1 files changed, 0 insertions, 295 deletions
diff --git a/clang/lib/Analysis/FlowSensitive/Models/UncheckedStatusOrAccessModel.cpp b/clang/lib/Analysis/FlowSensitive/Models/UncheckedStatusOrAccessModel.cpp
deleted file mode 100644
index 75b0959491c2..000000000000
--- a/clang/lib/Analysis/FlowSensitive/Models/UncheckedStatusOrAccessModel.cpp
+++ /dev/null
@@ -1,295 +0,0 @@
-//===- UncheckedStatusOrAccessModel.cpp -----------------------------------===//
-//
-// 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/Analysis/FlowSensitive/Models/UncheckedStatusOrAccessModel.h"
-
-#include <cassert>
-#include <utility>
-
-#include "clang/AST/DeclCXX.h"
-#include "clang/AST/DeclTemplate.h"
-#include "clang/AST/Expr.h"
-#include "clang/AST/ExprCXX.h"
-#include "clang/AST/TypeBase.h"
-#include "clang/ASTMatchers/ASTMatchFinder.h"
-#include "clang/ASTMatchers/ASTMatchers.h"
-#include "clang/ASTMatchers/ASTMatchersInternal.h"
-#include "clang/Analysis/CFG.h"
-#include "clang/Analysis/FlowSensitive/CFGMatchSwitch.h"
-#include "clang/Analysis/FlowSensitive/DataflowAnalysis.h"
-#include "clang/Analysis/FlowSensitive/DataflowEnvironment.h"
-#include "clang/Analysis/FlowSensitive/MatchSwitch.h"
-#include "clang/Analysis/FlowSensitive/StorageLocation.h"
-#include "clang/Analysis/FlowSensitive/Value.h"
-#include "clang/Basic/LLVM.h"
-#include "clang/Basic/SourceLocation.h"
-#include "llvm/ADT/StringMap.h"
-
-namespace clang::dataflow::statusor_model {
-namespace {
-
-using ::clang::ast_matchers::MatchFinder;
-using ::clang::ast_matchers::StatementMatcher;
-
-} // namespace
-
-static bool namespaceEquals(const NamespaceDecl *NS,
-                            clang::ArrayRef<clang::StringRef> NamespaceNames) {
-  while (!NamespaceNames.empty() && NS) {
-    if (NS->getName() != NamespaceNames.consume_back())
-      return false;
-    NS = dyn_cast_or_null<NamespaceDecl>(NS->getParent());
-  }
-  return NamespaceNames.empty() && !NS;
-}
-
-// TODO: move this to a proper place to share with the rest of clang
-static bool isTypeNamed(QualType Type, clang::ArrayRef<clang::StringRef> NS,
-                        StringRef Name) {
-  if (Type.isNull())
-    return false;
-  if (auto *RD = Type->getAsRecordDecl())
-    if (RD->getName() == Name)
-      if (const auto *N = dyn_cast_or_null<NamespaceDecl>(RD->getDeclContext()))
-        return namespaceEquals(N, NS);
-  return false;
-}
-
-static bool isStatusOrOperatorBaseType(QualType Type) {
-  return isTypeNamed(Type, {"absl", "internal_statusor"}, "OperatorBase");
-}
-
-static bool isSafeUnwrap(RecordStorageLocation *StatusOrLoc,
-                         const Environment &Env) {
-  if (!StatusOrLoc)
-    return false;
-  auto &StatusLoc = locForStatus(*StatusOrLoc);
-  auto *OkVal = Env.get<BoolValue>(locForOk(StatusLoc));
-  return OkVal != nullptr && Env.proves(OkVal->formula());
-}
-
-static ClassTemplateSpecializationDecl *
-getStatusOrBaseClass(const QualType &Ty) {
-  auto *RD = Ty->getAsCXXRecordDecl();
-  if (RD == nullptr)
-    return nullptr;
-  if (isStatusOrType(Ty) ||
-      // In case we are analyzing code under OperatorBase itself that uses
-      // operator* (e.g. to implement operator->).
