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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/Frontend/ASTUnit.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Index/CallGraph.h"
#include "clang/Index/Indexer.h"
#include "clang/Index/TranslationUnit.h"
#include "clang/Index/DeclReferenceMap.h"
#include "clang/Index/SelectorMap.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 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;
llvm::IntrusiveRefCntPtr<Diagnostic> Diags
= CompilerInstance::createDiagnostics(DiagOpts, argc, argv);
for (unsigned i = 0, e = InputFilenames.size(); i != e; ++i) {
const std::string &InFile = InputFilenames[i];
llvm::OwningPtr<ASTUnit> AST(ASTUnit::LoadFromPCHFile(InFile, Diags));
if (!AST)
return 1;
ASTUnits.push_back(AST.take());
}
if (ViewCallGraph) {
llvm::OwningPtr<CallGraph> CG;
CG.reset(new 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(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;
return 0;
}
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