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//===--- clang-wpa.cpp - clang whole program analyzer ---------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This tool reads a sequence of precompiled AST files, and do various
// cross translation unit analyses.
//
//===----------------------------------------------------------------------===//
#include "clang/Basic/FileManager.h"
#include "clang/Basic/SourceManager.h"
#include "clang/StaticAnalyzer/Frontend/CheckerRegistration.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/AnalysisManager.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/TransferFuncs.h"
#include "clang/StaticAnalyzer/Core/CheckerManager.h"
#include "clang/StaticAnalyzer/Checkers/LocalCheckers.h"
#include "clang/Frontend/ASTUnit.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Index/GlobalCallGraph.h"
#include "clang/Index/Indexer.h"
#include "clang/Index/TranslationUnit.h"
#include "clang/Index/DeclReferenceMap.h"
#include "clang/Index/SelectorMap.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Basic/TargetInfo.h"
#include "llvm/ADT/IntrusiveRefCntPtr.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/raw_ostream.h"
using namespace clang;
using namespace idx;
static llvm::cl::list<std::string>
InputFilenames(llvm::cl::Positional, llvm::cl::desc("<input AST files>"));
static llvm::cl::opt<bool>
ViewCallGraph("view-call-graph", llvm::cl::desc("Display the call graph."));
static llvm::cl::opt<std::string>
AnalyzeFunction("analyze-function",
llvm::cl::desc("Specify the entry function."));
namespace {
// A thin wrapper over ASTUnit implementing the TranslationUnit interface.
class ASTUnitTU : public TranslationUnit {
ASTUnit *AST;
DeclReferenceMap DeclRefMap;
SelectorMap SelMap;
public:
ASTUnitTU(ASTUnit *ast)
: AST(ast), DeclRefMap(AST->getASTContext()), SelMap(AST->getASTContext()) {
}
virtual ASTContext &getASTContext() {
return AST->getASTContext();
}
virtual Preprocessor &getPreprocessor() {
return AST->getPreprocessor();
}
virtual Diagnostic &getDiagnostic() {
return AST->getDiagnostics();
}
virtual DeclReferenceMap &getDeclReferenceMap() {
return DeclRefMap;
}
virtual SelectorMap &getSelectorMap() {
return SelMap;
}
};
}
int main(int argc, char **argv) {
llvm::cl::ParseCommandLineOptions(argc, argv, "clang-wpa");
std::vector<ASTUnit*> ASTUnits;
Program Prog;
Indexer Idxer(Prog);
if (InputFilenames.empty())
return 0;
DiagnosticOptions DiagOpts;
IntrusiveRefCntPtr<Diagnostic> Diags
= CompilerInstance::createDiagnostics(DiagOpts, argc, argv);
for (unsigned i = 0, e = InputFilenames.size(); i != e; ++i) {
const std::string &InFile = InputFilenames[i];
OwningPtr<ASTUnit> AST(ASTUnit::LoadFromASTFile(InFile, Diags,
FileSystemOptions(),
false, 0, 0, true));
if (!AST)
return 1;
ASTUnits.push_back(AST.take());
}
if (ViewCallGraph) {
OwningPtr<clang::idx::CallGraph> CG;
CG.reset(new clang::idx::CallGraph(Prog));
for (unsigned i = 0, e = ASTUnits.size(); i != e; ++i)
CG->addTU(ASTUnits[i]->getASTContext());
CG->ViewCallGraph();
return 0;
}
if (AnalyzeFunction.empty())
return 0;
// Feed all ASTUnits to the Indexer.
for (unsigned i = 0, e = ASTUnits.size(); i != e; ++i) {
ASTUnitTU *TU = new ASTUnitTU(ASTUnits[i]);
Idxer.IndexAST(TU);
}
Entity Ent = Entity::get(AnalyzeFunction, Prog);
FunctionDecl *FD;
TranslationUnit *TU;
llvm::tie(FD, TU) = Idxer.getDefinitionFor(Ent);
if (!FD)
return 0;
// Create an analysis engine.
Preprocessor &PP = TU->getPreprocessor();
AnalyzerOptions Opts;
// Hard code options and checkers for now.
Opts.MaxNodes = 300000;
Opts.MaxLoop = 3;
Opts.InlineCall = true;
Opts.CFGAddImplicitDtors = true;
Opts.EagerlyTrimEGraph = true;
Opts.CheckersControlList.push_back(std::make_pair("core", true));
if (PP.getTargetInfo().getTriple().getOS() != llvm::Triple::Win32)
Opts.CheckersControlList.push_back(std::make_pair("unix", true));
if (PP.getTargetInfo().getTriple().getVendor() == llvm::Triple::Apple)
Opts.CheckersControlList.push_back(std::make_pair("macosx", true));
// Checks to perform for Objective-C/Objective-C++.
if (PP.getLangOpts().ObjC1)
Opts.CheckersControlList.push_back(std::make_pair("cocoa", true));
OwningPtr<ento::CheckerManager> checkerMgr;
checkerMgr.reset(ento::registerCheckers(Opts, PP.getLangOpts(),
PP.getDiagnostics()));
using namespace clang::ento;
AnalysisManager AMgr(TU->getASTContext(), PP.getDiagnostics(),
PP.getLangOpts(), /* PathDiagnostic */ 0,
CreateRegionStoreManager,
CreateRangeConstraintManager, checkerMgr.get(), &Idxer,
Opts.MaxNodes, Opts.MaxLoop,
Opts.VisualizeEGDot, Opts.VisualizeEGUbi,
Opts.PurgeDead, Opts.EagerlyAssume,
Opts.TrimGraph, Opts.InlineCall,
Opts.UnoptimizedCFG, Opts.CFGAddImplicitDtors,
Opts.CFGAddInitializers,
Opts.EagerlyTrimEGraph);
TransferFuncs* TF = MakeCFRefCountTF(AMgr.getASTContext(), /*GC*/false,
AMgr.getLangOpts());
ExprEngine Eng(AMgr, TF);
Eng.ExecuteWorkList(AMgr.getStackFrame(FD, TU), AMgr.getMaxNodes());
return 0;
}
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