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xo-reader2: bugfix: checkpoint before allocating SSMs

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This commit is contained in:
Roland Conybeare 2026-02-16 11:03:09 -05:00
commit 66d9bc5cd6
18 changed files with 78 additions and 36 deletions
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8
src/reader2/ParserStateMachine.cpp
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@ -75,18 +75,20 @@ namespace xo {
assert(stack_ == nullptr);
this->stack_ = ParserStack::push(nullptr /*stack*/, parser_alloc_, ssm);
DArena::Checkpoint ckp = parser_alloc_.checkpoint();
this->stack_ = ParserStack::push(nullptr /*stack*/, ckp, parser_alloc_, ssm);
this->parser_alloc_ckp_ = parser_alloc_.checkpoint();
}
void
ParserStateMachine::push_ssm(obj<ASyntaxStateMachine> ssm)
ParserStateMachine::push_ssm(DArena::Checkpoint ckp, obj<ASyntaxStateMachine> ssm)
{
scope log(XO_DEBUG(debug_flag_));
// note: using parser_alloc_ for parser stack, since stacklike behavior
this->stack_ = ParserStack::push(stack_, parser_alloc_, ssm);
this->stack_ = ParserStack::push(stack_, ckp, parser_alloc_, ssm);
}
void