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//==- ProgramPoint.cpp - Program Points for Path-Sensitive Analysis -*- C++ -*-/
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file defines the interface ProgramPoint, which identifies a
// distinct location in a function.
//
//===----------------------------------------------------------------------===//
#include "clang/Analysis/ProgramPoint.h"
#include "clang/AST/ASTContext.h"
#include "clang/Basic/JsonSupport.h"
using namespace clang;
ProgramPointTag::~ProgramPointTag() {}
ProgramPoint ProgramPoint::getProgramPoint(const Stmt *S, ProgramPoint::Kind K,
const LocationContext *LC,
const ProgramPointTag *tag){
switch (K) {
default:
llvm_unreachable("Unhandled ProgramPoint kind");
case ProgramPoint::PreStmtKind:
return PreStmt(S, LC, tag);
case ProgramPoint::PostStmtKind:
return PostStmt(S, LC, tag);
case ProgramPoint::PreLoadKind:
return PreLoad(S, LC, tag);
case ProgramPoint::PostLoadKind:
return PostLoad(S, LC, tag);
case ProgramPoint::PreStoreKind:
return PreStore(S, LC, tag);
case ProgramPoint::PostLValueKind:
return PostLValue(S, LC, tag);
case ProgramPoint::PostStmtPurgeDeadSymbolsKind:
return PostStmtPurgeDeadSymbols(S, LC, tag);
case ProgramPoint::PreStmtPurgeDeadSymbolsKind:
return PreStmtPurgeDeadSymbols(S, LC, tag);
}
}
LLVM_DUMP_METHOD void ProgramPoint::dump() const {
return printJson(llvm::errs());
}
void ProgramPoint::printJson(llvm::raw_ostream &Out, const char *NL) const {
const ASTContext &Context =
getLocationContext()->getAnalysisDeclContext()->getASTContext();
const SourceManager &SM = Context.getSourceManager();
const PrintingPolicy &PP = Context.getPrintingPolicy();
const bool AddQuotes = true;
Out << "\"kind\": \"";
switch (getKind()) {
case ProgramPoint::BlockEntranceKind:
Out << "BlockEntrance\""
<< ", \"block_id\": "
<< castAs<BlockEntrance>().getBlock()->getBlockID();
break;
case ProgramPoint::FunctionExitKind: {
auto FEP = getAs<FunctionExitPoint>();
Out << "FunctionExit\""
<< ", \"block_id\": " << FEP->getBlock()->getBlockID()
<< ", \"stmt_id\": ";
if (const ReturnStmt *RS = FEP->getStmt()) {
Out << RS->getID(Context) << ", \"stmt\": ";
RS->printJson(Out, nullptr, PP, AddQuotes);
} else {
Out << "null, \"stmt\": null";
}
break;
}
case ProgramPoint::BlockExitKind:
llvm_unreachable("BlockExitKind");
break;
case ProgramPoint::CallEnterKind:
Out << "CallEnter\"";
break;
case ProgramPoint::CallExitBeginKind:
Out << "CallExitBegin\"";
break;
case ProgramPoint::CallExitEndKind:
Out << "CallExitEnd\"";
break;
case ProgramPoint::EpsilonKind:
Out << "EpsilonPoint\"";
break;
case ProgramPoint::LoopExitKind:
Out << "LoopExit\", \"stmt\": \""
<< castAs<LoopExit>().getLoopStmt()->getStmtClassName() << '\"';
break;
case ProgramPoint::PreImplicitCallKind: {
ImplicitCallPoint PC = castAs<ImplicitCallPoint>();
Out << "PreCall\", \"decl\": \""
<< PC.getDecl()->getAsFunction()->getQualifiedNameAsString()
<< "\", \"location\": ";
printSourceLocationAsJson(Out, PC.getLocation(), SM);
break;
}
case ProgramPoint::PostImplicitCallKind: {
ImplicitCallPoint PC = castAs<ImplicitCallPoint>();
Out << "PostCall\", \"decl\": \""
<< PC.getDecl()->getAsFunction()->getQualifiedNameAsString()
<< "\", \"location\": ";
printSourceLocationAsJson(Out, PC.getLocation(), SM);
