1 files changed, 0 insertions, 419 deletions
diff --git a/lib/StaticAnalyzer/Checkers/ExprInspectionChecker.cpp b/lib/StaticAnalyzer/Checkers/ExprInspectionChecker.cpp
deleted file mode 100644
index 17c813962a234..0000000000000
--- a/lib/StaticAnalyzer/Checkers/ExprInspectionChecker.cpp
+++ /dev/null
@@ -1,419 +0,0 @@
-//==- ExprInspectionChecker.cpp - Used for regression tests ------*- 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
-//
-//===----------------------------------------------------------------------===//
-
-#include "clang/StaticAnalyzer/Checkers/BuiltinCheckerRegistration.h"
-#include "clang/StaticAnalyzer/Checkers/SValExplainer.h"
-#include "clang/StaticAnalyzer/Core/BugReporter/BugType.h"
-#include "clang/StaticAnalyzer/Core/Checker.h"
-#include "clang/StaticAnalyzer/Core/IssueHash.h"
-#include "clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h"
-#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
-#include "llvm/ADT/StringSwitch.h"
-#include "llvm/Support/ScopedPrinter.h"
-
-using namespace clang;
-using namespace ento;
-
-namespace {
-class ExprInspectionChecker : public Checker<eval::Call, check::DeadSymbols,
-                                             check::EndAnalysis> {
-  mutable std::unique_ptr<BugType> BT;
-
-  // These stats are per-analysis, not per-branch, hence they shouldn't
-  // stay inside the program state.
-  struct ReachedStat {
-    ExplodedNode *ExampleNode;
-    unsigned NumTimesReached;
-  };
-  mutable llvm::DenseMap<const CallExpr *, ReachedStat> ReachedStats;
-
-  void analyzerEval(const CallExpr *CE, CheckerContext &C) const;
-  void analyzerCheckInlined(const CallExpr *CE, CheckerContext &C) const;
-  void analyzerWarnIfReached(const CallExpr *CE, CheckerContext &C) const;
-  void analyzerNumTimesReached(const CallExpr *CE, CheckerContext &C) const;
-  void analyzerCrash(const CallExpr *CE, CheckerContext &C) const;
-  void analyzerWarnOnDeadSymbol(const CallExpr *CE, CheckerContext &C) const;
-  void analyzerDump(const CallExpr *CE, CheckerContext &C) const;
-  void analyzerExplain(const CallExpr *CE, CheckerContext &C) const;
-  void analyzerPrintState(const CallExpr *CE, CheckerContext &C) const;
-  void analyzerGetExtent(const CallExpr *CE, CheckerContext &C) const;
-  void analyzerHashDump(const CallExpr *CE, CheckerContext &C) const;
-  void analyzerDenote(const CallExpr *CE, CheckerContext &C) const;
-  void analyzerExpress(const CallExpr *CE, CheckerContext &C) const;
-
-  typedef void (ExprInspectionChecker::*FnCheck)(const CallExpr *,
-                                                 CheckerContext &C) const;
-
-  ExplodedNode *reportBug(llvm::StringRef Msg, CheckerContext &C) const;
-  ExplodedNode *reportBug(llvm::StringRef Msg, BugReporter &BR,
-                          ExplodedNode *N) const;
-
-public:
-  bool evalCall(const CallEvent &Call, CheckerContext &C) const;
-  void checkDeadSymbols(SymbolReaper &SymReaper, CheckerContext &C) const;
-  void checkEndAnalysis(ExplodedGraph &G, BugReporter &BR,
-                        ExprEngine &Eng) const;
-};
-}
-
-REGISTER_SET_WITH_PROGRAMSTATE(MarkedSymbols, SymbolRef)
-REGISTER_MAP_WITH_PROGRAMSTATE(DenotedSymbols, SymbolRef, const StringLiteral *)
-
-bool ExprInspectionChecker::evalCall(const CallEvent &Call,
-                                     CheckerContext &C) const {
-  const auto *CE = dyn_cast_or_null<CallExpr>(Call.getOriginExpr());
-  if (!CE)
-    return false;
-
-  // These checks should have no effect on the surrounding environment
-  // (globals should not be invalidated, etc), hence the use of evalCall.
