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teach singlevalfields loplugin about function pointers

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Change-Id: I81f77e2b3f94c208866fa8d124b0b00ea5387563
This commit is contained in:
Noel Grandin
2016-06-24 11:17:08 +02:00
parent e1296e295e
commit 358bb8eed4
1 changed files with 58 additions and 27 deletions
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85
compilerplugins/clang/singlevalfields.cxx
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@@ -101,6 +101,7 @@ private:
std::string getExprValue(const Expr*);
bool isInterestingType(const QualType&);
const FunctionDecl* get_top_FunctionDecl_from_Stmt(const Stmt&);
void checkCallExpr(const Stmt* child, const CallExpr* callExpr, std::string& assignValue, bool& bPotentiallyAssignedTo);
};
void SingleValFields::niceName(const FieldDecl* fieldDecl, MyFieldInfo& aInfo)
@@ -239,33 +240,7 @@ bool SingleValFields::VisitMemberExpr( const MemberExpr* memberExpr )
}
else if (isa<CallExpr>(parent))
{
const CallExpr* callExpr = dyn_cast<CallExpr>(parent);
if (callExpr->getCallee() == child) {
break;
}
const FunctionDecl* functionDecl;
if (isa<CXXMemberCallExpr>(callExpr)) {
functionDecl = dyn_cast<CXXMemberCallExpr>(callExpr)->getMethodDecl();
}
else {
functionDecl = callExpr->getDirectCallee();
}
if (!functionDecl) {
break;
}
for (unsigned i = 0; i < callExpr->getNumArgs(); ++i) {
if (i >= functionDecl->getNumParams()) // can happen in template code
break;
if (callExpr->getArg(i) == child) {
const ParmVarDecl* parmVarDecl = functionDecl->getParamDecl(i);
QualType qt = parmVarDecl->getType().getDesugaredType(compiler.getASTContext());
if (!qt.isConstQualified() && qt->isReferenceType()) {
assignValue = "?";
bPotentiallyAssignedTo = true;
}
break;
}
}
checkCallExpr(child, dyn_cast<CallExpr>(parent), assignValue, bPotentiallyAssignedTo);
break;
}
else if (isa<CXXConstructExpr>(parent))
@@ -354,6 +329,62 @@ bool SingleValFields::isInterestingType(const QualType& qt) {
return qt.isCXX11PODType(compiler.getASTContext());
}
void SingleValFields::checkCallExpr(const Stmt* child, const CallExpr* callExpr, std::string& assignValue, bool& bPotentiallyAssignedTo)
{
if (callExpr->getCallee() == child) {
return;
}
const FunctionDecl* functionDecl;
if (isa<CXXMemberCallExpr>(callExpr)) {
functionDecl = dyn_cast<CXXMemberCallExpr>(callExpr)->getMethodDecl();
} else {
functionDecl = callExpr->getDirectCallee();
}
if (functionDecl) {
for (unsigned i = 0; i < callExpr->getNumArgs(); ++i) {
if (i >= functionDecl->getNumParams()) // can happen in template code
break;
if (callExpr->getArg(i) == child) {
const ParmVarDecl* parmVarDecl = functionDecl->getParamDecl(i);
QualType qt = parmVarDecl->getType().getDesugaredType(compiler.getASTContext());
if (!qt.isConstQualified() && qt->isReferenceType()) {
assignValue = "?";
bPotentiallyAssignedTo = true;
}
break;
}
}
return;
}
// check for function pointers
const FieldDecl* calleeFieldDecl = dyn_cast_or_null<FieldDecl>(callExpr->getCalleeDecl());
if (!calleeFieldDecl) {
return;
}
QualType qt = calleeFieldDecl->getType().getDesugaredType(compiler.getASTContext());
if (!qt->isPointerType()) {
return;
}
qt = qt->getPointeeType().getDesugaredType(compiler.getASTContext());
const FunctionProtoType* proto = qt->getAs<FunctionProtoType>();
if (!proto) {
return;
}
for (unsigned i = 0; i < callExpr->getNumArgs(); ++i) {
if (i >= proto->getNumParams()) // can happen in template code
break;
if (callExpr->getArg(i) == child) {
QualType qt = proto->getParamTypes()[i].getDesugaredType(compiler.getASTContext());
if (!qt.isConstQualified() && qt->isReferenceType()) {
assignValue = "?";
bPotentiallyAssignedTo = true;
}
break;
}
}
}
std::string SingleValFields::getExprValue(const Expr* arg)
{
if (!arg)