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[flang][runtime] Better handling of "fort.N" opening errors #96347

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Merged
merged 1 commit into from
Jun 24, 2024
Merged

[flang][runtime] Better handling of "fort.N" opening errors #96347

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18 changes: 13 additions & 5 deletions flang/runtime/external-unit.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -65,10 +65,17 @@ ExternalFileUnit *ExternalFileUnit::LookUpOrCreateAnonymous(int unit,
bool exists{false};
ExternalFileUnit *result{GetUnitMap().LookUpOrCreate(unit, handler, exists)};
if (result && !exists) {
result->OpenAnonymousUnit(
dir == Direction::Input ? OpenStatus::Unknown : OpenStatus::Replace,
Action::ReadWrite, Position::Rewind, Convert::Unknown, handler);
result->isUnformatted = isUnformatted;
if (!result->OpenAnonymousUnit(
dir == Direction::Input ? OpenStatus::Unknown : OpenStatus::Replace,
Action::ReadWrite, Position::Rewind, Convert::Unknown, handler)) {
// fort.N isn't a writable file
if (ExternalFileUnit * closed{LookUpForClose(result->unitNumber())}) {
closed->DestroyClosed();
}
result = nullptr;
} else {
result->isUnformatted = isUnformatted;
}
}
return result;
}
Expand Down Expand Up @@ -183,7 +190,7 @@ bool ExternalFileUnit::OpenUnit(Fortran::common::optional<OpenStatus> status,
return impliedClose;
}

void ExternalFileUnit::OpenAnonymousUnit(
bool ExternalFileUnit::OpenAnonymousUnit(
Fortran::common::optional<OpenStatus> status,
Fortran::common::optional<Action> action, Position position,
Convert convert, IoErrorHandler &handler) {
Expand All @@ -193,6 +200,7 @@ void ExternalFileUnit::OpenAnonymousUnit(
std::snprintf(path.get(), pathMaxLen, "fort.%d", unitNumber_);
OpenUnit(status, action, position, std::move(path), std::strlen(path.get()),
convert, handler);
return IsConnected();
}

void ExternalFileUnit::CloseUnit(CloseStatus status, IoErrorHandler &handler) {
Expand Down
2 changes: 1 addition & 1 deletion flang/runtime/pseudo-unit.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -65,7 +65,7 @@ bool ExternalFileUnit::OpenUnit(Fortran::common::optional<OpenStatus> status,
handler.Crash("%s: unsupported", RT_PRETTY_FUNCTION);
}

void ExternalFileUnit::OpenAnonymousUnit(Fortran::common::optional<OpenStatus>,
bool ExternalFileUnit::OpenAnonymousUnit(Fortran::common::optional<OpenStatus>,
Fortran::common::optional<Action>, Position, Convert convert,
IoErrorHandler &handler) {
handler.Crash("%s: unsupported", RT_PRETTY_FUNCTION);
Expand Down
2 changes: 1 addition & 1 deletion flang/runtime/unit.h
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Original file line number Diff line number Diff line change
Expand Up @@ -134,7 +134,7 @@ class ExternalFileUnit : public ConnectionState,
RT_API_ATTRS bool OpenUnit(Fortran::common::optional<OpenStatus>,
Fortran::common::optional<Action>, Position, OwningPtr<char> &&path,
std::size_t pathLength, Convert, IoErrorHandler &);
RT_API_ATTRS void OpenAnonymousUnit(Fortran::common::optional<OpenStatus>,
RT_API_ATTRS bool OpenAnonymousUnit(Fortran::common::optional<OpenStatus>,
Fortran::common::optional<Action>, Position, Convert, IoErrorHandler &);
RT_API_ATTRS void CloseUnit(CloseStatus, IoErrorHandler &);
RT_API_ATTRS void DestroyClosed();
Expand Down
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