-  FnCheck Handler = llvm::StringSwitch<FnCheck>(C.getCalleeName(CE))
-    .Case("clang_analyzer_eval", &ExprInspectionChecker::analyzerEval)
-    .Case("clang_analyzer_checkInlined",
-          &ExprInspectionChecker::analyzerCheckInlined)
-    .Case("clang_analyzer_crash", &ExprInspectionChecker::analyzerCrash)
-    .Case("clang_analyzer_warnIfReached",
-          &ExprInspectionChecker::analyzerWarnIfReached)
-    .Case("clang_analyzer_warnOnDeadSymbol",
-          &ExprInspectionChecker::analyzerWarnOnDeadSymbol)
-    .StartsWith("clang_analyzer_explain", &ExprInspectionChecker::analyzerExplain)
-    .StartsWith("clang_analyzer_dump", &ExprInspectionChecker::analyzerDump)
-    .Case("clang_analyzer_getExtent", &ExprInspectionChecker::analyzerGetExtent)
-    .Case("clang_analyzer_printState",
-          &ExprInspectionChecker::analyzerPrintState)
-    .Case("clang_analyzer_numTimesReached",
-          &ExprInspectionChecker::analyzerNumTimesReached)
-    .Case("clang_analyzer_hashDump", &ExprInspectionChecker::analyzerHashDump)
-    .Case("clang_analyzer_denote", &ExprInspectionChecker::analyzerDenote)
-    .Case("clang_analyzer_express", &ExprInspectionChecker::analyzerExpress)
-    .Default(nullptr);
-
-  if (!Handler)
-    return false;
-
-  (this->*Handler)(CE, C);
-  return true;
-}
-
-static const char *getArgumentValueString(const CallExpr *CE,
-                                          CheckerContext &C) {
-  if (CE->getNumArgs() == 0)
-    return "Missing assertion argument";
-
-  ExplodedNode *N = C.getPredecessor();
-  const LocationContext *LC = N->getLocationContext();
-  ProgramStateRef State = N->getState();
-
-  const Expr *Assertion = CE->getArg(0);
-  SVal AssertionVal = State->getSVal(Assertion, LC);
-
-  if (AssertionVal.isUndef())
-    return "UNDEFINED";
-
-  ProgramStateRef StTrue, StFalse;
-  std::tie(StTrue, StFalse) =
-    State->assume(AssertionVal.castAs<DefinedOrUnknownSVal>());
-
-  if (StTrue) {
-    if (StFalse)
-      return "UNKNOWN";
-    else
-      return "TRUE";
-  } else {
-    if (StFalse)
-      return "FALSE";
-    else
-      llvm_unreachable("Invalid constraint; neither true or false.");
-  }
-}
-
-ExplodedNode *ExprInspectionChecker::reportBug(llvm::StringRef Msg,
-                                               CheckerContext &C) const {
-  ExplodedNode *N = C.generateNonFatalErrorNode();
-  reportBug(Msg, C.getBugReporter(), N);
-  return N;
-}
-
-ExplodedNode *ExprInspectionChecker::reportBug(llvm::StringRef Msg,
-                                               BugReporter &BR,
-                                               ExplodedNode *N) const {
-  if (!N)
-    return nullptr;
-
-  if (!BT)
-    BT.reset(new BugType(this, "Checking analyzer assumptions", "debug"));
-
-  BR.emitReport(std::make_unique<PathSensitiveBugReport>(*BT, Msg, N));
-  return N;
-}
-
-void ExprInspectionChecker::analyzerEval(const CallExpr *CE,
-                                         CheckerContext &C) const {
-  const LocationContext *LC = C.getPredecessor()->getLocationContext();
-
-  // A specific instantiation of an inlined function may have more constrained
-  // values than can generally be assumed. Skip the check.
-  if (LC->getStackFrame()->getParent() != nullptr)
-    return;
-
-  reportBug(getArgumentValueString(CE, C), C);
-}
-
-void ExprInspectionChecker::analyzerWarnIfReached(const CallExpr *CE,
-                                                  CheckerContext &C) const {
-  reportBug("REACHABLE", C);
-}
-
-void ExprInspectionChecker::analyzerNumTimesReached(const CallExpr *CE,
-                                                    CheckerContext &C) const {
-  ++ReachedStats[CE].NumTimesReached;
-  if (!ReachedStats[CE].ExampleNode) {
-    // Later, in checkEndAnalysis, we'd throw a report against it.
