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8275517: Off-by-one error in allocation #6018

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@@ -46,7 +46,7 @@ static const char* allocate(oop string) {
const typeArrayOop value = java_lang_String::value(string);
if (value != nullptr) {
const int length = java_lang_String::utf8_length(string, value);
str = NEW_C_HEAP_ARRAY(char, length, mtServiceability);
str = NEW_C_HEAP_ARRAY(char, length + 1, mtServiceability);
java_lang_String::as_utf8_string(string, value, str, length + 1);
return str;
@@ -94,9 +94,7 @@ FinalizerEntry::FinalizerEntry(const InstanceKlass* ik) :
_total_finalizers_run(0) {}

FinalizerEntry::~FinalizerEntry() {
if (_codesource != nullptr) {
FREE_C_HEAP_ARRAY(char, _codesource);
FREE_C_HEAP_ARRAY(char, _codesource);

const InstanceKlass* FinalizerEntry::klass() const {