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//===--- ASTStreamers.cpp - ASTStreamer Drivers ---------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Bill Wendling and is distributed under the
// University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// ASTStreamer drivers.
//
//===----------------------------------------------------------------------===//
#include "ASTStreamers.h"
#include "clang/AST/AST.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/AST/CFG.h"
#include "clang/Analysis/LiveVariables.h"
#include "clang/Analysis/LocalCheckers.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Sema/ASTStreamer.h"
using namespace clang;
static void PrintFunctionDeclStart(FunctionDecl *FD) {
bool HasBody = FD->getBody();
fprintf(stderr, "\n");
switch (FD->getStorageClass()) {
default: assert(0 && "Unknown storage class");
case FunctionDecl::None: break;
case FunctionDecl::Extern: fprintf(stderr, "extern "); break;
case FunctionDecl::Static: fprintf(stderr, "static "); break;
}
if (FD->isInline())
fprintf(stderr, "inline ");
std::string Proto = FD->getName();
FunctionType *AFT = cast<FunctionType>(FD->getType());
if (FunctionTypeProto *FT = dyn_cast<FunctionTypeProto>(AFT)) {
Proto += "(";
for (unsigned i = 0, e = FD->getNumParams(); i != e; ++i) {
if (i) Proto += ", ";
std::string ParamStr;
if (HasBody) ParamStr = FD->getParamDecl(i)->getName();
FT->getArgType(i).getAsStringInternal(ParamStr);
Proto += ParamStr;
}
if (FT->isVariadic()) {
if (FD->getNumParams()) Proto += ", ";
Proto += "...";
}
Proto += ")";
} else {
assert(isa<FunctionTypeNoProto>(AFT));
Proto += "()";
}
AFT->getResultType().getAsStringInternal(Proto);
fprintf(stderr, "%s", Proto.c_str());
if (!FD->getBody())
fprintf(stderr, ";\n");
// Doesn't print the body.
}
static void PrintTypeDefDecl(TypedefDecl *TD) {
std::string S = TD->getName();
TD->getUnderlyingType().getAsStringInternal(S);
fprintf(stderr, "typedef %s;\n", S.c_str());
}
static void PrintObjcInterfaceDecl(ObjcInterfaceDecl *OID) {
std::string S = OID->getName();
fprintf(stderr, "@interface %s;\n", S.c_str());
// FIXME: implement the rest...
}
namespace {
class ASTPrinter : public ASTConsumer {
virtual void HandleTopLevelDecl(Decl *D) {
if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
PrintFunctionDeclStart(FD);
if (FD->getBody()) {
fprintf(stderr, " ");
FD->getBody()->dumpPretty();
fprintf(stderr, "\n");
}
} else if (TypedefDecl *TD = dyn_cast<TypedefDecl>(D)) {
PrintTypeDefDecl(TD);
} else if (ObjcInterfaceDecl *OID = dyn_cast<ObjcInterfaceDecl>(D)) {
PrintObjcInterfaceDecl(OID);
} else if (ScopedDecl *SD = dyn_cast<ScopedDecl>(D)) {
fprintf(stderr, "Read top-level variable decl: '%s'\n", SD->getName());
}
}
};
}
ASTConsumer *clang::CreateASTPrinter() { return new ASTPrinter(); }
namespace {
class ASTDumper : public ASTConsumer {
SourceManager *SM;
public:
void Initialize(ASTContext &Context, unsigned MainFileID) {
SM = &Context.SourceMgr;
}
virtual void HandleTopLevelDecl(Decl *D) {
if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
PrintFunctionDeclStart(FD);
if (FD->getBody()) {
fprintf(stderr, "\n");
FD->getBody()->dumpAll(*SM);
fprintf(stderr, "\n");
}
} else if (TypedefDecl *TD = dyn_cast<TypedefDecl>(D)) {
PrintTypeDefDecl(TD);
} else if (ScopedDecl *SD = dyn_cast<ScopedDecl>(D)) {
fprintf(stderr, "Read top-level variable decl: '%s'\n", SD->getName());
}
}
};
}
ASTConsumer *clang::CreateASTDumper() { return new ASTDumper(); }
//===----------------------------------------------------------------------===//
// CFGVisitor & VisitCFGs - Boilerplate interface and logic to visit
// the CFGs for all function definitions.
namespace {
class CFGVisitor {
public:
virtual ~CFGVisitor() {}
virtual void VisitCFG(CFG& C) = 0;
virtual bool printFuncDeclStart() { return true; }
};
} // end anonymous namespace
static void VisitCFGs(CFGVisitor& Visitor, Preprocessor& PP,
unsigned MainFileID, bool Stats) {
bool printFDecl = Visitor.printFuncDeclStart();
ASTContext Context(PP.getSourceManager(), PP.getTargetInfo(),
PP.getIdentifierTable());
ASTStreamerTy *Streamer = ASTStreamer_Init(PP, Context, MainFileID);
while (Decl *D = ASTStreamer_ReadTopLevelDecl(Streamer)) {
if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D))
if (FD->getBody()) {
if (printFDecl) {
PrintFunctionDeclStart(FD);
fprintf(stderr,"\n");
}
if (CFG* C = CFG::buildCFG(FD->getBody())) {
Visitor.VisitCFG(*C);
delete C;
}
else
fprintf(stderr," Error processing CFG.\n");
}
}
if (Stats) {
fprintf(stderr, "\nSTATISTICS:\n");
ASTStreamer_PrintStats(Streamer);
Context.PrintStats();
}
ASTStreamer_Terminate(Streamer);
}
//===----------------------------------------------------------------------===//
// DumpCFGs - Dump CFGs to stderr or visualize with Graphviz
namespace {
class CFGDumper : public CFGVisitor {
const bool UseGraphviz;
public:
CFGDumper(bool use_graphviz) : UseGraphviz(use_graphviz) {}
virtual void VisitCFG(CFG& C) {
if (UseGraphviz) C.viewCFG();
else C.dump();
}
};
} // end anonymous namespace
void clang::DumpCFGs(Preprocessor &PP, unsigned MainFileID,
bool Stats, bool use_graphviz) {
CFGDumper Visitor(use_graphviz);
VisitCFGs(Visitor,PP,MainFileID,Stats);
}
//===----------------------------------------------------------------------===//
// AnalyzeLiveVariables - perform live variable analysis and dump results
namespace {
class LivenessVisitor : public CFGVisitor {
Preprocessor& PP;
public:
LivenessVisitor(Preprocessor& pp) : PP(pp) {}
virtual void VisitCFG(CFG& C) {
LiveVariables L;
L.runOnCFG(C);
L.dumpBlockLiveness(PP.getSourceManager());
L.dumpVarLiveness(PP.getSourceManager());
}
};
} // end anonymous namespace
void clang::AnalyzeLiveVariables(Preprocessor &PP, unsigned MainFileID) {
LivenessVisitor Visitor(PP);
VisitCFGs(Visitor,PP,MainFileID,false);
}
//===----------------------------------------------------------------------===//
// RunDeadStores - run checker to locate dead stores in a function
namespace {
class DeadStoreVisitor : public CFGVisitor {
Preprocessor& PP;
public:
DeadStoreVisitor(Preprocessor& pp) : PP(pp) {}
virtual void VisitCFG(CFG& C) { CheckDeadStores(C,PP); }
virtual bool printFuncDeclStart() { return false; }
};
} // end anonymous namespace
void clang::RunDeadStoresCheck(Preprocessor &PP,unsigned MainFileID,bool Stats){
DeadStoreVisitor Visitor(PP);
VisitCFGs(Visitor,PP,MainFileID,Stats);
}
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