-      isStatusOrOperatorBaseType(Ty))
-    return cast<ClassTemplateSpecializationDecl>(RD);
-  if (!RD->hasDefinition())
-    return nullptr;
-  for (const auto &Base : RD->bases())
-    if (auto *QT = getStatusOrBaseClass(Base.getType()))
-      return QT;
-  return nullptr;
-}
-
-static QualType getStatusOrValueType(ClassTemplateSpecializationDecl *TRD) {
-  return TRD->getTemplateArgs().get(0).getAsType();
-}
-
-static auto isStatusOrMemberCallWithName(llvm::StringRef member_name) {
-  using namespace ::clang::ast_matchers; // NOLINT: Too many names
-  return cxxMemberCallExpr(
-      on(expr(unless(cxxThisExpr()))),
-      callee(cxxMethodDecl(
-          hasName(member_name),
-          ofClass(anyOf(statusOrClass(), statusOrOperatorBaseClass())))));
-}
-
-static auto isStatusOrOperatorCallWithName(llvm::StringRef operator_name) {
-  using namespace ::clang::ast_matchers; // NOLINT: Too many names
-  return cxxOperatorCallExpr(
-      hasOverloadedOperatorName(operator_name),
-      callee(cxxMethodDecl(
-          ofClass(anyOf(statusOrClass(), statusOrOperatorBaseClass())))));
-}
-
-static auto valueCall() {
-  using namespace ::clang::ast_matchers; // NOLINT: Too many names
-  return anyOf(isStatusOrMemberCallWithName("value"),
-               isStatusOrMemberCallWithName("ValueOrDie"));
-}
-
-static auto valueOperatorCall() {
-  using namespace ::clang::ast_matchers; // NOLINT: Too many names
-  return expr(anyOf(isStatusOrOperatorCallWithName("*"),
-                    isStatusOrOperatorCallWithName("->")));
-}
-
-static auto
-buildDiagnoseMatchSwitch(const UncheckedStatusOrAccessModelOptions &Options) {
-  return CFGMatchSwitchBuilder<const Environment,
-                               llvm::SmallVector<SourceLocation>>()
-      // StatusOr::value, StatusOr::ValueOrDie
-      .CaseOfCFGStmt<CXXMemberCallExpr>(
-          valueCall(),
-          [](const CXXMemberCallExpr *E,
-             const ast_matchers::MatchFinder::MatchResult &,
-             const Environment &Env) {
-            if (!isSafeUnwrap(getImplicitObjectLocation(*E, Env), Env))
-              return llvm::SmallVector<SourceLocation>({E->getExprLoc()});
-            return llvm::SmallVector<SourceLocation>();
-          })
-
-      // StatusOr::operator*, StatusOr::operator->
-      .CaseOfCFGStmt<CXXOperatorCallExpr>(
-          valueOperatorCall(),
-          [](const CXXOperatorCallExpr *E,
-             const ast_matchers::MatchFinder::MatchResult &,
-             const Environment &Env) {
-            RecordStorageLocation *StatusOrLoc =
-                Env.get<RecordStorageLocation>(*E->getArg(0));
-            if (!isSafeUnwrap(StatusOrLoc, Env))
-              return llvm::SmallVector<SourceLocation>({E->getOperatorLoc()});
-            return llvm::SmallVector<SourceLocation>();
-          })
-      .Build();
-}
-
-UncheckedStatusOrAccessDiagnoser::UncheckedStatusOrAccessDiagnoser(
-    UncheckedStatusOrAccessModelOptions Options)
-    : DiagnoseMatchSwitch(buildDiagnoseMatchSwitch(Options)) {}
-
-llvm::SmallVector<SourceLocation> UncheckedStatusOrAccessDiagnoser::operator()(
-    const CFGElement &Elt, ASTContext &Ctx,
-    const TransferStateForDiagnostics<UncheckedStatusOrAccessModel::Lattice>
-        &State) {
-  return DiagnoseMatchSwitch(Elt, Ctx, State.Env);
-}
-
-BoolValue &initializeStatus(RecordStorageLocation &StatusLoc,
-                            Environment &Env) {
-  auto &OkVal = Env.makeAtomicBoolValue();
-  Env.setValue(locForOk(StatusLoc), OkVal);
-  return OkVal;
-}
-
-BoolValue &initializeStatusOr(RecordStorageLocation &StatusOrLoc,
-                              Environment &Env) {
-  return initializeStatus(locForStatus(StatusOrLoc), Env);
-}
-
-clang::ast_matchers::DeclarationMatcher statusOrClass() {
-  using namespace ::clang::ast_matchers; // NOLINT: Too many names
-  return classTemplateSpecializationDecl(
-      hasName("absl::StatusOr"),
-      hasTemplateArgument(0, refersToType(type().bind("T"))));
-}
-
-clang::ast_matchers::DeclarationMatcher statusClass() {
