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-rw-r--r--compilerplugins/clang/countusersofdefaultparams.cxx250
1 files changed, 250 insertions, 0 deletions
diff --git a/compilerplugins/clang/countusersofdefaultparams.cxx b/compilerplugins/clang/countusersofdefaultparams.cxx
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+++ b/compilerplugins/clang/countusersofdefaultparams.cxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <string>
+#include <set>
+#include <iostream>
+#include <fstream>
+
+#include "clang/AST/Attr.h"
+
+#include "config_clang.h"
+
+#include "plugin.hxx"
+
+/*
+ Count call sites that are actually using the defaulted values on params on methods that declare such.
+
+ The process goes something like this:
+ $ make check
+ $ make FORCE_COMPILE=all COMPILER_PLUGIN_TOOL='countusersofdefaultparams' check
+ $ ./compilerplugins/clang/countusersofdefaultparams.py
+*/
+
+namespace {
+
+struct MyFuncInfo
+{
+ std::string access;
+ std::string returnType;
+ std::string nameAndParams;
+ std::string sourceLocation;
+};
+bool operator < (const MyFuncInfo &lhs, const MyFuncInfo &rhs)
+{
+ return std::tie(lhs.returnType, lhs.nameAndParams)
+ < std::tie(rhs.returnType, rhs.nameAndParams);
+}
+struct MyCallInfo : public MyFuncInfo
+{
+ std::string sourceLocationOfCall;
+};
+bool operator < (const MyCallInfo &lhs, const MyCallInfo &rhs)
+{
+ return std::tie(lhs.returnType, lhs.nameAndParams, lhs.sourceLocationOfCall)
+ < std::tie(rhs.returnType, rhs.nameAndParams, rhs.sourceLocationOfCall);
+}
+
+
+// try to limit the voluminous output a little
+static std::set<MyCallInfo> callSet;
+static std::set<MyFuncInfo> definitionSet;
+
+class CountUsersOfDefaultParams:
+ public RecursiveASTVisitor<CountUsersOfDefaultParams>, public loplugin::Plugin
+{
+public:
+ explicit CountUsersOfDefaultParams(loplugin::InstantiationData const & data): Plugin(data) {}
+
+ virtual void run() override
+ {
+ TraverseDecl(compiler.getASTContext().getTranslationUnitDecl());
+
+ // dump all our output in one write call - this is to try and limit IO "crosstalk" between multiple processes
+ // writing to the same logfile
+
+ std::string output;
+ for (const MyFuncInfo & s : definitionSet)
+ output += "defn:\t" + s.access + "\t" + s.returnType + "\t" + s.nameAndParams + "\t" + s.sourceLocation + "\n";
+ for (const MyCallInfo & s : callSet)
+ output += "call:\t" + s.returnType + "\t" + s.nameAndParams + "\t" + s.sourceLocationOfCall + "\n";
+ std::ofstream myfile;
+ myfile.open( WORKDIR "/loplugin.countusersofdefaultparams.log", std::ios::app | std::ios::out);
+ myfile << output;
+ myfile.close();
+ }
+
+ bool shouldVisitTemplateInstantiations () const { return true; }
+
+ bool VisitCallExpr( const CallExpr * );
+ bool VisitFunctionDecl( const FunctionDecl* );
+ bool VisitCXXConstructExpr( const CXXConstructExpr * );
+private:
+ void niceName(const FunctionDecl* functionDecl, MyFuncInfo&);
+ std::string locationToString(const SourceLocation&);
+};
+
+void CountUsersOfDefaultParams::niceName(const FunctionDecl* functionDecl, MyFuncInfo& aInfo)
+{
+ if (functionDecl->getInstantiatedFromMemberFunction())
+ functionDecl = functionDecl->getInstantiatedFromMemberFunction();
+ else if (functionDecl->getTemplateInstantiationPattern())
+ functionDecl = functionDecl->getTemplateInstantiationPattern();
+
+ switch (functionDecl->getAccess())
+ {
+ case AS_public: aInfo.access = "public"; break;
+ case AS_private: aInfo.access = "private"; break;
+ case AS_protected: aInfo.access = "protected"; break;
+ default: aInfo.access = "unknown"; break;
+ }
+ aInfo.returnType = functionDecl->getReturnType().getCanonicalType().getAsString();
+
+ if (isa<CXXMethodDecl>(functionDecl)) {
+ const CXXRecordDecl* recordDecl = dyn_cast<CXXMethodDecl>(functionDecl)->getParent();
+ aInfo.nameAndParams += recordDecl->getQualifiedNameAsString();
+ aInfo.nameAndParams += "::";
+ }
+ aInfo.nameAndParams += functionDecl->getNameAsString() + "(";
+ bool bFirst = true;
+ for (const ParmVarDecl *pParmVarDecl : functionDecl->parameters()) {
+ if (bFirst)
+ bFirst = false;
+ else
+ aInfo.nameAndParams += ",";
+ aInfo.nameAndParams += pParmVarDecl->getType().getCanonicalType().getAsString();
+ }
+ aInfo.nameAndParams += ")";
+ if (isa<CXXMethodDecl>(functionDecl) && dyn_cast<CXXMethodDecl>(functionDecl)->isConst()) {
+ aInfo.nameAndParams += " const";
+ }
+
+ aInfo.sourceLocation = locationToString(functionDecl->getLocation());
+ loplugin::normalizeDotDotInFilePath(aInfo.sourceLocation);
