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GP-3429 Intersect tests for stack affecting ops

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This commit is contained in:
caheckman 2023-07-07 21:39:36 +00:00
parent d932173a25
commit 67b22166af
12 changed files with 432 additions and 15 deletions
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29
Ghidra/Features/Decompiler/src/decompile/cpp/merge.cc
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@ -60,6 +60,34 @@ int4 BlockVarnode::findFront(int4 blocknum,const vector<BlockVarnode> &list)
return min;
}
void StackAffectingOps::populate(void)
{
for(int4 i=0;i<data.numCalls();++i) {
PcodeOp *op = data.getCallSpecs(i)->getOp();
addOp(op);
}
const list<LoadGuard> &storeGuard( data.getStoreGuards() );
for(list <LoadGuard>::const_iterator iter=storeGuard.begin();iter!=storeGuard.end();++iter) {
if ((*iter).isValid(CPUI_STORE))
addOp((*iter).getOp());
}
finalize();
}
bool StackAffectingOps::affectsTest(PcodeOp *op,Varnode *vn) const
{
if (op->code() == CPUI_STORE) {
const LoadGuard *loadGuard = data.getStoreGuard(op);
if (loadGuard == (const LoadGuard *)0)
return true;
return loadGuard->isGuarded(vn->getAddr());
}
// We could conceivably do secondary testing of CALL ops here
return true;
}
/// \brief Required tests to merge HighVariables that are not Cover related
///
/// This is designed to short circuit merge tests, when we know properties of the
@ -1571,6 +1599,7 @@ void Merge::clear(void)
testCache.clear();
copyTrims.clear();
protoPartial.clear();
stackAffectingOps.clear();
}
/// \brief Inflate the Cover of a given Varnode with a HighVariable