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Fix coredump on fork inside disable named block by adding an UNSUPPORTED

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Wilson Snyder
2025-02-27 21:42:20 -05:00
parent 098ee6fa7a
commit a9762e0c5c
3 changed files with 29 additions and 4 deletions
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src/V3LinkJump.cpp
+19 -4
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@@ -46,8 +46,10 @@ class LinkJumpVisitor final : public VNVisitor {
// NODE STATE
// AstNode::user1() -> AstJumpLabel*, for this block if endOfIter
// AstNode::user2() -> AstJumpLabel*, for this block if !endOfIter
// AstNodeBlock::user3() -> bool, true if contains a fork
const VNUser1InUse m_user1InUse;
const VNUser2InUse m_user2InUse;
const VNUser3InUse m_user3InUse;
// STATE
AstNodeModule* m_modp = nullptr; // Current module
@@ -178,7 +180,16 @@ class LinkJumpVisitor final : public VNVisitor {
VL_RESTORER(m_unrollFull);
m_blockStack.push_back(nodep);
{
m_inFork = m_inFork || VN_IS(nodep, Fork);
if (VN_IS(nodep, Fork)) {
m_inFork = true; // And remains set for children
// Mark all upper blocks also, can stop once see
// one set to avoid O(n^2)
for (auto itr : vlstd::reverse_view(m_blockStack)) {
if (itr->user3()) break;
itr->user3(true);
}
}
nodep->user3(m_inFork);
iterateChildren(nodep);
}
m_blockStack.pop_back();
@@ -340,9 +351,13 @@ class LinkJumpVisitor final : public VNVisitor {
nodep->v3warn(E_UNSUPPORTED,
"disable isn't underneath a begin with name: " << nodep->prettyNameQ());
} else if (AstBegin* const beginp = VN_CAST(blockp, Begin)) {
// Jump to the end of the named block
AstJumpLabel* const labelp = findAddLabel(beginp, false);
nodep->addNextHere(new AstJumpGo{nodep->fileline(), labelp});
if (beginp->user3()) {
nodep->v3warn(E_UNSUPPORTED, "Unsupported: disabling block that contains a fork");
} else {
// Jump to the end of the named block
AstJumpLabel* const labelp = findAddLabel(beginp, false);
nodep->addNextHere(new AstJumpGo{nodep->fileline(), labelp});
}
} else {
nodep->v3warn(E_UNSUPPORTED, "Unsupported: disabling fork by name");
}