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ast: add GC for dev debugging

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This commit is contained in:
Emil J. Tywoniak 2025-04-25 00:49:37 +02:00
parent 272b7fa697
commit d8cae1d904
3 changed files with 104 additions and 0 deletions
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26
frontends/ast/ast.cc
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@ -248,6 +248,9 @@ AstNode::AstNode(AstNodeType type, AstNode *child1, AstNode *child2, AstNode *ch
children.push_back(child4);
fixup_hierarchy_flags();
#ifdef ASTNODE_GC
Tagger::get().reg(this);
#endif
}
// create a (deep recursive) copy of a node
@ -283,12 +286,28 @@ void AstNode::cloneInto(AstNode *other) const
// delete all children in this node
void AstNode::delete_children()
{
#ifdef ASTNODE_GC
for (auto &it : children)
if (Tagger::get().nodes.count(it))
delete it;
else
log("skip child %p\n", it);
#else
for (auto &it : children)
delete it;
#endif
children.clear();
#ifdef ASTNODE_GC
for (auto &it : attributes)
if (Tagger::get().nodes.count(it.second))
delete it.second;
else
log("skip attr %p\n", it.second);
#else
for (auto &it : attributes)
delete it.second;
#endif
attributes.clear();
}
@ -296,7 +315,14 @@ void AstNode::delete_children()
AstNode::~AstNode()
{
astnodes--;
#ifdef ASTNODE_GC
Tagger::get().unreg(this);
#endif
delete_children();
if (yosys_xtrace) {
log("DESTR %X %p\n", hashidx_, this);
log_backtrace("", yosys_xtrace-1);
}
}
// create a nice text representation of the node