+}
+
+bool CountUsersOfDefaultParams::VisitCallExpr(const CallExpr * callExpr) {
+ if (ignoreLocation(callExpr)) {
+ return true;
+ }
+ const FunctionDecl* functionDecl;
+ if (isa<CXXMemberCallExpr>(callExpr)) {
+ functionDecl = dyn_cast<CXXMemberCallExpr>(callExpr)->getMethodDecl();
+ }
+ else {
+ functionDecl = callExpr->getDirectCallee();
+ }
+ if (functionDecl == nullptr) {
+ return true;
+ }
+ functionDecl = functionDecl->getCanonicalDecl();
+ // work our way up to the root method
+ while (isa<CXXMethodDecl>(functionDecl)) {
+ const CXXMethodDecl* methodDecl = dyn_cast<CXXMethodDecl>(functionDecl);
+ if (methodDecl->size_overridden_methods()==0)
+ break;
+ functionDecl = *methodDecl->begin_overridden_methods();
+ }
+ // work our way back to the root definition for template methods
+ if (functionDecl->getInstantiatedFromMemberFunction())
+ functionDecl = functionDecl->getInstantiatedFromMemberFunction();
+ else if (functionDecl->getTemplateInstantiationPattern())
+ functionDecl = functionDecl->getTemplateInstantiationPattern();
+ int n = functionDecl->getNumParams() - 1;
+ if (n < 0 || !functionDecl->getParamDecl(n)->hasDefaultArg()) {
+ return true;
+ }
+ while (n > 0 && functionDecl->getParamDecl(n-1)->hasDefaultArg()) {
+ --n;
+ }
+ // look for callsites that are actually using the defaulted values
+ if ( n < (int)callExpr->getNumArgs() && callExpr->getArg(n)->isDefaultArgument()) {
+ MyCallInfo callInfo;
+ niceName(functionDecl, callInfo);
+ callInfo.sourceLocationOfCall = locationToString(callExpr->getBeginLoc());
+ callSet.insert(callInfo);
+ }
+ return true;
+}
+
+bool CountUsersOfDefaultParams::VisitCXXConstructExpr(const CXXConstructExpr * constructExpr) {
+ if (ignoreLocation(constructExpr)) {
+ return true;
+ }
+ const CXXConstructorDecl* constructorDecl = constructExpr->getConstructor()->getCanonicalDecl();
+ // work our way back to the root definition for template methods
+ if (constructorDecl->getInstantiatedFromMemberFunction())
+ constructorDecl = dyn_cast<CXXConstructorDecl>(constructorDecl->getInstantiatedFromMemberFunction());
+ else if (constructorDecl->getTemplateInstantiationPattern())
+ constructorDecl = dyn_cast<CXXConstructorDecl>(constructorDecl->getTemplateInstantiationPattern());
+ int n = constructorDecl->getNumParams() - 1;
+ if (n < 0 || !constructorDecl->getParamDecl(n)->hasDefaultArg()) {
+ return true;
+ }
+ while (n > 0 && constructorDecl->getParamDecl(n-1)->hasDefaultArg()) {
+ --n;
+ }
+ // look for callsites that are actually using the defaulted values
+ if ( n < (int)constructExpr->getNumArgs() && constructExpr->getArg(n)->isDefaultArgument()) {
+ MyCallInfo callInfo;
+ niceName(constructorDecl, callInfo);
+ callInfo.sourceLocationOfCall = locationToString(constructExpr->getBeginLoc());
+ callSet.insert(callInfo);
+ }
+ return true;
+}
+
+std::string CountUsersOfDefaultParams::locationToString(const SourceLocation& sourceLoc)
+{
+ SourceLocation expansionLoc = compiler.getSourceManager().getExpansionLoc( sourceLoc );
+ StringRef name = getFilenameOfLocation(expansionLoc);
+ return std::string(name.substr(strlen(SRCDIR)+1)) + ":" + std::to_string(compiler.getSourceManager().getSpellingLineNumber(expansionLoc));
+}
+
+bool CountUsersOfDefaultParams::VisitFunctionDecl( const FunctionDecl* functionDecl )
+{
+ functionDecl = functionDecl->getCanonicalDecl();
+ if( !functionDecl || !functionDecl->getLocation().isValid() || ignoreLocation( functionDecl )) {
+ return true;
+ }
+ const CXXMethodDecl* methodDecl = dyn_cast_or_null<CXXMethodDecl>(functionDecl);
+
+ // ignore method overrides, since the call will show up as being directed to the root method
+ if (methodDecl && (methodDecl->size_overridden_methods() != 0 || methodDecl->hasAttr<OverrideAttr>())) {
+ return true;
+ }
+ // ignore stuff that forms part of the stable URE interface
+ if (isInUnoIncludeFile(functionDecl)) {
+ return true;
+ }
+ if (isa<CXXDestructorDecl>(functionDecl)) {
+ return true;
+ }
+ if (functionDecl->isDeleted()) {
+ return true;
+ }
+ auto n = functionDecl->getNumParams();
+ if (n == 0 || !functionDecl->getParamDecl(n - 1)->hasDefaultArg()) {
+ return true;
+ }
+
+ if( functionDecl->getLocation().isValid() )
+ {
+ MyFuncInfo funcInfo;
+ niceName(functionDecl, funcInfo);
+ definitionSet.insert(funcInfo);
+ }
+ return true;
+}
+
+loplugin::Plugin::Registration< CountUsersOfDefaultParams > X("countusersofdefaultparams", false);
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */