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/*first line intentionally left blank.*/
/*************************************************************************************************/
//-*-c++-*-
/*Copyright (C) 2018 Farzad Sadeghi
* Licensed under GPL-3.0
* */
/*************************************************************************************************/
/*included modules*/
/*project headers*/
/*standard headers*/
#include <cassert>
#include <cstdlib>
#include <dirent.h>
#include <fstream>
#include <iostream>
#include <regex>
#include <string>
#include <vector>
/*LLVM headers*/
#include "clang/AST/AST.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/ASTMatchers/ASTMatchers.h"
#include "clang/Basic/LLVM.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/FrontendActions.h"
#include "clang/Lex/Lexer.h"
#include "clang/Rewrite/Core/Rewriter.h"
#include "clang/Tooling/CommonOptionsParser.h"
#include "clang/Tooling/Tooling.h"
#include "llvm/Support/raw_ostream.h"
/*************************************************************************************************/
/*used namespaces*/
using namespace llvm;
using namespace clang;
using namespace clang::ast_matchers;
using namespace clang::driver;
using namespace clang::tooling;
/*************************************************************************************************/
namespace {
static llvm::cl::OptionCategory CGrepCat("cgrep options");
cl::opt<std::string> CO_DIRECTORY("dir", cl::desc(""), cl::init(""), cl::cat(CGrepCat), cl::Optional);
cl::opt<std::string> CO_REGEX("regex", cl::desc(""), cl::init(""), cl::cat(CGrepCat), cl::Optional);
cl::opt<bool> CO_FUNCTION("func", cl::desc(""), cl::init(false), cl::cat(CGrepCat), cl::Optional);
cl::opt<bool> CO_MEM_FUNCTION("memfunc", cl::desc(""), cl::init(false), cl::cat(CGrepCat), cl::Optional);
cl::opt<bool> CO_VAR("var", cl::desc(""), cl::init(false), cl::cat(CGrepCat), cl::Optional);
cl::opt<bool> CO_MEMVAR("memvar", cl::desc(""), cl::init(false), cl::cat(CGrepCat), cl::Optional);
cl::opt<bool> CO_CLASS("class", cl::desc(""), cl::init(false), cl::cat(CGrepCat), cl::Optional);
}
/*************************************************************************************************/
std::string regex_preprocessor(std::string rx_str) {
std::string ret_rx_str;
return ret_rx_str;
}
void regex_handlaer(std::string rx_str) {
std::regex regex(regex_preprocessor(rx_str));
return void();
}
/*************************************************************************************************/
class CalledFunc : public MatchFinder::MatchCallback {
public:
CalledFunc(Rewriter &Rewrite) : Rewrite(Rewrite) {}
virtual void run(const MatchFinder::MatchResult &MR) {
const FunctionDecl *FD = MR.Nodes.getNodeAs<clang::FunctionDecl>("funcdecl");
if (FD) {
SourceRange SR = FD->getSourceRange();
std::string name = FD->getNameAsString();
}
}
private:
Rewriter &Rewrite [[maybe_unused]];
};
/*************************************************************************************************/
class CalledVar : public MatchFinder::MatchCallback {
public:
CalledVar(Rewriter &Rewrite) : Rewrite(Rewrite) {}
virtual void run(const MatchFinder::MatchResult &MR) {
const VarDecl *VD = MR.Nodes.getNodeAs<clang::VarDecl>("vardecl");
if (VD) {
SourceRange SR = VD->getSourceRange();
std::string name = VD->getNameAsString();
}
}
private:
Rewriter &Rewrite [[maybe_unused]];
};
/*************************************************************************************************/
class FuncDecl : public MatchFinder::MatchCallback {
public:
FuncDecl(Rewriter &Rewrite) : Rewrite(Rewrite) {}
virtual void run(const MatchFinder::MatchResult &MR) {}
private:
Rewriter &Rewrite [[maybe_unused]];
};
/*************************************************************************************************/
class VDecl : public MatchFinder::MatchCallback {
public:
VDecl(Rewriter &Rewrite) : Rewrite(Rewrite) {}
virtual void run(const MatchFinder::MatchResult &MR) {}
private:
Rewriter &Rewrite [[maybe_unused]];
};
/*************************************************************************************************/
class ClassDecl : public MatchFinder::MatchCallback {
public:
ClassDecl(Rewriter &Rewrite) : Rewrite(Rewrite) {}
virtual void run(const MatchFinder::MatchResult &MR) {}
private:
Rewriter &Rewrite [[maybe_unused]];
};
/*************************************************************************************************/
class PPInclusion : public PPCallbacks {
public:
explicit PPInclusion(SourceManager *SM, Rewriter *Rewrite)
: SM(*SM), Rewrite(*Rewrite) {}
virtual void MacroDefined(const Token &MacroNameTok,
const MacroDirective *MD) {}
virtual void MacroExpands(const Token &MacroNameTok,
const MacroDefinition &MD, SourceRange Range,
const MacroArgs *Args) {}
#if __clang_major__ <= 6
virtual void InclusionDirective(SourceLocation HashLoc,
const Token &IncludeTok, StringRef FileName,
bool IsAngled, CharSourceRange FilenameRange,
const FileEntry *File, StringRef SearchPath,
StringRef RelativePath,
const clang::Module *Imported) {
#elif __clang_major__ >= 8
virtual void InclusionDirective(SourceLocation HashLoc,
const Token &IncludeTok, StringRef FileName,
bool IsAngled, CharSourceRange FilenameRange,
const FileEntry *File, StringRef SearchPath,
StringRef RelativePath,
const clang::Module *Imported,
SrcMgr::CharacteristicKind FileType) {
#endif
}
private:
const SourceManager &SM [[maybe_unused]];
Rewriter &Rewrite [[maybe_unused]];
};
/*************************************************************************************************/
// brief A Clang Diagnostic Consumer that does nothing.
class BlankDiagConsumer : public clang::DiagnosticConsumer {
public:
BlankDiagConsumer() = default;
virtual ~BlankDiagConsumer() {}
virtual void HandleDiagnostic(DiagnosticsEngine::Level DiagLevel,
const Diagnostic &Info) override {}
};
/*************************************************************************************************/
class MyASTConsumer : public ASTConsumer {
public:
MyASTConsumer(Rewriter &R)
: funcDeclHandler(R), HandlerForVar(R), HandlerForClass(R),
HandlerForCalledFunc(R), HandlerForCalledVar(R) {
#if 1
Matcher.addMatcher(functionDecl().bind("funcdecl"), &funcDeclHandler);
Matcher.addMatcher(
varDecl(anyOf(unless(hasDescendant(expr(anything()))),
hasDescendant(expr(anything()).bind("expr"))))
.bind("vardecl"),
&HandlerForVar);
Matcher.addMatcher(recordDecl(isClass()).bind("classdecl"),
&HandlerForClass);
Matcher.addMatcher(declRefExpr().bind("calledvar"), &HandlerForCalledVar);
#endif
}
void HandleTranslationUnit(ASTContext &Context) override {
Matcher.matchAST(Context);
}
private:
FuncDecl funcDeclHandler;
VDecl HandlerForVar;
ClassDecl HandlerForClass;
CalledFunc HandlerForCalledFunc;
CalledVar HandlerForCalledVar;
MatchFinder Matcher;
};
/*************************************************************************************************/
class AppFrontendAction : public ASTFrontendAction {
public:
AppFrontendAction() {}
~AppFrontendAction() { delete BDCProto; }
void EndSourceFileAction() override {
std::error_code EC;
TheRewriter.getEditBuffer(TheRewriter.getSourceMgr().getMainFileID())
.write(llvm::outs());
}
std::unique_ptr<ASTConsumer> CreateASTConsumer(CompilerInstance &CI,
StringRef file) override {
CI.getPreprocessor().addPPCallbacks(
llvm::make_unique<PPInclusion>(&CI.getSourceManager(), &TheRewriter));
DiagnosticsEngine &DE = CI.getPreprocessor().getDiagnostics();
DE.setClient(BDCProto, false);
TheRewriter.setSourceMgr(CI.getSourceManager(), CI.getLangOpts());
return llvm::make_unique<MyASTConsumer>(TheRewriter);
}
private:
BlankDiagConsumer *BDCProto = new BlankDiagConsumer;
Rewriter TheRewriter;
};
/*************************************************************************************************/
/*************************************************************************************************/
/*Main*/
int main(int argc, const char **argv) {
CommonOptionsParser op(argc, argv, CGrepCat);
const std::vector<std::string> &SourcePathList [[maybe_unused]] = op.getSourcePathList();
ClangTool Tool(op.getCompilations(), op.getSourcePathList());
int ret = Tool.run(newFrontendActionFactory<AppFrontendAction>().get());
return ret;
}
/*************************************************************************************************/
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