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src: fix reading empty string views in Blob[De]serializer #52000

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Merged
merged 2 commits into from
Mar 10, 2024
Merged

src: fix reading empty string views in Blob[De]serializer #52000

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f9d846f
src: fix reading empty string views in Blob[De]serializer
joyeecheung Mar 7, 2024
66281f7
fixup! src: fix reading empty string views in Blob[De]serializer
joyeecheung Mar 7, 2024
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4 changes: 3 additions & 1 deletion src/api/environment.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -553,7 +553,9 @@ MaybeLocal<Value> LoadEnvironment(Environment* env,
MaybeLocal<Value> LoadEnvironment(Environment* env,
std::string_view main_script_source_utf8,
EmbedderPreloadCallback preload) {
CHECK_NOT_NULL(main_script_source_utf8.data());
// It could be empty when it's used by SEA to load an empty script.
CHECK_IMPLIES(main_script_source_utf8.size() > 0,
main_script_source_utf8.data());
return LoadEnvironment(
env,
[&](const StartExecutionCallbackInfo& info) -> MaybeLocal<Value> {
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9 changes: 9 additions & 0 deletions src/blob_serializer_deserializer-inl.h
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Expand Up @@ -139,6 +139,11 @@ std::string_view BlobDeserializer<Impl>::ReadStringView(StringLogMode mode) {
size_t length = ReadArithmetic<size_t>();
Debug("ReadStringView(), length=%zu: ", length);

if (length == 0) {
Debug("ReadStringView() read an empty view\n");
return std::string_view();
}

std::string_view result(sink.data() + read_total, length);
Debug("%p, read %zu bytes", result.data(), result.size());
if (mode == StringLogMode::kAddressAndContent) {
Expand Down Expand Up @@ -269,6 +274,10 @@ size_t BlobSerializer<Impl>::WriteStringView(std::string_view data,
size_t written_total = WriteArithmetic<size_t>(data.size());

size_t length = data.size();
if (length == 0) {
Debug("WriteStringView() wrote an empty view\n");
return written_total;
}
sink.insert(sink.end(), data.data(), data.data() + length);
written_total += length;

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