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