break;
}
case ProgramPoint::PostInitializerKind: {
Out << "PostInitializer\", ";
const CXXCtorInitializer *Init = castAs<PostInitializer>().getInitializer();
if (const FieldDecl *FD = Init->getAnyMember()) {
Out << "\"field_decl\": \"" << *FD << '\"';
} else {
Out << "\"type\": \"";
QualType Ty = Init->getTypeSourceInfo()->getType();
Ty = Ty.getLocalUnqualifiedType();
Ty.print(Out, Context.getLangOpts());
Out << '\"';
}
break;
}
case ProgramPoint::BlockEdgeKind: {
const BlockEdge &E = castAs<BlockEdge>();
const Stmt *T = E.getSrc()->getTerminatorStmt();
Out << "Edge\", \"src_id\": " << E.getSrc()->getBlockID()
<< ", \"dst_id\": " << E.getDst()->getBlockID() << ", \"terminator\": ";
if (!T) {
Out << "null, \"term_kind\": null";
break;
}
E.getSrc()->printTerminatorJson(Out, Context.getLangOpts(),
/*AddQuotes=*/true);
Out << ", \"location\": ";
printSourceLocationAsJson(Out, T->getBeginLoc(), SM);
Out << ", \"term_kind\": \"";
if (isa<SwitchStmt>(T)) {
Out << "SwitchStmt\", \"case\": ";
if (const Stmt *Label = E.getDst()->getLabel()) {
if (const auto *C = dyn_cast<CaseStmt>(Label)) {
Out << "{ \"lhs\": ";
if (const Stmt *LHS = C->getLHS()) {
LHS->printJson(Out, nullptr, PP, AddQuotes);
} else {
Out << "null";
}
Out << ", \"rhs\": ";
if (const Stmt *RHS = C->getRHS()) {
RHS->printJson(Out, nullptr, PP, AddQuotes);
} else {
Out << "null";
}
Out << " }";
} else {
assert(isa<DefaultStmt>(Label));
Out << "\"default\"";
}
} else {
Out << "\"implicit default\"";
}
} else if (isa<IndirectGotoStmt>(T)) {
// FIXME: More info.
Out << "IndirectGotoStmt\"";
} else {
Out << "Condition\", \"value\": "
<< (*E.getSrc()->succ_begin() == E.getDst() ? "true" : "false");
}
break;
}
default: {
const Stmt *S = castAs<StmtPoint>().getStmt();
assert(S != nullptr && "Expecting non-null Stmt");
Out << "Statement\", \"stmt_kind\": \"" << S->getStmtClassName()
<< "\", \"stmt_id\": " << S->getID(Context)
<< ", \"pointer\": \"" << (const void *)S << "\", ";
if (const auto *CS = dyn_cast<CastExpr>(S))
Out << "\"cast_kind\": \"" << CS->getCastKindName() << "\", ";
Out << "\"pretty\": ";
S->printJson(Out, nullptr, PP, AddQuotes);
Out << ", \"location\": ";
printSourceLocationAsJson(Out, S->getBeginLoc(), SM);
Out << ", \"stmt_point_kind\": \"";
if (getAs<PreLoad>())
Out << "PreLoad";
else if (getAs<PreStore>())
Out << "PreStore";
else if (getAs<PostAllocatorCall>())
Out << "PostAllocatorCall";
else if (getAs<PostCondition>())
Out << "PostCondition";
else if (getAs<PostLoad>())
Out << "PostLoad";
else if (getAs<PostLValue>())
Out << "PostLValue";
else if (getAs<PostStore>())
Out << "PostStore";
else if (getAs<PostStmt>())
Out << "PostStmt";
else if (getAs<PostStmtPurgeDeadSymbols>())
Out << "PostStmtPurgeDeadSymbols";
else if (getAs<PreStmtPurgeDeadSymbols>())
Out << "PreStmtPurgeDeadSymbols";
else if (getAs<PreStmt>())
Out << "PreStmt";
else {
Out << "\nKind: '" << getKind();
llvm_unreachable("' is unhandled StmtPoint kind!");
}
Out << '\"';
break;
}
}
}
SimpleProgramPointTag::SimpleProgramPointTag(StringRef MsgProvider,
StringRef Msg)
: Desc((MsgProvider + " : " + Msg).str()) {}
StringRef SimpleProgramPointTag::getTagDescription() const {
return Desc;
}
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