariableGen</code> containing all the
*
* @return an array of {@code LocalVariableGen} containing all the
* local variables
*/
@SuppressWarnings("unchecked")
protected LocalVariableGen[] getLocals(boolean includeRemoved) {
private LocalVariableGen[] getLocals() {
LocalVariableGen[] locals = null;
List<LocalVariableGen> allVarsEverDeclared = new ArrayList<>();
if (includeRemoved) {
int slotCount = allVarsEverDeclared.size();
for (int i = 0; i < slotCount; i++) {
Object slotEntries = _variables.get(i);
if (slotEntries != null) {
if (slotEntries instanceof ArrayList) {
List<LocalVariableGen> slotList =
(List<LocalVariableGen>)slotEntries;
for (int j = 0; j < slotList.size(); j++) {
allVarsEverDeclared.add(slotList.get(i));
}
} else {
allVarsEverDeclared.add((LocalVariableGen)slotEntries);
}
}
}
} else {
for (Map.Entry<String, Object> nameVarsPair : _nameToLVGMap.entrySet()) {
Object vars = nameVarsPair.getValue();
if (vars != null) {
if (vars instanceof ArrayList) {
List<LocalVariableGen> varsList =
(List<LocalVariableGen>) vars;
for (int i = 0; i < varsList.size(); i++) {
allVarsEverDeclared.add(varsList.get(i));
}
} else {
allVarsEverDeclared.add((LocalVariableGen)vars);
for (Map.Entry<String, Object> nameVarsPair : _nameToLVGMap.entrySet()) {
Object vars = nameVarsPair.getValue();
if (vars != null) {
if (vars instanceof ArrayList) {
List<LocalVariableGen> varsList =
(List<LocalVariableGen>) vars;
for (int i = 0; i < varsList.size(); i++) {
allVarsEverDeclared.add(varsList.get(i));
}
} else {
allVarsEverDeclared.add((LocalVariableGen)vars);
}
}
}