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LibRegex: Avoid keeping track of checkpoints across forks

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Doing so would increase memory consumption by quite a bit, since many
useless copies of the checkpoints hashmap would be created and later
thrown away.
This commit is contained in:
Ali Mohammad Pur
2021-09-06 16:53:06 +04:30
committed by Ali Mohammad Pur
parent 645e29a88b
commit 88d148b46a
2 changed files with 5 additions and 5 deletions
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8
Userland/Libraries/LibRegex/RegexByteCode.cpp
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@@ -871,17 +871,17 @@ ALWAYS_INLINE ExecutionResult OpCode_ResetRepeat::execute(MatchInput const&, Mat
return ExecutionResult::Continue;
}
ALWAYS_INLINE ExecutionResult OpCode_Checkpoint::execute(MatchInput const&, MatchState& state) const
ALWAYS_INLINE ExecutionResult OpCode_Checkpoint::execute(MatchInput const& input, MatchState& state) const
{
state.checkpoints.set(state.instruction_position, state.string_position);
input.checkpoints.set(state.instruction_position, state.string_position);
return ExecutionResult::Continue;
}
ALWAYS_INLINE ExecutionResult OpCode_JumpNonEmpty::execute(MatchInput const&, MatchState& state) const
ALWAYS_INLINE ExecutionResult OpCode_JumpNonEmpty::execute(MatchInput const& input, MatchState& state) const
{
auto current_position = state.string_position;
auto checkpoint_ip = state.instruction_position + size() + checkpoint();
if (state.checkpoints.get(checkpoint_ip).value_or(current_position) != current_position) {
if (input.checkpoints.get(checkpoint_ip).value_or(current_position) != current_position) {
auto form = this->form();
if (form == OpCodeId::Jump) {