-  using namespace ::clang::ast_matchers; // NOLINT: Too many names
-  return cxxRecordDecl(hasName("absl::Status"));
-}
-
-clang::ast_matchers::DeclarationMatcher statusOrOperatorBaseClass() {
-  using namespace ::clang::ast_matchers; // NOLINT: Too many names
-  return classTemplateSpecializationDecl(
-      hasName("absl::internal_statusor::OperatorBase"));
-}
-
-clang::ast_matchers::TypeMatcher statusOrType() {
-  using namespace ::clang::ast_matchers; // NOLINT: Too many names
-  return hasCanonicalType(qualType(hasDeclaration(statusOrClass())));
-}
-
-bool isRecordTypeWithName(QualType Type, llvm::StringRef TypeName) {
-  return Type->isRecordType() &&
-         Type->getAsCXXRecordDecl()->getQualifiedNameAsString() == TypeName;
-}
-
-bool isStatusOrType(QualType Type) {
-  return isTypeNamed(Type, {"absl"}, "StatusOr");
-}
-
-bool isStatusType(QualType Type) {
-  return isTypeNamed(Type, {"absl"}, "Status");
-}
-
-llvm::StringMap<QualType> getSyntheticFields(QualType Ty, QualType StatusType,
-                                             const CXXRecordDecl &RD) {
-  if (auto *TRD = getStatusOrBaseClass(Ty))
-    return {{"status", StatusType}, {"value", getStatusOrValueType(TRD)}};
-  if (isStatusType(Ty) || (RD.hasDefinition() &&
-                           RD.isDerivedFrom(StatusType->getAsCXXRecordDecl())))
-    return {{"ok", RD.getASTContext().BoolTy}};
-  return {};
-}
-
-RecordStorageLocation &locForStatus(RecordStorageLocation &StatusOrLoc) {
-  return cast<RecordStorageLocation>(StatusOrLoc.getSyntheticField("status"));
-}
-
-StorageLocation &locForOk(RecordStorageLocation &StatusLoc) {
-  return StatusLoc.getSyntheticField("ok");
-}
-
-BoolValue &valForOk(RecordStorageLocation &StatusLoc, Environment &Env) {
-  if (auto *Val = Env.get<BoolValue>(locForOk(StatusLoc)))
-    return *Val;
-  return initializeStatus(StatusLoc, Env);
-}
-
-static void transferStatusOrOkCall(const CXXMemberCallExpr *Expr,
-                                   const MatchFinder::MatchResult &,
-                                   LatticeTransferState &State) {
-  RecordStorageLocation *StatusOrLoc =
-      getImplicitObjectLocation(*Expr, State.Env);
-  if (StatusOrLoc == nullptr)
-    return;
-
-  auto &OkVal = valForOk(locForStatus(*StatusOrLoc), State.Env);
-  State.Env.setValue(*Expr, OkVal);
-}
-
-CFGMatchSwitch<LatticeTransferState>
-buildTransferMatchSwitch(ASTContext &Ctx,
-                         CFGMatchSwitchBuilder<LatticeTransferState> Builder) {
-  using namespace ::clang::ast_matchers; // NOLINT: Too many names
-  return std::move(Builder)
-      .CaseOfCFGStmt<CXXMemberCallExpr>(isStatusOrMemberCallWithName("ok"),
-                                        transferStatusOrOkCall)
-      .Build();
-}
-
-QualType findStatusType(const ASTContext &Ctx) {
-  for (Type *Ty : Ctx.getTypes())
-    if (isStatusType(QualType(Ty, 0)))
-      return QualType(Ty, 0);
-
-  return QualType();
-}
-
-UncheckedStatusOrAccessModel::UncheckedStatusOrAccessModel(ASTContext &Ctx,
-                                                           Environment &Env)
-    : DataflowAnalysis<UncheckedStatusOrAccessModel,
-                       UncheckedStatusOrAccessModel::Lattice>(Ctx),
-      TransferMatchSwitch(buildTransferMatchSwitch(Ctx, {})) {
-  QualType StatusType = findStatusType(Ctx);
-  Env.getDataflowAnalysisContext().setSyntheticFieldCallback(
-      [StatusType](QualType Ty) -> llvm::StringMap<QualType> {
-        CXXRecordDecl *RD = Ty->getAsCXXRecordDecl();
-        if (RD == nullptr)
-          return {};
-
-        if (auto Fields = getSyntheticFields(Ty, StatusType, *RD);
-            !Fields.empty())
-          return Fields;
-        return {};
-      });
-}
-
-void UncheckedStatusOrAccessModel::transfer(const CFGElement &Elt, Lattice &L,
-                                            Environment &Env) {
-  LatticeTransferState State(L, Env);
-  TransferMatchSwitch(Elt, getASTContext(), State);
-}
-
-} // namespace clang::dataflow::statusor_model