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8313809: String template fails with java.lang.StringIndexOutOfBoundsException if last fragment is UTF16

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Reviewed-by: redestad
This commit is contained in:
Jim Laskey 2023-08-08 19:33:44 +00:00
parent 509f80bb04
commit 6864441163
2 changed files with 47 additions and 4 deletions
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8
src/java.base/share/classes/java/lang/invoke/StringConcatFactory.java
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@ -1107,10 +1107,9 @@ public final class StringConcatFactory {
MethodHandle mh = MethodHandles.dropArguments(newString(), 2, ttypes);
long initialLengthCoder = INITIAL_CODER;
String lastFragment = "";
pos = 0;
for (String fragment : fragments) {
lastFragment = fragment;
initialLengthCoder = JLA.stringConcatMix(initialLengthCoder, fragment);
if (ttypes.length <= pos) {
break;
@ -1118,14 +1117,15 @@ public final class StringConcatFactory {
Class<?> ttype = ttypes[pos];
// (long,byte[],ttype) -> long
MethodHandle prepender = prepender(lastFragment.isEmpty() ? null : fragment, ttype);
initialLengthCoder = JLA.stringConcatMix(initialLengthCoder, fragment);
MethodHandle prepender = prepender(fragment.isEmpty() ? null : fragment, ttype);
// (byte[],long,ttypes...) -> String (unchanged)
mh = MethodHandles.filterArgumentsWithCombiner(mh, 1, prepender,1, 0, 2 + pos);
pos++;
}
String lastFragment = fragments.getLast();
initialLengthCoder -= lastFragment.length();
MethodHandle newArrayCombinator = lastFragment.isEmpty() ? newArray() :
newArrayWithSuffix(lastFragment);
// (long,ttypes...) -> String