-    ReachedStats[CE].ExampleNode = C.generateNonFatalErrorNode();
-  }
-}
-
-void ExprInspectionChecker::analyzerCheckInlined(const CallExpr *CE,
-                                                 CheckerContext &C) const {
-  const LocationContext *LC = C.getPredecessor()->getLocationContext();
-
-  // An inlined function could conceivably also be analyzed as a top-level
-  // function. We ignore this case and only emit a message (TRUE or FALSE)
-  // when we are analyzing it as an inlined function. This means that
-  // clang_analyzer_checkInlined(true) should always print TRUE, but
-  // clang_analyzer_checkInlined(false) should never actually print anything.
-  if (LC->getStackFrame()->getParent() == nullptr)
-    return;
-
-  reportBug(getArgumentValueString(CE, C), C);
-}
-
-void ExprInspectionChecker::analyzerExplain(const CallExpr *CE,
-                                            CheckerContext &C) const {
-  if (CE->getNumArgs() == 0) {
-    reportBug("Missing argument for explaining", C);
-    return;
-  }
-
-  SVal V = C.getSVal(CE->getArg(0));
-  SValExplainer Ex(C.getASTContext());
-  reportBug(Ex.Visit(V), C);
-}
-
-void ExprInspectionChecker::analyzerDump(const CallExpr *CE,
-                                         CheckerContext &C) const {
-  if (CE->getNumArgs() == 0) {
-    reportBug("Missing argument for dumping", C);
-    return;
-  }
-
-  SVal V = C.getSVal(CE->getArg(0));
-
-  llvm::SmallString<32> Str;
-  llvm::raw_svector_ostream OS(Str);
-  V.dumpToStream(OS);
-  reportBug(OS.str(), C);
-}
-
-void ExprInspectionChecker::analyzerGetExtent(const CallExpr *CE,
-                                              CheckerContext &C) const {
-  if (CE->getNumArgs() == 0) {
-    reportBug("Missing region for obtaining extent", C);
-    return;
-  }
-
-  auto MR = dyn_cast_or_null<SubRegion>(C.getSVal(CE->getArg(0)).getAsRegion());
-  if (!MR) {
-    reportBug("Obtaining extent of a non-region", C);
-    return;
-  }
-
-  ProgramStateRef State = C.getState();
-  State = State->BindExpr(CE, C.getLocationContext(),
-                          MR->getExtent(C.getSValBuilder()));
-  C.addTransition(State);
-}
-
-void ExprInspectionChecker::analyzerPrintState(const CallExpr *CE,
-                                               CheckerContext &C) const {
-  C.getState()->dump();
-}
-
-void ExprInspectionChecker::analyzerWarnOnDeadSymbol(const CallExpr *CE,
-                                                     CheckerContext &C) const {
-  if (CE->getNumArgs() == 0)
-    return;
-  SVal Val = C.getSVal(CE->getArg(0));
-  SymbolRef Sym = Val.getAsSymbol();
-  if (!Sym)
-    return;
-
-  ProgramStateRef State = C.getState();
-  State = State->add<MarkedSymbols>(Sym);
-  C.addTransition(State);
-}
-
-void ExprInspectionChecker::checkDeadSymbols(SymbolReaper &SymReaper,
-                                             CheckerContext &C) const {
-  ProgramStateRef State = C.getState();
-  const MarkedSymbolsTy &Syms = State->get<MarkedSymbols>();
-  ExplodedNode *N = C.getPredecessor();
-  for (auto I = Syms.begin(), E = Syms.end(); I != E; ++I) {
-    SymbolRef Sym = *I;
-    if (!SymReaper.isDead(Sym))
-      continue;
-
-    // The non-fatal error node should be the same for all reports.
