fergalmoran/ladybird
1
0
Fork 0
mirror of https://github.com/fergalmoran/ladybird.git synced 2025-12-22 09:19:03 +00:00
Code Issues Packages Projects Releases Wiki Activity

LibJS: Throw RangeError in StringPrototype::repeat if OOM

Browse Source 
currently crashes with an assertion failure in `String::repeated` if
malloc can't serve a `count * input_size` sized request, so add
`String::repeated_with_error` to propagate the error.
This commit is contained in:
Jess
2024-04-18 21:35:35 +12:00
committed by Tim Flynn
parent f4c8f1a346
commit ecb7d4b40f
5 changed files with 16 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
AK/String.cpp
View File

@@ -308,13 +308,14 @@ bool String::equals_ignoring_ascii_case(StringView other) const
return StringUtils::equals_ignoring_ascii_case(bytes_as_string_view(), other);
}
String String::repeated(String const& input, size_t count)
ErrorOr<String> String::repeated(String const& input, size_t count)
{
VERIFY(!Checked<size_t>::multiplication_would_overflow(count, input.bytes().size()));
if (Checked<size_t>::multiplication_would_overflow(count, input.bytes().size()))
return Error::from_errno(EOVERFLOW);
String result;
size_t input_size = input.bytes().size();
MUST(result.replace_with_new_string(count * input_size, [&](Bytes buffer) {
TRY(result.replace_with_new_string(count * input_size, [&](Bytes buffer) {
if (input_size == 1) {
buffer.fill(input.bytes().first());
} else {
@@ -323,6 +324,7 @@ String String::repeated(String const& input, size_t count)
}
return ErrorOr<void> {};
}));
return result;
}