-    if (ExplodedNode *BugNode = reportBug("SYMBOL DEAD", C))
-      N = BugNode;
-    State = State->remove<MarkedSymbols>(Sym);
-  }
-
-  for (auto I : State->get<DenotedSymbols>()) {
-    SymbolRef Sym = I.first;
-    if (!SymReaper.isLive(Sym))
-      State = State->remove<DenotedSymbols>(Sym);
-  }
-
-  C.addTransition(State, N);
-}
-
-void ExprInspectionChecker::checkEndAnalysis(ExplodedGraph &G, BugReporter &BR,
-                                             ExprEngine &Eng) const {
-  for (auto Item: ReachedStats) {
-    unsigned NumTimesReached = Item.second.NumTimesReached;
-    ExplodedNode *N = Item.second.ExampleNode;
-
-    reportBug(llvm::to_string(NumTimesReached), BR, N);
-  }
-  ReachedStats.clear();
-}
-
-void ExprInspectionChecker::analyzerCrash(const CallExpr *CE,
-                                          CheckerContext &C) const {
-  LLVM_BUILTIN_TRAP;
-}
-
-void ExprInspectionChecker::analyzerHashDump(const CallExpr *CE,
-                                             CheckerContext &C) const {
-  const LangOptions &Opts = C.getLangOpts();
-  const SourceManager &SM = C.getSourceManager();
-  FullSourceLoc FL(CE->getArg(0)->getBeginLoc(), SM);
-  std::string HashContent =
-      GetIssueString(SM, FL, getCheckerName().getName(), "Category",
-                     C.getLocationContext()->getDecl(), Opts);
-
-  reportBug(HashContent, C);
-}
-
-void ExprInspectionChecker::analyzerDenote(const CallExpr *CE,
-                                           CheckerContext &C) const {
-  if (CE->getNumArgs() < 2) {
-    reportBug("clang_analyzer_denote() requires a symbol and a string literal",
-              C);
-    return;
-  }
-
-  SymbolRef Sym = C.getSVal(CE->getArg(0)).getAsSymbol();
-  if (!Sym) {
-    reportBug("Not a symbol", C);
-    return;
-  }
-
-  const auto *E = dyn_cast<StringLiteral>(CE->getArg(1)->IgnoreParenCasts());
-  if (!E) {
-    reportBug("Not a string literal", C);
-    return;
-  }
-
-  ProgramStateRef State = C.getState();
-
-  C.addTransition(C.getState()->set<DenotedSymbols>(Sym, E));
-}
-
-namespace {
-class SymbolExpressor
-    : public SymExprVisitor<SymbolExpressor, Optional<std::string>> {
-  ProgramStateRef State;
-
-public:
-  SymbolExpressor(ProgramStateRef State) : State(State) {}
-
-  Optional<std::string> lookup(const SymExpr *S) {
-    if (const StringLiteral *const *SLPtr = State->get<DenotedSymbols>(S)) {
-      const StringLiteral *SL = *SLPtr;
-      return std::string(SL->getBytes());
-    }
-    return None;
-  }
-
-  Optional<std::string> VisitSymExpr(const SymExpr *S) {
-    return lookup(S);
-  }
-
-  Optional<std::string> VisitSymIntExpr(const SymIntExpr *S) {
-    if (Optional<std::string> Str = lookup(S))
-      return Str;
-    if (Optional<std::string> Str = Visit(S->getLHS()))
-      return (*Str + " " + BinaryOperator::getOpcodeStr(S->getOpcode()) + " " +
-              std::to_string(S->getRHS().getLimitedValue()) +
-              (S->getRHS().isUnsigned() ? "U" : ""))
-          .str();
-    return None;
-  }
-
-  Optional<std::string> VisitSymSymExpr(const SymSymExpr *S) {
-    if (Optional<std::string> Str = lookup(S))
-      return Str;
-    if (Optional<std::string> Str1 = Visit(S->getLHS()))
-      if (Optional<std::string> Str2 = Visit(S->getRHS()))
-        return (*Str1 + " " + BinaryOperator::getOpcodeStr(S->getOpcode()) +
-                " " + *Str2).str();
-    return None;
-  }
-
-  Optional<std::string> VisitSymbolCast(const SymbolCast *S) {
-    if (Optional<std::string> Str = lookup(S))
-      return Str;
-    if (Optional<std::string> Str = Visit(S->getOperand()))
-      return (Twine("(") + S->getType().getAsString() + ")" + *Str).str();
-    return None;
-  }
-};
-} // namespace
-
-void ExprInspectionChecker::analyzerExpress(const CallExpr *CE,
-                                            CheckerContext &C) const {
-  if (CE->getNumArgs() == 0) {
-    reportBug("clang_analyzer_express() requires a symbol", C);
-    return;
-  }
-
-  SymbolRef Sym = C.getSVal(CE->getArg(0)).getAsSymbol();
-  if (!Sym) {
-    reportBug("Not a symbol", C);
-    return;
-  }
-
-  SymbolExpressor V(C.getState());
-  auto Str = V.Visit(Sym);
-  if (!Str) {
-    reportBug("Unable to express", C);
-    return;
-  }
-
-  reportBug(*Str, C);
-}
-
-void ento::registerExprInspectionChecker(CheckerManager &Mgr) {
-  Mgr.registerChecker<ExprInspectionChecker>();
-}
-
-bool ento::shouldRegisterExprInspectionChecker(const LangOptions &LO) {
-  return true;
-}